Abstract The temperature reached by solar cells/modules during operation has been simulated to have information about the temperature distribution in the solar cell/module. A finite element (FE) model of the solar cell/module was created in COMSOL Multiphysics environment. The simulations enable visualization of the temperature distribution in crystalline silicon solar cell. The effect of different encapsulating materials, Ethylene-vinyl Acetate (EVA) and silicone on cell temperature are also investigated. An unwanted side-effect of the encapsulation of solar cells into a PV module is that the encapsulation alters the heat flow into and out of the PV module, thereby increasing the operating temperature of the PV module. These increases in temperature have a major impact on the PV module by reducing its voltage, thereby lowering the output power. A finite element (FE) model representing a real crystalline silicon solar cell/module in terms of size, mechanical and material properties is created. An in-depth study of the FE software used, COMSOL Multiphysics is done in other to get the best output in terms of solver configuration and memory considerations. Four different geometries of the solar cell/module are created for these simulations; each representing a stage or variant in the solar module assembly. At first, the models are validated comparing results from simulations such as the effect of changes in solar irradiance, wind velocity and incident angle of solar irradiance on temperature with those in literature. The effect of the type of protective cover used in the encapsulation, either glass-glass or glass-Tedlar on cell temperature is analyzed. The thickness of the protective cover layers and its optical properties are also investigated based on their effects on cell/module temperature. All the simulations leading to the conclusions drawn about the cell/module temperature and its distribution were performed by varying wind velocity, irradiance, material sizes and incident angle among other model modifications. The color maps and graphs are presented in this study. Key Words: Modeling, COMSOL Multipysics, Crystalline silicon solar cell/module, FE simulations, Temperature
The usage of thermoelectric generator as a renewable energy sourceTELKOMNIKA JOURNAL
Currently thermoelectric generators (TEG) are widely used in biomedical, military and space satellite power applications. TEG of high power plants are mostly used in automobile and industrial engines. This paper discusses TEG as a renewable energy source. Here the TEG in the application is used in the thermoelectric generator power plant. The working principle of this thermoelectric generator is on the heat side of the TEG peltier which is coated in metal in the form of aluminum, which is heated by a heater. And the cold side of the TEG Peltier is placed on the heat sink (as a heat dissipation metal). Heatsinks are submerged in water which are submerged about half or more. If the temperature of the metal being heated and the temperature of heat dissipation metal have a certain difference, then the temperature difference causes TEG to start working. The greater the temperature difference, the greater the electrical energy produced will be. However, if the temperature difference is too large it will damage the bismuth semiconductor material used. After TEG starts working it will produce voltage and current.
This research investigates the vitality advantages and future capability of using Electrochromic Glazing (ECG) System in sustainable courtyards in residential buildings inside the climatic states of the Amman city at the concept stage.This research considers the applied methodology to improve sustainability of courtyard, considering solar irradiation and buildings energy needs for cooling and heating.The Revit “energy modeling software” programming is utilized to evaluate the energy efficiency, chiefly the decreases in lighting,”heating, ventilating, and air conditioning” (HVAC), for various states and contrast that to the regular glassThe study findings show that adding ECG system to courtyard reduces the energy consumption, therefore the building saves 25 % of the energy in clear state, and when the system is tinted, it saves 57,5% of the energy, this applies to the summer season. While in the case of winter, the ECG system is efficient in energy consumption with heating, the building saves 80% of energy consumption, which reduces the cost. The study concludes that the number of years needed to recover the price of ECG system is 7.8 years which means that the courtyard is a sustainable solution in residential design according to Revit Program and Enterprise Green Communities (EGC) standard
A case study on performance evaluation of grid connected pv generation system...eSAT Journals
Abstract
Energy is an important aspect in the today’s world. Due to the increase in the population and the decrease in oil and other energy
resources the power generation using renewable energy has become more popular. The proper paper presents the feasibility
analysis of implementing the photovoltaic system for a residential house in UAE using a grid connected system. In this paper real
data for a typical residential house with the present electricity cost in UAE is taken in to consideration for the analysis. RET
screen software has been used for the economic analysis. The software has also been used to get the climatic conditions like
humidity, temperature with the radiations. The effect of these conditions with the efficiency of the solar panels was also analyzed.
Keywords: Photovoltaic system, RET screen, Feasibility, Energy Analysis
The usage of thermoelectric generator as a renewable energy sourceTELKOMNIKA JOURNAL
Currently thermoelectric generators (TEG) are widely used in biomedical, military and space satellite power applications. TEG of high power plants are mostly used in automobile and industrial engines. This paper discusses TEG as a renewable energy source. Here the TEG in the application is used in the thermoelectric generator power plant. The working principle of this thermoelectric generator is on the heat side of the TEG peltier which is coated in metal in the form of aluminum, which is heated by a heater. And the cold side of the TEG Peltier is placed on the heat sink (as a heat dissipation metal). Heatsinks are submerged in water which are submerged about half or more. If the temperature of the metal being heated and the temperature of heat dissipation metal have a certain difference, then the temperature difference causes TEG to start working. The greater the temperature difference, the greater the electrical energy produced will be. However, if the temperature difference is too large it will damage the bismuth semiconductor material used. After TEG starts working it will produce voltage and current.
This research investigates the vitality advantages and future capability of using Electrochromic Glazing (ECG) System in sustainable courtyards in residential buildings inside the climatic states of the Amman city at the concept stage.This research considers the applied methodology to improve sustainability of courtyard, considering solar irradiation and buildings energy needs for cooling and heating.The Revit “energy modeling software” programming is utilized to evaluate the energy efficiency, chiefly the decreases in lighting,”heating, ventilating, and air conditioning” (HVAC), for various states and contrast that to the regular glassThe study findings show that adding ECG system to courtyard reduces the energy consumption, therefore the building saves 25 % of the energy in clear state, and when the system is tinted, it saves 57,5% of the energy, this applies to the summer season. While in the case of winter, the ECG system is efficient in energy consumption with heating, the building saves 80% of energy consumption, which reduces the cost. The study concludes that the number of years needed to recover the price of ECG system is 7.8 years which means that the courtyard is a sustainable solution in residential design according to Revit Program and Enterprise Green Communities (EGC) standard
A case study on performance evaluation of grid connected pv generation system...eSAT Journals
Abstract
Energy is an important aspect in the today’s world. Due to the increase in the population and the decrease in oil and other energy
resources the power generation using renewable energy has become more popular. The proper paper presents the feasibility
analysis of implementing the photovoltaic system for a residential house in UAE using a grid connected system. In this paper real
data for a typical residential house with the present electricity cost in UAE is taken in to consideration for the analysis. RET
screen software has been used for the economic analysis. The software has also been used to get the climatic conditions like
humidity, temperature with the radiations. The effect of these conditions with the efficiency of the solar panels was also analyzed.
Keywords: Photovoltaic system, RET screen, Feasibility, Energy Analysis
A Management of power flow for DC Microgrid with Solar and Wind Energy SourcesAsoka Technologies
Today there is a rapid proliferation of DC loads into the market and DC micro grid with renewable energy sources is emerging as a possible solution to meet growing energy demand. As different energy sources like solar, wind, fuel cell, and diesel generators can be integrated into the DC grid, Management of power flow among the sources is essential. In this paper, a control strategy for Management of power flow in DC micro grid with solar and wind energy sources is presented. As the regulation of voltage profile is important in a standalone system, a dedicated converter is to be employed for maintaining the DC link voltage. DC link voltage is regulated by the battery circuit while maximum power is extracted from Solar and Wind to feed the loads connected at the DC bus. A power flow algorithm is developed to control among three sources in the DC Microgrid. The algorithm is tested for various load conditions and for fluctuations in solar and wind power in MATLAB/SIMULINK environment.
This paper presents a modeling of 185W Mono-crystalline Solar Panel Using Matlab/Simulink approach. The objective of this project to carried out the efficiency and performance of Solar Panel. The type of solar panel in this project is a mono-crystalline by the SC Origin Company. A temperature and irradiance are the input parameters of the system. The outputs of the system are voltage, current and power. In addition, the data of temperature and irradiance from August to December 2017 by RETScreen Website. This data are used as an inout for PV System and the curve of I-V and P-V as the output. The data are collected at location 1.86° N, 103.09° E which is in Bandar Penggaram, Johor. The output result of I-V and P-V will be used to compare with the reference.
Modeling and Simulation of Grid Connected PV SystemYogeshIJTSRD
The paper describes the Grid connected solar photovoltaique system using DC DC boost converter and the DC AC inverter VSC to supplies electric power to the utility grid. The PV cell model is easy, accurate, and takes external temperature and solar radiation into consideration. The paper presents detailed transient models of the grid connected PV Battery hybrid generation system, and all these models are simulated by using MATLAB Simulink. PV array is firstly connected to the common dc bus by a boost converter, where the battery is also connected by a bi directional DC DC converter, and then integrated into the ac utility grid by a common DC AC inverter. Maximum power point tracking helps PV array to generate the maximum power to the grid, and the battery energy storage can be charged and discharge to balance the power between PV generation and utility grid. Ather Javed | Ameen Uddin Ahmad "Modeling and Simulation of Grid Connected PV System" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-5 , August 2021, URL: https://www.ijtsrd.com/papers/ijtsrd43845.pdf Paper URL: https://www.ijtsrd.com/engineering/electrical-engineering/43845/modeling-and-simulation-of-grid-connected-pv-system/ather-javed
Enhancing the Efficiency of Solar Panel Using Cooling SystemsIJERA Editor
The recent upsurge in the demand of photovoltaic systems is due to the fact that they produce electric power without causing much damage to the environment by directly converting the solar radiation into electric power. Solar energy is completely natural, it is considered as a clean energy source. So the study on enhancing the efficiency of solar panel is very necessary. Photovoltaic cells get overheated due to excessive solar radiation and ambient temperature. Therefore to rectify this problem different cooling systems are used so as to maintain the temperature of the cells
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Photovoltaic Modules Performance Loss Evaluation for Nsukka, South East Niger...IJERA Editor
The Photovoltaic (PV) systems and technology offer excellent reliability when designed with the right implementation tools and based on good technical judgements of components that make up each of the critical sections of solar power system. The PV array is an essential section of a solar power system and it is expected to function to deliver pre – estimated power based on design estimations. There are factors that derail the performance of PV modules; the contributions of these factors are peculiar to specific sites of installation, hence the need to empirically evaluate and characterize installation sites before deployment of PV systems. This paper presents the characterization of Nsukka (South East, Nigeria) environment using decent instrumentation; and consequently highlights the power loss indicators for PV modules in the target site while presenting equally mitigable design.
Impact of Shading, Soiling and Temperature on Solar Photovoltaic SystemYogeshIJTSRD
The main objective of this research paper is to study the effect due to shading, temperature, dust accumulation, snow, birddropping. The power output of the solar panels dependent upon the amount of sun radiation which reaches the solar cells and converts it into electrical energy through inverters. A various types of solar cells are used to manufacture the solar panels like Mono crystalline and polycrystalline. Many factors affect the performance of solar panels and efficiency of PV cells. Experiment was done by using some particles of sand 15g,20g , coal 30g , impact of building trees shading at 10m and 20m and at different temperature cold and hot .The power output of both clean and soiling ,without shading or with shading, at high or low temperature is included. The paper will also include the methods by which we can reduce the impact of dust, shading, high or too low temperature and improving the efficiency of solar panels. Ishrat Nabi "Impact of Shading, Soiling and Temperature on Solar Photovoltaic System" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-5 , August 2021, URL: https://www.ijtsrd.com/papers/ijtsrd43823.pdf Paper URL: https://www.ijtsrd.com/engineering/electrical-engineering/43823/impact-of-shading-soiling-and-temperature-on-solar-photovoltaic-system/ishrat-nabi
Cost Analysis of Small Scale Solar and Wind Energy SystemsIJMER
Abstract: The recent dramatic increase in the use of
renewable energy systems leading towards competitive
markets within the various individual renewable energy
systems. The aim of this paper is to prove the hypothesis
i.e. in next few years, when the cost of the solar PV
modules come down below 1$ per Watt, small wind
turbines become more costlier because of the cost of
structures required to support the wind generator. And
also if the threat from the market is not addressed both
technically and commercially, small wind turbine
manufactures will lose the competition to solar PV module
manufactures in the near visible future. Objective of this
paper is to do cost analysis on the industry data and prove
hypothesis and to arrive at the cutoff point, where after the
generating energy from the wind is not economically
feasible. With this cost analysis, author here by alarm for
the small scale wind turbine manufactures to take
necessary measures to survive the competitive markets of
small scale renewable energy systems.
Keywords: Renewable energy, Solar PV, Wind Turbine, Curve Fitting, Cost analysis.
Experimental Analysis of Factors Affecting the Power Output of the PV Module IJECEIAES
Energy is the driving force in all the sectors as it acts like an index of standard of living or prosperity of the people of the country. However heavy dependence on fossil fuels leads to global warming, hence there is a need for the use of clean, sustainable, and eco friendly form of energy. Among the various types of non-conventional energy solar energy is the fundamental as it is abundant, pollution free and universally available.Even though the main input to the PV system is the solar radiation still there are other factors which affects the efficiency of the pv module. In this paper real time experiment has been conducted to analyze the effect of various factors like irradiance, temperature, and angle of tilt, soiling, shading on the power output of the pv module. Temperature is a negative factor which reduces the efficiency of the module and can be reduced by various cooling arrangements. Presence of dust particles and shading obstructs the incident solar radiations entering the panel and the effect is seen in the iv and pv curve .For better performance solar tracking at maximum power point is suggested to improve the power output of the pv module.
Self Electricity Generation and Energy Saving By Solar Using Programmable Sys...theijes
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability.
Theoretical work submitted to the Journal should be original in its motivation or modeling structure. Empirical analysis should be based on a theoretical framework and should be capable of replication. It is expected that all materials required for replication (including computer programs and data sets) should be available upon request to the authors.
The International Journal of Engineering & Science would take much care in making your article published without much delay with your kind cooperation.
Maximizing Output Power of a Solar Panel via Combination of Sun Tracking and ...ijtsrd
Energy is the basic needs for human comforts and day to day activities. Energy is the key factor for social and economic developments in today scenario. Now a day’s global warming is the main problem of developing counties, due to the nonstop combustion of fossil fuels all over the world, creating environmental hazards and reducing conventional energy sources. This scenario is contributing to the need to search for an new renewable source of energy, which is clean and available in excess. Due to the huge impetus in the government policies on the development of solar energy, it is acting as a main alternative renewable energy source. The solar energy is popular due to easy maintenance, cleanliness, sustainability, and zero noise characteristics. Therefore, Photo Voltaic module supplying loads with and without Maximum Power Point Technique MPPT is applied in the current studies to find the best results. Since the Photovoltaic array output is known to be affected by radiation of sun and temperature, which makes is compulsory to find out an effective method to draw out maximum power from Photo Voltaic cell modules. In my work, Perturb and Observe PandO algorithm is selected because of its easy implementation Solar energy is the clean and eternal source of energy till the end of the world. In this paper main focus is how to improve the efficiency of solar based power generation .Solar energy is variable depends upon the time and the atmospheric condition and hence output of the solar cell is directly proportional to the insulation level and inversely proportional to cell temperature and also the cell never operates at maximum power. Bhoopendra Kumar Rajput | Ameen Uddin Ahmad "Maximizing Output Power of a Solar Panel via Combination of Sun Tracking and Maximum Power Point Tracking" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-6 , October 2020, URL: https://www.ijtsrd.com/papers/ijtsrd33406.pdf Paper Url: https://www.ijtsrd.com/engineering/electrical-engineering/33406/maximizing-output-power-of-a-solar-panel-via-combination-of-sun-tracking-and-maximum-power-point-tracking/bhoopendra-kumar-rajput
Impacts of the expansion in oil palm plantationCIFOR-ICRAF
This presentation uses case studies from Central Kalimantan to illustrate the impacts of expanding palm oil plantations.
Topics covered include tenure & land rights, permits, conflict, and natural disasters.
A Management of power flow for DC Microgrid with Solar and Wind Energy SourcesAsoka Technologies
Today there is a rapid proliferation of DC loads into the market and DC micro grid with renewable energy sources is emerging as a possible solution to meet growing energy demand. As different energy sources like solar, wind, fuel cell, and diesel generators can be integrated into the DC grid, Management of power flow among the sources is essential. In this paper, a control strategy for Management of power flow in DC micro grid with solar and wind energy sources is presented. As the regulation of voltage profile is important in a standalone system, a dedicated converter is to be employed for maintaining the DC link voltage. DC link voltage is regulated by the battery circuit while maximum power is extracted from Solar and Wind to feed the loads connected at the DC bus. A power flow algorithm is developed to control among three sources in the DC Microgrid. The algorithm is tested for various load conditions and for fluctuations in solar and wind power in MATLAB/SIMULINK environment.
This paper presents a modeling of 185W Mono-crystalline Solar Panel Using Matlab/Simulink approach. The objective of this project to carried out the efficiency and performance of Solar Panel. The type of solar panel in this project is a mono-crystalline by the SC Origin Company. A temperature and irradiance are the input parameters of the system. The outputs of the system are voltage, current and power. In addition, the data of temperature and irradiance from August to December 2017 by RETScreen Website. This data are used as an inout for PV System and the curve of I-V and P-V as the output. The data are collected at location 1.86° N, 103.09° E which is in Bandar Penggaram, Johor. The output result of I-V and P-V will be used to compare with the reference.
Modeling and Simulation of Grid Connected PV SystemYogeshIJTSRD
The paper describes the Grid connected solar photovoltaique system using DC DC boost converter and the DC AC inverter VSC to supplies electric power to the utility grid. The PV cell model is easy, accurate, and takes external temperature and solar radiation into consideration. The paper presents detailed transient models of the grid connected PV Battery hybrid generation system, and all these models are simulated by using MATLAB Simulink. PV array is firstly connected to the common dc bus by a boost converter, where the battery is also connected by a bi directional DC DC converter, and then integrated into the ac utility grid by a common DC AC inverter. Maximum power point tracking helps PV array to generate the maximum power to the grid, and the battery energy storage can be charged and discharge to balance the power between PV generation and utility grid. Ather Javed | Ameen Uddin Ahmad "Modeling and Simulation of Grid Connected PV System" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-5 , August 2021, URL: https://www.ijtsrd.com/papers/ijtsrd43845.pdf Paper URL: https://www.ijtsrd.com/engineering/electrical-engineering/43845/modeling-and-simulation-of-grid-connected-pv-system/ather-javed
Enhancing the Efficiency of Solar Panel Using Cooling SystemsIJERA Editor
The recent upsurge in the demand of photovoltaic systems is due to the fact that they produce electric power without causing much damage to the environment by directly converting the solar radiation into electric power. Solar energy is completely natural, it is considered as a clean energy source. So the study on enhancing the efficiency of solar panel is very necessary. Photovoltaic cells get overheated due to excessive solar radiation and ambient temperature. Therefore to rectify this problem different cooling systems are used so as to maintain the temperature of the cells
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Photovoltaic Modules Performance Loss Evaluation for Nsukka, South East Niger...IJERA Editor
The Photovoltaic (PV) systems and technology offer excellent reliability when designed with the right implementation tools and based on good technical judgements of components that make up each of the critical sections of solar power system. The PV array is an essential section of a solar power system and it is expected to function to deliver pre – estimated power based on design estimations. There are factors that derail the performance of PV modules; the contributions of these factors are peculiar to specific sites of installation, hence the need to empirically evaluate and characterize installation sites before deployment of PV systems. This paper presents the characterization of Nsukka (South East, Nigeria) environment using decent instrumentation; and consequently highlights the power loss indicators for PV modules in the target site while presenting equally mitigable design.
Impact of Shading, Soiling and Temperature on Solar Photovoltaic SystemYogeshIJTSRD
The main objective of this research paper is to study the effect due to shading, temperature, dust accumulation, snow, birddropping. The power output of the solar panels dependent upon the amount of sun radiation which reaches the solar cells and converts it into electrical energy through inverters. A various types of solar cells are used to manufacture the solar panels like Mono crystalline and polycrystalline. Many factors affect the performance of solar panels and efficiency of PV cells. Experiment was done by using some particles of sand 15g,20g , coal 30g , impact of building trees shading at 10m and 20m and at different temperature cold and hot .The power output of both clean and soiling ,without shading or with shading, at high or low temperature is included. The paper will also include the methods by which we can reduce the impact of dust, shading, high or too low temperature and improving the efficiency of solar panels. Ishrat Nabi "Impact of Shading, Soiling and Temperature on Solar Photovoltaic System" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-5 , August 2021, URL: https://www.ijtsrd.com/papers/ijtsrd43823.pdf Paper URL: https://www.ijtsrd.com/engineering/electrical-engineering/43823/impact-of-shading-soiling-and-temperature-on-solar-photovoltaic-system/ishrat-nabi
Cost Analysis of Small Scale Solar and Wind Energy SystemsIJMER
Abstract: The recent dramatic increase in the use of
renewable energy systems leading towards competitive
markets within the various individual renewable energy
systems. The aim of this paper is to prove the hypothesis
i.e. in next few years, when the cost of the solar PV
modules come down below 1$ per Watt, small wind
turbines become more costlier because of the cost of
structures required to support the wind generator. And
also if the threat from the market is not addressed both
technically and commercially, small wind turbine
manufactures will lose the competition to solar PV module
manufactures in the near visible future. Objective of this
paper is to do cost analysis on the industry data and prove
hypothesis and to arrive at the cutoff point, where after the
generating energy from the wind is not economically
feasible. With this cost analysis, author here by alarm for
the small scale wind turbine manufactures to take
necessary measures to survive the competitive markets of
small scale renewable energy systems.
Keywords: Renewable energy, Solar PV, Wind Turbine, Curve Fitting, Cost analysis.
Experimental Analysis of Factors Affecting the Power Output of the PV Module IJECEIAES
Energy is the driving force in all the sectors as it acts like an index of standard of living or prosperity of the people of the country. However heavy dependence on fossil fuels leads to global warming, hence there is a need for the use of clean, sustainable, and eco friendly form of energy. Among the various types of non-conventional energy solar energy is the fundamental as it is abundant, pollution free and universally available.Even though the main input to the PV system is the solar radiation still there are other factors which affects the efficiency of the pv module. In this paper real time experiment has been conducted to analyze the effect of various factors like irradiance, temperature, and angle of tilt, soiling, shading on the power output of the pv module. Temperature is a negative factor which reduces the efficiency of the module and can be reduced by various cooling arrangements. Presence of dust particles and shading obstructs the incident solar radiations entering the panel and the effect is seen in the iv and pv curve .For better performance solar tracking at maximum power point is suggested to improve the power output of the pv module.
Self Electricity Generation and Energy Saving By Solar Using Programmable Sys...theijes
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability.
Theoretical work submitted to the Journal should be original in its motivation or modeling structure. Empirical analysis should be based on a theoretical framework and should be capable of replication. It is expected that all materials required for replication (including computer programs and data sets) should be available upon request to the authors.
The International Journal of Engineering & Science would take much care in making your article published without much delay with your kind cooperation.
Maximizing Output Power of a Solar Panel via Combination of Sun Tracking and ...ijtsrd
Energy is the basic needs for human comforts and day to day activities. Energy is the key factor for social and economic developments in today scenario. Now a day’s global warming is the main problem of developing counties, due to the nonstop combustion of fossil fuels all over the world, creating environmental hazards and reducing conventional energy sources. This scenario is contributing to the need to search for an new renewable source of energy, which is clean and available in excess. Due to the huge impetus in the government policies on the development of solar energy, it is acting as a main alternative renewable energy source. The solar energy is popular due to easy maintenance, cleanliness, sustainability, and zero noise characteristics. Therefore, Photo Voltaic module supplying loads with and without Maximum Power Point Technique MPPT is applied in the current studies to find the best results. Since the Photovoltaic array output is known to be affected by radiation of sun and temperature, which makes is compulsory to find out an effective method to draw out maximum power from Photo Voltaic cell modules. In my work, Perturb and Observe PandO algorithm is selected because of its easy implementation Solar energy is the clean and eternal source of energy till the end of the world. In this paper main focus is how to improve the efficiency of solar based power generation .Solar energy is variable depends upon the time and the atmospheric condition and hence output of the solar cell is directly proportional to the insulation level and inversely proportional to cell temperature and also the cell never operates at maximum power. Bhoopendra Kumar Rajput | Ameen Uddin Ahmad "Maximizing Output Power of a Solar Panel via Combination of Sun Tracking and Maximum Power Point Tracking" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-6 , October 2020, URL: https://www.ijtsrd.com/papers/ijtsrd33406.pdf Paper Url: https://www.ijtsrd.com/engineering/electrical-engineering/33406/maximizing-output-power-of-a-solar-panel-via-combination-of-sun-tracking-and-maximum-power-point-tracking/bhoopendra-kumar-rajput
Impacts of the expansion in oil palm plantationCIFOR-ICRAF
This presentation uses case studies from Central Kalimantan to illustrate the impacts of expanding palm oil plantations.
Topics covered include tenure & land rights, permits, conflict, and natural disasters.
Presentation by Cheikh Mbow at the Paris COP21 side event hosted by ICRAF -Implementing INDC in data and tool scarce countries: Steps to success in Africa
CIFOR's Global Comparative Study (GCS-REDD+)CIFOR-ICRAF
Presented at a workshop on 'Sharing insights across REDD+ countries: Opportunities and obstacles for effective, efficient, and equitable REDD+ carbon and non-carbon results', held from 21-23 February 2017 in Naypyidaw, Myanmar.
Payments for Environmental Services (PES) programs in CambodiaCIFOR-ICRAF
This presentation was given on the “Regional workshop on Payment for Environmental Services” on November 20 2014 in Hanoi, Vietnam. The overall aim of the workshop was to enhance the understanding and capacity of policy makers, PES practioners, and researcher communities on the topic of payments for ecosystem services and ecosystem-based approaches and also to increase dialogue between them on latest lessons learned and recommendations for effective, efficient and equitable implementation of PES.
Forestry and landscapes: Solutions for sustainable developmentCIFOR-ICRAF
Presented by Peter Holmgren, CIFOR's Director General, at the Bogor Agricultural Institute (Institut Pertanian Bogor or IPB), Indonesia, on February 17, 2017. Part of the IPB Talks series.
Enhancement of the output power generated from a hybrid solar thermal systemeSAT Journals
Abstract This paper investigates the output power and increased the efficiency of a hybrid Photovoltaic/ Thermal (PV/T) modules through utilizing the heat generated from the surface of panels by one axial tracking of the hybrid PV/Tsystem by means of zenith angle and decreasing the heat generated from the PV modules by controlling the flow rate of the system. A comparison between theoretical and experimental work results for fixed and tracking PV/T hybrid system is presented. Comsol software package used to simulate the electromagnetic waves produced by the sun through solving Maxwell's equations in three dimensions and the sun irradiance is assumed to be Gaussian distribution across the twelve mourning hours. Beside that an experimental work is presented depending on the results conjured from the theoretical experience used in Comsol Multiphysics In the second part of the experimental work, one axial sun-tracking system is designed where the movement of a photo-voltaic module is controlled to follow the Sun’s radiation using a Data acquisition card (DAQ) unit. Finally an active cooling system is designed and conducted to cool the fixed and tracking modules at which an absorber system consists of copper pipe welded with aluminium plate is attached underneath the PV modules to allow water flowing below the modules. In addition to the above an electrical analysis for both systems are presented where I-V, P-V, power with 12 mourning hour’s and electrical efficiency. Beside that the thermal analysis for the fixed and tracking PV modules and the piping water are presented where the input, output temperatures, the total energy of heat losses and thermal efficiency are calculated. As a result, a significant enhancement in the total electrical efficiency is observed with acceptable increase in the output water temperature. Keywords: Cooling systems; DAQ; Hybrid; Comsol Multiphysics; Mat lab; Solid work; Lab view.…
Novel technique for maximizing the thermal efficiency of a hybrid pveSAT Journals
Abstract In this paper a comparison between numerical model and experimental work results for a fixed Photovoltaic/ Thermal (PV/T) hybrid system is presented. The simulation in this work is based on a numerical model in solving the equations and determining the Photovoltaic (PV) cells thermal characteristics using both MATLAB and COMSOL Multiphysics. COMSOL is simulating the electromagnetic waves produced by the Sun through solving Maxwell's equations in three dimensions using Finite Elements Methods (FEM) and the sun irradiance is assumed to be Gaussian distribution across the twelve mourning hours. Beside that an experimental work is presented depending on the results conjured from the theoretical experience used in Comsol Multiphysics. A Pulse Width Modulator (PWM) is used to control the solenoid valve operation. In addition to the above a thermal analysis for the fixed PV modules and the piping water is presented where the output water temperatures, rate of heat transfer, overall heat transfer coefficient and thermal efficiency are calculated. As a result, a significant enhancement in the total thermal efficiency is observed with acceptable increase in the output water temperature. Keywords: Cooling systems; DAQ; Hybrid; COMSOL MULTIPHYSICS; MATLAB; Solid work; Lab view.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
DESIGN, SIMULATION AND ANALYSIS OF A HYBRID-TYPE (PV/T) SOLAR AIR HEATER FOR ...ijiert bestjournal
This paper deals with the numerical analysis of a H ybrid-Type (PV/T) Solar Air Heater and a study on t he effect of various design parameters that enhance th e performance of the system. The heat transfer improvement in general may be achieved by increasin g the heat transfer coefficient or by increasing th e surface area or by increasing both. The main object ive of the present work is to determine the optimum air mass flow rate at which PV/T systems are to be oper ated and to develop an optimal design of a hybrid t ype (PV/T) solar air heater that shows better performan ce at various heat fluxes due to solar radiation. T his study determines the set of design parameters which lead to the best annual yield of the system. In th is study of a hybrid type (PV/T) solar air heater ICEM CFD (ANSYS) is used to obtain the optimum results,there by increasing the efficiency of the system.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Solar photovoltaic/thermal air collector with mirrors for optimal tiltsIJECEIAES
This work is the result of a study of a photovoltaic/thermal air collector that concentrates solar radiation using two mobile mirrors to enhance electrical and thermal energy. The study is made for the site of Tetouan (Morocco) (longitude=-5°, latitude=35.25°) for a daily variation during typical days in May, June, September, and December, days considered as clear sky. To prove the effectiveness of the mirrors on the production of both electrical and thermal energy by the collector, we compared their electrical and thermal efficiency in two cases, without and with mirrors at the optimal positions. We validate the obtained simulation results by comparing them to the results from experimental studies published in the literature, for which a strong agreement was obtained. The model estimates the solar energy received by the hybrid collector during the day, to optimize the performance of the fixed collector, we have searched for the values of the optimal daily tilt angles of the two mirrors which allowed us to enhance the quantity of incoming solar radiation on the collector. The tilt angles depend on the sun’s elevation angle, the azimuth angle for typical days of the year.
Recent technological developments in pv+thermal technology a revieweSAT Journals
Abstract Large amount of work had been carried out and going on in research and technological development of solar energy systems. Many systems have been innovated and approved as a product industrial bodies as per its market potential. Theoretical models have been developed, manufactured within specified design constraints and tested to get desired results. Many have optimized the systems using different advanced tools, some have developed software techniques like neural network, and the product developed is studied for market potential. The journey is going on in order to increase efficiency of system and compete with conventional energy prizes. This article gives an overview about the trend of solar technology development, future key areas in which researchers have to work for sustainable and efficient solar technology. Keywords: - PV/T, solar energy, efficiency of PV cells, hybrid systems.
An Investigation of the Temperature Effect on Solar Panel Efficiency Based on...ijtsrd
Sunlight is effectively transformed into electric current using photovoltaic panels. The rest of the suns spectrum is linked to harmful radiation, which increases the temperature of the photovoltaic panels and consequently decreases performance, power generation, and efficiency. This paper includes an experimental investigation to investigate the performance of a polycrystalline solar PV panel at varying temperatures. Then this study uses Internet of Things IoT technologies to examine how the efficiency of a polycrystalline solar PV panel performs at various temperatures. The K type thermocouple, an Arduino Uno, a Max6675 module, an ESP8266 ESP 01 module, the Thing Speak cloud platform, and voltage divider resistors were the components that constructed the IoT based temperature measurement system. The temperature of a polycrystalline solar panel is determined by experiments, and it may be used to determine the solar panels efficiency. The efficiency of the solar PV panel gradually decreases as the surface temperature of the panel increases. Mr. Myo Ko Ko | Dr. Ei Mon "An Investigation of the Temperature Effect on Solar Panel Efficiency Based on IoT Technology" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-8 | Issue-1 , February 2024, URL: https://www.ijtsrd.com/papers/ijtsrd61354.pdf Paper Url: https://www.ijtsrd.com/engineering/electrical-engineering/61354/an-investigation-of-the-temperature-effect-on-solar-panel-efficiency-based-on-iot-technology/mr-myo-ko-ko
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
Modeling and simulation of solar photovoltaic module using matlab simulinkeSAT Journals
Abstract
The paper presents the modeling ,simulation and implementation of the solar photovoltaic cell using MATLAB/SIMULINK .The I-V ,
P-V & I-V characteristics are obtained for (1) Single solar cell module (2) Solar PV module with variable temp.& fixed radiation (3)
Solar PV module with fixed temp.& variable radiation with M.file and mathematical model using MATLAB/SIMULINK .
Index Terms: photovoltaic module, radiation, temperature, M.file, MATLAB/SIMULINK
Similar to 3 d finite element method modeling and simulation of the temperature of crystalline photovoltaic module (20)
Mechanical properties of hybrid fiber reinforced concrete for pavementseSAT Journals
Abstract
The effect of addition of mono fibers and hybrid fibers on the mechanical properties of concrete mixture is studied in the present
investigation. Steel fibers of 1% and polypropylene fibers 0.036% were added individually to the concrete mixture as mono fibers and
then they were added together to form a hybrid fiber reinforced concrete. Mechanical properties such as compressive, split tensile and
flexural strength were determined. The results show that hybrid fibers improve the compressive strength marginally as compared to
mono fibers. Whereas, hybridization improves split tensile strength and flexural strength noticeably.
Keywords:-Hybridization, mono fibers, steel fiber, polypropylene fiber, Improvement in mechanical properties.
Material management in construction – a case studyeSAT Journals
Abstract
The objective of the present study is to understand about all the problems occurring in the company because of improper application
of material management. In construction project operation, often there is a project cost variance in terms of the material, equipments,
manpower, subcontractor, overhead cost, and general condition. Material is the main component in construction projects. Therefore,
if the material management is not properly managed it will create a project cost variance. Project cost can be controlled by taking
corrective actions towards the cost variance. Therefore a methodology is used to diagnose and evaluate the procurement process
involved in material management and launch a continuous improvement was developed and applied. A thorough study was carried
out along with study of cases, surveys and interviews to professionals involved in this area. As a result, a methodology for diagnosis
and improvement was proposed and tested in selected projects. The results obtained show that the main problem of procurement is
related to schedule delays and lack of specified quality for the project. To prevent this situation it is often necessary to dedicate
important resources like money, personnel, time, etc. To monitor and control the process. A great potential for improvement was
detected if state of the art technologies such as, electronic mail, electronic data interchange (EDI), and analysis were applied to the
procurement process. These helped to eliminate the root causes for many types of problems that were detected.
Managing drought short term strategies in semi arid regions a case studyeSAT Journals
Abstract
Drought management needs multidisciplinary action. Interdisciplinary efforts among the experts in various fields of the droughts
prone areas are helpful to achieve tangible and permanent solution for this recurring problem. The Gulbarga district having the total
area around 16, 240 sq.km, and accounts 8.45 per cent of the Karnataka state area. The district has been situated with latitude 17º 19'
60" North and longitude of 76 º 49' 60" east. The district is situated entirely on the Deccan plateau positioned at a height of 300 to
750 m above MSL. Sub-tropical, semi-arid type is one among the drought prone districts of Karnataka State. The drought
management is very important for a district like Gulbarga. In this paper various short term strategies are discussed to mitigate the
drought condition in the district.
Keywords: Drought, South-West monsoon, Semi-Arid, Rainfall, Strategies etc.
Life cycle cost analysis of overlay for an urban road in bangaloreeSAT Journals
Abstract
Pavements are subjected to severe condition of stresses and weathering effects from the day they are constructed and opened to traffic
mainly due to its fatigue behavior and environmental effects. Therefore, pavement rehabilitation is one of the most important
components of entire road systems. This paper highlights the design of concrete pavement with added mono fibers like polypropylene,
steel and hybrid fibres for a widened portion of existing concrete pavement and various overlay alternatives for an existing
bituminous pavement in an urban road in Bangalore. Along with this, Life cycle cost analyses at these sections are done by Net
Present Value (NPV) method to identify the most feasible option. The results show that though the initial cost of construction of
concrete overlay is high, over a period of time it prove to be better than the bituminous overlay considering the whole life cycle cost.
The economic analysis also indicates that, out of the three fibre options, hybrid reinforced concrete would be economical without
compromising the performance of the pavement.
Keywords: - Fatigue, Life cycle cost analysis, Net Present Value method, Overlay, Rehabilitation
Laboratory studies of dense bituminous mixes ii with reclaimed asphalt materialseSAT Journals
Abstract
The issue of growing demand on our nation’s roadways over that past couple of decades, decreasing budgetary funds, and the need to
provide a safe, efficient, and cost effective roadway system has led to a dramatic increase in the need to rehabilitate our existing
pavements and the issue of building sustainable road infrastructure in India. With these emergency of the mentioned needs and this
are today’s burning issue and has become the purpose of the study.
In the present study, the samples of existing bituminous layer materials were collected from NH-48(Devahalli to Hassan) site.The
mixtures were designed by Marshall Method as per Asphalt institute (MS-II) at 20% and 30% Reclaimed Asphalt Pavement (RAP).
RAP material was blended with virgin aggregate such that all specimens tested for the, Dense Bituminous Macadam-II (DBM-II)
gradation as per Ministry of Roads, Transport, and Highways (MoRT&H) and cost analysis were carried out to know the economics.
Laboratory results and analysis showed the use of recycled materials showed significant variability in Marshall Stability, and the
variability increased with the increase in RAP content. The saving can be realized from utilization of recycled materials as per the
methodology, the reduction in the total cost is 19%, 30%, comparing with the virgin mixes.
Keywords: Reclaimed Asphalt Pavement, Marshall Stability, MS-II, Dense Bituminous Macadam-II
Laboratory investigation of expansive soil stabilized with natural inorganic ...eSAT Journals
Abstract
Soil stabilization has proven to be one of the oldest techniques to improve the soil properties. Literature review conducted revealed
that uses of natural inorganic stabilizers are found to be one of the best options for soil stabilization. In this regard an attempt has
been made to evaluate the influence of RBI-81 stabilizer on properties of black cotton soil through laboratory investigations. Black
cotton soil with varying percentages of RBI-81 viz., 0, 0.5, 1, 1.5, 2, and 2.5 percent were studied for moisture density relationships
and strength behaviour of soils. Also the effect of curing period was evaluated as literature review clearly emphasized the strength
gain of soils stabilized with RBI-81 over a period of time. The results obtained shows that the unconfined compressive strength of
specimens treated with RBI-81 increased approximately by 250% for a curing period of 28 days as compared to virgin soil. Further
the CBR value improved approximately by 400%. The studies indicated an increasing trend for soil strength behaviour with
increasing percentage of RBI-81 suggesting its potential applications in soil stabilization.
Influence of reinforcement on the behavior of hollow concrete block masonry p...eSAT Journals
Abstract
Reinforced masonry was developed to exploit the strength potential of masonry and to solve its lack of tensile strength. Experimental
and analytical studies have been carried out to investigate the effect of reinforcement on the behavior of hollow concrete block
masonry prisms under compression and to predict ultimate failure compressive strength. In the numerical program, three dimensional
non-linear finite elements (FE) model based on the micro-modeling approach is developed for both unreinforced and reinforced
masonry prisms using ANSYS (14.5). The proposed FE model uses multi-linear stress-strain relationships to model the non-linear
behavior of hollow concrete block, mortar, and grout. Willam-Warnke’s five parameter failure theory has been adopted to model the
failure of masonry materials. The comparison of the numerical and experimental results indicates that the FE models can successfully
capture the highly nonlinear behavior of the physical specimens and accurately predict their strength and failure mechanisms.
Keywords: Structural masonry, Hollow concrete block prism, grout, Compression failure, Finite element method,
Numerical modeling.
Influence of compaction energy on soil stabilized with chemical stabilizereSAT Journals
Abstract
Increase in traffic along with heavier magnitude of wheel loads cause rapid deterioration in pavements. There is a need to improve
density, strength of soil subgrade and other pavement layers. In this study an attempt is made to improve the properties of locally
available loamy soil using twin approaches viz., i) increasing the compaction of soil and ii) treating the soil with chemical stabilizer.
Laboratory studies are carried out on both untreated and treated soil samples compacted by different compaction efforts. Studies
show that increase in compaction effort results in increase in density of soil. However in soil treated with chemical stabilizer, rate of
increase in density is not significant. The soil treated with chemical stabilizer exhibits improvement in both strength and performance
properties.
Keywords: compaction, density, subgradestabilization, resilient modulus
Geographical information system (gis) for water resources managementeSAT Journals
Abstract
Water resources projects are inherited with overlapping and at times conflicting objectives. These projects are often of varied sizes
ranging from major projects with command areas of millions of hectares to very small projects implemented at the local level. Thus,
in all these projects there is seldom proper coordination which is essential for ensuring collective sustainability.
Integrated watershed development and management is the accepted answer but in turn requires a comprehensive framework that can
enable planning process involving all the stakeholders at different levels and scales is compulsory. Such a unified hydrological
framework is essential to evaluate the cause and effect of all the proposed actions within the drainage basins.
The present paper describes a hydrological framework developed in the form of a Hydrologic Information System (HIS) which is
intended to meet the specific information needs of the various line departments of a typical State connected with water related aspects.
The HIS consist of a hydrologic information database coupled with tools for collating primary and secondary data and tools for
analyzing and visualizing the data and information. The HIS also incorporates hydrological model base for indirect assessment of
various entities of water balance in space and time. The framework would be maintained and updated to reflect fully the most
accurate ground truth data and the infrastructure requirements for planning and management.
Keywords: Hydrological Information System (HIS); WebGIS; Data Model; Web Mapping Services
Forest type mapping of bidar forest division, karnataka using geoinformatics ...eSAT Journals
Abstract
The study demonstrate the potentiality of satellite remote sensing technique for the generation of baseline information on forest types
including tree plantation details in Bidar forest division, Karnataka covering an area of 5814.60Sq.Kms. The Total Area of Bidar
forest division is 5814Sq.Kms analysis of the satellite data in the study area reveals that about 84% of the total area is Covered by
crop land, 1.778% of the area is covered by dry deciduous forest, 1.38 % of mixed plantation, which is very threatening to the
environmental stability of the forest, future plantation site has been mapped. With the use of latest Geo-informatics technology proper
and exact condition of the trees can be observed and necessary precautions can be taken for future plantation works in an appropriate
manner
Keywords:-RS, GIS, GPS, Forest Type, Tree Plantation
Factors influencing compressive strength of geopolymer concreteeSAT Journals
Abstract
To study effects of several factors on the properties of fly ash based geopolymer concrete on the compressive strength and also the
cost comparison with the normal concrete. The test variables were molarities of sodium hydroxide(NaOH) 8M,14M and 16M, ratio of
NaOH to sodium silicate (Na2SiO3) 1, 1.5, 2 and 2.5, alkaline liquid to fly ash ratio 0.35 and 0.40 and replacement of water in
Na2SiO3 solution by 10%, 20% and 30% were used in the present study. The test results indicated that the highest compressive
strength 54 MPa was observed for 16M of NaOH, ratio of NaOH to Na2SiO3 2.5 and alkaline liquid to fly ash ratio of 0.35. Lowest
compressive strength of 27 MPa was observed for 8M of NaOH, ratio of NaOH to Na2SiO3 is 1 and alkaline liquid to fly ash ratio of
0.40. Alkaline liquid to fly ash ratio of 0.35, water replacement of 10% and 30% for 8 and 16 molarity of NaOH and has resulted in
compressive strength of 36 MPa and 20 MPa respectively. Superplasticiser dosage of 2 % by weight of fly ash has given higher
strength in all cases.
Keywords: compressive strength, alkaline liquid, fly ash
Experimental investigation on circular hollow steel columns in filled with li...eSAT Journals
Abstract
Composite Circular hollow Steel tubes with and without GFRP infill for three different grades of Light weight concrete are tested for
ultimate load capacity and axial shortening , under Cyclic loading. Steel tubes are compared for different lengths, cross sections and
thickness. Specimens were tested separately after adopting Taguchi’s L9 (Latin Squares) Orthogonal array in order to save the initial
experimental cost on number of specimens and experimental duration. Analysis was carried out using ANN (Artificial Neural
Network) technique with the assistance of Mini Tab- a statistical soft tool. Comparison for predicted, experimental & ANN output is
obtained from linear regression plots. From this research study, it can be concluded that *Cross sectional area of steel tube has most
significant effect on ultimate load carrying capacity, *as length of steel tube increased- load carrying capacity decreased & *ANN
modeling predicted acceptable results. Thus ANN tool can be utilized for predicting ultimate load carrying capacity for composite
columns.
Keywords: Light weight concrete, GFRP, Artificial Neural Network, Linear Regression, Back propagation, orthogonal
Array, Latin Squares
Experimental behavior of circular hsscfrc filled steel tubular columns under ...eSAT Journals
Abstract
This paper presents an outlook on experimental behavior and a comparison with predicted formula on the behaviour of circular
concentrically loaded self-consolidating fibre reinforced concrete filled steel tube columns (HSSCFRC). Forty-five specimens were
tested. The main parameters varied in the tests are: (1) percentage of fiber (2) tube diameter or width to wall thickness ratio (D/t
from 15 to 25) (3) L/d ratio from 2.97 to 7.04 the results from these predictions were compared with the experimental data. The
experimental results) were also validated in this study.
Keywords: Self-compacting concrete; Concrete-filled steel tube; axial load behavior; Ultimate capacity.
Evaluation of punching shear in flat slabseSAT Journals
Abstract
Flat-slab construction has been widely used in construction today because of many advantages that it offers. The basic philosophy in
the design of flat slab is to consider only gravity forces; this method ignores the effect of punching shear due to unbalanced moments
at the slab column junction which is critical. An attempt has been made to generate generalized design sheets which accounts both
punching shear due to gravity loads and unbalanced moments for cases (a) interior column; (b) edge column (bending perpendicular
to shorter edge); (c) edge column (bending parallel to shorter edge); (d) corner column. These design sheets are prepared as per
codal provisions of IS 456-2000. These design sheets will be helpful in calculating the shear reinforcement to be provided at the
critical section which is ignored in many design offices. Apart from its usefulness in evaluating punching shear and the necessary
shear reinforcement, the design sheets developed will enable the designer to fix the depth of flat slab during the initial phase of the
design.
Keywords: Flat slabs, punching shear, unbalanced moment.
Evaluation of performance of intake tower dam for recent earthquake in indiaeSAT Journals
Abstract
Intake towers are typically tall, hollow, reinforced concrete structures and form entrance to reservoir outlet works. A parametric
study on dynamic behavior of circular cylindrical towers can be carried out to study the effect of depth of submergence, wall thickness
and slenderness ratio, and also effect on tower considering dynamic analysis for time history function of different soil condition and
by Goyal and Chopra accounting interaction effects of added hydrodynamic mass of surrounding and inside water in intake tower of
dam
Key words: Hydrodynamic mass, Depth of submergence, Reservoir, Time history analysis,
Evaluation of operational efficiency of urban road network using travel time ...eSAT Journals
Abstract
Efficiency of the road network system is analyzed by travel time reliability measures. The study overlooks on an important measure of
travel time reliability and prioritizing Tiruchirappalli road network. Traffic volume and travel time were collected using license plate
matching method. Travel time measures were estimated from average travel time and 95th travel time. Effect of non-motorized vehicle
on efficiency of road system was evaluated. Relation between buffer time index and traffic volume was created. Travel time model has
been developed and travel time measure was validated. Then service quality of road sections in network were graded based on
travel time reliability measures.
Keywords: Buffer Time Index (BTI); Average Travel Time (ATT); Travel Time Reliability (TTR); Buffer Time (BT).
Estimation of surface runoff in nallur amanikere watershed using scs cn methodeSAT Journals
Abstract
The development of watershed aims at productive utilization of all the available natural resources in the entire area extending from
ridge line to stream outlet. The per capita availability of land for cultivation has been decreasing over the years. Therefore, water and
the related land resources must be developed, utilized and managed in an integrated and comprehensive manner. Remote sensing and
GIS techniques are being increasingly used for planning, management and development of natural resources. The study area, Nallur
Amanikere watershed geographically lies between 110 38’ and 110 52’ N latitude and 760 30’ and 760 50’ E longitude with an area of
415.68 Sq. km. The thematic layers such as land use/land cover and soil maps were derived from remotely sensed data and overlayed
through ArcGIS software to assign the curve number on polygon wise. The daily rainfall data of six rain gauge stations in and around
the watershed (2001-2011) was used to estimate the daily runoff from the watershed using Soil Conservation Service - Curve Number
(SCS-CN) method. The runoff estimated from the SCS-CN model was then used to know the variation of runoff potential with different
land use/land cover and with different soil conditions.
Keywords: Watershed, Nallur watershed, Surface runoff, Rainfall-Runoff, SCS-CN, Remote Sensing, GIS.
Estimation of morphometric parameters and runoff using rs & gis techniqueseSAT Journals
Abstract
Land and water are the two vital natural resources, the optimal management of these resources with minimum adverse environmental
impact are essential not only for sustainable development but also for human survival. Satellite remote sensing with geographic
information system has a pragmatic approach to map and generate spatial input layers of predicting response behavior and yield of
watershed. Hence, in the present study an attempt has been made to understand the hydrological process of the catchment at the
watershed level by drawing the inferences from moprhometric analysis and runoff. The study area chosen for the present study is
Yagachi catchment situated in Chickamaglur and Hassan district lies geographically at a longitude 75⁰52’08.77”E and
13⁰10’50.77”N latitude. It covers an area of 559.493 Sq.km. Morphometric analysis is carried out to estimate morphometric
parameters at Micro-watershed to understand the hydrological response of the catchment at the Micro-watershed level. Daily runoff
is estimated using USDA SCS curve number model for a period of 10 years from 2001 to 2010. The rainfall runoff relationship of the
study shows there is a positive correlation.
Keywords: morphometric analysis, runoff, remote sensing and GIS, SCS - method
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Effect of variation of plastic hinge length on the results of non linear anal...eSAT Journals
Abstract The nonlinear Static procedure also well known as pushover analysis is method where in monotonically increasing loads are applied to the structure till the structure is unable to resist any further load. It is a popular tool for seismic performance evaluation of existing and new structures. In literature lot of research has been carried out on conventional pushover analysis and after knowing deficiency efforts have been made to improve it. But actual test results to verify the analytically obtained pushover results are rarely available. It has been found that some amount of variation is always expected to exist in seismic demand prediction of pushover analysis. Initial study is carried out by considering user defined hinge properties and default hinge length. Attempt is being made to assess the variation of pushover analysis results by considering user defined hinge properties and various hinge length formulations available in literature and results compared with experimentally obtained results based on test carried out on a G+2 storied RCC framed structure. For the present study two geometric models viz bare frame and rigid frame model is considered and it is found that the results of pushover analysis are very sensitive to geometric model and hinge length adopted. Keywords: Pushover analysis, Base shear, Displacement, hinge length, moment curvature analysis
Effect of use of recycled materials on indirect tensile strength of asphalt c...eSAT Journals
Abstract
Depletion of natural resources and aggregate quarries for the road construction is a serious problem to procure materials. Hence
recycling or reuse of material is beneficial. On emphasizing development in sustainable construction in the present era, recycling of
asphalt pavements is one of the effective and proven rehabilitation processes. For the laboratory investigations reclaimed asphalt
pavement (RAP) from NH-4 and crumb rubber modified binder (CRMB-55) was used. Foundry waste was used as a replacement to
conventional filler. Laboratory tests were conducted on asphalt concrete mixes with 30, 40, 50, and 60 percent replacement with RAP.
These test results were compared with conventional mixes and asphalt concrete mixes with complete binder extracted RAP
aggregates. Mix design was carried out by Marshall Method. The Marshall Tests indicated highest stability values for asphalt
concrete (AC) mixes with 60% RAP. The optimum binder content (OBC) decreased with increased in RAP in AC mixes. The Indirect
Tensile Strength (ITS) for AC mixes with RAP also was found to be higher when compared to conventional AC mixes at 300C.
Keywords: Reclaimed asphalt pavement, Foundry waste, Recycling, Marshall Stability, Indirect tensile strength.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
For more technical information, visit our website https://intellaparts.com
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
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Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
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More examples of our work https://www.r-r-consult.dk/en/cases-en/
Democratizing Fuzzing at Scale by Abhishek Aryaabh.arya
Presented at NUS: Fuzzing and Software Security Summer School 2024
This keynote talks about the democratization of fuzzing at scale, highlighting the collaboration between open source communities, academia, and industry to advance the field of fuzzing. It delves into the history of fuzzing, the development of scalable fuzzing platforms, and the empowerment of community-driven research. The talk will further discuss recent advancements leveraging AI/ML and offer insights into the future evolution of the fuzzing landscape.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
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Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
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The proposed project is developed to manage the automobile in the automobile dealer company. The main module in this project is login, automobile management, customer management, sales, complaints and reports. The first module is the login. The automobile showroom owner should login to the project for usage. The username and password are verified and if it is correct, next form opens. If the username and password are not correct, it shows the error message.
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When the automobile is sold to the customer, stock will be reduced automatically. When a new purchase is made, stock will be increased automatically. While selecting automobiles for sale, the proposed software will automatically check for total number of available stock of that particular item, if the total stock of that particular item is less than 5, software will notify the user to purchase the particular item.
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3 d finite element method modeling and simulation of the temperature of crystalline photovoltaic module
1. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 04 Issue: 09 | September-2015, Available @ http://www.ijret.org 378
3D FINITE ELEMENT METHOD MODELING AND SIMULATION OF
THE TEMPERATURE OF CRYSTALLINE PHOTOVOLTAIC MODULE
Nyanor Peter1
, Oman Emmanuel Kabu2
, Kudadze Stephen3
, Deku Anthony4
1
Lecturer, Mechanical Engineering Department, Accra Polytechnics, Accra, Ghana
2
Senior Lecturer, Mechanical Engineering Department, Accra Polytechnics, Accra, Ghana
3
Senior Lecturer, Mechanical Engineering Department, Accra Polytechnics, Accra, Ghana
4
Lecturer, Mechanical Engineering Department, Accra Polytechnics, Accra, Ghana
Abstract
The temperature reached by solar cells/modules during operation has been simulated to have information about the temperature
distribution in the solar cell/module. A finite element (FE) model of the solar cell/module was created in COMSOL Multiphysics
environment. The simulations enable visualization of the temperature distribution in crystalline silicon solar cell. The effect of
different encapsulating materials, Ethylene-vinyl Acetate (EVA) and silicone on cell temperature are also investigated. An
unwanted side-effect of the encapsulation of solar cells into a PV module is that the encapsulation alters the heat flow into and out
of the PV module, thereby increasing the operating temperature of the PV module. These increases in temperature have a major
impact on the PV module by reducing its voltage, thereby lowering the output power. A finite element (FE) model representing a
real crystalline silicon solar cell/module in terms of size, mechanical and material properties is created. An in-depth study of the
FE software used, COMSOL Multiphysics is done in other to get the best output in terms of solver configuration and memory
considerations. Four different geometries of the solar cell/module are created for these simulations; each representing a stage or
variant in the solar module assembly. At first, the models are validated comparing results from simulations such as the effect of
changes in solar irradiance, wind velocity and incident angle of solar irradiance on temperature with those in literature. The
effect of the type of protective cover used in the encapsulation, either glass-glass or glass-Tedlar on cell temperature is analyzed.
The thickness of the protective cover layers and its optical properties are also investigated based on their effects on cell/module
temperature. All the simulations leading to the conclusions drawn about the cell/module temperature and its distribution were
performed by varying wind velocity, irradiance, material sizes and incident angle among other model modifications. The color
maps and graphs are presented in this study.
Key Words: Modeling, COMSOL Multipysics, Crystalline silicon solar cell/module, FE simulations, Temperature
--------------------------------------------------------------------***----------------------------------------------------------------------
1. INTRODUCTION
Solar energy provides a great potential as a renewable
energy source. It is constantly improving and becoming a
competitive energy source for the future. Recently, there has
been an enormous increase in the understanding of the
principle of operation of photovoltaic devices, which led to
a rapid increase in the power conversion efficiencies of such
devices. New methods of harnessing the full spectrum of the
sun’s wavelength and new materials for making solar cells
are paving way for solar power to be the emerging power
resource for the world at large.
A photovoltaic (PV) module exposed to sunlight generates
heat as well as electricity. For a typical commercial PV
module operating at its maximum power point, only 15 to
20% of the incident sunlight is converted into electricity [1],
with much of the remainder being converted into heat. In
dealing with solar module efficiency, one important effect to
consider is the temperature of the module. According to the
theory, the output power of a crystalline solar cell decreases
by 0.4% when the temperature increase is equal to 1°C
above the optimum operating temperature [2]. Thus a
thorough understanding of the sources, distribution and
values of temperature reached in operation by the solar
module is of utmost importance. In addition, increases in
temperature are implicated in several failure or degradation
modes of PV modules, as elevated temperatures increase
stresses associated with thermal expansion and also increase
degradation rates by a factor of about two for each 10°C
increase in temperature [1].
Solar cells are made from semiconductor materials that turn
sunlight into electricity. This effect was first recorded by E.
Becquerel, in 1839 [3]. In 1877 the first solid state device
was recorded to show such an effect. However, it was in
1954 at Bell Labs when the solar electric effect was
demonstrated in silicon (Si) that the idea of producing
useable amounts of electricity from solar cells began.
2. TEMPERATURE MODEL OF SOLAR
CELL/MODULE IMPLEMENTED IN COMSOL
MULTIPHYSICS ENVIRONMENT
To simulate the solar cell/module operating temperature, a
model of the solar cell/module is created in COMSOL
Multiphysics. The geometry needed for each simulation is
created, the material properties are defined based on values
2. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
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Volume: 04 Issue: 09 | September-2015, Available @ http://www.ijret.org 379
from the COMSOL materials library and literature.
2.1 Creating the geometry
To simulate the solar cell/module operating temperature, a
model of the solar cell/module is created in COMSOL
Multiphysics. The geometry needed for each simulation is
created, the material properties are defined based on values
from the COMSOL materials library and literature
2.1.1 Model A: Solar Cell Consisting Of Silicon,
Aluminum, Busbars And Fingers
Model A Is A 12.5 Cm X 12.5 cm solar cell consisting of
the following layers from bottom to top: aluminum, silicon,
busbars and fingers. The busbars and fingers are made of
silver. This represents the basic components of the solar cell
without the encapsulation and protective cover. The
components and its arrangement are shown in Fig -1. The
silicon is 300 µm thick, aluminum is 30 µm thick and the
busbars and fingers are 18 µm thick. The bus bars are 1.5
mm wide whiles the fingers are 250 µm wide. There are two
busbars and 30 fingers on the silicon surfaces. The fingers
are the smallest in size and thus determine to a large extent
the mesh size. The percentage coverage of the fingers on
silicon surface of a solar cell is typically estimated to be
between 7 and 9%. The number of fingers was selected to be
as close to reality (percentage coverage range) as possible
and reduce computational cost to a minimum.
Fig -1: Model A - Solar cell consisting of silicon,
aluminum, busbars and fingers
2.1.2 Model B: Solar cell made up of Model A,
Glass, EVA and Tedlar
Model B is made up of Model A described in 2.1.1,
laminated with a 450 µm thick Ethylene-vinyl Acetate
(EVA) on both sides, a protective solar glass 3.2 mm thick
on the upper side and 500 µm thick Tedlar protecting the
back side. The layers are arranged as shown in Fig -2. The
basic cell part (Model A) has the same configuration and is
revealed in a transparent view (a view with glass, EVA and
Tedlar shown as transparent) in Fig -3.
Fig -2: Model B - Solar cell made up of Model A, Glass,
EVA and Tedlar
Fig -3: Transparent view of Model B revealing busbars and
fingers arrangement.
Model B was used in the simulation to analyze the
additional effect of encapsulation materials (Glass, EVA and
Tedlar) on the cell temperature. The laminating material
EVA is replaced by silicone, another laminating material, to
ascertain if the increase in efficiency of the silicone
laminated modules affects the cell operating temperature.
2.1.3 Model C: Solar cell made up of Model A,
glass, EVA
Model C is made up of the same base as Model B but in this
model, the protective back of Tedlar is substituted by glass.
This model has top and bottom glass protective cover. Each
glass layer is 3.2 mm thick.
The model is used to simulate the effect of having glass on
both sides on cell temperature as compared to Tedlar on the
back side. This model is shown both in 3D and as a
transparent structure in Fig -4 and Fig -5, respectively.
Fig -4: Model C: Solar cell made up of Model A, glass,
EVA
3. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
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Volume: 04 Issue: 09 | September-2015, Available @ http://www.ijret.org 380
Fig -5: Transparent view of Model C revealing busbars and
fingers
2.1.4 Model D: Solar Module Made Up Of Two of
Model B With Copper Interconnection
Model D is a two cell mini solar module. To conserve
cumputer memory during computation and to take
advantage of the symmetric nature of the geometry, only a
quarter of each cell is used. The cells have the same
structure and composition as the cell in Model B. The two
quarter cells are connected with a copper stripe. The two
cells are placed 7 mm apart and encapsulated with glass,
EVA and Tedlar as in Model B. The entire space around the
interconnecting copper stripe is filled with EVA. The 3D
view as well as the transparent view of the model is shown
in Fig -6 and Fig -7 respectively. The copper stripe is
modeled here as a straight bar due to memory
considerations. A symmetry boundary condition is defined
on three sides of the mini module to form a complete two-
cell module.
Fig -6: Model D: Solar module made up of two of Model B
with copper interconnection
Fig -7: Transparent view of Model D showing the two cells
and copper interconnections.
Model D is used for the simulation of the temperature
distribution in the EVA surrounding the copper
interconnections, the effect of copper on cell/module
temperature as well as the effect of the distance between
adjacent cells on temperature.
2.2 Definition Of Material Properties
The material properties were taken from literature as well as
from the COMSOL material library. The following
materials are used in the modeling: glass, EVA, silicone,
silver, silicon, aluminum, Tedlar and copper.
Table -1: Sample material properties table [5] [6] [7] [8]
Material
Property
[Unit]
Glass
EVA
Silver
Silicon
Aluminum
Density
[kg/m3
]
2200 935 10500 2329.1 2700
Thermal
conductivity
[W/(m.K)]
1.1 0.34 429 163 210
Heat
capacity at
constant
pressure
[J/(kg.K)]
480 480 235 0.703 900
Electrical
conductivity
[S/m]
1e-
14
* 6.16e7 1e-12 3.5e7
Relative
permittivity
4.2 * 11.7 11.7 10
Refractive
index
1.5 1.5 * 3.45 *
Emissivity * * 0.01 0.84 *
*Value not relevant for the simulation
2.3 Physics selection and boundary conditions
The physics selection determines what parameters are
solved for and the physical boundaries of the simulation.
Two physics interfaces, joule heating and heat transfer in
solids with surface-to-surface radiation and radiation in
participating media activated are used in the simulation in
this study. COMSOL allows for the full coupling of the
different physics interfaces. The physical boundaries are
also defined for each simulation according to real values and
conditions.
4. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
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Volume: 04 Issue: 09 | September-2015, Available @ http://www.ijret.org 381
2.4 Meshing
The structured mesh type “swept mesh” is used in meshing
all the models. The swept mesher operates on a 3D domain
by meshing a source face. The source face is meshed with
free triangular elements and then the resulting face mesh is
swept along the domain to an opposite destination face. A
swept mesh is structured in the sweep direction and can be
either structured or unstructured orthogonally to the sweep
direction
The mesh size is chosen from one of the predefined mesh
sizes under general physics. The predefined sizes start from
extremely coarse mesh size to extremely fine mesh size. The
model is meshed with coarse size mesh. The mesh is made
finer at the narrow regions like in the finger, busbar areas
and edges and much coarser in the wider regions as shown
in Fig -8.
Fig -8: Fine mesh at narrow regions and edges
2.5 Simulation approach
The models for the simulations were created as explained in
detail in 2.1.1 to 2.1.4. First of all, the models are verified
incorporating standard (common) operating conditions
where the outcome can be speculated based on literature and
experience. Once the initial model was verified to be
working properly, further modifications are made to
investigate material and atmospheric conditions
dependencies.
The simulations are done at the Normal Operating Cell
Temperature (NOCT), which is defined as the temperature
reached by open circuited cells in a module under the
following conditions:
Irradiance on cell surface = 800 W/m2
Ambient air temperature = 20°C
Wind velocity = 1 m/s
Mounting = open back side.
The segregated solver makes it possible to split the solution
process into substeps. Each substep uses a damped version
of Newton’s method. It can be used for both stationary and
time dependent solvers. Each subset can have its own solver
settings. This solver is made use in simulations of Models B
through D in combination with a direct solver PARDISO.
The order in which the segregated steps run can be changed.
3. RESULTS AND DISCUSSION
3.1 Combined effect of Joule heating and solar
irradiance on temperature
COMSOL Multiphysics allows for the metaphysical
analysis of modeled systems. The temperature characteristic
of the solar cell is dominated by both solar irradiance and
Joule heating. These physical effects can be modeled
individually and as a combined effect. Table -2 shows the
temperature difference in the case of applying solar
irradiance only, Joule heating effect only and the
combination of both, at the NOCT conditions. The
simulations demonstrate that the Joule heating effect
produces a small heating of the cell with respect to solar
irradiance, as expected. The values of the third column of
Table -2 affirm that the modeled solar cell shows a quasi-
linear behavior (superposition effect of the two physical
effects). The combined effect leads to a slight lower
temperature increase as the discrete addition of both effects
due to the dependence of heat transfer coefficient on
temperature difference. The simple addition of the
simulation outcome from individual application of the two
physical effects is slightly higher than that from the
combined effect simulation. The simple addition of the two
physical effects is as shown in Chart -1 by a green line and it
is the addition of the blue and magenta lines. The wind
speed is varied over a range for each of the three cases and
the results are shown in Chart -1. This behavior is also
reported in [9].
Table -2: NOCT results of the solar cell under the three
cases (irradiance, Joule heating and a combination of both).
Ta = Ambient Temperature, Tc = Max. Cell Temperature,
ΔT = Temperature difference
Ta (°C) Tc
(°C)
ΔT (°C)
Solar irradiance 20 44.102 24.102
Joule heating effect 20 22.74 2.74
Solar irradiance
and Joule heating
effect
20 46.05 26.05
The confirmation of the existence of the relationship
between the individual physical effects applied alone and as
a combine effect lead to the decision to simulate in most
cases the irradiance physical effect only. This was done
Finer mesh
5. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
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Volume: 04 Issue: 09 | September-2015, Available @ http://www.ijret.org 382
because of memory constraints and computational cost. The
Joule heating effect is constant for a given current density
and its effect on overall cell/module temperature is proven
to be minimal.
Due to the accumulation of the generated current in one
direction to be connected to external load or the adjacent
cell, there is more current in the busbar towards one end and
that end turns to heat up more. The surface temperature
color maps belonging to the three cases reported in Table -2
is shown in Fig -10. This also highlights the current
accumulation effect in the Joule heating model.
0 1 2 3
0
2
4
6
16
18
20
22
24
26
28
30
32
34
TemperatureDifference(Tc
-Ta
)[°C]
Wind Velocity [m/s]
Joule Heating & Irradiance (simulated)
Irradiance only
Joule Heating only
Irradiance + Joule heating
Chart -1: Superposition effect of solar irradiance and Joule
heating. The Joule heating effect causes temperature
difference across the cell. The average cell temperature is
plotted and the error bars used to show the deviation from
maximum and minimum temperatures.
Fig -10: Temperature map of combined effect of Joule
heating and solar irradiance
3.2 Effect of Encapsulation Material On Cell
Temperature
Chart -2 shows the temperature of the cell without
encapsulation plotted with the ones encapsulated with EVA
and silicone. The cell was subject to a solar irradiance of
800 W/m2
and the wind velocity on both sides varied from 0
m/s to 3 m/s. There is a clear rise in the temperature due to
encapsulation but not a significant difference when the EVA
or silicone is used.
0 1 2 3
18
20
22
24
26
28
30
32
TemperatureDifference(Tc
-Ta
)[°C]
Wind Velocity [m/s]
Cell encapsulated with EVA
Cell encapsulated with silicone
cell without encapsulation
Chart -2: Effect of encapsulating materials EVA and
silicone on cell temperature
The color map for the NOCT condition using EVA as the
encapsulating material is also given in Fig -11. The module
has the highest temperature at the cell and the lowest at the
top of the protective glass cover. The temperature difference
between cell and glass surface is about 1°C in all
simulations.
Fig -11: Surface temperature map of EVA encapsulated
solar cell at NOCT conditions
3.3 Effect of Copper Interconnection On Module
Temperature
In forming a module, two or more solar cells are placed
approximately 7 mm apart in series, electrically connected
with copper ribbons and then encapsulated. The modeling of
a solar module is given in 2.1.4 as Model D. This mini
module was simulated using the same conditions of 800
W/m2
irradiance, 20°C ambient temperature and the wind
velocity varying from 0 m/s to 3 m/s as was used for Model
6. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
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Volume: 04 Issue: 09 | September-2015, Available @ http://www.ijret.org 383
B. The result from 3.2 is presented here in Chart -3 to
include the result of simulating the mini module with copper
ribbon interconnection. The resulting plot shows that,
connecting solar cells with copper ribbons and encapsulating
it into a module actually decreases the cell temperature.
Even though the cell temperature is still above that of the
cell without encapsulation the decrease in cell temperature
of the mini module is significant as can be seen in Chart -3.
0 1 2 3
18
20
22
24
26
28
30
32
TemperatureDifference(Tc
-Ta
)[°C]
Wind velocity [m/s]
cell encapsulated with EVA
cell encapsulated with silicone
cell without encapsulation
mini module with Cu interconnector
Chart-3: Reduction in cell temperature in the mini module
compared to a single cell
Copper being a good conductor absorbs more heat. The
copper ribbon interconnections are totally surrounded by
EVA which turns to conduct most of the heat away from the
copper interconnections. Therefore, the copper
interconnections do not show any strong contribution in
terms of raising the cell temperature. The region of the mini
module where the gap between the two adjacent cells and
the copper interconnection is located turns out to have the
lowest temperature. The distribution of the temperature in
this area and that in the EVA filling the area around the
copper ribbon interconnections is best seen in a 2D
isosurface temperature map shown in Fig -12.
Fig -12: 2D Isosurface temperature map showing the
temperature distribution in the mini module and around the
copper stripe
3. CONCLUSIONS
In this study, the temperature reached by solar cells/modules
during operation and also information about the temperature
distribution in the solar cell/module is provided by utilizing
a finite element (FE) model of the solar cell/module which
has been created in COMSOL Multiphysics environment.
Four different geometries (models) of the solar cell/module
were created for these simulations; each represented a stage
in the solar module manufacture or a variant.
The models have been verified by checking for the variation
in temperature due to changes in solar irradiance, wind
speed and solar irradiance angle of incident. They showed
good conformance with the values from literature and
experience.
Two major contributors as source of heat for the solar
module have been identified as solar irradiance and Joule’s
heating effect. Joule’s heating effect contributes much less
compared to solar irradiance and the two effects are shown
to have quasi-linear behavior when simulated together. This
allowed for the dropping of the Joule heating effect in the
more complex simulation where memory usage was of
concern. The cell/module temperature maps obtained are
corrected with that from the Joule heating only simulation
which is constant for a given current density.
The subject of encapsulation has been shown to be very
important for the life time of the cell and its electrical parts.
The encapsulants used to protect the solar cell are
responsible for about 11% increase in the cell temperature at
NOCT conditions. EVA and silicone are the most used
encapsulants with silicone giving the highest efficiency due
to its low absorptivity compared to EVA but is more
expensive. There was negligibly small increase in
temperature of silicone encapsulated cells compared with
those with EVA.
Protecting the front of the solar module with glass and the
rear with Tedlar compared to protecting it on both sides with
glass revealed no significant change in temperature. Solar
modules protected by glass on both sides have a slightly
higher temperature due to the thickness of the glass used.
The thickness of glass used in a module is not much of
thermal concern but more of structural.
Two or more cells electrically connected together via copper
ribbons and encapsulated into a module has been simulated
to have a lower temperature than a single cell module due to
the distance between the adjacent cells and the copper
ribbon interconnection not contributing to an increase in cell
temperature. The temperature in the module increases
beginning from the middle of the mini module where the
copper ribbons surrounded by EVA are. The temperature
increases towards the edges of the module in the horizontal
plane but the solar cell itself has a uniform temperature
distribution, though with a lower average temperature.
Position of Copper ribbon interconnection
7. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
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Volume: 04 Issue: 09 | September-2015, Available @ http://www.ijret.org 384
REFERENCES
[1]. C. Honsberg and S. Bowden, "Module Materials,"
http://www.pveducation.org/pvcdrom/modules/module
-materials
[2]. T. Hausler and H. Rogass, " Latent heat storage on
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Solar Energy Conference, , Glasgow, UK, 2000:2265–
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[3]. Vignola, "Solar Cells," University of Oregon Solar
Radiation Monitering Lab, 2000.
[4]. National Renewable Energy Lab, "Spectrum Definition
for information, data and resources for solar".
[5]. AZoM.com, "Silicone Rubber material,"
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