This document describes a study that investigated the effect of angle orientation of flat mirror concentrators on the output of a solar panel system. A theoretical model was designed using Zemax software to determine the best inclination angle. The maximum efficiency of 59.5% was found at an angle of 60 degrees. A practical solar panel system was then constructed with two flat glass mirrors as concentrators. Outdoor measurements showed that efficiency and output power increased with the concentrator angle, reaching maximum values of 0.85 efficiency and 72.8 watts of power at an angle of 60 degrees.
A Study of Shading Effect on Photovoltaic Modules with Proposed P&O Checking ...Yayah Zakaria
Sun irradiation levels and associated temperature changes are the main factors that influence the conversion of solar energy into electricity. Most energy is produced during a hot sunny day as the sun irradiation is at the maximum level and uniform throughout the solar photovoltaic (PV). However, most solar PV were frequently get shadowed, completely or partially, by the neighbouring buildings, trees and passing clouds. Consequently, the solar PV has lower voltage and current output, hence,
multiple maximum power points (MPP) are existed on the PV curve, which could cause confusion to the conventional Maximum Power Point Tracker (MPPT) to track the true MPP for the PV system. Thus, it is important to examine the impacts of partial shading on the solar PV in order to extract the maximum possible power. This paper presents a MATLAB-based modelling for simulation and experimental setup to study the I-V and P-V characteristics of a solar module under a non-uniform irradiation due to partial shading condition (PSC). Furthermore, this study is also proposed an effective method (a variable step size of P&O with checking algorithm) that is low cost and higher tracking efficiency. Thus, this study is essential in improving and evaluating any new MPPT algorithm under the PSC.
Modeling Combined Effect of Temperature, Irradiance, Series Resistance (Rs) a...IJLT EMAS
In this project a single solar cell performance is analysis with change in the various electrical and mechanical parameters. The open circuit voltage and short circuit current (I-V) and P-V of solar cell is varies with the influence electrical and mechanical parameters. In this project we analysis the solar cell with the following parameter such as temperature, irradiance and series resistance (R s) and shunt resistor (R sh). The analysis is done separate and combined effect of temperature and irradiance with series and shunt resistor. The single solar cell model is done by MATLAB-Simulink tool and the output under change in various parameters is verified.
A Study of Shading Effect on Photovoltaic Modules with Proposed P&O Checking ...Yayah Zakaria
Sun irradiation levels and associated temperature changes are the main factors that influence the conversion of solar energy into electricity. Most energy is produced during a hot sunny day as the sun irradiation is at the maximum level and uniform throughout the solar photovoltaic (PV). However, most solar PV were frequently get shadowed, completely or partially, by the neighbouring buildings, trees and passing clouds. Consequently, the solar PV has lower voltage and current output, hence,
multiple maximum power points (MPP) are existed on the PV curve, which could cause confusion to the conventional Maximum Power Point Tracker (MPPT) to track the true MPP for the PV system. Thus, it is important to examine the impacts of partial shading on the solar PV in order to extract the maximum possible power. This paper presents a MATLAB-based modelling for simulation and experimental setup to study the I-V and P-V characteristics of a solar module under a non-uniform irradiation due to partial shading condition (PSC). Furthermore, this study is also proposed an effective method (a variable step size of P&O with checking algorithm) that is low cost and higher tracking efficiency. Thus, this study is essential in improving and evaluating any new MPPT algorithm under the PSC.
Modeling Combined Effect of Temperature, Irradiance, Series Resistance (Rs) a...IJLT EMAS
In this project a single solar cell performance is analysis with change in the various electrical and mechanical parameters. The open circuit voltage and short circuit current (I-V) and P-V of solar cell is varies with the influence electrical and mechanical parameters. In this project we analysis the solar cell with the following parameter such as temperature, irradiance and series resistance (R s) and shunt resistor (R sh). The analysis is done separate and combined effect of temperature and irradiance with series and shunt resistor. The single solar cell model is done by MATLAB-Simulink tool and the output under change in various parameters is verified.
Power output from a small solar panel can be affected by its power consumption when it consumes power from the solar panel. There has been a lack of proper research and experiment in the use of small solar panel with tracking systems. Its significance was detailed in this paper where the voltage output are compared with those which were externally powered. The solar trackers and a microcontroller have been designed and fabricated for this research. Due to the use of the tracking system (single axis and dual axis), the power consumption varies from one to another and its effect on the voltage output. Several experiments have been conducted and it was concluded that small solar panels are not efficient enough to utilize with tracking capabilities due to an increase in power consumption. The externally powered system was found to generate 18% more output compared to a selfsustaining system and that the increase in average power consumptions compared to a fixed panel were 31.7% and 82.5% for single-axis and dualaxis tracker respectively. A concrete evidence was made that utilizing solar tracking capabilities for low power rated solar panel is unfeasible.
This project is based on Construction and connection of photovoltaic module and related theories about it. To utilize maximum energy from the photovoltaic cell first of all understanding of it characteristics is very important because of this in starting of project we done proper study on characteristics of photo voltaic module and maximum power point. After got proper understanding of characteristics we try to use output of photo voltaic cell efficiently with help of Maximum power point tracker and cuk converter.
A solar cell, or photovoltaic cell, is an electrical device that converts the energy of light directly into electricity by the photovoltaic effect, which is a physical and chemical phenomenon. It is a form of photoelectric cell, defined as a device whose electrical characteristics, such as current, voltage, or resistance, vary when exposed to light. Individual solar cell devices are often the electrical building blocks of photovoltaic modules, known colloquially as solar panels. The common single junction silicon solar cell can produce a maximum open-circuit voltage of approximately 0.5 to 0.6 volts. Solar cells are described as being photovoltaic, irrespective of whether the source is sunlight or an artificial light. In addition to producing energy, they can be used as a photodetector (for example infrared detectors), detecting light or other electromagnetic radiation near the visible range, or measuring light intensity. The operation of a photovoltaic (PV) cell requires three basic attributes: The absorption of light, generating either electron-hole pairs or excitons.The separation of charge carriers of opposite types.The separate extraction of those carriers to an external circuit. In contrast, a solar thermal collector supplies heat by absorbing sunlight, for the purpose of either direct heating or indirect electrical power generation from heat. A "photoelectrolytic cell" (photoelectrochemical cell), on the other hand, refers either to a type of photovoltaic cell (like that developed by Edmond Becquerel and modern dye-sensitized solar cells), or to a device that splits water directly into hydrogen and oxygen using only solar illumination.
The Short and Long Term Peace Strategies: "Anglophone" Crisis, Cameroonijtsrd
Just like in Ethiopia, the unrest in the Republic of Cameroon is rooted in the countrys history, which dates back to many years. This paper seeks to analyze the institutional and attitudinal elements on the way forward for the restoration to normalcy of the state of affairs within the national territory. It is not a recipe for apportioning blames but of principles and options to a pacific settlement of disputes within the national territory. Maxwell N. Achu ""The Short and Long Term Peace Strategies: “Anglophone†Crisis, Cameroon"" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-3 , April 2019, URL: https://www.ijtsrd.com/papers/ijtsrd23512.pdf
Paper URL: https://www.ijtsrd.com/humanities-and-the-arts/other/23512/the-short-and-long-term-peace-strategies-%C3%A2%E2%82%AC%C5%93anglophone-crisis-cameroon/maxwell-n-achu
This work presents a hybrid soft-computing methodology approach for intelligent maximum power point tracking (MPPT) techniques of a photovoltaic (PV) system under any expected operating conditions using artificial neural network-fuzzy (neuro-fuzzy). The proposed technique predicts the calculation of the duty cycle ensuring optimal power transfer between the PV generator and the load. The neuro-fuzzy hybrid method combines artificial neural network (ANN) to direct the controller to the region where the MPP is located with its reference voltage estimator and its block of neural order. After that, the fuzzy logic controller (FLC) with rule inference begins to establish the photovoltaic solar system at the MPP. The obtained simulation results using MATLAB/simulink software for the proposed approach compared to ANN and the perturb and observe (P&O), proved that neuro-fuzzy approach fulfilled to extract the optimum power with pertinence, efficiency and precision.
This paper investigates the performances of different photovoltaic (PV) array under several shading condition. Four types of photovoltaic array configuration scheme which are ‘Series’ (S), Series-Parallel’ (SP), Total-Cross-Tied’ (TCT), and ‘Bridge-Link’ (BL) array topologies were tested by applying a 6x6 PV array under 6 different shading scenarios. The modeling is developed using Matlab/Simulink. The performances and output characteristics of photovoltaic array are compared and analyzed. System engineer can use the detailed characteristics of different array configuration to approximate the outcome power and pick the best configuration of the system by concerning the current natural condition to enhance the overall efficiency.
A single stage photo voltaic grid-connected inverter using spwmSHAIK AMANULLA
A Single-stage PhotoVoltaic Grid-Connected Inverter using SPWM. It was simulated and modeled with MATLAB/SIMULINK. It was simulated with constant and variable irradiation profiles. I got the results with variations in PV characteristics with different irradiation with SPWM technique.
Design of Dual Axis Solar Tracker System Based on Fuzzy Inference Systems ijscai
Electric power is a basic need in today’s life. Due to the extensive usage of power, there is a need to look
for an alternate clean energy source. Recently many researchers have focused on the solar energy as a
reliable alternative power source. Photovoltaic panels are used to collect sun radiation and convert it into
electrical energy. Most of the photovoltaic panels are deployed in a fixed position, they are inefficient as
they are fixed only at a specific angle. The efficiency of photovoltaic systems can be considerably increased
with an ability to change the panels angel according to the sun position. The main goal of such systems is
to make the sun radiation perpendicular to the photovoltaic panels as much as possible all the day times.
This paper presents a dual axis design for a fuzzy inference approach-based solar tracking system. The
system is modeled using Mamdani fuzzy logic model and the different combinations of ANFIS modeling.
Models are compared in terms of the correlation between the actual testing data output and their
corresponding forecasted output. The Mean Absolute Percent Error and Mean Percentage Error are used
to measure the models error size. In order to measure the effectiveness of the proposed models, we
compare the output power produced by a fixed photovoltaic panels with the output which would be
produced if the dual-axis panels are used. Results show that dual-axis solar tracker system will produce
22% more power than a fixed panels system.
KEYWORDS
Fuzzy, Membership function, Universe of discourse, PV, ANFIS, DC motor, FLC.
1. INTRODUCTION
Fuzzy logic can be viewed as an extension of classical logical
Modeling and Simulation of Solar Photovoltaic module using Matlab/SimulinkIOSR Journals
Abstract: This paper presents the circuit model of photovoltaic (PV) module. Simulation and modeling is done
using MATLAB/ Simulink software package. The proposed model is user friendly and can be used as a common
platform for both applied physics scientist and power electronics engineers. A detailed modeling procedure is
presented. The designed model is verified by using STP255-20/Wd PV module. The IV and PV characteristics
are simulated at different temperature and irradiance conditions and the results are verified. The proposed
model is very simple fast and accurate. The designed model can be used for analysis of PV characteristics and
for simulation of maximum power point tracking algorithms
The performance of PV panel is very much dependent on the amount of sun light as well as the temperature of the surrounding environment which normally hard to be predicted. The use of PV emulator in the investigation of solar inverter especially at a lab scale platform helps to mitigate the inconsistency factors due to this uncontrollable variation. This work discussed on the design and development of a PV emulator for the grid-connected quasi-Z-source inverter which has different topology and control method compared to the conventional voltage source inverter. The I-V characteristics of the PV panel is modelled from the commercially available product and through circuit analysis the relation between capacitor voltage control and the PV terminal voltage is established, thus realizing the MPPT operation. Results from both simulation and experimental verification demonstrated that the PV emulator successfully able to produce power for the inverter according to the requirement.
A solar cell (also called photovoltaic cell) is a electrical device that converts the energy of light directly into electricity by the photovoltaic effect.
Development and Simulation of Stand Alone Photovoltaic Model Using Matlab/Sim...IJPEDS-IAES
This paper presents the implementation of a generalized photovoltaic model
using Matlab/Simulink software package, which can be representative of PV
cell, module for easy use on simulation platform. The proposed model is
designed with a user-friendly icon and a dialog box like Simulink block
libraries which makes the generalized PV model easily simulated and
analyzed in conjunction with power electronics. Taking the effect of sunlight
irradiance and cell temperature into consideration, the output current and
power characteristics of PV model are simulated and optimized using the
proposed model. The proposed model enables the dynamics of PV power
system to be easily simulated, analyzed and optimized.
Power output from a small solar panel can be affected by its power consumption when it consumes power from the solar panel. There has been a lack of proper research and experiment in the use of small solar panel with tracking systems. Its significance was detailed in this paper where the voltage output are compared with those which were externally powered. The solar trackers and a microcontroller have been designed and fabricated for this research. Due to the use of the tracking system (single axis and dual axis), the power consumption varies from one to another and its effect on the voltage output. Several experiments have been conducted and it was concluded that small solar panels are not efficient enough to utilize with tracking capabilities due to an increase in power consumption. The externally powered system was found to generate 18% more output compared to a selfsustaining system and that the increase in average power consumptions compared to a fixed panel were 31.7% and 82.5% for single-axis and dualaxis tracker respectively. A concrete evidence was made that utilizing solar tracking capabilities for low power rated solar panel is unfeasible.
This project is based on Construction and connection of photovoltaic module and related theories about it. To utilize maximum energy from the photovoltaic cell first of all understanding of it characteristics is very important because of this in starting of project we done proper study on characteristics of photo voltaic module and maximum power point. After got proper understanding of characteristics we try to use output of photo voltaic cell efficiently with help of Maximum power point tracker and cuk converter.
A solar cell, or photovoltaic cell, is an electrical device that converts the energy of light directly into electricity by the photovoltaic effect, which is a physical and chemical phenomenon. It is a form of photoelectric cell, defined as a device whose electrical characteristics, such as current, voltage, or resistance, vary when exposed to light. Individual solar cell devices are often the electrical building blocks of photovoltaic modules, known colloquially as solar panels. The common single junction silicon solar cell can produce a maximum open-circuit voltage of approximately 0.5 to 0.6 volts. Solar cells are described as being photovoltaic, irrespective of whether the source is sunlight or an artificial light. In addition to producing energy, they can be used as a photodetector (for example infrared detectors), detecting light or other electromagnetic radiation near the visible range, or measuring light intensity. The operation of a photovoltaic (PV) cell requires three basic attributes: The absorption of light, generating either electron-hole pairs or excitons.The separation of charge carriers of opposite types.The separate extraction of those carriers to an external circuit. In contrast, a solar thermal collector supplies heat by absorbing sunlight, for the purpose of either direct heating or indirect electrical power generation from heat. A "photoelectrolytic cell" (photoelectrochemical cell), on the other hand, refers either to a type of photovoltaic cell (like that developed by Edmond Becquerel and modern dye-sensitized solar cells), or to a device that splits water directly into hydrogen and oxygen using only solar illumination.
The Short and Long Term Peace Strategies: "Anglophone" Crisis, Cameroonijtsrd
Just like in Ethiopia, the unrest in the Republic of Cameroon is rooted in the countrys history, which dates back to many years. This paper seeks to analyze the institutional and attitudinal elements on the way forward for the restoration to normalcy of the state of affairs within the national territory. It is not a recipe for apportioning blames but of principles and options to a pacific settlement of disputes within the national territory. Maxwell N. Achu ""The Short and Long Term Peace Strategies: “Anglophone†Crisis, Cameroon"" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-3 , April 2019, URL: https://www.ijtsrd.com/papers/ijtsrd23512.pdf
Paper URL: https://www.ijtsrd.com/humanities-and-the-arts/other/23512/the-short-and-long-term-peace-strategies-%C3%A2%E2%82%AC%C5%93anglophone-crisis-cameroon/maxwell-n-achu
This work presents a hybrid soft-computing methodology approach for intelligent maximum power point tracking (MPPT) techniques of a photovoltaic (PV) system under any expected operating conditions using artificial neural network-fuzzy (neuro-fuzzy). The proposed technique predicts the calculation of the duty cycle ensuring optimal power transfer between the PV generator and the load. The neuro-fuzzy hybrid method combines artificial neural network (ANN) to direct the controller to the region where the MPP is located with its reference voltage estimator and its block of neural order. After that, the fuzzy logic controller (FLC) with rule inference begins to establish the photovoltaic solar system at the MPP. The obtained simulation results using MATLAB/simulink software for the proposed approach compared to ANN and the perturb and observe (P&O), proved that neuro-fuzzy approach fulfilled to extract the optimum power with pertinence, efficiency and precision.
This paper investigates the performances of different photovoltaic (PV) array under several shading condition. Four types of photovoltaic array configuration scheme which are ‘Series’ (S), Series-Parallel’ (SP), Total-Cross-Tied’ (TCT), and ‘Bridge-Link’ (BL) array topologies were tested by applying a 6x6 PV array under 6 different shading scenarios. The modeling is developed using Matlab/Simulink. The performances and output characteristics of photovoltaic array are compared and analyzed. System engineer can use the detailed characteristics of different array configuration to approximate the outcome power and pick the best configuration of the system by concerning the current natural condition to enhance the overall efficiency.
A single stage photo voltaic grid-connected inverter using spwmSHAIK AMANULLA
A Single-stage PhotoVoltaic Grid-Connected Inverter using SPWM. It was simulated and modeled with MATLAB/SIMULINK. It was simulated with constant and variable irradiation profiles. I got the results with variations in PV characteristics with different irradiation with SPWM technique.
Design of Dual Axis Solar Tracker System Based on Fuzzy Inference Systems ijscai
Electric power is a basic need in today’s life. Due to the extensive usage of power, there is a need to look
for an alternate clean energy source. Recently many researchers have focused on the solar energy as a
reliable alternative power source. Photovoltaic panels are used to collect sun radiation and convert it into
electrical energy. Most of the photovoltaic panels are deployed in a fixed position, they are inefficient as
they are fixed only at a specific angle. The efficiency of photovoltaic systems can be considerably increased
with an ability to change the panels angel according to the sun position. The main goal of such systems is
to make the sun radiation perpendicular to the photovoltaic panels as much as possible all the day times.
This paper presents a dual axis design for a fuzzy inference approach-based solar tracking system. The
system is modeled using Mamdani fuzzy logic model and the different combinations of ANFIS modeling.
Models are compared in terms of the correlation between the actual testing data output and their
corresponding forecasted output. The Mean Absolute Percent Error and Mean Percentage Error are used
to measure the models error size. In order to measure the effectiveness of the proposed models, we
compare the output power produced by a fixed photovoltaic panels with the output which would be
produced if the dual-axis panels are used. Results show that dual-axis solar tracker system will produce
22% more power than a fixed panels system.
KEYWORDS
Fuzzy, Membership function, Universe of discourse, PV, ANFIS, DC motor, FLC.
1. INTRODUCTION
Fuzzy logic can be viewed as an extension of classical logical
Modeling and Simulation of Solar Photovoltaic module using Matlab/SimulinkIOSR Journals
Abstract: This paper presents the circuit model of photovoltaic (PV) module. Simulation and modeling is done
using MATLAB/ Simulink software package. The proposed model is user friendly and can be used as a common
platform for both applied physics scientist and power electronics engineers. A detailed modeling procedure is
presented. The designed model is verified by using STP255-20/Wd PV module. The IV and PV characteristics
are simulated at different temperature and irradiance conditions and the results are verified. The proposed
model is very simple fast and accurate. The designed model can be used for analysis of PV characteristics and
for simulation of maximum power point tracking algorithms
The performance of PV panel is very much dependent on the amount of sun light as well as the temperature of the surrounding environment which normally hard to be predicted. The use of PV emulator in the investigation of solar inverter especially at a lab scale platform helps to mitigate the inconsistency factors due to this uncontrollable variation. This work discussed on the design and development of a PV emulator for the grid-connected quasi-Z-source inverter which has different topology and control method compared to the conventional voltage source inverter. The I-V characteristics of the PV panel is modelled from the commercially available product and through circuit analysis the relation between capacitor voltage control and the PV terminal voltage is established, thus realizing the MPPT operation. Results from both simulation and experimental verification demonstrated that the PV emulator successfully able to produce power for the inverter according to the requirement.
A solar cell (also called photovoltaic cell) is a electrical device that converts the energy of light directly into electricity by the photovoltaic effect.
Development and Simulation of Stand Alone Photovoltaic Model Using Matlab/Sim...IJPEDS-IAES
This paper presents the implementation of a generalized photovoltaic model
using Matlab/Simulink software package, which can be representative of PV
cell, module for easy use on simulation platform. The proposed model is
designed with a user-friendly icon and a dialog box like Simulink block
libraries which makes the generalized PV model easily simulated and
analyzed in conjunction with power electronics. Taking the effect of sunlight
irradiance and cell temperature into consideration, the output current and
power characteristics of PV model are simulated and optimized using the
proposed model. The proposed model enables the dynamics of PV power
system to be easily simulated, analyzed and optimized.
Abstract: We present a new algorithm, called the soft-tissue filter that can make both soft and bone tissue clearly visible in digital cephalic radiographies under a wide range of exposures. It uses a mixture model made up of two Gaussian distributions and one inverted lognormal distribution to analyze the image histogram. The image is clustered in three parts: background, soft tissue, and bone using this model. Improvement in the visibility of both structures is achieved through a local transformation based on gamma correction, stretching, and saturation, which is applied using different parameters for bone and soft-tissue pixels. A processing time of 1 s for 5 M pixel images allows the filter to operate in real time. Although the default value of the filter parameters is adequate for most images, real-time operation allows adjustment to recover under- and overexposed images or to obtain the best quality subjectively. The filter was extensively clinically tested: quantitative and qualitative results are reported here Index Terms: Digital radiography, histogram-based clustering, image enhancement, local gamma correction
Solar cells are a major alternate source of sustainable energy in the usual condition of depleting non- renewable energy sources. Nowadays, this source is getting more and more important due to its use in large and small-scale installations. One of the major causes of energy losses in photovoltaic (PV) modules is the shading. It can happen due to clouds passing, near trees, and/or neighboring structures. Generally, there are two types of PV module Shading which are either partial shading or complete shading. Both have a significant impact on the solar module output power. This paper is an attempt of carrying out a study of the electrical characteristics of a solar module with various percentages of simulated shading. The solar module tester (SMT) simulator was used in this study. The study approved the direct correlation between short-circuit current and solar irradiance. The advantage of using SMT is its stable irradiance in comparison to the practical unstable solar irradiance within the same period. The results of both methods of shading simulation show that shading has a significant impact on the performance of solar panel in terms of efficiency, fill factor and output power. For better performance, solar panels should install in shading free places as much as its possible.
Modelling and Analysis of Single Diode Photovoltaic Module using MATLAB/SimulinkIJERA Editor
The growing concern over environmental degradation resulting from combustion of fossil fuels and depleting
fossil fuel reserves has raised awareness about alternative energy options. Renewable energy system is perfect
solution of this problem. This paper presents a mathematical model of single diode solar photovoltaic (SPV)
module. SPV cell generates electricity when exposed to sunlight but this generation depends on whether
condition like temperature and irradiance, for better accuracy all the parameters are considered including shunt,
series resistance and simulated in MATLAB/Simulink. The output is analyzed by varying the temperature and
irradiance and effect of change in shunt and series resistance is also observed.
Bypass Diodes for Improving Solar Panel Performance IJECEIAES
The ouput power of solar panel that decreased due to shading has been improved using bypass diode method. The placement of bypass diodes increased the output current and power. New peaks and maximum powerpoints on the current-svoltage characteristics and power-voltage characteristics were observed. Without bypass diodes, the maximum output power was only around 50 W. After placing bypass diodes, the first peak around 115 W and second peak around 150 W appeared at voltage of around 31 V and 40 V, respectively.
Performance study of photovoltaic solar celleSAT Journals
Abstract
Energy is the driving force for any kind of economic and scientific development, automation, and innovation. Due to high
excursion rate of conventional energy sources, availability of conventional fuels is reducing day by day. Consequently their prices
are increasing very rapidly. Along with these they pollute atmosphere due to combustion and chemical process associated with
them. Considering all these it is needed to find nonconventional sources to meet up energy requirements. Worldwide ‘Solar
Energy’ is one of the most effective and popular nonconventional energy sources. Solar energy does not produce any pollutants
and is one of the cleanest energy sources. This can be used to produce electricity from sunlight, named solar power. Solar power
can be directly generated from PV cell or indirectly from concentrated solar power (CSP).
This paper focuses on the performance of photovoltaic (PV) solar cell for solar power. Therefore simulation is done to observe
efficiency for different changing conditions and parameters of solar cell electrical model and observe better efficiency for InGaAs
alloy.
Key Words: Solar power; Solar cell; PV; PV operation; Electricity generation; Electrical model; Solar cell materials;
Efficiency; Different parameters; Silicon; Indium Gallium Arsenide alloy.
Performance Investigation of Grid Connected Photovoltaic System Modelling Bas...IJECEIAES
Photovoltaic (PV) systems are normally modeled by employing accurate equations dealing with a behavior the PV system. This model has Characteristic of PV array cells, which are influenced by both irradiation and temperature variations. Grid-connected PV system is considered as electricity generated solar cell system which is connected to the grid utilities. This paper characterizes an exhibiting and simulating of PV system that executed with MATLAB /Simulink. The impact of solar irradiances as well as ambient temperature performances of PV models is investigated and noted that a lower temperature provides maximum power higher so that the open circuit voltage is larger. Furthermore, if the temperature is low, then a considerably short circuit current is low too.
Improving the efficiency of photovoltaic cells embedded in floating buoysIJECEIAES
Solar cells are used to power floating buoys, which is one of their applications. Floating buoys are devices that are placed on the sea and ocean surfaces to provide various information to the floats. Because these cells are subjected to varying environmental conditions, modeling and simulating photovoltaic cells enables us to install cells with higher efficiency and performance in them. The parameters of the single diode model are examined in this article so that the
I-V, P-V diagrams, and characteristics of the cadmium telluride (CdTe) photovoltaic cell designed with three layers (CdTe, CdS, and SnOx) can be extracted using a solar cell capacitance simulator (SCAPS) software, and we obtain the parameters of the single diode model using the ant colony optimization (ACO) algorithm. In this paper, the objective function is root mean square error (RMSE), and the best value obtained after 30 runs is 5.2217×10-5 in 2.46 seconds per iteration, indicating a good agreement between the simulated model and the real model and outperforms many other algorithms that have been developed thus far. The above optimization with 200 iterations, a population of 30, and 84 points was completed on a server with 32 gigabytes of random-access memory (RAM) and 30 processing cores.
The International Journal of Engineering and Science (The IJES)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.
This paper explains the experimental investigation to improve the output power of solar cell using cooling and light reflection from mirrors. The results show that by adding mirror, the current and output power of solar cell increase but the open circuit voltage and maximum power voltage decrease due to heat. By adding cooling, the open circuit voltage and the maximum power voltage are improved, so the output power also increases.
Epistemic Interaction - tuning interfaces to provide information for AI supportAlan Dix
Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
Accelerate your Kubernetes clusters with Varnish CachingThijs Feryn
A presentation about the usage and availability of Varnish on Kubernetes. This talk explores the capabilities of Varnish caching and shows how to use the Varnish Helm chart to deploy it to Kubernetes.
This presentation was delivered at K8SUG Singapore. See https://feryn.eu/presentations/accelerate-your-kubernetes-clusters-with-varnish-caching-k8sug-singapore-28-2024 for more details.
Essentials of Automations: Optimizing FME Workflows with ParametersSafe Software
Are you looking to streamline your workflows and boost your projects’ efficiency? Do you find yourself searching for ways to add flexibility and control over your FME workflows? If so, you’re in the right place.
Join us for an insightful dive into the world of FME parameters, a critical element in optimizing workflow efficiency. This webinar marks the beginning of our three-part “Essentials of Automation” series. This first webinar is designed to equip you with the knowledge and skills to utilize parameters effectively: enhancing the flexibility, maintainability, and user control of your FME projects.
Here’s what you’ll gain:
- Essentials of FME Parameters: Understand the pivotal role of parameters, including Reader/Writer, Transformer, User, and FME Flow categories. Discover how they are the key to unlocking automation and optimization within your workflows.
- Practical Applications in FME Form: Delve into key user parameter types including choice, connections, and file URLs. Allow users to control how a workflow runs, making your workflows more reusable. Learn to import values and deliver the best user experience for your workflows while enhancing accuracy.
- Optimization Strategies in FME Flow: Explore the creation and strategic deployment of parameters in FME Flow, including the use of deployment and geometry parameters, to maximize workflow efficiency.
- Pro Tips for Success: Gain insights on parameterizing connections and leveraging new features like Conditional Visibility for clarity and simplicity.
We’ll wrap up with a glimpse into future webinars, followed by a Q&A session to address your specific questions surrounding this topic.
Don’t miss this opportunity to elevate your FME expertise and drive your projects to new heights of efficiency.
Encryption in Microsoft 365 - ExpertsLive Netherlands 2024Albert Hoitingh
In this session I delve into the encryption technology used in Microsoft 365 and Microsoft Purview. Including the concepts of Customer Key and Double Key Encryption.
Generative AI Deep Dive: Advancing from Proof of Concept to ProductionAggregage
Join Maher Hanafi, VP of Engineering at Betterworks, in this new session where he'll share a practical framework to transform Gen AI prototypes into impactful products! He'll delve into the complexities of data collection and management, model selection and optimization, and ensuring security, scalability, and responsible use.
Securing your Kubernetes cluster_ a step-by-step guide to success !KatiaHIMEUR1
Today, after several years of existence, an extremely active community and an ultra-dynamic ecosystem, Kubernetes has established itself as the de facto standard in container orchestration. Thanks to a wide range of managed services, it has never been so easy to set up a ready-to-use Kubernetes cluster.
However, this ease of use means that the subject of security in Kubernetes is often left for later, or even neglected. This exposes companies to significant risks.
In this talk, I'll show you step-by-step how to secure your Kubernetes cluster for greater peace of mind and reliability.
Dev Dives: Train smarter, not harder – active learning and UiPath LLMs for do...UiPathCommunity
💥 Speed, accuracy, and scaling – discover the superpowers of GenAI in action with UiPath Document Understanding and Communications Mining™:
See how to accelerate model training and optimize model performance with active learning
Learn about the latest enhancements to out-of-the-box document processing – with little to no training required
Get an exclusive demo of the new family of UiPath LLMs – GenAI models specialized for processing different types of documents and messages
This is a hands-on session specifically designed for automation developers and AI enthusiasts seeking to enhance their knowledge in leveraging the latest intelligent document processing capabilities offered by UiPath.
Speakers:
👨🏫 Andras Palfi, Senior Product Manager, UiPath
👩🏫 Lenka Dulovicova, Product Program Manager, UiPath
GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
Builder.ai Founder Sachin Dev Duggal's Strategic Approach to Create an Innova...Ramesh Iyer
In today's fast-changing business world, Companies that adapt and embrace new ideas often need help to keep up with the competition. However, fostering a culture of innovation takes much work. It takes vision, leadership and willingness to take risks in the right proportion. Sachin Dev Duggal, co-founder of Builder.ai, has perfected the art of this balance, creating a company culture where creativity and growth are nurtured at each stage.
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Elevating Tactical DDD Patterns Through Object CalisthenicsDorra BARTAGUIZ
After immersing yourself in the blue book and its red counterpart, attending DDD-focused conferences, and applying tactical patterns, you're left with a crucial question: How do I ensure my design is effective? Tactical patterns within Domain-Driven Design (DDD) serve as guiding principles for creating clear and manageable domain models. However, achieving success with these patterns requires additional guidance. Interestingly, we've observed that a set of constraints initially designed for training purposes remarkably aligns with effective pattern implementation, offering a more ‘mechanical’ approach. Let's explore together how Object Calisthenics can elevate the design of your tactical DDD patterns, offering concrete help for those venturing into DDD for the first time!
UiPath Test Automation using UiPath Test Suite series, part 3DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 3. In this session, we will cover desktop automation along with UI automation.
Topics covered:
UI automation Introduction,
UI automation Sample
Desktop automation flow
Pradeep Chinnala, Senior Consultant Automation Developer @WonderBotz and UiPath MVP
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Welocme to ViralQR, your best QR code generator.ViralQR
Welcome to ViralQR, your best QR code generator available on the market!
At ViralQR, we design static and dynamic QR codes. Our mission is to make business operations easier and customer engagement more powerful through the use of QR technology. Be it a small-scale business or a huge enterprise, our easy-to-use platform provides multiple choices that can be tailored according to your company's branding and marketing strategies.
Our Vision
We are here to make the process of creating QR codes easy and smooth, thus enhancing customer interaction and making business more fluid. We very strongly believe in the ability of QR codes to change the world for businesses in their interaction with customers and are set on making that technology accessible and usable far and wide.
Our Achievements
Ever since its inception, we have successfully served many clients by offering QR codes in their marketing, service delivery, and collection of feedback across various industries. Our platform has been recognized for its ease of use and amazing features, which helped a business to make QR codes.
Our Services
At ViralQR, here is a comprehensive suite of services that caters to your very needs:
Static QR Codes: Create free static QR codes. These QR codes are able to store significant information such as URLs, vCards, plain text, emails and SMS, Wi-Fi credentials, and Bitcoin addresses.
Dynamic QR codes: These also have all the advanced features but are subscription-based. They can directly link to PDF files, images, micro-landing pages, social accounts, review forms, business pages, and applications. In addition, they can be branded with CTAs, frames, patterns, colors, and logos to enhance your branding.
Pricing and Packages
Additionally, there is a 14-day free offer to ViralQR, which is an exceptional opportunity for new users to take a feel of this platform. One can easily subscribe from there and experience the full dynamic of using QR codes. The subscription plans are not only meant for business; they are priced very flexibly so that literally every business could afford to benefit from our service.
Why choose us?
ViralQR will provide services for marketing, advertising, catering, retail, and the like. The QR codes can be posted on fliers, packaging, merchandise, and banners, as well as to substitute for cash and cards in a restaurant or coffee shop. With QR codes integrated into your business, improve customer engagement and streamline operations.
Comprehensive Analytics
Subscribers of ViralQR receive detailed analytics and tracking tools in light of having a view of the core values of QR code performance. Our analytics dashboard shows aggregate views and unique views, as well as detailed information about each impression, including time, device, browser, and estimated location by city and country.
So, thank you for choosing ViralQR; we have an offer of nothing but the best in terms of QR code services to meet business diversity!
Secstrike : Reverse Engineering & Pwnable tools for CTF.pptx
C018111623
1. IOSR Journal of Computer Engineering (IOSR-JCE)
e-ISSN: 2278-0661,p-ISSN: 2278-8727, Volume 18, Issue 1, Ver. I (Jan – Feb. 2016), PP 16-23
www.iosrjournals.org
DOI: 10.9790/0661-18111623 www.iosrjournals.org 16 | Page
Effect of Angle Orientation of Flat Mirror Concentrator on Solar
Panel System Output
Assist.prof Dr.Ali H.AL-Hamadany*
Assist.prof. Dr.Faten Sh. Zain Al-Abideen** Jinnan H. Ali
*University of Technology/Renewable Energy Research Center
**Almustansiriyah University /Education College/Physics Department
*** Baghdad Governorate
Abstract: In this research two flat glass mirrors is used as concentrator of solar panel system. The mirrors
increase's the concentration of sun light ray on the solar module. Anew model of solar panel system is designed
by mean of software Zemax in order to find best possible inclination angle of the concentrator that improves the
performance of the solar panel. So the efficiency is 59.5% for designed system with inclination angle 60° of the
concentrator. Then a practical design for the solar panel system with concentrators is established. The outdoor
measurements for the practical design indicated that the output power and efficiency is increasing by increasing
the inclination angle of the concentrator and reaches its maximum value at 60o
at different times of the date 5-2-
2014. Also the results showed that the maximum value of efficiency is 0.85 at 11 o'clock at 60o
. While the
maximum value of the output power is 72.8w at 12 o'clock of the same day.
Keywords: solar panel, concentrators, flat mirror concentrator. .
I. Introduction
The need for energy from renewable sources has become a pressing issue in recent years. Renewable
energy is the essential development for the secure future. Among various natural resources, solar energy is a
radiant energy that produced by the sun. The solar energy that is incident on the earth surface can be converted
directly to electricity by photovoltaic (PV) or into thermal energy by solar collectors.
A PV module consists of individual solar cells electrically connected together to increase their power
output. They are packaged so that they are protected from the environment and so that the user is protected from
electrical shock. However, several aspects of PV module design which may reduce either the power output of
the module or its lifetime need to be identified. A final structural component of the module is the edging or
framing of the module. A conventional PV module frame is typically made of aluminum. The frame structure
should be free of projections which could result in the lodgment of water, dust or other matter [1].
The using of solar energy in Iraq faces real problems which indicated as accumulation of dust on solar
panels and the high ambient temperatures. The accumulation comes from the increasing of activity of dust storm
after the year of 2000 due to the global climate change, enlarging the desertification and the shortage in water
resources. The input optical power, that reaches to the solar cells, decrease with period time and reached to
about 50% for one month under the effect of natural deposition of dust [1].
Over the last few decades, there has been an increasing effort from governments, industry and
academic institutions to find useful way to improve the solar cell or photovoltaic cell efficiency. One of these
ways is concentrator photovoltaic systems, which use a limited number of small, specialized, efficient solar cells
and concentrating optics to increase the intensity of sunlight striking the cells such as [2-6].
II. Solar Module Characteristic
A solar Module is a set of solar cells connected in series. Solar panels are referred to by the industry as
solar cell modules or PV modules. Module or panel is flat arrangement of series connected silicon solar cells.
There are generally 30 to 36 solar cells per module. The modules can be wired as series or parallel arrays to
produce higher voltage and currents as illustrated in Figure (1).
2. Effect of Angle Orientation of Flat Mirror Concentrator on Solar Panel System Output
DOI: 10.9790/0661-18111623 www.iosrjournals.org 17 | Page
Figure (1): The image of solar array [7].
The equivalent circuit of a solar Moduleis the sum of the solar cells equivalent circuits connected in
series. These circuits are shown in Figure (2). With sunlight on the Module and no external load, all the current
from the source is through the series diodes, but the output voltage of the Module is the sum of the voltages
across the diodes [8].
Figure (2): (A) Solar cell equivalent circuit and (B) solar module equivalent circuit [9].
The open circuit voltage (VOC) is the maximum voltage available from a solar cell, and this occurs at
zero current. The open circuit voltage corresponds to the amount of forward bias on the solar cell due to the bias
of the solar cell junction with the light – generated current. The VOC is shown on the IV curve in Figure (2)
[9,10] .
3. Effect of Angle Orientation of Flat Mirror Concentrator on Solar Panel System Output
DOI: 10.9790/0661-18111623 www.iosrjournals.org 18 | Page
Figure (3): Solar Module Characteristic Curve under Standard Test Conditions (STC) [9].
The VOC can be calculated from the relation [8]:
𝑉𝑜𝑐 =
𝑘𝑇
𝑞
𝑙𝑛
𝐼 𝐿
𝐼 𝑜
+ 1 …………………………………………………. (1)
Where kT/q, is the equivalent thermal voltage, IL is photocurrent (light generated current ) and Io is
reverse saturation current [11].
With sunlight on the Module and a short- circuit load, the entire current source is through the short. This is
the solar Module short-circuit current from the current source is through the short which is denoted (Isc) [8]. Isc
occurs on a point of the curve where the voltage is zero as shown in Figure (2). At this point, the power output
of the solar cell is zero. The series resistance (Rsi) of the solar cell contributes highly on power loss as the
current reaches its maximum limits. Ideally the Isc is equal to the light generated current (IL) which is countered
by all wavelengths less than ( ), numerically expressed as follows [12]:
…………………………………………… (2)
Where( λg) is the maximum wavelength causing generation of carriers, is the external quantum
efficiency which represents the ratio of Photo- generated current to the number of incident photons and
is the incident photon flux. The ISC is due to the generation and collection of light – generated carriers. For an
ideal solar cell at most moderate resistive loss mechanisms , the ISC maximum when the VOC is zero and the light
generated current are identical .Therefore, the (Isc) is the largest current which may be drawn from the solar
cell. It depends on a number of factors like the area of the solar cell, the number of photons, the spectrum of the
incident light, the optical properties (absorption and reflection) of the solar cell, the collection probability of the
solar cell, which depends chiefly on the surface passivation and the minority carrier lifetime in the base [10].
The point (Pm) on the knee of the curve, marks the value of current and voltage at which the module
delivers the greatest power for a given level of sunlight. Under standard test conditions (Irradiance 1000 W/m²,
air mass (AM=1.5 at θ= 60°), angle of incidence (AOI=0°) and temperature (25°C), the maximum current (Im)
and maximum voltage (Vm) at maximum output power (Pm) defined the rated power of the module. The other
characteristics of solar module are conversion efficiency (η) and Fill factor (FF). The conversion efficiency is
defined as the ratio of output electrical power to incident optical power.
The efficiencies equation can be written as [13].
……………………………………………… (3)
Pm =VOC ISC FF ………………………………………………………... (4)
Pin = I× A …………………………………………………………….. (5)
Where Pin is the incident power of the sun and can be calculated from multiplying the (I) solar irradiance in
(W/m²) by the area of the solar cell or module (A) in square meter unit.
Since the (Isc) is proportional to the irradiation, it is important to measure the incident irradiation during the
measurements. The irradiation can be measured using a pyranometer or solar meter device. The surface of the
solar meter is mounted normal to the sun [14].
g
g
dIL
0
)()(
)(
)(
%100%100
in
mm
in
m
P
VI
P
P
4. Effect of Angle Orientation of Flat Mirror Concentrator on Solar Panel System Output
DOI: 10.9790/0661-18111623 www.iosrjournals.org 19 | Page
And FF is the ratio of the maximum output power to the product ISC.VOC [13]
………………………………………………………………. (6)
If all the solar cells in a module have identical electrical characteristics, and they all experience the same
insolation and temperature, then all the cells will be operating at exactly the same current and voltage. In this
case, the IV curve of the PV module has the same shape as that of the individual cells, except that the voltage
and current are increased [1]. The overall IV curve of a set of identical connected solar cells is shown Figure (4)
[1].
Figure (4): I-V curve for N cells in series × M cells in parallel [1].
The equation for the circuit is [1]:
𝐼 𝑇 = 𝑀 · 𝐼𝐿 − 𝐼𝑜 𝑒𝑥𝑝
𝑞
𝑉 𝑇
𝑁
𝑛𝑘𝑇
− 1 ………………………………………….(7)
where:
N is the number of cells in series.
M is the number of cells in parallel.
IT is the total current from the circuit.
VT is the total voltage from the circuit.
Io is the saturation current from a single solar cell.
IL is the short-circuit current from a single solar cell.
n is the ideality factor of a single solar cell.
q, k, and T are constants
The total current is simply the current of an individual cell multiplied by the number of cells in parallel.
Such that:
ISC total = ISC × M ……………………………………………….………… (8)
IMP total = IMP × M ……………………………………………………….... (9)
VOC total = VOC × N ………………………………………………………... (10)
VMP total = VMP × N …………………………………………………….…. (11)
III. Solar Panel Model Design Using Software Zemax
A theoretical model has been designed by using software Zemax to determine the best angle of
inclination of the flat mirror concentrator (FMC) which is fixed on the solar panel module and then its
inclination angle is changed from 10o
to 90o
by steps of 10o
in order to get optimum angle that gives higher
efficiency. The input parameters in Zemax window includes:
1-The object distances (for the sun i.e infinity distance).
2- The radius of curvature of the concentrator mirror (∞ i.e plane).
3-The coated material of the concentrator (Ag), (refraction index of the reflection coating).
4-The inclination angle between the concentrator mirror and the solar panel.
5- The dimension of solar concentrator and solar panel (length 146 cm – width 68cm).
6- The wavelength of the incident light (UV wavelength 0-380) nm, (visible wavelength380-780) nm.
7- Entrance pupil diameter of the system 150cm.
8- Filed of view of the total system 0.25
9- The angle of the incident light with the system 45°.
Table (1) shows the change in the inclination angles of the concentrator with the solar panel using the
Zemax and the values of η at each angle.
OCSC
mm
VI
VI
FF
5. Effect of Angle Orientation of Flat Mirror Concentrator on Solar Panel System Output
DOI: 10.9790/0661-18111623 www.iosrjournals.org 20 | Page
Table (1): The efficiency of the each angle by Zemax software
Efficiency η %tilt y(θ)z-positionx-position
28%10-60610mir 1
-10-60-610mir2
28%20-120600mir 1
-20-120-600mir2
28%30-180590mir 1
-30-180-590mir2
29.40%40-220550mir 1
-40-220-550mir2
44.30%50-240500mir 1
-50-240-500mir2
59.50%60-280480mir 1
-60-280-480mir2
52%70-320440mir 1
-70-320-440mir2
38%80-350370mir 1
-80-350-370mir2
28%90-360320mir 1
-90-360-320mir2
Table (1) shows that the maximum efficiency is 59.90% at angle 60o
.
The output result after optimaization include:
1-The irradiance distribution on the solar panel.
2-The collection efficiency by the solar panel.
IV. Practical design
The designed system (Figure 5) consist of two concentrator (flat mirrors that made of glass) with length
146 cm and width 68 cm for each one of the mirrors enclosed by aluminum frame and connected with a solar
panel tilted at 45° from the horizon in the direction of the sun to concentrate light on the solar panel in order to
make the sun light covering a largest area of it. The length of the solar panel is 147cm, width 68cm and consists
of 36 solar cell peak power 110W ,peak voltage 17.5V, peak current 6.29Amp, VOC = 22 V and the ISC =6.85
Amp ,weight 12.5 kg, maximum system voltage 1000V ,temperature T=25ºC, Solar radiation 1000W/m².
(a) (b)
Figure (5): (a) The static solar panel with inclination angle 45 ° with horizon
(b) The concentrator inclined with angle 60°.
6. Effect of Angle Orientation of Flat Mirror Concentrator on Solar Panel System Output
DOI: 10.9790/0661-18111623 www.iosrjournals.org 21 | Page
The inclination angle of the concentrator on the solar panel has changed with different values from
30°to 80° with step by 5° during every 55 minutes once for several times a day.
V. Results
The Figure (6-a -b) show the designed system with inclination angle 60° at which the efficiency is
(59.5%) that constructed from software Zemax. The two plates (red and green), represents the concentrator and
the black one represent the solar panel. The blue lines represent the incident light. The intensity of solar
radiation on the solar panel system is shown in figure (7). While figure (8) show the spectrum of the
illumination intensity of the solar panel system at inclination angle 60°
.
(b) (a)
Figure (6-a-b): Designed solar panel system using software Zemax
with a FM concentrator.
Figure (7): The intensity of solar radiation on the solar panel system.
Figure (8): The spectrum of the illumination intensity of the solar panel system at 60°
The out dower measurements of ISC , VOC , P , T , FF and η for the solar panel system at different times
of the date 5-2-2015 are illustrated in tables (2), (3), (4) and (5).
7. Effect of Angle Orientation of Flat Mirror Concentrator on Solar Panel System Output
DOI: 10.9790/0661-18111623 www.iosrjournals.org 22 | Page
The results showed the optimum angle that gives the best efficiency for the designed system is 60o
and
this is in a good agreement with the result that is constructed from software Zemax.
Table (2): The characteristics for the static solar panel at different inclination angles of the concentrator at 9 am
on 5-2-2014.
Solar radiation Intensity
( W/cm²)%ƞFF
T
(h.m)
P
(W)
ISC
(amp)
VOC
(V)
Angle
(degree)
1500.421.6922.91.120.980
1500.541.29.229.21.420.975
1500.571.19.531.31.520.970
1500.611.19.833.21.620.865
1500.6819.1137.21.820.760
1500.651.09.1335.11.720.755
1500.611.19.1633.11.620.750
1500.531.29.1928.81.420.645
1500.461.49.2224.91.220.840
1500.381.79.2420.8120.835
1500.381.79.2720.8120.830
Table (3): The characteristics for the static solar panel at different inclination angles of the concentrator at 10 am
on 5-2-2014.
Solar radiation Intensity
( W/cm²)%ƞFF
T
(h.m)
P
(W)
ISC
(amp)
VOC
(V)
Angle
(degree)
1500.312.51017.20.8320.880
1500.382.110.220.8120.875
1500.421.910.423.11.12170
1500.581.410.631.51.52165
1500.82110.944.3221.160
1500.771.010.114222155
1500.771.010.1441.8220.950
1500.731.110.1739.51.920.845
1500.651.210.1935.11.720.740
1500.531.510.2229.11.420.835
1500.382.110.2520.8120.830
Table (4): The characteristics for the static solar panel at different inclination angles of the concentrator at 11
am on 5-2-2014 .
Table (5): The characteristics for the static solar panel at different inclination angles of the concentrator at 12 on
5-2-2014.
Solar radiation Intensity
( W/cm²)%ƞFF
T
(h.m)
P
(W)
ISC (amp)VOC (V)
Angle
(degree)
2500.571.41251.52.520.680
2500.621.312.255.82.720.775
2500.691.112.562.7320.970
2500.761.012.768.63.320.865
2500.80112.1172.83.520.860
2500.801.012.1372.43.520.755
2500.751.012.1668.33.720.750
2500.731.012.1966.53.220.845
2500.731.012.2166.23.220.740
2500.691.112.2462.1320.735
2500.681.112.2761.8320.630
Solar radiation Intensity
( W/cm²)%ƞFF
T
(h.m)
P
(W)
ISC
(amp)
VOC
(V)
Angle
(degree)
2000.481.71135.11.720.780
2000.541.511.439.51.920.875
2000.601.411.643.42.120.770
2000.681.211.849.42.420.665
2000.85111.1161.8320.660
2000.821.011.1359.70.920.655
2000.831.011.15602.920.750
2000.801.011.1757.92.820.745
2000.801.011.1957.62.820.640
2000.771.111.2155.62.720.635
2000.771.1112355.62.720.630
8. Effect of Angle Orientation of Flat Mirror Concentrator on Solar Panel System Output
DOI: 10.9790/0661-18111623 www.iosrjournals.org 23 | Page
VI. Conclusion
The results showed that the output power of the designed system and its efficiency is increasing by
increasing the inclination angle of the concentrator. It reaches its maximum value at 60o
at different times of the
date 5-2-2014. Also the results showed that the maximum value of efficiency is 0.85 at 11 o'clock with
inclination angle 60o
of the concentrating mirror with solar panel. While the maximum value of the output
power is 72.8w at 12 o'clock of the same day.
References:
[1]. Ahmed F. Atwan, Naseer K. Kasim, Ala'a H. Shnieshil, "PV Solar Panel Performance under the Effect of Dust in Baghdad",
RONCHI, Italy, N.3, PP.379-388, 2012.
[2]. Karvelas .E, Papadopoulos A., Dousis D., Markopoulos Y. P., Mathioulakis E., Panaras G., Vamvakas V. and Davazoglou D., ''
Mirrors Based on Total Reflection for Concentration PV Panels'', 4th International Conference on Solar Concentrators for the
Generation of Electricity or Hydrogen, pp 165-168, Attiki, Greece, 2002.
[3]. Maria B., ''Optical Efficiency of Low – Concentrating Solar Energy Systems With Parabolic Reflectors'', 2004.
[4]. David N. W., ''Improved boost mirror for low concentration photovoltaic solar power systems'', Silver Spring, Maryland, e-mail:
davidnelsonwells@yahoo.com, 2009.
[5]. Alaa M. A., "Solar Energy the Suitable Energy Alternative for Iraq Beyond Oil", International Conference on Petroleum and
Sustainable Development IPCBEE , IACSIT Press, Singapore, vol. 26 , 2011.
[6]. Abdilmoutalib H. A. Al- Shareefy, "Study The Performance of Fresnel – Based Photovoltaic Concentrator'', MSc Thesis, Al-
Mustansiriyah University, Education College, Physics Dep., [2012].
[7]. Science and technology ministry, 2008.
[8]. Horowitz, Paul and Hill, "The Art of Electronics'', 2nd
Edition", University of Cambridge, Winfield, P. 932-933, 1989.
[9]. Chesney Mc. P. J., "Solar Electric Power for Instruments at Remote Sites", University of Washington Geophysics Program, Science
for a Changing World (USGS), Open File Report 00-128, 2000.
[10]. Sinton R.A., Cuevas A., "Contactless determination of current – voltage characteristics and minority – carrier lifetimes in
semiconductors from quasi – steady – state photoconductance data ", journal of Applied physics Letters, vol. 69, p.p. 2510-2512,
1996.
[11]. Edward S. Y., "Microelectronic Devices", McGraw-Hill, 1988.
[12]. Hovel H. J., "Semiconductor and Semimetals, Solar Cells", Vol.11, Academic Press, 1975.
[13]. Ashok S. and Pand K. P., "Photovoltaic Measurements ", Solar Cells, Vol. 14, 1985.
[14]. Nilsson, J., "Optical Design and characterization of Solar Concentrators for photovoltaics", Division of Energy and Building Design
Department of architecture and built Environment Lund University, p.p. 43-53, 2005.