The document examines different possibilities for installing and orienting solar thermal systems on the rooftop of a reference building. A simulation was conducted to analyze how installation and orientation impact the costs of solar energy production, savings on wood pellets for heating, and the system's efficiency. The economic efficiency of a solar thermal installation can be strongly influenced by the installation method and orientation. Simulation results show variations in solar energy contribution percentages, heating and hot water fractions, and the energy balance for different installation scenarios.
Welcome to International Journal of Engineering Research and Development (IJERD)IJERD Editor
journal publishing, how to publish research paper, Call For research paper, international journal, publishing a paper, IJERD, journal of science and technology, how to get a research paper published, publishing a paper, publishing of journal, publishing of research paper, reserach and review articles, IJERD Journal, How to publish your research paper, publish research paper, open access engineering journal, Engineering journal, Mathemetics journal, Physics journal, Chemistry journal, Computer Engineering, Computer Science journal, how to submit your paper, peer reviw journal, indexed journal, reserach and review articles, engineering journal, www.ijerd.com, research journals,
yahoo journals, bing journals, International Journal of Engineering Research and Development, google journals, hard copy of journal
CFD Analysis of a Heat Collector Element in a Solar Parabolic Trough Collector iMentor Education
A numerical study of the performance of a solar Parabolic Trough Collector (PTC) has been done focusing on its receiver. The receiver consisting of a glass-shield enclosing a Heat Collector Element (HCE) with vacuum in the annular space has been subjected to seasonal and diurnal variations of solar radiation along with the
concentrated heat flux reflected from the parabolic trough mirror for conditions at Pune, India. The HCE is modeled as a metallic tube with thermic fluid Therminol-VP1TM flowing through it at low Reynolds number under thermally developing conditions with highly temperature dependent properties. The highly asymmetric
nature of the physics for thermal and turbulent flow conditions make it imperative to consider a complete three dimensional domain for the conjugate heat transfer analysis. The conduction, convection and radiation heat transfer effects have been modeled with radiation restricted within the annular region using the S2S radiation
model. The solar fluxes have been modeled using the Solar Load Model also accounting for the shadowing effects for semi-transparent and opaque surfaces. The pressure drop in the thermic fluid flow is comparatively uniform throughout the day during winter conditions while the fluid gets heated up 4 times more at noon
compared to morning. The summer conditions exhibit a 2.5 times higher pressure drop at noon compared to the morning conditions. The comprehensive analysis is performed using the finite volume based CFD code of ANSYS FLUENT 12.1 and verifies the huge potential that PTC holds for high temperature applications in
concentrated solar power plants.
Bill Gould, CTO at SolarReserve, presented at the GW Solar Institute Symposium on April 19, 2010. For more information visit: solar.gwu.edu/Symposium.html
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Welcome to International Journal of Engineering Research and Development (IJERD)IJERD Editor
journal publishing, how to publish research paper, Call For research paper, international journal, publishing a paper, IJERD, journal of science and technology, how to get a research paper published, publishing a paper, publishing of journal, publishing of research paper, reserach and review articles, IJERD Journal, How to publish your research paper, publish research paper, open access engineering journal, Engineering journal, Mathemetics journal, Physics journal, Chemistry journal, Computer Engineering, Computer Science journal, how to submit your paper, peer reviw journal, indexed journal, reserach and review articles, engineering journal, www.ijerd.com, research journals,
yahoo journals, bing journals, International Journal of Engineering Research and Development, google journals, hard copy of journal
CFD Analysis of a Heat Collector Element in a Solar Parabolic Trough Collector iMentor Education
A numerical study of the performance of a solar Parabolic Trough Collector (PTC) has been done focusing on its receiver. The receiver consisting of a glass-shield enclosing a Heat Collector Element (HCE) with vacuum in the annular space has been subjected to seasonal and diurnal variations of solar radiation along with the
concentrated heat flux reflected from the parabolic trough mirror for conditions at Pune, India. The HCE is modeled as a metallic tube with thermic fluid Therminol-VP1TM flowing through it at low Reynolds number under thermally developing conditions with highly temperature dependent properties. The highly asymmetric
nature of the physics for thermal and turbulent flow conditions make it imperative to consider a complete three dimensional domain for the conjugate heat transfer analysis. The conduction, convection and radiation heat transfer effects have been modeled with radiation restricted within the annular region using the S2S radiation
model. The solar fluxes have been modeled using the Solar Load Model also accounting for the shadowing effects for semi-transparent and opaque surfaces. The pressure drop in the thermic fluid flow is comparatively uniform throughout the day during winter conditions while the fluid gets heated up 4 times more at noon
compared to morning. The summer conditions exhibit a 2.5 times higher pressure drop at noon compared to the morning conditions. The comprehensive analysis is performed using the finite volume based CFD code of ANSYS FLUENT 12.1 and verifies the huge potential that PTC holds for high temperature applications in
concentrated solar power plants.
Bill Gould, CTO at SolarReserve, presented at the GW Solar Institute Symposium on April 19, 2010. For more information visit: solar.gwu.edu/Symposium.html
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Solar photovoltaic thermal (PV/t) parabolic trough collector systemManav Shah
This system consists of concentrating parabolic trough collector to magnify the solar radiation onto the focal point where absorber tube has been placed. Working fluid such as water is passed from the tube with the help of pump. In order to increase the overall efficiency of the system, photovoltaic cells are placed on the absorber tube so that hot water and electricity can be produced from one integrated system.
DESIGN, FABRICATION AND PERFORMANCE EVALUATION OF A LOWCOST PARABOLIC TROUGH ...IAEME Publication
In the present work, an attempt has been made to design, fabricate & evaluate the performance of Parabolic Trough Collector (PTC) to produce hot water. The Supporting stand of
concentrator is made of mild steel & reflector is made of acrylic sheet with a rim angle of 45o and aperture area of 2.14 m2
and with a concentration ratio of 12.59. The receiver pipe is made of pure copper. The thermal performance of the PTC was determined according to ASHRAE 93-1986 (RA 91). The maximum instantaneous thermal efficiency of 52.35% is obtained. The total cost of the parabolic trough collector is calculated as Rs 7,000.
Analysis of Energy Generation from Exhaust of Automobile using Peltier Thermo...ijtsrd
In recent past days, big deal of the automobile industry's RESEARCH and DEVELOPMENT Practicing on improving overall efficiency of vehicle. It has brought a major interest in the field of making internal combustion engines highly efficient 1 . In past days, only 25 30 energy is used in the vehicle and rest is exposed to surroundings. The useful energy is used to run the engine as well as generator. So the efficiency of those engine were very less. But the efficiency can be improved by utilizing waste heat that is exhaust of vehicle. One of the best technology that was found to be useful for this purpose were thermoelectric generator. In this, we study and investigated the use of thermoelectric generator for power production 2 . Thermoelectric generator works by imparting exhaust's gas stream on its surface and small D.C. electric current developed due to difference in temperature across heat exchanger that is put in the pathway of exhaust gas i.e. working on seebeck effect principle. An output Voltage of 200mV was generated using a single Bi2Te3 thermoelectric module for a temperature difference of about 40o C which can be used in charging battery, headlight, G.P.S. systems, etc. Such that it can reduce the level of alternator's frictional power that is used to save fuel and also in automotive industry to increase the efficiency of engine 1 . Naveen Kumar | Vaibhav Setia | Sunil Kumar Patel | Satyam Upadhyay, | Saurabh Chauhan, | Prakhar Bajpai ""Analysis of Energy Generation from Exhaust of Automobile using Peltier (Thermoelectric Generator)"" 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/ijtsrd22986.pdf
Paper URL: https://www.ijtsrd.com/engineering/transport-engineering/22986/analysis-of-energy-generation-from-exhaust-of-automobile-using-peltier-thermoelectric-generator/naveen-kumar
Fabrication, Designing & Performance Analysis of Solar Parabolic TroughIJERA Editor
A parabolic trough solar collector uses a parabolic cylinder to reflect and concentrate sun radiations towards a receiver tube located at the focus line of the parabolic cylinder. The receiver absorbs the incoming radiations and transforms them into thermal energy, the latter being transported and collected by a fluid medium circulating within the receiver tube.This method of concentrated solar collection has the advantage of high efficiency and low cost, and can be used either for thermal energy collection, for generating electricity or for both, This paper focused on the fabrication and designing of solar parabolic trough, The designing of trough is depend upon the following parameters : Aperture of the concentrator , Inner diameter of absorber tube, Outer diameter of absorber tube, Inner diameter of glass tube, Outer diameter of glass tube, Length of parabolic trough, Concentration ratio, Collector aperture area, Specular reflectivity of concentrator, Glass cover transitivity for solar radiation, Absorber tube emissivity/emissivity, Intercept factor, Emissivity of absorber tube surface and Emissivity of glass. The performance analysis will be based on the Experimental data collection and calculations with reference to: Thermal performance calculations, Overall loss coefficient and heat correlations. Heat transfer coefficient on the inside surface of the absorber tube and Heat transfer coefficient between the absorber tube and the Cover.
World Renewable Energy Congress (WREC) was held at Linkoping, Sweden in May 2011.
Under the broad classification of Solar Thermal Heating (STH) applications, the topic of this paper is "An exergy based unified test protocol for solar cookers of different geometries".
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.
Solar photovoltaic thermal (PV/t) parabolic trough collector systemManav Shah
This system consists of concentrating parabolic trough collector to magnify the solar radiation onto the focal point where absorber tube has been placed. Working fluid such as water is passed from the tube with the help of pump. In order to increase the overall efficiency of the system, photovoltaic cells are placed on the absorber tube so that hot water and electricity can be produced from one integrated system.
DESIGN, FABRICATION AND PERFORMANCE EVALUATION OF A LOWCOST PARABOLIC TROUGH ...IAEME Publication
In the present work, an attempt has been made to design, fabricate & evaluate the performance of Parabolic Trough Collector (PTC) to produce hot water. The Supporting stand of
concentrator is made of mild steel & reflector is made of acrylic sheet with a rim angle of 45o and aperture area of 2.14 m2
and with a concentration ratio of 12.59. The receiver pipe is made of pure copper. The thermal performance of the PTC was determined according to ASHRAE 93-1986 (RA 91). The maximum instantaneous thermal efficiency of 52.35% is obtained. The total cost of the parabolic trough collector is calculated as Rs 7,000.
Analysis of Energy Generation from Exhaust of Automobile using Peltier Thermo...ijtsrd
In recent past days, big deal of the automobile industry's RESEARCH and DEVELOPMENT Practicing on improving overall efficiency of vehicle. It has brought a major interest in the field of making internal combustion engines highly efficient 1 . In past days, only 25 30 energy is used in the vehicle and rest is exposed to surroundings. The useful energy is used to run the engine as well as generator. So the efficiency of those engine were very less. But the efficiency can be improved by utilizing waste heat that is exhaust of vehicle. One of the best technology that was found to be useful for this purpose were thermoelectric generator. In this, we study and investigated the use of thermoelectric generator for power production 2 . Thermoelectric generator works by imparting exhaust's gas stream on its surface and small D.C. electric current developed due to difference in temperature across heat exchanger that is put in the pathway of exhaust gas i.e. working on seebeck effect principle. An output Voltage of 200mV was generated using a single Bi2Te3 thermoelectric module for a temperature difference of about 40o C which can be used in charging battery, headlight, G.P.S. systems, etc. Such that it can reduce the level of alternator's frictional power that is used to save fuel and also in automotive industry to increase the efficiency of engine 1 . Naveen Kumar | Vaibhav Setia | Sunil Kumar Patel | Satyam Upadhyay, | Saurabh Chauhan, | Prakhar Bajpai ""Analysis of Energy Generation from Exhaust of Automobile using Peltier (Thermoelectric Generator)"" 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/ijtsrd22986.pdf
Paper URL: https://www.ijtsrd.com/engineering/transport-engineering/22986/analysis-of-energy-generation-from-exhaust-of-automobile-using-peltier-thermoelectric-generator/naveen-kumar
Fabrication, Designing & Performance Analysis of Solar Parabolic TroughIJERA Editor
A parabolic trough solar collector uses a parabolic cylinder to reflect and concentrate sun radiations towards a receiver tube located at the focus line of the parabolic cylinder. The receiver absorbs the incoming radiations and transforms them into thermal energy, the latter being transported and collected by a fluid medium circulating within the receiver tube.This method of concentrated solar collection has the advantage of high efficiency and low cost, and can be used either for thermal energy collection, for generating electricity or for both, This paper focused on the fabrication and designing of solar parabolic trough, The designing of trough is depend upon the following parameters : Aperture of the concentrator , Inner diameter of absorber tube, Outer diameter of absorber tube, Inner diameter of glass tube, Outer diameter of glass tube, Length of parabolic trough, Concentration ratio, Collector aperture area, Specular reflectivity of concentrator, Glass cover transitivity for solar radiation, Absorber tube emissivity/emissivity, Intercept factor, Emissivity of absorber tube surface and Emissivity of glass. The performance analysis will be based on the Experimental data collection and calculations with reference to: Thermal performance calculations, Overall loss coefficient and heat correlations. Heat transfer coefficient on the inside surface of the absorber tube and Heat transfer coefficient between the absorber tube and the Cover.
World Renewable Energy Congress (WREC) was held at Linkoping, Sweden in May 2011.
Under the broad classification of Solar Thermal Heating (STH) applications, the topic of this paper is "An exergy based unified test protocol for solar cookers of different geometries".
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.
Effect on Efficiency of Two-phase Flow Distribution in a Parallel Flow Heat E...IJMER
International Journal of Modern Engineering Research (IJMER) is Peer reviewed, online Journal. It serves as an international archival forum of scholarly research related to engineering and science education.
International Journal of Modern Engineering Research (IJMER) covers all the fields of engineering and science: Electrical Engineering, Mechanical Engineering, Civil Engineering, Chemical Engineering, Computer Engineering, Agricultural Engineering, Aerospace Engineering, Thermodynamics, Structural Engineering, Control Engineering, Robotics, Mechatronics, Fluid Mechanics, Nanotechnology, Simulators, Web-based Learning, Remote Laboratories, Engineering Design Methods, Education Research, Students' Satisfaction and Motivation, Global Projects, and Assessment…. And many more.
Query Answering Approach Based on Document SummarizationIJMER
The growing of online information obliged the availability of a thorough research in the
domain of automatic text summarization within the Natural Language Processing (NLP)
community.The aim of this paper is to propose a novel approach for a language independent automatic
summarization approach that combines three main approaches. The Rhetorical Structure Theory
(RST), the query processing approach, and the Network Representationapproach (NRA). RST, as a
theory of major aspect for the structure of natural text, is used to extract the semantic relation behind
the text.Query processing approachclassifies the question type and finds the answer in a way that suits
the user’s needs. The NRA is used to create a graph representing the extracted semantic relation. The
output is an answer, which not only responses to the question, but also gives the user an opportunity to
find additional information that is related to the question.We implemented the proposed approach. As a
case study, the implemented approachis applied on Arabic text in the agriculture field. The
implemented approach succeeded in summarizing extension documents according to user's query. The
approach results have been evaluated using Recall, Precision and F-score measures.
"Once upon a time": powerful words that begin many oral narratives and indicate that the story to be told will be imbued with magic and myth. Organizational folklore can be a very powerful force for instilling or perpetuating behavior, systems, and culture within an organization.
Too often, fear and negativity are the driving forces in the folklore behind many organizational traditions. A positive narrative that embraces the customs and traditions of a healthy, balanced feedback loop can help jumpstart your DevOps journey. This talk will help you frame your narrative alongside metrics and use folklore as a catalyst for positive change.
Enhance the Productivity of the Solar Still by Improving the Operational Para...IJMER
Abstract: The productivity of the still is mainly depends upon various operational parameters. In this project a cooling wick is fixed at the top of the glass, and the cooling water is allowed to flow continuously, through the wick, in order to reduce the glass temperature. A mini solar pond and a flat plate collector also integrated with the glass cover cooled solar still in order to increase the inlet water temperature, Here two models were fabricated one is basic model and the another one is still with cooling
wick at the top of the glass. Various readings were taken throughout the day and readings were tabulated. The results showing that the glass cooled solar still integrated with flat plate collector gives the higher productivity than the basic solar still. The productivity of the still is improved by 27.32%, the daily water collection of the glass cover cooled solar still integrated with mini solar pond is found that 59.5%.
A Distributed Cut Detection Method for Wireless Sensor NetworksIJMER
International Journal of Modern Engineering Research (IJMER) is Peer reviewed, online Journal. It serves as an international archival forum of scholarly research related to engineering and science education.
International Journal of Modern Engineering Research (IJMER) covers all the fields of engineering and science: Electrical Engineering, Mechanical Engineering, Civil Engineering, Chemical Engineering, Computer Engineering, Agricultural Engineering, Aerospace Engineering, Thermodynamics, Structural Engineering, Control Engineering, Robotics, Mechatronics, Fluid Mechanics, Nanotechnology, Simulators, Web-based Learning, Remote Laboratories, Engineering Design Methods, Education Research, Students' Satisfaction and Motivation, Global Projects, and Assessment…. And many more.
Trajectory Control With MPC For A Robot Manipülatör Using ANN ModelIJMER
In this study, in a computer the dynamic motion modelling of manipulator and control of
trajectory with an algorithm this has been tested. First after dynamic motion simulation of manipulator
has been made MPC Control. The result in this study we can observe that computed torque method gives
better results than MPC methods. So in trajectory control it is approved of using computed torque
method. In last part of this study the results are estimated forward development are exemined and
suggested. The model predictive control (MPC) technique for an articulated robot with n joints is
introduced in this paper. The proposed MPC control action is conceptually different with the trajectory
robot control methods in that the control action is determined by optimising a performance index over
the time horizon. A neural network (NN) is used in this paper as the predictive model.
The Queue M/M/1 with Additional Servers for a Longer QueueIJMER
This paper deals with the queuing system M/M/1 with additional servers for a longer queue.
Clearly the traffic intensity for this system will depend on the number of additional servers. The expected
number of customers in the system, the probability of the additional of one server and the probability of
the additional of two servers are obtained under the assumption that the number of additional servers
depends on the number of customers in the system. The condition under which the M/M/1 queuing system
with additional servers is profitable is discussed. A MATLAB program is used to illustrate this condition
numerically. Finally, the maximum likelihood estimators of the parameters for this queuing system are
obtained.
Optimized, Low-Power Dissipative and Precise Pulsating Constant Current Sourc...IJMER
International Journal of Modern Engineering Research (IJMER) is Peer reviewed, online Journal. It serves as an international archival forum of scholarly research related to engineering and science education.
Influence of Hadoop in Big Data Analysis and Its Aspects IJMER
This paper is an effort to present the basic understanding of BIG DATA and
HADOOP and its usefulness to an organization from the performance perspective. Along-with the
introduction of BIG DATA, the important parameters and attributes that make this emerging concept
attractive to organizations has been highlighted. The paper also evaluates the difference in the
challenges faced by a small organization as compared to a medium or large scale operation and
therefore the differences in their approach and treatment of BIG DATA. As Hadoop is a Substantial
scale, open source programming system committed to adaptable, disseminated, information
concentrated processing. A number of application examples of implementation of BIG DATA across
industries varying in strategy, product and processes have been presented. This paper also deals
with the technology aspects of BIG DATA for its implementation in organizations. Since HADOOP has
emerged as a popular tool for BIG DATA implementation. Map reduce is a programming structure for
effectively composing requisitions which prepare boundless measures of information (multi-terabyte
information sets) in- parallel on extensive bunches of merchandise fittings in a dependable,
shortcoming tolerant way. A Map reduce skeleton comprises of two parts. They are “mapper" and
"reducer" which have been examined in this paper. The paper deals with the overall architecture of
HADOOP along with the details of its various components in Big Data.
International Journal of Computational Engineering Research(IJCER) ijceronline
nternational Journal of Computational Engineering Research (IJCER) is dedicated to protecting personal information and will make every reasonable effort to handle collected information appropriately. All information collected, as well as related requests, will be handled as carefully and efficiently as possible in accordance with IJCER standards for integrity and objectivity.
PERFORMANCE OPTIMIZATION OF HYBRID SOLAR HEATING SYSTEM USING THERMOELECTRIC...IAEME Publication
The hybrid solar system assumed to be consist of thermoelectric generator (TEG) and evacuated tube with efficiency extracted under standard condition of 1000 w/m2and ambient temperature 25 C, then the efficiency of hybrid system measured at different solar radiation and temperature. In addition the thermal efficiency and electrical efficiency are extracted. The study was done with different figure of merit (ZT) (0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4) of thermoelectric generator (TEG). The heat transfer coefficient of evacuated tube 0.89 W/k.m and temperature dependent that transfer coefficient 0.001w/k2. m the calculation and graphs were done by MATLAB program
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
A Study on Translucent Concrete Product and Its Properties by Using Optical F...IJMER
- Translucent concrete is a concrete based material with light-transferring properties,
obtained due to embedded light optical elements like Optical fibers used in concrete. Light is conducted
through the concrete from one end to the other. This results into a certain light pattern on the other
surface, depending on the fiber structure. Optical fibers transmit light so effectively that there is
virtually no loss of light conducted through the fibers. This paper deals with the modeling of such
translucent or transparent concrete blocks and panel and their usage and also the advantages it brings
in the field. The main purpose is to use sunlight as a light source to reduce the power consumption of
illumination and to use the optical fiber to sense the stress of structures and also use this concrete as an
architectural purpose of the building
Developing Cost Effective Automation for Cotton Seed DelintingIJMER
A low cost automation system for removal of lint from cottonseed is to be designed and
developed. The setup consists of stainless steel drum with stirrer in which cottonseeds having lint is mixed
with concentrated sulphuric acid. So lint will get burn. This lint free cottonseed treated with lime water to
neutralize acidic nature. After water washing this cottonseeds are used for agriculter purpose
Study & Testing Of Bio-Composite Material Based On Munja FibreIJMER
The incorporation of natural fibres such as munja fiber composites has gained
increasing applications both in many areas of Engineering and Technology. The aim of this study is to
evaluate mechanical properties such as flexural and tensile properties of reinforced epoxy composites.
This is mainly due to their applicable benefits as they are light weight and offer low cost compared to
synthetic fibre composites. Munja fibres recently have been a substitute material in many weight-critical
applications in areas such as aerospace, automotive and other high demanding industrial sectors. In
this study, natural munja fibre composites and munja/fibreglass hybrid composites were fabricated by a
combination of hand lay-up and cold-press methods. A new variety in munja fibre is the present work
the main aim of the work is to extract the neat fibre and is characterized for its flexural characteristics.
The composites are fabricated by reinforcing untreated and treated fibre and are tested for their
mechanical, properties strictly as per ASTM procedures.
Hybrid Engine (Stirling Engine + IC Engine + Electric Motor)IJMER
Hybrid engine is a combination of Stirling engine, IC engine and Electric motor. All these 3 are
connected together to a single shaft. The power source of the Stirling engine will be a Solar Panel. The aim of
this is to run the automobile using a Hybrid engine
Fabrication & Characterization of Bio Composite Materials Based On Sunnhemp F...IJMER
The present day technology demands eco-friendly developments. In this era the
composite material are playing a vital roal in different field of Engineering .The composite materials
are using as a principle materials. Nowaday the composite materials are utilizing as a important
component of engineering field .Where as the importance of the applications of composites is well
known, but thrust on the use of natural fibres in it for reinforcement has been given priority for some
times. But changing from synthetic fibres to natural fibres provides only half green-composites. A
partial green composite will be achieved if the matrix component is also eco-friendly. Keeping this in
view, a detailed literature surveyed has been carried out through various issues of the Journals
related to this field. The material systems used are sunnhemp fibres. Some epoxy and hardener has
been also added for stability and drying of the bio-composites. Various graphs and bar-charts are
super-imposed on each other for comparison among themselves and Graphs is plotted on MAT LAB
and ORIGIN 6.0 software. To determining tensile strengths, Various properties for different biocomposites
have been compared among themselves. Comparison of the behaviour of bio-composites of
this work has been also compare with other works. The bio-composites developed in this work are
likely to get applications in fall ceilings, partitions, bio-degradable packagings, automotive interiors,
sports things (e.g. rackets, nets, etc.), toys etc.
Geochemistry and Genesis of Kammatturu Iron Ores of Devagiri Formation, Sandu...IJMER
The Greenstone belts of Karnataka are enriched in BIFs in Dharwar craton, where Iron
formations are confined to the basin shelf, clearly separated from the deeper-water iron formation that
accumulated at the basin margin and flanking the marine basin. Geochemical data procured in terms of
major, trace and REE are plotted in various diagrams to interpret the genesis of BIFs. Al2O3, Fe2O3 (T),
TiO2, CaO, and SiO2 abundances and ratios show a wide variation. Ni, Co, Zr, Sc, V, Rb, Sr, U, Th,
ΣREE, La, Ce and Eu anomalies and their binary relationships indicate that wherever the terrigenous
component has increased, the concentration of elements of felsic such as Zr and Hf has gone up. Elevated
concentrations of Ni, Co and Sc are contributed by chlorite and other components characteristic of basic
volcanic debris. The data suggest that these formations were generated by chemical and clastic
sedimentary processes on a shallow shelf. During transgression, chemical precipitation took place at the
sediment-water interface, whereas at the time of regression. Iron ore formed with sedimentary structures
and textures in Kammatturu area, in a setting where the water column was oxygenated.
Experimental Investigation on Characteristic Study of the Carbon Steel C45 in...IJMER
In this paper, the mechanical characteristics of C45 medium carbon steel are investigated
under various working conditions. The main characteristic to be studied on this paper is impact toughness
of the material with different configurations and the experiment were carried out on charpy impact testing
equipment. This study reveals the ability of the material to absorb energy up to failure for various
specimen configurations under different heat treated conditions and the corresponding results were
compared with the analysis outcome
Non linear analysis of Robot Gun Support Structure using Equivalent Dynamic A...IJMER
Robot guns are being increasingly employed in automotive manufacturing to replace
risky jobs and also to increase productivity. Using a single robot for a single operation proves to be
expensive. Hence for cost optimization, multiple guns are mounted on a single robot and multiple
operations are performed. Robot Gun structure is an efficient way in which multiple welds can be done
simultaneously. However mounting several weld guns on a single structure induces a variety of
dynamic loads, especially during movement of the robot arm as it maneuvers to reach the weld
locations. The primary idea employed in this paper, is to model those dynamic loads as equivalent G
force loads in FEA. This approach will be on the conservative side, and will be saving time and
subsequently cost efficient. The approach of the paper is towards creating a standard operating
procedure when it comes to analysis of such structures, with emphasis on deploying various technical
aspects of FEA such as Non Linear Geometry, Multipoint Constraint Contact Algorithm, Multizone
meshing .
Static Analysis of Go-Kart Chassis by Analytical and Solid Works SimulationIJMER
This paper aims to do modelling, simulation and performing the static analysis of a go
kart chassis consisting of Circular beams. Modelling, simulations and analysis are performed using 3-D
modelling software i.e. Solid Works and ANSYS according to the rulebook provided by Indian Society of
New Era Engineers (ISNEE) for National Go Kart Championship (NGKC-14).The maximum deflection is
determined by performing static analysis. Computed results are then compared to analytical calculation,
where it is found that the location of maximum deflection agrees well with theoretical approximation but
varies on magnitude aspect.
In récent year various vehicle introduced in market but due to limitation in
carbon émission and BS Séries limitd speed availability vehicle in the market and causing of
environnent pollution over few year There is need to decrease dependancy on fuel vehicle.
bicycle is to be modified for optional in the future To implement new technique using change in
pedal assembly and variable speed gearbox such as planetary gear optimise speed of vehicle
with variable speed ratio.To increase the efficiency of bicycle for confortable drive and to
reduce torque appli éd on bicycle. we introduced epicyclic gear box in which transmission done
throgh Chain Drive (i.e. Sprocket )to rear wheel with help of Epicyclical gear Box to give
number of différent Speed during driving.To reduce torque requirent in the cycle with change in
the pedal mechanism
Integration of Struts & Spring & Hibernate for Enterprise ApplicationsIJMER
The proposal of this paper is to present Spring Framework which is widely used in
developing enterprise applications. Considering the current state where applications are developed using
the EJB model, Spring Framework assert that ordinary java beans(POJO) can be utilize with minimal
modifications. This modular framework can be used to develop the application faster and can reduce
complexity. This paper will highlight the design overview of Spring Framework along with its features that
have made the framework useful. The integration of multiple frameworks for an E-commerce system has
also been addressed in this paper. This paper also proposes structure for a website based on integration of
Spring, Hibernate and Struts Framework.
Microcontroller Based Automatic Sprinkler Irrigation SystemIJMER
Microcontroller based Automatic Sprinkler System is a new concept of using
intelligence power of embedded technology in the sprinkler irrigation work. Designed system replaces
the conventional manual work involved in sprinkler irrigation to automatic process. Using this system a
farmer is protected against adverse inhuman weather conditions, tedious work of changing over of
sprinkler water pipe lines & risk of accident due to high pressure in the water pipe line. Overall
sprinkler irrigation work is transformed in to a comfortableautomatic work. This system provides
flexibility & accuracy in respect of time set for the operation of a sprinkler water pipe lines. In present
work the author has designed and developed an automatic sprinkler irrigation system which is
controlled and monitored by a microcontroller interfaced with solenoid valves.
On some locally closed sets and spaces in Ideal Topological SpacesIJMER
In this paper we introduce and characterize some new generalized locally closed sets
known as
δ
ˆ
s-locally closed sets and spaces are known as
δ
ˆ
s-normal space and
δ
ˆ
s-connected space and
discussed some of their properties
Intrusion Detection and Forensics based on decision tree and Association rule...IJMER
This paper present an approach based on the combination of, two techniques using
decision tree and Association rule mining for Probe attack detection. This approach proves to be
better than the traditional approach of generating rules for fuzzy expert system by clustering methods.
Association rule mining for selecting the best attributes together and decision tree for identifying the
best parameters together to create the rules for fuzzy expert system. After that rules for fuzzy expert
system are generated using association rule mining and decision trees. Decision trees is generated for
dataset and to find the basic parameters for creating the membership functions of fuzzy inference
system. Membership functions are generated for the probe attack. Based on these rules we have
created the fuzzy inference system that is used as an input to neuro-fuzzy system. Fuzzy inference
system is loaded to neuro-fuzzy toolbox as an input and the final ANFIS structure is generated for
outcome of neuro-fuzzy approach. The experiments and evaluations of the proposed method were
done with NSL-KDD intrusion detection dataset. As the experimental results, the proposed approach
based on the combination of, two techniques using decision tree and Association rule mining
efficiently detected probe attacks. Experimental results shows better results for detecting intrusions as
compared to others existing methods
Natural Language Ambiguity and its Effect on Machine LearningIJMER
"Natural language processing" here refers to the use and ability of systems to process
sentences in a natural language such as English, rather than in a specialized artificial computer
language such as C++. The systems of real interest here are digital computers of the type we think of as
personal computers and mainframes. Of course humans can process natural languages, but for us the
question is whether digital computers can or ever will process natural languages. We have tried to
explore in depth and break down the types of ambiguities persistent throughout the natural languages
and provide an answer to the question “How it affects the machine translation process and thereby
machine learning as whole?” .
Today in era of software industry there is no perfect software framework available for
analysis and software development. Currently there are enormous number of software development
process exists which can be implemented to stabilize the process of developing a software system. But no
perfect system is recognized till yet which can help software developers for opting of best software
development process. This paper present the framework of skillful system combined with Likert scale. With
the help of Likert scale we define a rule based model and delegate some mass score to every process and
develop one tool name as MuxSet which will help the software developers to select an appropriate
development process that may enhance the probability of system success.
Material Parameter and Effect of Thermal Load on Functionally Graded CylindersIJMER
The present study investigates the creep in a thick-walled composite cylinders made
up of aluminum/aluminum alloy matrix and reinforced with silicon carbide particles. The distribution
of SiCp is assumed to be either uniform or decreasing linearly from the inner to the outer radius of
the cylinder. The creep behavior of the cylinder has been described by threshold stress based creep
law with a stress exponent of 5. The composite cylinders are subjected to internal pressure which is
applied gradually and steady state condition of stress is assumed. The creep parameters required to
be used in creep law, are extracted by conducting regression analysis on the available experimental
results. The mathematical models have been developed to describe steady state creep in the composite
cylinder by using von-Mises criterion. Regression analysis is used to obtain the creep parameters
required in the study. The basic equilibrium equation of the cylinder and other constitutive equations
have been solved to obtain creep stresses in the cylinder. The effect of varying particle size, particle
content and temperature on the stresses in the composite cylinder has been analyzed. The study
revealed that the stress distributions in the cylinder do not vary significantly for various combinations
of particle size, particle content and operating temperature except for slight variation observed for
varying particle content. Functionally Graded Materials (FGMs) emerged and led to the development
of superior heat resistant materials.
Energy Audit is the systematic process for finding out the energy conservation
opportunities in industrial processes. The project carried out studies on various energy conservation
measures application in areas like lighting, motors, compressors, transformer, ventilation system etc.
In this investigation, studied the technical aspects of the various measures along with its cost benefit
analysis.
Investigation found that major areas of energy conservation are-
1. Energy efficient lighting schemes.
2. Use of electronic ballast instead of copper ballast.
3. Use of wind ventilators for ventilation.
4. Use of VFD for compressor.
5. Transparent roofing sheets to reduce energy consumption.
So Energy Audit is the only perfect & analyzed way of meeting the Industrial Energy Conservation.
An Implementation of I2C Slave Interface using Verilog HDLIJMER
The focus of this paper is on implementation of Inter Integrated Circuit (I2C) protocol
following slave module for no data loss. In this paper, the principle and the operation of I2C bus protocol
will be introduced. It follows the I2C specification to provide device addressing, read/write operation and
an acknowledgement. The programmable nature of device provide users with the flexibility of configuring
the I2C slave device to any legal slave address to avoid the slave address collision on an I2C bus with
multiple slave devices. This paper demonstrates how I2C Master controller transmits and receives data to
and from the Slave with proper synchronization.
The module is designed in Verilog and simulated in ModelSim. The design is also synthesized in Xilinx
XST 14.1. This module acts as a slave for the microprocessor which can be customized for no data loss.
Discrete Model of Two Predators competing for One PreyIJMER
This paper investigates the dynamical behavior of a discrete model of one prey two
predator systems. The equilibrium points and their stability are analyzed. Time series plots are obtained
for different sets of parameter values. Also bifurcation diagrams are plotted to show dynamical behavior
of the system in selected range of growth parameter
Discrete Model of Two Predators competing for One Prey
Cf32949954
1. International Journal of Modern Engineering Research (IJMER)
www.ijmer.com Vol.3, Issue.2, March-April. 2013 pp-949-954 ISSN: 2249-6645
Economic efficiency calculation and Scenarios for the installation and
direction of solar thermal systems at the example of a reference
building
Sejdo Ferati
Department of Engineering, University of Applied Sciences Brandenburg, Germany
Abstract: The article examines different possibilities of the installation and the azimuth of solar thermal systems on a
rooftop at the example of a reference building. The outcome of a different azimuth and installation are different costs of
solar energy, savings of wood pellets and different degrees of system efficiency. In this way the economic efficiency of a
solar thermal installation can be influenced strongly.
Keywords: Solar Thermal Installation, installation and direction of the solar thermal installation, economic efficiency of
the solar thermal installation, costs of solar energy, savings of wood pellets and degrees of system efficiency
I. INTRODUCTION
Environment-friendly solar thermal energy which is gained from the solar irradiation onto the own roof becomes
increasingly more attractive. The sun is an inexhaustible source of energy. Thermally gained energy can be produced
increasingly more favorably by most modern technique through a solar thermal system. The quality of the systems is
safeguarded and controlled by norms of the European Union. In this way the independence on fossil fuel and of their prices
increases. CO2-emissions resulting from the combustion of fossil energy carriers are reduced. The installation of solar
thermal systems can partly be supported by state measures. The living comfort increases and last but not least new jobs can
be created in the domestic economy.
The figure shows a model of a complete pellet boiler plant with solar support for the hot water generation and for
the heating support (Company August Brötje GmbH) [2].
Figure 1: Pellet boiler with solar support to hot water generation and heating support [2]
Basics of the simulation of the system
With the help of Dr. Valentin energy software a simulation of the system is carried out [12].
By increasing improvement of the thermal insulation at buildings a reduced energy demand for the heating can be
achieved. In this way the energy demand for the hot water generation gets more importance. This demand in part can be
produced by thermal solar systems which convert the solar irradiation with the help of collectors into heat. At present these
systems can produce an annual energy yield of 350-500 kilowatt-hours per m2 collector surface area. This leads to a decrease
of the CO2-emissions of up to 150 kg [12].
Thermal solar systems convert solar energy with the help of collectors into heat. Then the produced heat is
transported over pipelines into a so-called buffer storage. The energy losses occurring from the production up to the storage
should be held as small as possible. The losses, resulting from the relation between the usable energy and the irradiated
energy can be assessed with the help of degree of efficiency of the system. A solar system is established according to its
mode of operation:
With a collector the solar irradiation is absorbed and converted into heat. The so won energy is transported over a
net of pipelines and heat exchangers to a storage tank. The storage tank has the task of balancing the temporal variations of
energy offer and energy demand. For a maximum utilization of the solar irradiation a control system is useful, that turns on a
circulating pump as soon as a temperature difference arises between collector and storage tank. Thus the heat transportation
to the storage tank is guaranteed.
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Description of the reference building
The single-family house completely with basement is constructed in massive design on strip foundation. The walls
consist of burned stones (Cellar: Lime sandstone). The floors consist of reinforced concrete, the grounds are made of floating
floor and tiled (Attic: fitted carpeting). The stairs consist of reinforced concrete with timber sheeting. The attic is fully
developed and is to be reached over the staircase. The cellar can also be reached over the staircase. Additionally there are
stairs outside the house which lead to the cellar. The external walls have got brick facing. The building has a gable roof with
clay bricks. The chimneys consist of burned stones.
Degree of efficiency and solar fraction
The degree of efficiency results from the relation between energy put out to the irradiated energy.
The degree of efficiency of the collector circuit results from the relation between the energy output of the collector
circuit over the heat exchanger to the irradiated energy (irradiated onto the collector surface).
The degree of efficiency of the system results from the relation between the energy output of the solar system to the
rradiated energy (irradiated onto the collector surface).
The energy output gained from the solar system is that energy which is passed on from the solar storage tank to the
standby storage tank.
The solar fraction results from the relation between the energy provided by the stand by storage tank of the solar
system to the sum of all energies provided to the standby system (Solar system and upstream with conventional systems).
The energy delivery for the heating of the drinking water is the energy which is necessary to get the temperature of
the cold water to the temperature of the tapped drinking water. Losses are not considered here.
The used combustible is the combustible which is necessary to heat the standby storage tank to the nominal
temperature. The heat losses of the storage tank and the degree of efficiency of the kettle are considered here.
Calculation of Economic Efficiency according to the cash value method (with T*SOL) [12]
- Investment Costs = Installation Costs – Subsidy
- yearly Operating Costs = Pump Performance*Operating Time*Electricity Costs
The cash value (CV) of a price-dynamic payment sequence Z, Z r, Z r2... over T years (Lifespan) is calculated as follows
(according to VDI 2067 [14]):
Cash value CV = Z b( T,q,r)
Cash value factor b (T, q, r)
q: Simple interest factor on capital (e.g. 1,08 at 8 % of simple interest on capital)
r: Price change factor (e.g. 1,1 at 10 % of price change)
Capital value of the total investment (C):
C = sum of the cashl value of the price-dynamic payment sequence over the lifespan
+ promotions
- Investments
The pay-back time is the period the system must operate for the investment in order to yield a cash value of zero.
Pay-back times of more than 40 years are not included here [12].
In order to calculate the heating price, the cash value of the costs must be calculated:
CV of the costs = Investments + Cash value of the Operating and Maintenance Costs.
If the Cash value of the costs is converted into a constant payment sequence (r=1) over the lifespan, then Z turns out
for this consequence:
Z = CV of the costs / b(T, q, r).
According to VDI 2067 is valid:
For r =1 be comes 1/b(T, q, r) for the annuity factor a(q, T) = qT (q-1) / (qT-1).
The heating price then represents itself as follows:
Heating price
In the following the components of the system - as indicated in the figure - are described:
-Collector: Manufacturer August Brötje, Type: Solar Plus HP 20, denomination: Tube collector Parameter: Gross face 2,84
m2, reference area 2,16 m2, specific heat capacity 4300 Ws/(m2K), collector field volume flow: 40 (l/h)/m2, medium: Water
Glycol, resulting specific heat capacity: 3588 Ws/(kg K) [2]
-tank: Pellets-Central heating boiler, Manufacturer Vaillant [13], Type: renerVIT VKP 202, capacity: 20 kilowatts
-Hot water tank: Standard, volume: 300 l
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-Buffer storage: Standard, volume: 800 l
-Hot Water need: average day consumption: 200 l, nominal temperature hot water: 50 °C, interpretation for single-family
home (morning top).
Simulation results of the reference building [12]:
Figure 2: Fraction heating, hot water, total & saving natural gas [12]
Solar energy consumption as percentage of total consumption
Figure 3: Solar energy consumption as percentage of total consumption [12]
Energy balance schematic
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www.ijmer.com Vol.3, Issue.2, March-April. 2013 pp-949-954 ISSN: 2249-6645
Figure 4: Energy balance schematic [12]
Financial analysis:
System
System yield 6, 26 MWh
Active surface area 22, 74 m2
Yearly electricity consumption for additional energy 610, 40 kWh/a
Annual fuel savings 1.520,40 kg
Financial analysis parameters
Lifespan 20 Years
Interest on capital 2, 5 %
Energy cost escalation rate 3, 0 %
Running cost escalation rate
1, 5 %
Costs (Cash value)
Investments -52.000, 00 €
Subsidy 3.750,00 €
Savings 3.108,00 €
Running costs
-15.410, 00 €
Net present value -60.552, 00 €
Amortization period No amortization
Cost of solar energy 0, 65 €/kWh
Provisional Result
The variant does not show any amortization for a period of 20 years so that this variant is uneconomical.
II. SCENARIO „ A", TILT ANGLE 35° (DEGREE) = CONST., AZIMUTH = VARIABLE
The tilt angle of the solar thermal collectors on the roof (roof parallel system) is 35 °. That is the existence of the
reference building. The Scenario A shows the dependence of the costs of solar energy, the saving of wood pellets and the
system efficiency of the solar thermal system on the azimuth of the reference building into the respective cardinal point.
Table 1: Dependence of the costs of solar energy, the saving of wood pellets and the system efficiency of the solar thermal
system on the azimuth of the reference building
Azimuth Cost of solar energy Wood pellets savings System efficiency
° (Degree) 0,01 x €/kWh 0,1 x t (Ton) %
135 ° 71 14,064 30,3
175 ° 65 15,226 31,2
180 ° 65 15,277 31,3
225 ° 70 14,398 30,7
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Diagram 1: Dependence of the costs of solar energy, the saving of wood pellets and the system efficiency of the solar
thermal system on the azimuth of the reference building
Provisional Result
The optimal results for the costs of solar energy, the saving of wood pellets and the system efficiency are achieved
at an azimuth of 180° of the reference building (to south).
III. SCENARIO „B", TILT ANGLE = VARIABLE, AZIMUTH 175° (DEGREE) = CONST.
The azimuth of the solar thermal collectors on the roof (roof parallel system) is 175 °. That is the existence of the
reference building. The Scenario B shows the dependence of the costs of solar energy, the saving of wood pellets and the
system efficiency of the solar thermal system on the tilt angle of the solar thermal system on the roof.
Table 2: Dependence of the costs of solar energy, the saving of wood pellets and the system efficiency of the solar thermal
system on the tilt angle
Azimuth Cost of solar energy Wood pellets savings System efficiency
° (Degree) 0,01 x €/kWh 0,1 x t (Ton) %
25 ° 69 14,579 30,1
30 ° 67 14,921 30,6
35 ° 65 15,209 31,2
40 ° 64 15,421 31,8
45 ° 65 15,209 31,2
50 ° 63 15,636 32,9
Diagram 2: Dependence of the costs of solar energy, the saving of wood pellets and the system efficiency of the solar
thermal system on the tilt angle
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Provisional Result
The optimal results for costs of solar energy, the saving of wood pellets and the system efficiency are achieved with
a tilt angle of the solar thermal system on the roof of approx. 50 °.
IV. Conclusion
Solar power is good for the human being and for the environment. With a solar thermal system on the own roof a secure and
clean kind of heat supply is guaranteed for water heating and heating support. With the correct azimuth of the house to south
and the correct tilt angle of the solar thermal system on the roof the costs of solar energy, saving of wood pellets and the
system efficiency can be optimized.
REFERENCES
[1] Abele, E. u.a.: EcoDesign. Berlin: Springer-Verlag, 2008
[2] August Brötje GmbH, August-Brötje-Straße 17, 26180 Rastede August Brötje GmbH – offizielle Seite: www.broetje.de
[3] DIN 4710 (01/2003): Statistiken meteorologischer Daten zur Berechnung des Energiebedarfs von heiz- und raumlufttechnischen
Anlagen in Deutschland
[4] Döring, S.: Pellets als Energieträger. Berlin: Springer-Verlag, 2010
[5] Dratwa, F., u.a.: Energiewirtschaft in Europa. Berlin: Springer-Verlag, 2010
[6] EEG (10/2008): Erneuerbare-Energien-Gesetz , Gesetz für den Vorrang Erneuerbarer Energien
[7] EnEv 2009: Energieeinsparungsverordnung
[8] Kaltschmitt, M., Streicher, W., Wiese, A. (Hrsg.): Erneuerbare Energien. 4. Auflage (Berlin: Springer-Verlag, 2006)
[9] Oberzig, K.: Solarwärme, Heizen mit Sonne. Stiftung Warentest Berlin: Verlagsherstellung: Rita Brosius, 2012
[10] Pelte, D.: Die Zukunft unserer Energieversorgung. 1. Auflage (Wiesbaden: Vieweg + Teubner | GWV Fachverlage GmbH, 2010)
[11] Quaschning, V.: Regenerative Energiesysteme. 6. Neu bearb. u. erw. Auflage (München: Hanser Verlag, 2009)
[12] Simulationssoftware, Dr. Valentin Energiesoftware GmbH, Stralauer Platz 34, 10243 Berlin, Studentenversion (inkl.
Benutzerhandbücher): T*SOL Pro 5.0
[13] Vaillant Deutschland GmbH & Co. KG, Berghauser Str. 40, 42859 Remscheid Vaillant Deutschland GmbH & Co. KG – offizielle
Seite: www.vaillant.de
[14] VDI 2067 – Blatt 1 Entwurf (09-2010): Wirtschaftlichkeit gebäudetechnischer Anlagen, Grundlagen und Kostenberechnung
[15] VDI 2067 – Blatt 10 Entwurf (10-2011): Wirtschaftlichkeit gebäudetechnischer Anlagen, Energiebedarf von Gebäuden für Heizen,
Kühlen, Be- und Entfeuchten
[16] VDI 2067 – Blatt 12 (06-2000): Wirtschaftlichkeit gebäudetechnischer Anlagen, Nutzenergiebedarf für die Trink wassererwärmung
[17] VDI 2067 – Blatt 20 (08-2000): Wirtschaftlichkeit gebäudetechnischer Anlagen, Energieaufwand der Nutzenübergabe bei
Warmwasserheizungen
[18] VDI 2067 – Blatt 22 (02-2011): Wirtschaftlichkeit gebäudetechnischer Anlagen, Energieaufwand der Nutzenübergabe bei Anlagen
zur Trinkwassererwärmung
[19] VDI 2067 – Blatt 40 Entwurf (01-2012): Wirtschaftlichkeit gebäudetechnischer Anlagen, Energieaufwand der Erzeugung
[20] VDI 2078 – Entwurf (03/2012) Berechnung von Kühllast und Raumtemperaturen von Räumen und Gebäuden
[21] VDI 6020 – Blatt 1 (05/2001): Anforderungen an Rechenverfahren zur Gebäude- und Anlagensimulation
[22] VDI 6025 (11/1996): Betriebswirtschaftliche Berechnungen für Investitionsgüter und Anlagen
AUTHOR
Sejdo Ferati received his M.Sc. from the Faculty of Technical Sciences in Novi Sad, Serbia,
his M.Eng. from the Beuth Hochschule für Technik (University of Applied Sciences) in Berlin, Germany and
his Dr. degree from the Comenius University in Bratislava, Slovakia.
He is honorary professor at the Fachhochschule Brandenburg (University of Applied Sciences) in Brandenburg an der Havel,
Germany.
He is Member of The Association of German Engineers (VDI)
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