Heat Transfer Modelling of a Novel Concentrating Photovoltaic System

2010 ◽  
Author(s):  
Tapas Kumar Mallick ◽  
Sendhil Kumar Natarajan
Keyword(s):  
Solar Cell ◽  
Solar Radiation ◽  
Ambient Temperature ◽  
Element Model ◽  
Photovoltaic System ◽  
Cell Temperature ◽  
Pv System ◽  
Various Boundary Conditions ◽  
Dimensional Finite Element ◽  
The Given

In this work, an experimentally validated two dimensional finite element model was refined to predict the solar cell temperature of the novel Concentrating Photovoltaic’s (CPV) system. The corresponding 2-D numerical simulation of solar cell temperature for novel concentrating PV system of 10x was presented in this work. Based on the 2-D thermal model, solar cell temperature has been predicted for various boundary conditions. In addition to that, the effects of the ambient temperature and the solar radiation on the solar cell temperature have also been investigated for the proposed CPV system. Based on the influencing parameters of ambient temperature and solar radiation, a separate solar cell temperature correlation has been proposed to predict the cell temperature for the given range of parameters.

Structural Analysis of a Tracking Photovoltaic System with a Pedestal Solar Tracker

2014 ◽  
Vol 493 ◽  
pp. 361-366
Author(s):  
Chih Kuang Lin ◽  
Chen Yu Dai
Keyword(s):  
Solar Radiation ◽  
Structural Integrity ◽  
Natural Frequencies ◽  
Elevation Angle ◽  
Photovoltaic System ◽  
Structural Deformation ◽  
Pv System ◽  
Element Analysis ◽  
Solar Tracker ◽  
The Given

The structural integrity and deformation-induced misalignment of solar radiation for a tracking photovoltaic (PV) system under self-weight is investigated using a finite element analysis (FEA) approach. Gravity is applied to calculate the stress distribution and structural deformation. Misalignment of solar radiation induced by structural deformation is also calculated. Moreover, to avoid damages caused by resonance, natural frequencies of vibration for the given tracking PV system are also determined. Strain changes are measured experimentally at two selected locations in the given solar tracker during field operation for comparison with the simulation results. A reasonable agreement between the simulations and experimental measurements is found such that the constructed FEA model is validated to be effective in assessment of the structural integrity for PV systems under self-weight. No structural failure is predicted for all components in the given solar tracker under the given loading condition according to the von Mises failure criterion. An agreement in the trend of variation of misalignment and resultant displacement of PV modules is found. Considering the effect of self-weight only, the maximum misalignment of solar radiation is of 0.275o at elevation angle of 45o when rotating the solar tracker from 0o to 75o. It is expected that such a misalignment value will not cause a significant degradation of power generation for a PV system. The range of natural frequencies of the first six vibration modes for the given PV system is from 3.85 Hz to 11.4 Hz.

Experimental Study and Numerical Analysis of Sihui Metro Depot and the Superstructure

2012 ◽  
Vol 226-228 ◽  
pp. 176-180
Author(s):  
Jing Zhang ◽  
Bin Zhang ◽  
Ying Hua Liu ◽  
Long Qi Wang ◽  
Yu Bin Wu
Keyword(s):  
Time History ◽  
Field Tests ◽  
Element Model ◽  
Test Analysis ◽  
3 Dimensional ◽  
Dimensional Finite Element ◽  
Calculation Results ◽  
History Of ◽  
The Given ◽  
The Waves

Field tests were carried out on Sihui metro depot of Beijing metro line 1 and its superstructure. The acceleration time history of sleepers and floors of the building was obtained, and the waves-propagation laws of building were studied through the tests. Test analysis shows that the structure vibrations show zigzag tendencies ascends with the height of the building. Based on current situation of Sihui metro depot, a metro-soil-building 3-dimensional finite element model is established on ANSYS. By using actual acceleration of sleepers as inputs, the dynamic responds rule of the superstructure is obtained. Compared calculation results with the experimental results, the given numerical model can predict the vibrations of the building induced by moving trains quite well. This method can provide guidance and technical support for future development of superstructure.

scholarly journals Theoretical Investigation of the Temperature Limits of an Actively Cooled High Concentration Photovoltaic System

Energies ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1902 ◽  
Author(s):  
Asmaa Ahmed ◽  
Katie Shanks ◽  
Senthilarasu Sundaram ◽  
Tapas Kumar Mallick
Keyword(s):  
Solar Cell ◽  
Concentration Ratio ◽  
Photovoltaic System ◽  
Thermal System ◽  
Outlet Temperature ◽  
Water Mixture ◽  
High Concentration ◽  
Cell Temperature ◽  
Photovoltaic Thermal System ◽  
Different Types

Concentrator photovoltaics have several advantages over flat plate systems. However, the increase in solar concentration usually leads to an increase in the solar cell temperature, which decreases the performance of the system. Therefore, in this paper, we investigate the performance and temperature limits of a high concentration photovoltaic Thermal system (HCPVT) based on a 1 cm2 multi-junction solar cell subjected to a concentration ratio from 500× to 2000× by using three different types of cooling fluids (water, ethylene glycol and water mixture (60:40), and syltherm oil 800). The results show that, for this configuration, the maximum volumetric temperature of the solar cell did not exceed the manufacturer’s recommended limit for the tested fluids. At 2000× the lowest solar cell temperature obtained by using water was 93.5 °C, while it reached as high as 109 °C by using syltherm oil 800, which is almost equal to the maximum operating limit provided by the manufacturer (110 °C). Overall, the best performance in terms of temperature distribution, thermal, and electrical efficiency was achieved by using water, while the highest outlet temperature was obtained by using syltherm oil 800.

Thermodynamic Performance of a Photovoltaic System

2008 ◽  
Author(s):  
Anand S. Joshi ◽  
Ibrahim Dincer ◽  
Bale V. Reddy
Keyword(s):  
Solar Radiation ◽  
Fill Factor ◽  
Exergy Analysis ◽  
Power Conversion ◽  
Thermodynamic Characteristics ◽  
Photovoltaic System ◽  
Pv System ◽  
Pv Panel ◽  
Thermodynamic Performance ◽  
Current Area

In this paper, an attempt is made to investigate the thermodynamic characteristics of a photovoltaic (PV) system based on exergy. A new efficiency is developed that is useful in studying the PV performance and possible improvements. Exergy analysis is applied to a PV system and its components, in order to evaluate the effect of various parameters e.g., voltage, current, area of the PV panel, fill factor and ambient temperature on exergy efficiency. Effect of solar radiation on power conversion efficiency is also evaluated.

scholarly journals ESTUDO DA EFICIÊNCIA ENERGÉTICA DE CÉLULAS FOTOVOLTAICAS EM FUNÇÃO DA RADIAÇÃO SOLAR NO CENTRO-OESTE BRASILEIRO

2017 ◽  
Vol 2 (7) ◽  
pp. 115
Author(s):  
Amaury De Souza ◽  
Flavio Aristone
Keyword(s):  
Solar Radiation ◽  
Photovoltaic Cell ◽  
Photovoltaic System ◽  
Solar Irradiation ◽  
Energetic Efficiency ◽  
Voltage Response ◽  
Pv System ◽  
Mato Grosso ◽  
Cell Efficiency ◽  
Mato Grosso Do Sul

Para o presente trabalho foi desenvolvido um estudo de um sistema fotovoltaico, com armazenamento de energia, na Universidade Federal de Mato Grosso do Sul, Campus Campo Grande, durante o ano de 2014. Foi avaliada a eficiência de painéis fotovoltaicos em função dos valores da componente de radiação solar global no plano horizontal de incidência; das temperaturas ambiente e de operação do painel; e da tensão e corrente do sistema fotovoltaico. Os resultados mostram que a eficiência média mensal oscilou entre 8,65 e 9,17%, com média anual de 8,84%. O módulo apresentou eficiência média 50% inferior aos valores propostos pelos fabricantes.Palavras-chave: Eficiência Fotovoltaica Celular; Radiação Solar; Conversão da Irradiação Solar; Temperatura da Célula Fotovoltaica.STUDY OF ENERGETIC EFFICIENCY OF PHOTOVOLTAIC CELLS AS A FUNCTION OF SOLAR RADIATION IN BRAZIL’S MIDWEST REGIONABSTRACTIn this paper, we developed a study of a photovoltaic system (PV) with energy storage installed at the Federal University of Mato Grosso do Sul, campus of Campo Grande, during 2014. It has been evaluated the efficiency of photovoltaic panels according to the data of the solar radiation components in the horizontal plane of incidence, the local and operating temperatures, and the current - voltage response of the PV system. The results show that the average monthly efficiency oscillated between 8.65% and 9.17%, with an annual average of 8.84%. The modules showed an average efficiency that is 50% smaller compared to the values provided by manufacturers.Keywords: Photovoltaic Cell Efficiency; Solar Irradiation; Conversion of Solar Irradiation; Photovoltaic Cell Temperature.ESTUDIO DE LA EFICIENCIA ENERGÉTICA DE CÉLULAS FOTOVOLTAICAS COMO FUNCIÓN DE LA RADIACIÓN SOLAR EN LA REGIÓN CENTRAL DE BRASILRESUMEN En el presente trabajo se ha desarrollado un estudio para un sistema fotovoltaico con almacenamiento de energía, durante el año 2014 en el campus de Campo Grande de la Universidad Federal de Mato Grosso do Sul. Se evaluó la eficiencia de paneles fotovoltaicos en función de los valores de la componente de radiación solar global en el plano horizontal de incidencia; de las temperaturas ambiente y de funcionamiento del panel; y de la tensión y corriente generada en el sistema fotovoltaico. Los resultados muestran que la eficiencia media mensual osciló entre 8.65% y 9.17%, con una media anual de 8.84%. El módulo ha presentado una eficiencia media 50% inferior a los valores propuestos por los fabricantes.Palabras clave: Eficiencia de Células Fotovoltaicas; Irradiación Solar; Conversión de Irradiación Solar; Temperatura de las Células Fotovoltaicas.

scholarly journals Thermal Modeling of Opaque and Semi-Transparent Photovoltaic (PV) Module

2019 ◽  
Vol 8 (12) ◽  
pp. 3271-3276
Keyword(s):  
Solar Cell ◽  
Energy Requirement ◽  
Electrical Power ◽  
Electrical Energy ◽  
Photovoltaic Module ◽  
Performance Parameters ◽  
Cell Temperature ◽  
Pv System ◽  
Electrical Efficiency ◽  
Pv Module

Photovoltaic (PV) module is one of the simplest technologies to convert the solar energy into the useful electrical energy. In the present paper, an attempt has been made to develop a simplified analytical expression for solar cell temperature and solar cell electrical efficiency of opaque and semi-transparent photovoltaic module in the terms of design and climatic parameters. Based on the energy balance of opaque and semi-transparent PV module, the performance parameters, namely, solar cell temperature, solar cell electrical efficiency, module efficiency and electrical power output have been evaluated for a typical clear day of May month of New Delhi climatic condition data taken from IMD (Indian Meteorological Department), Pune, India. The numerical simulations have been made on the MATLAB software. Based on the numerical computation, the effect of back cover opaque and semitransparent tedlar of module on the performance parameters has been investigated. From the results and discussion, it is found that the performance of photovoltaic module is very sensitive to the module temperature. Further, it is concluded that the semi-transparent photovoltaic module is more efficient than the opaque one. Thus, by the application of semi-transparent PV module in the design of stand-alone and rooftop PV system, the overall energy requirement and performance can be improved for same occupied area.

scholarly journals Thermal building upgrade with off-grid PV system: a Polish case

2021 ◽  
Vol 14 (7) ◽  
Author(s):  
Sylwia Wciślik ◽  
Dagmara Kotrys-Działak
Keyword(s):  
Solar Radiation ◽  
Alternative Energy ◽  
Net Present Value ◽  
Photovoltaic System ◽  
Solar Irradiation ◽  
Total Solar Radiation ◽  
Pv System ◽  
Alternative Energy Sources ◽  
High Investment ◽  
The Difference

AbstractNowadays, one of the basic requirements for thermally upgraded buildings involves limitation in CO2 emission even by over 90%. To fulfil these criteria, it is necessary to use alternative energy sources and photovoltaics constitutes a reasonable option for this. This paper addresses an analysis of the efficiency and profitability of a photovoltaic system located in the geometric center of Europe-Poland, where the intensity of solar irradiation is not very high compared to other European countries. The difference of total solar radiation density between Poland and Malta is 49.2%, from analysis based on SolarGIS base. The PV Lighthouse calculator was used for global power density and photon current examination for a Polish city and locations of the highest and the lowest solar radiation values, Malta and Finland, respectively. This case study concerns a thermally upgraded building; a gas boiler was replaced by a heat pump supported by an off-grid PV system. To achieve a reduction in CO2 emission of 90%, it is necessary to install 182 PV cells, which generates high investment costs. An investment is entirely profitable with 70% of funding with Simple Pay Back Time, SPBT~7 years although Net Present Value, NPV>0; Internal Rate of Return, IRR=10.6%.

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