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Output Estimation of Concentrator Photovoltaic Using Mappings of Environmental Factors and Performance Ratio

100%
Nomura K., Ota Y., Minemoto T., Nishioka K.
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vol. 125
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issue 4
1021-1023
EN
Estimation of the output energy of concentrator photovoltaic system is difficult, because the output energy of concentrator photovoltaic system installed outdoors is influenced by various environmental factors. A new method to estimate the output energy is proposed using a contour map of environmental factors. The contour map of estimated output energy was quite similar to that of experimentally-measured output energy. The error ratio of the estimated output energy to the actual output energy was only - 0.14%. The result indicates that this method is useful to estimate the output energy of CPV systems.
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Influence of Physical Characteristics οf Flat Aluminum Concentrators on Energy Efficiency of PV/Thermal Collector

100%
Kostic L., Pavlovic T., Pavlovic Z.
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EN
In this paper the results of the influence of physical characteristics of flat plate solar radiation concentrators made of Al sheet and Al foil on energy efficiency of PV/thermal collector are presented. The measurements results obtained by means of scanning electron microscope, reflectance and chemical composition of solar radiation concentrators are given. Optimal position of solar radiation concentrators and appropriate thermal and electrical energy of PV/thermal collector were determined. Total generated thermal and electrical energy during the day by PV/thermal collector with concentrators in optimal position are higher than the total generated thermal and electrical energy obtained by PV/thermal collector without concentrators.
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