Heat transfer analysis in a calorimeter for concentrated solar radiation measurements |
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Authors: | CA Estrada OA Jaramillo R Acosta CA Arancibia-Bulnes |
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Affiliation: | aUniversidad Nacional Autónoma de México, Centro de Investigación en Energía, Privada Xochicalco S/N, Col. Centro. Temixco, Morelos 62580, Mexico;bUniversidad de Quintana Roo, Boulevard Bahia s/n Esq. I. Comonfort, Chetumal Quintana Roo 77019, Mexico |
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Abstract: | A calorimeter was built for measuring the concentrated solar power produced by a point focus solar concentrator that was developed at CIE – UNAM. In order to obtain a thermal characterization of the calorimeter a theoretical and experimental heat transfer study is carried out. This study addresses the heat transfer in the circular flat plate of the calorimeter, which acts as receiver for the concentrating system. Temperatures are measured at different points of this plate and fit with a theoretical model that considers heat conduction with convective and radiative boundary conditions. In particular, it is possible to calculate the temperature distribution on the irradiated surface. This allows to examine the validity of the assumptions of cold water calorimetry, which was the technique applied to this system in previous works. |
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Keywords: | Calorimeter Cold water calorimetry Point focus concentrator |
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