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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
EXPERIMENTAL ANALYSIS OF 1ST AND 2ND LAWS OF THERMODYNAMICS APPLIED TO A PHOTOVOLTAIC SYSTEM IN THE CITY OF SÃO LUÍS - MA
Submission Author:
Carlos Vital Pinto Costa Junior , MA
Co-Authors:
Carlos Vital Pinto Costa Junior, Lourival Filho, João Victor Carvalho, Manuelle da Silva Serejo
Presenter: Carlos Vital Pinto Costa Junior
doi://10.26678/ABCM.ENCIT2020.CIT20-0595
Abstract
The increasing climate change awareness and the impacts of human activities on the environment placed solar photovoltaic energy in prominence. Solar energy is considered a clean energy source with low impacts on the environment. Nevertheless, the process of converting sunlight into electricity presents energy losses which have a negative influence on the efficiency of photovoltaic systems. Therefore, this experimental study investigated the energy and exergy performance of an off-grid photovoltaic system located at the State University of Maranhão in São Luís - MA. The results showed the operation temperature of the photovoltaic module reached higher values in the midday hours; the same pattern was obtained in all the days of experiments. The energy and exergy efficiency achieved higher values in the first hours in the morning and decreased reaching the lowest values at 13h00. The decrease in energy and exergy efficiencies in the midday hours is a result of thermal irreversibilities growth related to high operating temperatures.
Keywords
energy efficiency, Exergy efficiency, photovoltaic systems, Solar Energy
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