Theoretical Study to improve electrical and thermal efficiency of a photovoltaic-thermal hybrid system PV/T in the region of Algerian Sahara (Ouargla)
Keywords:
PVT system, hybridization, thermal convection, Thermal and electrical efficiency.Abstract
Solar energy stands as one of the most significant renewable energy sources, with the sun's daily radiation potentially covering the global energy consumption for years. It offers a clean, pollution-free, inexhaustible, and widely available source of energy. Solar energy can be directly converted into electricity through photovoltaic cells or into heat via various solar collectors. Due to the low efficiency of photovoltaic (PV) stations resulting from the high surface temperature of solar cells, this study embarks on a theoretical exploration of a hybrid photovoltaic-thermal (PVT) system in the Ouargla region, characterized by its dry and hot summer climate, located at 31.15° longitude and 5.24° latitude.
Electricity is generated through solar cells, while heat is concurrently absorbed by a heat exchanger, enhancing the PV cells' efficiency by reducing their surface temperature and effectively utilizing the heat through a solar collector. We found that hybridization reduces the solar panel's temperature by about 30°C and increases the electrical efficiency by approximately 2.5% on a summer day.
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