ANALYTICAL MODEL FOR BLOCKING ULTRAVIOLET RADIATION ON PHOTOVOLTAIC MODULE
Keywords:Photovoltaic effect, Ultraviolet radiation, Ultraviolet absorber, Encapsulant, Cell temperature
A photovoltaic (PV) system uses sunlight to produce electrical energy. The ultraviolet (UV) part of sunlight has a large amount of energy that ultimately causes a decrease in the PV module’s life due to degradation of the encapsulant, increases cell temperature, and ultimately reduced the PV module’s efficiency. This research proposes an analytical model/framework to reduce the adverse effects of UV radiation by blocking its incidence on PV modules using UV filters. For verification of the model, experimental results are also included in this paper. In the experiments, PV modules are saved from UV radiations by placing a transparent acrylic sheet over them, along with a coating of commercially available varnish. In this way, the PV module only receives visible and IR radiations. The results show a 4.6 % reduction in cell temperature by blocking UV radiations. So due to this less exposure to UV radiations on the PV module, the panel’s life is increased along with the reduction in each cell’s temperature. This research work is very helpful in increasing the life and performance of PV modules.
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