Abstract
In this communication, a thermal model has been developed to predict the performance of hybrid photovoltaic-thermal (PV/T) greenhouse (roof type even span) dryer under forced mode. Based on energy balance, analytical expressions for temperatures of greenhouse air and produce (grape) surface as a function of design and climatic parameters have been developed. The analytical expressions for instantaneous and overall thermal efficiencies have also been developed. The experimental validations have also been carried out for greenhouse room air temperature, crop produce temperature and moisture evaporated etc. under composite climate of New Delhi (28°35'N, 77°12'E, 216 m above MSL). It has been observed that the developed thermal model was in well agreement with experimental data. It has been found that the overall thermal efficiency of hybrid PV/T greenhouse dryer varies from 33 percent to 37.8 percent.
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