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The solar air heater (SoAH) absorbs the solar radiation and convert it into thermal energy. The drawback of solar radiation is its uneven distribution in time and it is the main roadblock for further expansion of solar energy. The technical feasibility of SoAH with thermal energy storage in the phase change material (PCM) is demonstrated in the present paper. This integrated SoAH was operated for 11 h from 10:30 to 21:30 h in April 2018 under the meteorological conditions of Gandhinagar (23.16°N, 77.67°E). The performance of SoAH with PCM is evaluated using energy and exergy analysis. The maximum energy efficiency and exergy efficiency of SoAH were found to be 62% and 9.5% respectively during the peak sunshine hours of the day. The percentage of energy recovered from the thermal storage was found to be 25.8%. The exergy efficiency of the storage system was found to be 13%.

Experimental evaluation of the performance of latent heat storage unit integrated with solar air heater