LAUSR

Abstract In this study, the performance of a new configuration of the solar-based desiccant air conditioning system integrated with a humidification-dehumidification desalination unit was assessed thoroughly. The main novelty of the study stemmed from the fact that the regeneration air was preheated by a photovoltaic/thermal solar collector unit before it entered the desiccant wheel and the considered solar system was improved by the phase change material to satisfy the heating demands of air conditioning system at nighttime. The effects of the regeneration air flow rate and temperature on the cooling COP of the air conditioning system, freshwater production, and thermal and electrical efficiencies of the photovoltaic/thermal system were examined for a typical day in August. Results showed that the maximum COP of the air cooling system and the best value of distillate water, for an air mass flow rate of 0.78 kg/s were about 0.411and 4.9 l/h, respectively. The maximum electrical power generation capacity and electrical efficiency of the photovoltaic collector were obtained 0.72 kWh, and 13.7%, respectively, at 13 : 00. The heat capacity and efficiency were approximately 3.39 kWh and 65%, respectively at 12 : 00. Finally, the maximum thermal energy, which was delivered to the air conditioning system by the phase change material was about 0.89 kWh.