Experimental Study on a Hybrid Adsorption Refrigeration System Powered by Low Grade Heat from Fuel Cells
Utilizing 70° C low-grade heat sources discharged by low-temperature proton exchange membrane fuel cells for the efficient supply of cooling capacity is the key to enhance the efficiency of combined cooling and power systems.In this paper,a hybrid adsorption refrigeration system using solid desiccant cooling system is designed and experimentally studied to recover 70° C low grade heat and realize efficient cooling and dehumidification.Results show that the hybrid system can be operated effectively under a heat source temperature of 70℃.Increasing inlet air temperature or relative humidity can facilitate the system performance promotion.The cooling capacity and COP are up to 3.95 kW and 0.539,respectively.Using such hybrid system to exploit 70℃ low-grade heat sources can significantly improve the overall efficacy of proton exchange membrane fuel cells,reaching 67.3％.
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