Thermodynamic analysis and performance optimization of solid oxide fuel cell and refrigerator hybrid system based on H2 and CO

A hybrid system consisting of solid oxide fuel cell (SOFC) and absorption refrigerator is established, where hydrogen and carbon monoxide are the reactant in electrochemical reactions of SOFC, and air conditioning is derived for the residence due to the utilization of waste heat from the SOFC. The molar ratio of carbon monoxide to hydrogen consumed in the electrochemical reactions is suggested 0.053 to attain the optimal equivalent energy conversion efficiency of the hybrid system. The maximum equivalent energy conversion efficiency of the SOFC and refrigerator hybrid system will reach 87%. The curves of energy conversion efficiency of the hybrid system ηH and SOFC η varying with current density of the SOFC, respectively.119