Performance Optimization of a Phosphoric Acid Fuel Cell/Absorption Refrigerator Hybrid System

摘要

A hybrid system that consists of a phosphoric acid fuel cell (PAFC),an absorption refrigerator and a refrigeration-space is proposed.The four-heat-source absorption refrigerator,which is driven by the waste heat produced from PAFC,provides cooling for a refrigeration-space.A numerical modal is set up to analyze both the steady-state performance and transient performance considering the influences of the electrochemical and thermodynamic irreversibilities.Expressions of the equivalent power output and efficiency of the hybrid system are determined.Moreover,the transient behavior of cold-space temperature is performed and the time to reach a prescribed cold-space temperature is displayed.Thus,the operation regions of the current are optimized at different operating conditions.The results show that in an appropriate current range,the overall power output and efficiencies of the hybrid system are enhanced.