Abstract
The liquid ammonia-fueled SOFC-PEMFC (solid oxide fuel cell-proton exchange membrane fuel cell) hybrid system is studied, and the influence of three factors on the energy efficiency of the system is analyzed. The results show that when the SOFC fuel utilization rate gradually increases, the maximum power of the hybrid system is 1277.85 kW, the total electrical efficiency of the system can reach 62.55%, the combined cooling and power (CCP) efficiency is the highest 69.25%, and the thermoelectric efficiency is gradually increased to 93.19%. When the SOFC operating temperature gradually increases, the electrical efficiency of the hybrid system is the highest 62.72%, the CCP efficiency is 69.41%, and the thermoelectric efficiency is basically maintained at about 90%. When the SOFC operating pressure gradually increases, the total power of the system is up to 1352.19 kW, the electrical efficiency and CCP efficiency of the system are about 60%, and the thermoelectric efficiency of the system is basically maintained between 88% and 95%.
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