A combined cold and power system integrated SOFC, sSCO₂ power cycle, and compression–absorption refrigeration (CAR) is designed and optimized to utilize the high-temperature waste heat of solid oxide fuel cell (SOFC). On the premise of retaining the preheating capacity, the waste heat of the gas from after burner is first used to drive the sCO₂ power cycle. The inlet temperature of compressor in sCO₂ power cycle is appropriately raised to avoid the pinch point. The residual heat of sCO₂ is used to drive CAR with [Na(Tx-7)]SCN/NH₃ as working fluid. On the basis of the electrochemical reaction model of SOFC and the first and second laws of thermodynamics, the steady state characteristics are simulated by using the engineering equation solver. The reliability and energy balance of the model is verified. The optimizations, comparison, and exergy analysis are conducted and discussed. The optimal n_CH4, T_FC,in, and γ_SC are determined to be 0.004136 mol/s, 1029.1 K, and 2.5, respectively. The circulation ratio should be controlled within the range of 3.9 to 4.0. Comparison results reveal the exergy efficiency of the proposed system is higher than that of the SOFC/GT-ORC system by at least 0.035. The main reason for exergy destruction is due to the chemical reactions. The exergy destruction of the SOFC subsystem is the largest, which accounts for 73.7% of the total exergy destruction.

设计并优化了集成 SOFC、sSCO ₂动力循环和压缩吸收式制冷 (CAR) 的冷电联合系统，以利用固体氧化物燃料电池 (SOFC) 的高温废热。在保持预热能力的前提下，后燃烧器产生的燃气余热首先用于驱动sCO ₂动力循环。适当提高sCO ₂动力循环压缩机入口温度，避免出现夹点。sCO ₂的余热用于驱动具有[Na(Tx-7)]SCN/NH _{3 的}CAR作为工作流体。基于SOFC的电化学反应模型和热力学第一、第二定律，利用工程方程求解器对稳态特性进行了模拟。验证了模型的可靠性和能量平衡。进行和讨论了优化、比较和火用分析。最佳n _CH4、T _FC,in和 γ _SC分别确定为 0.004136 mol/s、1029.1 K 和 2.5。循环比应控制在3.9～4.0范围内。比较结果表明，所提出系统的火用效率比 SOFC/GT-ORC 系统高至少 0.035。火用破坏的主要原因是化学反应。SOFC子系统的火用破坏最大，占总火用破坏的73.7%。