为提高固体氧化物燃料电池 (solid oxide fuel cell，SOFC) 的系统效率、降低碳捕集能耗，提出了一种基于SOFC、有机朗肯循环和功冷联供循环的系统，并利用制冷量液化回收CO₂。通过Aspen Plus 软件搭建联供系统模型，并在设计工况下，探究了SOFC 运行压力、电流密度、燃料利用率、汽碳比对系统热力性能影响。结果显示，SOFC 发电效率为46.19%、系统总发电效率为72.47%、功冷联供效率为85.48%，与使用三级压缩液化CO₂ 相比，总效率提升1.74%。当SOFC 运行压力为0.7 MPa，系统总发电效率最高，为72.48%；当电流密度增至极限电流密度6000 A/m²，电压极化损失增幅变大，对电池产生负面影响；燃料利用率为0.85 时，SOFC 发电效率达到最佳值46.19%；汽碳比对整个系统影响较小，但存在最佳汽碳比值3，使系统效率及功冷联供效率最大，分别为72.49% 和85.70%。

For enhancing the system efficiency of solid oxide fuel cell and decrease the energy consumption of CO₂ capture, a system based on SOFC, organic Rankine cycle and power-cooling cycle is advanced which utilizes refrigeration capacity to liquefy and recover CO₂. The model of cogeneration system is built by Aspen Plus software. And the effects of SOFC operating pressure, current density, fuel utilization rate and steam-carbon ratio on the thermal performance of the system are explored under the design conditions. The results show that the efficiencies of SOFC power generation, total power generation, and the combined power-cooling reach about 46.19%, 72.47%, 85.48%, respectively. Compared with the cogeneration system using three-stage compressed liquefied CO₂, the total efficiency is improved by 1.74%. When SOFC operating pressure is close to 0.7 MPa, the total power generation efficiency of the system is the highest, reaching 72.48%; When the current density increases to the ultimate current density of 6000 A·m⁻², the increase of voltage polarization loss becomes larger, which is bad for the battery; When the fuel utilization rate is 0.85, the SOFC power generation efficiency is the most efficient which is 46.19%; Steam-carbon ratio doesn’t have a big effect on all parameters of the whole system, but there is also the best steam-carbon ratio. When the team-carbon ratio is 3, the system efficiency and power-cooling efficiency are 72.49% and 85.70%, respectively.