耦合氨水吸收式制冷液化回收CO_(2)的SOFC/GT/ST/ORC系统研究  

Study on SOFC/GT/ST/ORC System for Liquefaction and Recovery of CO_(2)by Coupling Ammonia Absorption Refrigeration

作　　者：田松峰[1] 刘诗尧 刘亚轩 包忠祥 张倩[1] 李正宽 张都 TIAN Songfeng;LIU Shiyao;LIU YaXuan;BAO Zhongxiang;ZHANG Qian;LI Zhengkuan;ZHANG Du(Hebei Key Laboratory of Low Carbon and High Efficiency Power Generation Technology,North China Electric Power University,Baoding 071003,Hebei Province,China)

机构地区：[1]华北电力大学河北省低碳高效发电技术重点实验室,河北保定071003

出　　处：《动力工程学报》2023年第6期724-734,共11页Journal of Chinese Society of Power Engineering

摘　　要：为提高固体氧化物燃料电池(SOFC)的联供系统效率、降低碳捕集能耗,提出了一种基于SOFC/透平(GT)/蒸汽轮机(ST)、有机朗肯循环(ORC)和氨水吸收式制冷循环液化回收CO_(2)的联供系统。利用Aspen Plus软件搭建了SOFC本体模型,并对其进行验证。通过输入设计工况下的热力学参数,探究了电流密度、燃料利用率、汽碳比对SOFC本体及联供系统性能的影响。结果表明:在设计工况下,SOFC发电效率为55.5%、联供系统发电效率为76.5%、功冷联供效率为92.6%,与现有系统相比,各效率均有提升;当电流密度增加至极限电流密度时,浓差极化损失迅速增大,对系统性能产生负面影响;随着燃料利用率的提高,功冷比不断下降,各效率呈先增后减的趋势;当汽碳比为2时,联供系统的发电效率及功冷联供效率最大,分别为78.04%和93.2%。In order to improve the efficiency of solid oxide fuel cell(SOFC)combined system and reduce carbon capture energy consumption,a combined system based on SOFC,gas turbine(GT),steam turbine(ST),organic rankine cycle(ORC)and ammonia absorption refrigeration cycle was proposed to liquefy and recover CO_(2).A SOFC ontology model was built and verified by Aspen Plus software.By inputting thermodynamic parameters under design condition,the effects of current density,fuel utilization rate and steam-carbon ratio on the performance of the SOFC and the combined system were studied.Results show that under design conditions,the electrical efficiency of the SOFC,the combined system and the power-cooling supply efficiency are 55.5%,76.5%and 92.6%,respectively.Compared with the existing systems,each efficiency of the proposed system has been improved.When current density increases to the limit current density,the concentration polarization loss increases rapidly,which has a negative impact on system performance.With the improvement of fuel utilization rate,work-cooling ratio decreases,while each efficiency shows a trend of first increasing and then decreasing.When the steam-carbon ratio is 2,the electrical efficiency of the combined system and the power-cooling supply efficiency reach the highest,which are 78.04%and 93.2%respectively.

关 键 词：固体氧化物燃料电池 有机朗肯循环 氨水吸收式制冷循环 联供系统 

分 类 号：TM911.4[电气工程—电力电子与电力传动]