基于S-CO_(2)循环的并联与混联新型冷电联产系统热力学和经济性分析  

Thermodynamic and Economic Analysis of Novel Parallel and Hybrid Cold Electricity Cogeneration Systems Based on S-CO_(2) Cycle

作　　者：周云龙[1] 程秋洁 杨美[1] ZHOU Yunlong;CHENG Qiujie;YANG Mei(School of Energy and Power Engineering,Northeast Electric Power University,Jilin 132012,Jilin Province,China)

机构地区：[1]东北电力大学能源与动力工程学院,吉林省吉林市132012

出　　处：《中国电机工程学报》2023年第S1期198-207,共10页PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING

摘　　要：为提高能量利用效率同时实现制冷量的调节,提出新型超临界二氧化碳(supercritical carbon dioxide,S-CO_(2))循环的冷电联产混合动力系统。集成制冷与发电的热力循环,设计并联和混联两种联合循环系统布局方式。基于质量、能量和成本平衡方程,建立热力学和经济模型;从能量和经济的角度对比分析两个联合循环系统的性能。结果表明,并联和混联系统的热效率分别为47.65%和49.12%;单位成本分别为157.85元/GJ和149.49元/GJ;混联系统的(火用)效率比并联系统高2.27%。通过对并联和混联系统顶循环参数进一步分析,得出混联系统具有更好的热经济性能。结果可为基于SCO_(2)系统的冷电联合循环的理论分析提供一些参考。In order to improve the efficiency of energy utilization and realize flexible regulation and control of cooling capacity,a new type of supercritical carbon dioxide(S-CO_(2))cycle combined cooling and power generation hybrid power system is proposed.The absorption refrigeration cycle and the organic rankine cycle are used as the bottom cycle of the hybrid power cycle.Two combined cycle system layouts,parallel and hybrid,are designed.Based on the mass,energy and cost balance equations,thermodynamic and economic models are established.The performance of the two combined cycle systems is compared and analyzed from the perspective of energy and economy.The results show that the thermal efficiency of the parallel and hybrid systems is 47.65%and 49.12%respectively;The unit cost is 157.85 yuan/GJ and 149.49 yuan/GJ respectively;The exergy efficiency of the hybrid system is 2.27%higher than that of the parallel system.Through further analysis of the top cycle parameters of the parallel and hybrid systems,it is concluded that the hybrid system has better thermal economic performance,and the results can provide some reference for the theoretical analysis of the combined cycle of cold and electricity based on the SCO_(2) system.

关 键 词：超临界二氧化碳(supercritical carbon dioxide S-CO_(2))循环 吸收式制冷循环(absorption refrigeration cycle ARC)系统 有机朗肯循环(organic rankine cycle ORC)系统 循环效率 单位成本 

分 类 号：TM73[电气工程—电力系统及自动化]