摘要
针对高温钙基碳捕集技术回收储存过程中未利用CO_(2)的超临界、流量大等特点的问题,采用半闭式超临界二氧化碳(S-CO_(2))布雷顿循环系统取代传统CO_(2)回收系统,以降低由于碳捕集系统所造成的热量损失。利用Aspen Plus软件搭建耦合钙循环碳捕集的燃气轮机发电模型,在其CO_(2)回收系统中耦合S-CO_(2)布雷顿循环系统和跨临界二氧化碳(T-CO_(2))布雷顿循环系统,使用精准度更高的REFPROR物性方法研究主压缩机出口压力、透平入口温度、透平入口压力及分流系数对循环系统净做功的影响。结果表明:CO_(2)回收系统中耦合S-CO_(2)布雷顿循环系统可以使全厂热效率提升1.7%,全厂[火用]效率为26.98%;采用分流纯净烟气的方法作为S-CO_(2)布雷顿循环系统的热源,可使同一热源的热效率提升6.7%。
Aiming at the problem of unused supercritical and large flow characteristics of CO_(2)in the recovery and storage process of high-temperature calcium-based carbon capture technology,the semi-closed supercritical carbon dioxide(S-CO_(2))Brayton cycle system was proposed to replace the conventional CO_(2)recovery and storage system to reduce the heat loss caused by the carbon capture system.Aspen Plus software was used to build a gas turbine power generation model coupled with calcium-cyclic carbon capture,which couples the S-CO_(2)Brayton cycle system and transcritical carbon dioxide(T-CO_(2))Brayton cycle system in the CO_(2)recovery system.REFPROR physical property method with higher precision was used to study the effects of main compressor outlet pressure,turbine inlet temperature,turbine inlet pressure and shunting coefficient on the net work of the circle system.Results show that through coupling the S-CO_(2)Brayton cycle system in the CO_(2)recovery system,the thermal efficiency of the plant can be increased by 1.7%,and the exergy efficiency is 26.98%.The method of diverting pure flue gas to generate a heat source for the S-CO_(2)Brayton cycle system can improve the thermal efficiency of the same residual heat by 6.7%.
作者
田松峰
刘亚轩
李正宽
刘诗尧
包忠祥
TIAN Songfeng;LIU Yaxuan;LI Zhengkuan;LIU Shiyao;BAO Zhongxiang(Department of Power Engineering,North China Electric Power University,Baoding 071003,Hebei Province,China;Hebei Key Laboratory of Low Carbon and High Efficiency Power Generation Technology,North China Electric Power University,Baoding 071003,Hebei Province,China)
出处
《动力工程学报》
CAS
CSCD
北大核心
2023年第3期349-358,共10页
Journal of Chinese Society of Power Engineering
