一种冷热电联供和CO_(2)捕集的联合动力循环  

A combined power cycle of cold,heat and electricity and CO_(2)capture

作　　者：乔焱 姜文全[2] 杨帆[1] 宿诗雨 石杰峰 赵泽铭 QIAO Yan;JIANG Wen-quan;YANG Fan;SU Shi-yu;SHI Jie-feng;ZHAO Ze-ming(College of Petroleum and Natural Gas Engineering;School of Mechanical Engineering,Liaoning Petrochemical University,Fushun 113001,Liaoning Province,China)

机构地区：[1]辽宁石油化工大学石油天然气工程学院,辽宁抚顺113001 [2]辽宁石油化工大学机械工程学院,辽宁抚顺113001

出　　处：《化学工程》2023年第2期46-50,共5页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(52006094);辽宁省教育厅科学研究经费项目(L2019024)。

摘　　要：针对液化天然气(LNG)的冷能利用、天然气燃烧生成烟气的余热回收和烟气中CO_(2)的捕集问题,提出了一种冷热电联供的CO_(2)回热朗肯循环和三级有机朗肯循环联合动力循环(CO_(2)RRC-TORC)。采用Aspen HYSYS软件对系统进行模拟,分析了CO_(2)回热朗肯循环透平入口压力、三级ORC透平入口温度和压缩机出口压力对热力学性能的影响。结果表明:在CO_(2)质量流量为3.2 kg/s,透平等熵效率为75%时,系统净输出功可达2425.57 kW,热效率为64.76%,冷[火用]回收率为44.78%,[火用]效率为42.57%,年度净资产为3503736.70美元。相较于CO_(2)回热朗肯循环和单级有机朗肯循环联合动力循环(CO_(2)RRC-SORC),CO_(2)RRC-TORC系统在热力学和经济性方面均具有更大优势。For the cold energy utilization of liquefied natural gas(LNG),the waste heat recovery of flue gas generated by natural gas combustion and the capture of CO_(2)in flue gas,a CO_(2)regenerative Rankine cycle and three-stage organic Rankine cycle combined power cycle(CO_(2)RRC-TORC)with cold,heat and electricity supply was proposed.Aspen HYSYS software was used to simulate the system and analyzed the effects of inlet pressure of CO_(2)regenerative Rankine cycle turbine,inlet temperature of three-stage ORC turbine and outlet pressure of compressor on thermodynamic property.The results show that when CO_(2)mass flow is 3.2 kg/s and turbine isentropic efficiency is 75%,the net output power of the system can reach 2425.57 kW with thermal efficiency of 64.76%,cold exergy recovery efficiency of 44.78%,exergy efficiency of 42.57%,and the annual net assets are 3503736.70 dollars.Compared with CO_(2)regenerative Rankine cycle and single-stage organic Rankine cycle combined power cycle(CO_(2)RRC-SORC),CO_(2)RRC-TORC system has greater advantages in thermodynamics and economy.

关 键 词：LNG 冷热电联供 朗肯循环 热力学分析 CO_(2) 

分 类 号：TK123[动力工程及工程热物理—工程热物理]