基于LNG冷能的联合循环系统多目标性能  

Multi-objective performance of combined cycle systems using LNG cold energy

作　　者：郭媛媛 魏鹤鸣 潘振[1] 韦丽娃[3] 商丽艳[4] GUO Yuan-yuan;WEI He-ming;PAN Zhen;WEI Li-wa;SHANG Li-yan(College of Petroleum Engineering,Liaoning Petrochemical University,Fushun 113001,China;Dalian Petrochemical Company,PetroChina Company Limited,Dalian 116000,China;School of Mechanical Engineering,Liaoning Petrochemical University,Fushun 113001,China;School of Environmental&Safety Engineering,Liaoning Petrochemical University,Fushun 113001,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]中国石油天然气股份有限公司大连石化分公司,辽宁大连116000 [3]辽宁石油化工大学机械工程学院,辽宁抚顺113001 [4]辽宁石油化工大学环境与安全工程学院,辽宁抚顺113001

出　　处：《高校化学工程学报》2022年第6期870-878,共9页Journal of Chemical Engineering of Chinese Universities

基　　金：辽宁省博士科研启动基金计划项目(2019-BS-159);辽宁省教育厅科学研究经费项目(L2019024,LJKZ0381);辽宁省教育厅重点科研项目(L2020002)。

摘　　要：为了更有效地利用液化天然气(LNG)接收站的LNG冷能,提出一个由双级有机朗肯循环(DORC)和跨临界有机闪蒸循环(TOFC)组合的新型冷热电联供系统(CCHP)。构建新的数学模型,讨论关键参数对系统热力学性能、经济性能及环境性能3个方面的影响。并与一个单级有机朗肯循环(SORC)和亚临界有机闪蒸循环(BOFC)组合的CCHP系统进行对比。结果表明,前者性能优于后者;对系统进行多目标优化后,在最佳运行工况时,系统㶲效率为47.23%、总单位产品成本率为44.20$·GJ^(-1)、总单位产品环境影响率为40.06 mPts·GJ^(-1)。In order to effectively use LNG cold energy in liquefied natural gas(LNG)receiving stations,a new combined cooling,heating and power system(CCHP)integrating two-stage organic Rankine cycle(DORC)and transcritical flash cycle(TOFC)was proposed,and a new mathematical model was established.The impact of key parameters on thermodynamic,economic and environmental performance of the system were discussed.The performance were compared with a combined CCHP system using single-stage organic Rankine cycle(SORC)and subcritical flash cycle(BOFC).The results show that the studied system has better performance and after multi-objective optimization under the best operating conditions,the system energy efficiency is 47.23%,the total unit product cost rate is 44.20$·GJ^(-1) and the total unit product environment impact rate is 40.06 mPts·GJ^(-1).

关 键 词：液化天然气冷能 㶲经济 㶲环境 优化 

分 类 号：TE09[石油与天然气工程]