辽宁石油化工大学学报2026，Vol.46Issue(3)：73-81,9.DOI:10.12422/j.issn.1672-6952.2026.03.010
基于LNG冷能的多级循环联产系统热力学分析与优化
Thermodynamic Analysis and Optimization of Multi-Stage Cycle Cogeneration System Based on LNG Cold Energy
摘要
Abstract
To address the challenges in LNG cold energy utilization and waste heat recovery from gas turbine flue gas,and to facilitate the liquefaction of the contained carbon dioxide,a novel combined cooling,heating and power(CCHP)system is proposed.The effects of the split ratio(x),the compressor inlet pressure(p25),and the mass fraction of carbon tetrafluoride in the mixed working fluid(w)were analyzed.A multi-objective optimization was subsequently performed using a genetic algorithm.The results show that decreasing x and increasing w enhances thermal efficiency,exergy efficiency,and net output work,while reducing the average unit cost.The optimal compressor inlet pressure(p25)was found to be in the range of 8.0 MPa to 9.0 MPa.The thermal efficiency,exergy efficiency,the average unit cost and the average unit cost under the optimal working conditions of the system were 67.62%,56.98%and 22.11 $/GJ,respectively.关键词
液化天然气/冷热电联供/㶲效率/经济分析/多目标优化Key words
Liquefied natural gas/Combined cooling,heating and power/Exergy efficiency/Economic analysis/Multi-objective optimization分类
能源科技引用本文复制引用
孙闪闪,杨帆,王长顺,肖可,姜文全..基于LNG冷能的多级循环联产系统热力学分析与优化[J].辽宁石油化工大学学报,2026,46(3):73-81,9.基金项目
辽宁省教育厅基本科研项目(LJKMZ20220725). （LJKMZ20220725）
