中国电机工程学报2025，Vol.45Issue(12)：4791-4799,中插22,10.DOI:10.13334/j.0258-8013.pcsee.232650
液化天然气冷能利用及固体氧化物燃料电池余热回收系统模拟与优化
Simulation and Optimization of Liquefied Natural Gas Cold Energy Utilization and Solid Oxide Fuel Cell Waste Heat Recovery System
摘要
Abstract
A combined cooling,heating and power system that can capture CO2 from combination of CO2 power cycle and organic Rankine cycle is proposed for the utilization of liquefied natural gas cold energy and solid oxide fuel cell waste heat recovery with natural gas as the fuel.Aspen HYSYS software is used to simulate the system.The effects of shunt ratio x,heat source outlet temperature T32 and compressor outlet pressure P36 on net output,thermal efficiency,exergy efficiency and average unit cost of the system are analyzed.The energy utilization of the system is clarified by combining with equipment analysis,and multi-objective optimization is carried out with 3 parameters as the decision variables.The results show that reducing x and P36 is conducive to improving net output,thermal efficiency and exergy efficiency and reducing average unit cost;lowering T32 is conducive to increasing net output and exergy efficiency,and decreasing thermal efficiency and average unit cost;the energy used in the system is mainly distributed in the heat exchange equipment,and reducing the inlet temperature difference between the cold source and the heat source is beneficial to reducing the exergy losses;thermal efficiency,exergy efficiency and average unit cost cannot reach the ideal optimal solution at the same time,the thermal efficiency,exergy efficiency and average unit cost of the actual optimal solution are 61.03%,54.08%and 34.50 $/GJ,respectively,and the annual net present value and depreciation recovery period are 6.68×106 $ and 2.84 years,respectively.The research can recover cold and heat energy to generate power,which is conducive to resource conservation and environmental protection.关键词
液化天然气/冷热电联供/二氧化碳/朗肯循环/㶲效率/多目标优化Key words
liquefied natural gas/combined cooling,heating and power/carbon dioxide/Rankine cycle/exergy efficiency/multi-objective optimization分类
能源科技引用本文复制引用
乔焱,姜文全,杨帆,李洋,赵泽铭,陈红伟..液化天然气冷能利用及固体氧化物燃料电池余热回收系统模拟与优化[J].中国电机工程学报,2025,45(12):4791-4799,中插22,10.基金项目
国家自然科学基金项目(52006094) （52006094）
辽宁省教育厅基本科研项目(LJKMZ20220725) （LJKMZ20220725）
辽宁省教育厅科学研究经费项目(JYTMS20231452). Project Supported by National Natural Science Foundation of China(52006094) （JYTMS20231452）
Basic Research Project of Liaoning Provincial Department of Education(LJKMZ20220725) （LJKMZ20220725）
Scientific Research Funding Project of Liaoning Provincial Department of Education(JYTMS20231452). （JYTMS20231452）
