辽宁石油化工大学学报2025，Vol.45Issue(5)：73-80,8.DOI:10.12422/j.issn.1672-6952.2025.05.009
基于LNG冷能的双闪蒸联合循环系统热经济分析
Thermo-Economic Analysis of Dual-Flash Combined Cycle System Using LNG Cold Energy
摘要
Abstract
A new type of combined cooling,heating and power(CCHP)system is proposed,consisting of a dual recompression Brayton cycle,a CO2 reheat Rankine cycle and a two-stage flash cycle,to achieve synergistic waste heat recovery from a natural gas-fueled solid oxide fuel cell,utilization of liquefied natural gas(LNG)cold energy,and capture of CO2 from flue gas.The cycle system was simulated using thermodynamic simulation software to analyze the effects of the mass fraction of mixed workmass Xe,the inlet pressure p23 of the CO2 reheat Rankine cycle expander,the pump outlet pressure p26 of the flash cycle,and the shunt ratio x on the system's thermal efficiency,saprophytic efficiency,net work output,and cold water recovery rate.The results demonstrate that increasing p23 is favorable to improve the net output work,thermal efficiency and hydronic efficiency of the system;decreasing p26 is favorable to improve the net output work and thermal efficiency of the system,and increasing the Xe mass fraction and shunt ratio can improve the net circulating work,thermal efficiency and hydronic efficiency of the system.When the mass fraction of Xe is 0.3,p23 is 16 MPa and p26 is 13.5 MPa,the thermal efficiency,the net efficiency and the net output work of the system are 67.17％,58.13％and 2 587.96 kW,respectively.关键词
固体氧化物燃料电池/液化天然气/余热回收/㶲分析/混合工质Key words
Solid oxide fuel cell/Liquefied natural gas/Waste heat recovery/Energy analysis/Mixed media分类
能源科技引用本文复制引用
张忠睿,姜媛媛,曹英举,陈旭阳,王长顺,姜文全..基于LNG冷能的双闪蒸联合循环系统热经济分析[J].辽宁石油化工大学学报,2025,45(5):73-80,8.基金项目
辽宁省教育厅基本科研项目(LJKMZ20220725). （LJKMZ20220725）
