基于LNG冷能的多级循环联产系统热力学分析与优化OA
Thermodynamic Analysis and Optimization of Multi-Stage Cycle Cogeneration System Based on LNG Cold Energy
针对液化天然气冷能利用、燃气轮机烟气余热回收问题及烟气中二氧化碳液化的需求,提出了一种新型冷热电联供系统;分析了分流比(x)、压缩机入口压力(p25)以及混合工质中四氟化碳的质量分数(w)对系统的热效率、㶲效率、净输出功及平均单位成本的影响,并基于遗传算法进行了多目标优化.结果表明,减小x、增大w有利于提高系统的热效率、㶲效率、净输出功,降低平均单位成本;最佳p25范围为8.0～9.0 MPa;在最优工况下,系统的热效率、㶲效率、平均单位成本分别为67.62%、56.98%、22.11 $/GJ.
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.
孙闪闪;杨帆;王长顺;肖可;姜文全
辽宁石油化工大学 石油天然气工程学院,辽宁 抚顺 113001辽宁石油化工大学 石油天然气工程学院,辽宁 抚顺 113001辽宁石油化工大学 石油天然气工程学院,辽宁 抚顺 113001辽宁石油化工大学 石油天然气工程学院,辽宁 抚顺 113001辽宁石油化工大学 机械工程学院,辽宁 抚顺 113001
能源科技
液化天然气冷热电联供㶲效率经济分析多目标优化
Liquefied natural gasCombined cooling,heating and powerExergy efficiencyEconomic analysisMulti-objective optimization
《辽宁石油化工大学学报》 2026 (3)
73-81,9
辽宁省教育厅基本科研项目(LJKMZ20220725).
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