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设置富氨蒸气回热器的固体氧化物燃料电池/燃气轮机/卡琳娜联合循环系统的热力性能分析

DOI: 10.13334/j.0258-8013.pcsee.2014.26.006, PP. 4483-4492

Keywords: 固体氧化物燃料电池/燃气轮机(SOFC/GT),Kalina循环,EES程序,热力性能,联合循环

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Abstract:

提出了一种新的SOFC/GT/KCS联合循环发电系统,建立了该系统热力性能的数学模型,根据热力学第一定律和第二定律,利用EES软件仿真模拟对系统进行了能量分析、火用分析,并研究了空气流率、燃料利用率、燃料流率、压气机压比、水蒸气碳比的变化对联合循环热力性能的影响。研究结果表明,在设定工况下,SOFC的发电效率为49.2%,系统总发电效率为67.6%,系统总火用效率为68.16%;系统的各部件中,火用损失较大的部件依次为SOFC、后燃烧室、燃气轮机、预热器3和余热锅炉;当燃料利用率为0.85时联合循环系统的性能最佳;在一定范围内,随着空气流率、燃料流率或水蒸汽碳比的增加,联合循环系统的能量利用效率均降低。

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