部分预热超临界二氧化碳/吸收式动力循环联合循环余热发电系统性能评价与比较  

Performance evaluation and comparison of novel combined power cycles consisting of partial pre-heating supercritical carbon dioxide power cycle and different absorption power cycles for waste heat recovery

作　　者：呼浩 郭前鑫 杨利 余小兵[2,3] 薛晨晰 刘永林 薛彦平[4] 杨庆川 顾雨恒 HU Hao;GUO Qianxin;YANG Li;YU Xiaobing;XUE Chenxi;LIU Yonglin;XUE Yanping;YANG Qingchuan;GU Yuheng(ShenhuaShendong Electric Power Co.,Ltd.Technology Research Institute,Xi’an 710076,China;Xi’an Thermal Power Research Institute Co.,Ltd.,Xi’an 710054,China;Xi’an TPRI Energy Conservation Technology Co.,Ltd.,Xi’an 710054,China;Dianta Power Plant of Shenhua Shendong Electric Power Co.,Ltd.,Shenmu 719316,China)

机构地区：[1]神华神东电力有限责任公司技术研究院,陕西西安710076 [2]西安热工研究院有限公司,陕西西安710054 [3]西安西热节能技术有限公司,陕西西安710054 [4]神华神东电力有限责任公司店塔电厂,陕西榆林719316

出　　处：《热力发电》2024年第7期101-111,共11页Thermal Power Generation

基　　金：国家能源集团国神公司科技项目(GSKJ-23-44)。

摘　　要：部分预热超临界二氧化碳(S-CO_(2))动力循环系统被广泛认为是一种很有前途的余热回收方案。提出了以LiBr-H_(2)O和NH_(3)-H_(2)O为工质对的2种部分预热S-CO_(2)循环系统和吸收式动力循环的联合循环发电系统(部分预热S-CO_(2)/APC系统)。建立并验证了所提出的部分预热-CO_(2)/APC系统的热力学模型。基于单目标和多目标优化结果,从热力学和经济学角度比较了所提出的S-CO_(2)/APC系统与单一S-CO_(2)系统的性能。单目标优化结果表明,与单一S-CO_(2)系统相比,S-CO_(2)/LiBr-H_(2)O系统和S-CO_(2)/NH_(3)-H_(2)O系统的净输出功和净效率分别提高了7.40%和4.30%。多目标优化结果表明,S-CO_(2)/LiBr-H_(2)O系统和S-CO_(2)/NH_(3)-H_(2)O系统的净效率分别提高了7.94%和5.13%,单位投资成本分别提高了12.35%和9.02%,表明S-CO_(2)/LiBr-H_(2)O系统具有较大的发展潜力。[火用]损分析结果表明,[火用]损主要存在于冷却器和加热器中,所提出的S-CO_(2)/APC系统可以显著降低单一S-CO_(2)系统冷却器约45%的[火用]损。Partial heating supercritical carbon dioxide(S-CO_(2))power cycle system is proven to be one promising option for waste heat recovery.By using LiBr-H_(2)O and NH_(3)-H_(2)O as working fluids,two types of novel combined power systems consisting of a parting pre-heating S-CO_(2)cycle and different absorption power cycle(APC)systems are proposed.The detailed mathematical models of the proposed parting heating S-CO_(2)/APC systems are built and verified.Based on the results of single-and multi-objective optimization,the performances of the proposed S-CO_(2)/APC system and the standalone S-CO_(2)system are compared from the perspective of thermodynamics and economics.The single-objective optimization study reveals that the net power output and net efficiency of the S-CO_(2)/LiBr-H_(2)O system and the S-CO_(2)/NH_(3)-H_(2)O system increases by 7.40%and 4.30%,respectively,compared with the standalone S-CO_(2)system.The multi-objective optimization results show that,the S-CO_(2)/LiBr-H_(2)O system and S-CO_(2)/NH_(3)-H_(2)O system can obtain improvements of 7.94%and 5.13%in net efficiency as well as promotion of 12.35%and 9.02%in the specific investment cost respectively,indicating that the S-CO_(2)/LiBr-H_(2)O system has a greater potential.Exergy loss analysis reveals that the main exergy loss exists in the coolers and the heaters,and the proposed S-CO_(2)/APC systems can significantly reduce the exergy loss in the S-CO_(2)cooler by about 45%.

关 键 词：部分预热超临界二氧化碳动力循环 吸收式动力循环 余热回收 经济分析 多目标优化 

分 类 号：TM61[电气工程—电力系统及自动化]