非共沸工质R600/R245fa有机闪蒸循环的分析  

Exergy analysis of organic flash cycle using R600/R245fa mixtures

作　　者：黄桂冬 张凇源 葛众 解志勇 鄢银连 相华江 袁志鹏 HUANG Gui-dong;ZHANG Song-yuan;GE Zhong;XIE Zhi-yong;YAN Yin-lian;XIANG Hua-jiang;YUAN Zhi-peng(School of Architecture and Urban Planning,Yunnan University,Kunming 650500,Yunnan,China;School of Metallurgy and Mining,Kunming Metallurgy College,Kunming 650033,Yunnan Province,China)

机构地区：[1]云南大学建筑与规划学院,云南昆明650500 [2]昆明冶金高等专科学校冶金与矿业学院,云南昆明650033

出　　处：《化学工程》2020年第12期37-41,共5页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(51736005);云南省教育厅科学研究基金项目(2019J0025);云南大学“东陆中青年骨干教师”培养计划(C176220200);云南省教育厅科学研究基金项目(2018JS551);昆明冶金高等专科学校引进人才科研项目(Xxrcxm201802)。

摘　　要：有机闪蒸循环是一种新型动力循环,且非共沸工质可有效改善循环与冷源的温度匹配,因此本研究将有机闪蒸循环与非共沸工质相结合。研究混合工质组分变化对有机闪蒸循环系统[火用]效率、内部[火用]效率和外部[火用]效率的影响,并揭示系统各部件的[火用]损占比。研究结果表明,混合工质系统的[火用]效率和外部[火用]效率均大于纯工质R245fa和R600系统,但循环内部[火用]效率并不一定大于纯工质R245fa系统。混合工质R600/R245fa(0.5/0.5)系统加热器、高压节流阀和低压节流阀的[火用]损占比均小于纯工质R245fa和R600系统,而冷凝器和透平[火用]损占比大于纯工质R245fa和R600系统,因此减小冷凝器和透平[火用]损可进一步提高系统性能。Organic flash cycle is a novel power cycle,and the zeotropic mixtures can effectively improve the temperature match between the cycle and the cold source.Thus,the organic flash cycle were combined with the zeotropic mixtures.The effects of the mole fraction of the zeotropic mixtures on the system exergy efficiency,internal exergy efficiency and external exergy efficiency were studied.Characteristics of the exergy loss ratio in the system were revealed.Results show that the exergy efficiency and external exergy efficiency in the zeotropic mixtures system are higher than those of R245fa and R600 systems.But the internal exergy efficiency is not necessarily greater than that of R245fa system.The exergy loss ratios of heater,high-pressure throttle valve and low-pressure throttle valve in R600/R245fa(0.5/0.5)system are less than those of R245fa and R600 systems,while the exergy loss ratios of condenser and turbine are greater than those of R245fa and R600 systems.Thus,reducing the exergy loss of condenser and turbine can further improve the system performance.

关 键 词：有机闪蒸循环 非共沸工质 [火用]分析 优化 

分 类 号：TK123[动力工程及工程热物理—工程热物理]