地热水驱动的喷射式有机闪蒸循环性能分析  

Performance analysis of organic flash cycle with ejector driven by geothermal water

作　　者：相华江 张凇源 葛众 解志勇 黄桂冬 鄢银连 袁志鹏 XIANG Hua-jiang;ZHANG Song-yuan;GE Zhong;XIE Zhi-yong;HUANG Gui-dong;YAN Yin-lian;YUAN Zhi-peng(School of Architecture and Urban Planning,Yunnan University,Kunming 650504,Yunnan Province,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650504 [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10期11-16,39,共7页Chemical Engineering(China)

基　　金：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：为了探究喷射式有机闪蒸循环(OFC)的中低温性能,构建了100-200℃地热水驱动的喷射式有机闪蒸循环热性能模型,选取R601,R600,R600a,R1234ze和R1234yf作为循环工质,以净输出功率为优化目标,对闪蒸压力进行了优化。在最大净输出功率下,研究了最优闪蒸压力、净输出功率、热效率和[火用]效率随热源温度的变化规律。结果表明:存在一个特征温度,其值为工质吸热压力上限所对应的饱和液态温度和夹点温差之和。当热源温度大于特征温度时,最优闪蒸压力、净输出功率、热效率及[火用]效率随热源温度的变化趋势发生变化。以R601为循环工质时,与传统OFC相比,喷射式OFC系统净输出功率更大,其相对增大率为26.83%-2.13%。In order to explore the medium and low temperature performance of organic flash cycle(OFC)with ejector,a thermal performance model of the OFC with ejector driven by 100-200℃ geothermal water was established.R601,R600,R600a,R1234ze and R1234yf were selected as working fluids.The flash pressure was optimized with net power output as the optimization objective.At the maximum net power output,the variations of the optimal flash pressure,net power output,thermal efficiency and exergy efficiency of the system with heat source temperature was studied.The results show that there is a characteristic temperature whose value is the saturated liquid temperature corresponding to the upper limit of the endothermic pressure plus the pinch point temperature difference.When the heat source temperature is higher than the characteristic temperature,the variation trends of the optimal flash pressure,net power output,thermal efficiency and exergy efficiency change with the change trend of heat source temperature.When R601 is used,the net power output of the OFC with ejector is larger than that of the conventional OFC,and the relative increments is 26.83%-2.13%.

关 键 词：有机闪蒸循环 喷射器 闪蒸压力 热力学 [火用]效率 

分 类 号：TK123[动力工程及工程热物理—工程热物理]