基于分液冷凝采用R600a/R601a混合物有机闪蒸循环性能分析  

Performance Analysis of Organic Flash Cycle Using R600a/R601a Mixtures With Liquid-separation Condensation

作　　者：庞小兵 葛众 解志勇 徐坚 谢建斌 王亚琦 汤翀 赵伟 王柯兰 PANG Xiaobing;GE Zhong;XIE Zhiyong;XU Jian;XIE Jianbin;WANG Yaqi;TANG Chong;ZHAO Wei;WANG Kelan(School of Architecture and Urban Planning,Yunnan University,Kunming 650500,Yunnan Province,China)

机构地区：[1]云南大学建筑与规划学院,云南省昆明市650500

出　　处：《中国电机工程学报》2022年第7期2615-2622,共8页Proceedings of the CSEE

基　　金：云南省应用基础研究计划青年项目(202001BB050070);国家自然科学基金项目(51878591,11862024);云南省教育厅科学研究基金项目(2019J0025)。

摘　　要：建立分液冷凝有机闪蒸循环(liquid-separation condensation organic flash cycle,LSOFC)的热力学模型,采用R600a/R601a为循环工质。研究热源温度为100~150℃时,摩尔组分对LSOFC系统不分液情况下净输出功率以及单位输出功率所需总的换热面积(A_(per))的影响。同时在系统净输出功率最大的情况下,探讨了热源温度150℃时,分液干度以及摩尔组分对LSOFC系统净输出功率以及A_(per)的影响规律。并对LSOFC系统分液与不分液时A_(per)进行比较。结果表明,与R600a和R601a相比,热源温度为100、110~130、140℃和150℃,且R600a/R601a混合物摩尔组分分别为0.2/0.8、0.1/0.9、0.9/0.1及0.7/0.3时,LSOFC系统的净输出功率最大,且一般情况下,采用分液冷凝可有效减少系统的A_(per)。当热源温度为150℃,R601a摩尔组分为0.9时,分液冷凝系统的A_(per)相对于不分液情况最大减少了23.33%,只有当热源温度为100℃,R601a摩尔组分为0.5、0.6及0.7时,采用分液冷凝系统的A_(per)会较不分液有所增加。A thermodynamic model of liquid-separation condensation organic flash cycle(LSOFC)was established,and R600a/R601a was used as the circulating working fluids.The effect of R601a molar composition on the net power output and the ratios of the total heat transfer area to the net power output(A_(per))of the LSOFC system without liquid-separation were studied when the heat source temperature is 100~150℃.Under the condition of the maximum net power output of the system,the effects of liquid-separation dryness and molar composition on the net power output of the LSOFC system and A_(per) were studied at 150℃.The A_(per) of LSOFC system with liquidseparation condensation was compared with that of LSOFC system without liquid-separation.The results show that when the heat source temperature are 100℃、110~130℃、140℃and 150℃,and the molar components of the R600a/R601a mixture are 0.2/0.8,0.1/0.9,0.9/0.1and0.7/0.3,respectively,the net power output of the LSOFC system is the highest compared to that of system used R600a or R601a,and in the most cases,the A_(per) of the system can be effectively reduced by adopting liquid-separation condensation.When the mole fraction of R601a is 0.9 and the heat source temperature is 150℃,the maximum reduction is 23.33%.It’s only when the temperature of heat source is 100℃and the molar fraction of R601a is 0.5,0.6 and 0.7 that the A_(per) of LSOFC system with liquidseparation condensation is increased compared to that of LSOFC system without liquid-separation condensation.

关 键 词：分液冷凝 非共沸工质 有机闪蒸循环 净输出功率 换热面积 

分 类 号：TK123[动力工程及工程热物理—工程热物理]