摘要
在热泵热水器名义工况下,通过建立热泵系统循环热力学模型,利用EES程序,对HFO1234ze/HFCs混合工质热泵系统循环的热力学特性进行了分析计算。发现R1234ze/R32在(20%/80%)和R1234ze/R125在(70%/30%)存在最优配比,对应的系统COP值分别为8.36和7.41。以此为基础,从冷凝压力、排气温度、压比、单位质量制热量和单位质量功耗5个方面和R32、R1234ze、R125、R134a纯工质系统进行了对比分析。结果表明,R1234ze/R32(20%/80%)系统COP分别比R32、R1234ze、R125、R134a和R1234ze/R125(70%/30%)系统COP增加了4.53%,25.32%,41.41%,17.88%和12.81%,其冷凝压力为2.295 MPa,排气温度为80℃,压比为3.016,有望作为新型替代工质。
Under the nominal working condition of heat pump water heater,by establishing the thermodynamic model of the heat pump system and utilizing the EES program,the performance of heat pump systems using HFO1234 ze/HFCs refrigerant blends were analyzed and calculated. It was found that the optimum ratios of R1234 ze/R32（ 20%/80%）and R1234 ze/R125（ 70%/30%） exist. The corresponding system COP values are 8. 36 and 7. 41,respectively. Then,the behavior of heat pump systems with those blends were studied form condensing pressure,exhaust temperature,pressure ratio,heating capacity and power consumption,and compared with that of R32,R1234 ze,R125 and R134 a pure refrigerant systems. The results show that the COP of R1234 ze/R32（ 20%/80%） system increases by 4. 53%,25. 32%,41. 41%,17. 88%,and 12. 81% over than that of R32,R1234 ze,R125,R134 a,and R1234 ze/R125（ 70%/30%） systems,respectively. Its condensing pressure is 2. 295 MPa,exhaust temperature is 80 ℃,and the pressure ratio is 3. 016. It is a promising new alternative refrigerant.
作者
王方
朱飞宇
杨理想
袁秋艳
王帅琪
WANG Fang;ZHU Feiyu;YANG Lixiang;YUAN Qiuyan;WANG Shuaiqi(School of Energy and Environment, Zhongyuan University of Technology, Zhengzhou 450007,Chin)
出处
《实验室研究与探索》
CAS
北大核心
2018年第5期10-13,37,共5页
Research and Exploration In Laboratory
基金
国家自然科学基金项目(U1504501)
国家外专局高端外国专家项目(GDW20164100039)
河南省青年骨干教师项目(2014GGJS-089)
河南省供热空调重点学科开放实验室项目(2016HAC201)
关键词
热泵系统
制冷剂
最优配比
热力学特性
heat pump system
refrigerant
optimal ratio
thermodynamic characteristic
