摘要
在名义工况下建立热泵热水器系统的热力学循环模型,利用EES分别计算三种HCs纯工质及其与HFO1234yf混合工质的热泵性能。结果显示:R1234yf/R600(Z1)和R1234yf/R600a(Z2)均在质量分数(10/90)处出现最大制热COP值,分别为3.413和3.305,R1234yf/R290(Z3)则出现单调递减的趋势。在最优配比(10/90)情况下,混合工质Z1系统排气温度为76.26℃,冷凝压力为0.681 MPa,压比为6.284,制热量为193.6 J/g,■效率为0.212;系统Z2、Z3及纯工质R600、R600a、R290的制热性能系数COP分别较Z1降低3.06%、3.09%、13.94%、5.10%、5.66%。Z1具有较好的热力学性能,有望成为替代工质。
Under the nominal working condition of heat pump water heater,a thermodynamic model of heat pump system circulation was established,EES program was used to compare and calculate the thermodynamic characteristics of the pure working medium and mixture of working medium R1234 yf.The results show that R1234 yf/R600(Z1)and R1234 yf/R600 a(Z2)have the optimal ratio at the mass fraction(10/90),the corresponding maximum COP is 3.413 and 3.305,while R1234 yf/R290(Z3)shows a monotone decreasing trend;In the condition of(10/90)mass fraction,exhaust temperature of running state parameters in Z1 system is 76.26℃,pressure is 0.681 MPa,pressure ratio is 6.284,heat production is 193.6 J/g,exergy efficiency is 0.212,while heating COP of Z2,Z3,R600,R600 a,R290 system is lower of 3.06%,3.09%,13.94%,5.10%,5.66%than Z1.Mixed working medium Z1 shows good performance and is expected to be a substitute working medium.
作者
梁静静
王方
李志强
王鹏超
袁秋艳
王恒
徐强
Liang Jingjing;Wang Fang;Li Zhiqiang;Wang Pengchao;Yuan Qiuyan;Wang Heng;Xu Qiang(School of Energy&Environment,Zhongyuan University of Technology,Zhengzhou 450007,China)
出处
《低温与超导》
CAS
北大核心
2020年第8期56-61,共6页
Cryogenics and Superconductivity
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)
河南省高校科技创新人才支持计划(20HASTIT019)。
