摘要
本文对两种烯烃类工质HFO-1336mzz(Z)和HCFO-1224yd(Z)的热物性进行分析,将在高温热泵系统中替代HFC-245fa作为目标,根据混合工质HCFO-1224yd(Z)/HFO-1336mzz(Z)在高温热泵循环中主要热物性特点建立混合工质高温热泵理论循环模型,对比不同工况下混合工质在高温热泵系统中的循环性能,发现混合工质中HFO-1336mzz(Z)可以降低压缩机排气温度以及提高热泵性能系数(COP),HCFO-1224yd(Z)可以改善高温热泵系统吸气比容过大问题。结果表明,当冷凝温度为150℃,循环温升变化区间为50~70℃时,HCFO-1224yd(Z)/HFO-1336mzz(Z)的质量百分比为0.6/0.4的混合工质的循环性能最优;当循环温升为70℃,冷凝温度变化区间为110~150℃时,HCFO-1224yd(Z)/HFO-1336mzz(Z)的组分比为0.2/0.8的混合工质的COP最大达到3.11。
In this paper,the thermosphysical properties of HFO-1336mzz(Z)and HCFO-1224yd(Z)are analyzed.In order to replace HFC-245fa in high-temperature heat pump system,the theoretical cycle model of high-temperature heat pump with mixed refrigerant HCFO-1224yd(Z)/HFO-1336mzz(Z)is established according to the main thermal physical properties of HCFO-1224yd(Z)/HFO-1336mzz(Z).By comparing the cycle performance of the refrigerant mixture in the high temperature heat pump system under different working conditions,it is found that HFO-1336mzz(Z)could reduce the exhaust temperature of compressor and increase the heat pump coefficient of performance(COP),and HCFO-1224yd(Z)could improve the problem of excessive suction specific volume in high temperature heat pump systems.The result shows that the refrigerant mixture with 0.6/0.4 HCFO-1224yd(Z)/HFO-1336mzz(Z)has the best cycle performance when the condensing temperature is 150℃and the cycle temperature rise varies from 50-70℃;the value of COP of the refrigerant mixture with the composition ratio of HCFO-1224yd(Z)/HFO-1336mzz(Z)of 0.2/0.8 reaches the maximum of 3.11 when the cycle temperature rise is 70℃and the condensation temperature change range is 110-150℃.
作者
黄洁
张华
杨梦
HUANG Jie;ZHANG Hua;YANG Meng(Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《制冷技术》
2022年第5期1-6,共6页
Chinese Journal of Refrigeration Technology
基金
国家自然科学基金(No.51606126)
上海市自然科学基金(No.20ZR1438600)。
作者简介
张华(1966-),男,教授,博士。研究方向:制冷低温技术、环保制冷剂和太阳能利用。联系地址:上海市杨浦区军工路516号上海理工大学,邮编200093。联系电话:021-55275542。E-mail:zhanghua3000@163.com。
