摘要
作为环保制冷剂之一的R1234yf,其物性参数方面与R134a表现出相似的特征。R1234yf具有微弱的毒性和可燃性。文中分析了R1234yf冷凝传热、沸腾传热系数、压降与R134a的差异。与R134a相比,R1234yf换热性能相似,压降更小,可以通过回热器、强化补气技术及与R134a组成混合工质等方式增强其换热能力。
As one of the environmentally friendly refrigerants,R1234yf has similar characteristics with R134a in terms of physical parameters.R1234yf has weak toxicity and flammability.The difference between R1234yf's condensation heat transfer,boiling heat transfer coefficient and pressure drop with R134a is analyzed.Compared with R134a,R1234yf has a weaker heat transfer capacity and a smaller pressure drop.Heat transfer capacity can be enhanced with applying internal heat exchanger(IHX),economized vapor injection(EVI)or mixed refrigerant composed of R1234yf and R134a.
作者
宋明浩
张铁臣
汪琳琳
SONG Minghao;ZHANG Tiechen;WANG Linlin(College of Environmental and Energy Engineering,Hebei University of Technology,Tianjin 300401;China Automotive Technology and Research Center Co.,Ltd.,Tianjin 300300)
出处
《汽车实用技术》
2021年第12期178-181,共4页
Automobile Applied Technology
基金
移动源污染排放控制技术国家工程实验室开放基金项目(NELMS2017C06)资助。
关键词
R1234yf
传热系数
物性
汽车空调
R1234yf
Heat transfer coefficient
Physcial property
Vehicle air conditioner
