摘要
空气源热泵热水器系统所用制冷剂主要包括R410A,R407C,R134a,它们的GWP值较高,会对大气环境造成不利影响。将R1234ze/R152a,R290/R1234ze,R152a/R134a分别按一定比例组成混合制冷剂,通过理论分析混合制冷剂的环境影响指数、热力学性能、安全性以及经济性能等因素,并与R410A,R407C,R134a进行对比。分析结果表明,对于配比为3∶7的R290/R1234ze混合制冷剂,其对环境影响较小,饱和压力线与R22相接近,饱和液体密度为R22的1/2,饱和气体比热容大于R22,COP为R22的90%、压力比比R22低5.2%,排气温度比R22和R410A分别低18,20℃。综上可知,混合制冷剂R290/R1234ze是一种性能良好的近共沸混合制冷剂,可替代R22。
The refrigerants used in the air source heat pump water heater system mainly include R410 A,R407 C,and R134 a,which have high GWP values and will have an adverse effect on the atmospheric environment.R1234 ze/R152 a,R290/R1234 ze,R152 a/R134 a are respectively composed of mixed refrigerants in a certain proportion,and the environmental impact index,thermodynamic performance,safety and economic factors are analyzed theoretically,and compared with R410 A,R407 C,and R134 a.The analysis results show that the 3∶7 mixed refrigerant of R290/R1234 ze has very little impact on the environment,the saturation pressure line is close to R22,the density of saturated liquid is half of R22,and the specific heat capacity of saturated gas is greater than R22.The COP value of the mixed refrigerant R290/R1234 ze is 90%of R22,the pressure ratio is 5.2%lower than that of R22,and the discharge temperature is 18℃and 20℃lower than that of R22 and R410 A respectively.It is an excellent near-azeotropic mixed refrigerant,a feasible alternative of R22.
作者
彭斌
王永强
Peng Bin;Wang Yongqiang(School of Mechanical and Electrical Engineering,Lanzhou University of Technology,Lanzhou 730050,China)
出处
《可再生能源》
CAS
CSCD
北大核心
2021年第7期916-921,共6页
Renewable Energy Resources
基金
国家自然科学基金资助项目(51275226,51675254)。
关键词
混合制冷剂
空气源热泵热水器
热力学性能
mixed refrigerants
air-energy heat pump water heater
thermodynamic performance
