R134a与R502用于冷藏车的比较研究

Investigation of Cold Storage Truck With R134a and R502

本文通过对Ｒ１３４ａ和Ｒ５０２理论循环性能对比，表明除Ｒ１３４ａ单位容积制冷量和单位容积压缩功小于Ｒ５０２外，二者ＣＯＰ和排气温度相差不大。从目前压缩机实际使用Ｒ１３４ａ的工作范围看，可以达到Ｒ５０２的工作温度范围，为冷藏车中采用Ｒ１３４ａ替代Ｒ５０２进行有益探索。

In this paper,by contrast ideal cycle-performance of R134a with ideal cycle-performance of R502,it is indicated that values of per volume refrigerating capacity and per volume compressing work of R134a are far lower than it of R502,and values of cop and discharge temperature of R134a is close to it of R502. From using Compressor,working range of compressor with R134a can reach working range of compressor with R502.It is shown that R134a can replace R502 in refrigerating truck.