带经济器补气的R1234yf车用热泵系统性能试验研究  

Experimental research on the performance of R1234yf heat pump system with an economizer for vehicles

作　　者：苏之勇 陈刚 李海军[1] 于义伟 苏梓昭 徐梦琪 唐欣渝 SU Zhiyong;CHEN Gang;LI Haijun;YU Yiwei;SU Zizhao;XU Mengqi;TANG Xinyu(School of Energy&Environment,Zhongyuan University of Technology,Zhengzhou 450003,China)

机构地区：[1]中原工学院能源与环境学院,郑州450003

出　　处：《流体机械》2024年第5期9-15,共7页Fluid Machinery

基　　金：河南省重点产学研项目(162107000061)。

摘　　要：针对普通车用热泵空调无法实现同一压缩机超低温制热、超高温制冷的技术性难题,开发了一种带经济器补气的R1234yf车用热泵系统试验台,试验研究了在不同车外温度下,低压、中压补气模式对系统性能的影响。结果表明:在不同车外温度下,低压补气、中压补气技术均可明显改善系统性能,且中压补气技术提高系统性能较为明显;超低温制热、超高温制冷时,低压、中压补气压缩机排气温度均低于90 ℃;在超高温(50 ℃)工况下,相对于低压补气,中压补气制冷量增加了6.9%,COP增加了3.2%;在超低温(-10,-20 ℃)工况下,相对于低压补气,中压补气制热量增加了11.1%~23.2%,COP增加了3.0%~3.8%;中压补气系统性能均优于低压补气系统。In order to solve the technical problems that common heat pump air conditioner for vehicles can not achieve ultra-low temperature heating and ultra-high temperature refrigeration of the same compressor,a test bench for R1234yf heat pump system for vehicles with an economizer for replenishment was developed.The impacts of low-pressure and medium-pressure gas replenishment modes on system performance were studied at different temperatures outside the car in the experiment.The results show that at different temperatures outside vehicles,the low-pressure gas and medium-pressure gas replenishment technology can significantly improve system performance,and the medium-pressure replenishment technology improves the system performance more obviously;The exhaust temperature of both the low-pressure and medium-pressure replenishing compressor is lower than 90℃during ultralow temperature heating and ultrahigh temperature cooling;in the case of ultra-high temperature(50℃),compared with low-pressure replenishment,the cooling capacity of medium-pressure replenishment technology increases by 6.9%,and COP increases by 3.2%;in the case of ultra-low temperature(-10 and-20℃),compared with low-pressure replenishment,the heating capacity of medium-pressure replenishment technology increases by 11.1%~23.2%,and COP increases by 3.0%~3.8%;The performance of medium-pressure replenishment system is better than that of low-pressure replenishment system.

关 键 词：车用热泵 R1234yf 经济器补气 性能 

分 类 号：TH12[机械工程—机械设计及理论]