摘要
分析了R290替代R22存在的优势,采用某企业生产的R22家用空调外机与套管换热器作为原型机,分别灌注R22和R290,灌注R290的同时更换大排量压缩机,调整节流装置最佳,优化灌注量,试验参照GB/T 18430.2—2008名义工况进行。结果表明:R290系统灌注量仅为R22的44.7%,制冷及制热名义工况下R290能力及能效比均不低于R22,但R290系统排气温度及压缩比明显低于R22。R290可以替代R22用于风冷冷热水机组,相应的压缩机排量应增加19%左右。
The advantages of R290 as a substitute to R22 were analyzed,and the experimental prototype , which assembled with an outdoor unit of a household air conditioner produced by a company using R 22 refrigerant and a coaxial heat exchanger , was charged with R22 and R290 refrigerant at the same time increasing compressor displacement respectively .By optimizing the throt-tling device and refrigerant charge , the experiments were carried out under nominal working conditions in the national standard GB/T 18430.2-2008.The results showed a decrease by 55.3%in charge of R290, and that the capacity and EER of R290 were no less than R22 under both cooling and heating nominal working conditions , while the discharge temperature and compression ra-tio were less than R22 dramatically.R290 could be used to replace R22 in air-to-water heat pump and the compressor displace-ment should be increased about 19%synchronously .
出处
《流体机械》
CSCD
北大核心
2014年第1期54-56,53,共4页
Fluid Machinery
