流体机械

2014, v.42;No.505(07) 65-68

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R32在带经济器的风冷冷热水机组的试验研究
Experimental Study of Air-to-water Heat Pump with an Economizer Using R32

于文远;李征涛;陈阿勇;肖庭庭;陈坤;王一恒;
YU Wen-yuan;LI Zheng-tao;CHEN A-yong;XIAO Ting-ting;CHEN Kun;WANG Yi-heng;University of Shanghai for Science and Technology;

摘要(Abstract):

分析了R32替代R410A的优势,针对R32系统排气温度过高的限制,提出采用经济器的方法降低排气温度,从理论方面分析了R32替代R410A后单级压缩制冷系统运行参数的变化。在理论研究基础上,采用某企业生产以R410A为制冷剂带有经济器的风冷热泵机组作为原型机,分别使用R410A和R32作为制冷剂,进行试验研究。试验参照GB/T 18430.2—2008名义工况,对比同一系统采用2种不同制冷剂后,系统充注量、换热量、功率、COP、排气温度等参数的变化。结果表明:R32系统充注量仅为R410A的70%,接近摩尔质量分数。在制冷及制热名义工况下R32能力及能效比均不低于R410A,R32系统排气温度及压缩比明显降低,但采用经济器中间补气后系统性能系数提高幅度不大。
The advantages of R32 as a substitute to R22 were analyzed. Theoretical cycle performance of R32 and R410A are calculated and analyzed firstly,because the conventional R22 system has a higher discharge temperature. Based on the theoretical study,an air-to-water heat pump with an economizer as an experimental prototype is investigated,which are supplied by a company using R410A and R32 refrigerant. The experiments were carried out under nominal working conditions in the national standard GB /T 18430. 2—2008. Some experiments are made to investigate the variation of refrigerant system on charging rate,capacity,COP,discharge temperature after the replacement of R410A with R32. The results showed a decrease by 70% in charge of R410A which is close to the molar mass fraction,and that the capacity and EER of R32 were no less than R410A under both cooling and heating nominal working conditions,while the discharge temperature and compression ratio were decreased obviously.However,the coefficient of system performance increased a little after using economizer.

关键词(KeyWords): R32;R410A;经济器;风冷热泵机组;充注量
R32;R410A;economizer;air-to-water heat pump;charge

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作者(Author): 于文远;李征涛;陈阿勇;肖庭庭;陈坤;王一恒;
YU Wen-yuan;LI Zheng-tao;CHEN A-yong;XIAO Ting-ting;CHEN Kun;WANG Yi-heng;University of Shanghai for Science and Technology;

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