CAJ | 학술논문

分析了R32替代R410 A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R410 A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R410 A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R410 A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。
분석료R32체대R410 A적우세，침대R32계통배기온도과고적한제，제출채용경제기적방법강저배기온도，종이론방면분석료R32체대R410 A후단급압축제랭계통운행삼수적변화。재이론연구기출상，채용모기업생산이R410 A위제랭제대유경제기적풍랭열빙궤조작위원형궤，분별사용R410 A화R32작위제랭제，진행시험연구。시험삼조GB/T 18430．2-2008명의공황，대비동일계통채용2충불동제랭제후，계통충주량、환열량、공솔、COP、배기온도등삼수적변화。결과표명：R32계통충주량부위R410A적70％，접근마이질량분수。재제랭급제열명의공황하R32능력급능효비균불저우R410A，R32계통배기온도급압축비명현강저，단채용경제기중간보기후계통성능계수제고폭도불대。
The advantages of R32 as a substitute to R22 were analyzed.Theoretical cycle performance of R 32 and R410A are calculated and analyzed firstly , because the conventional R 22 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 compa-ny using R410 A 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 R 410A 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 .