원통 - 관형 열교환기를 적용한 스크류 압축식 냉동기의 R407C 적용 성능시험

R407C, a non-azeotropic mixture of R32/R125/R134a, is considered as one major replacements for R22 which is destined to be soon phased out. Non-azeotropic mixtures have characteristics of variable temperature phenomena during phase change and decrease in heat transfer due to mass transfer resistance. In this study, performance test of a screw compressor type chiller using R407C with shell and tube heat exchangers are conducted. Cooling capacity, compressor work, COP are measured and the results are compared with those of R22.