| Title |
Analysis and Experiment on the Performance of an Autocascade Refrigeration System Using Carbon Dioxide As a Refrigerant |
| Keywords |
R744 ; 이산화탄소 ; Mass fraction ; 질량성분비 ; Autocascade refrigeration system ; 오토캐스케이드 냉동시스템 ; Vapor compression system ; 증기압축시스템 |
| Abstract |
The purpose of this study is to investigate the performance of an autocascade refrigeration system by simulation and experiment using refrigerant mixtures of R744/134a and R744/290 as working fluids. Variations of mass flow rate of refrigerant, compressor work, refrigeration capacity and COP with respect to mass fraction of R744/134a and R744/290 mixtures were presented under different operating conditions. Performance test has been executed by ASHRAE standard. Experimental results show as the composition of R744 in the refrigerant mixture increases, heating and cooling capacity are enhanced, but COP tends to decrease. Experimental results are compared with those from the simulation. |