| Title |
Vapor Pressure and Miscibility for R404A/POE Oil Mixtures |
| Keywords |
Concentration ; 농도 ; Vapor pressure ; 증기압 ; Miscibility ; 혼화성 ; POE ; 폴리올에스테르 ; R-404A, Refrigerant oil ; 냉동기유 |
| Abstract |
The vapor pressure and miscibility measurement apparatus was developed and used to obtain data for refrigerant/oil mixture. The vapor pressure and miscibility data for R-404A/32 ISO VG polyol ester (POE) oil mixture and R-404A/46 ISO VG polyol ester oil mixture are obtained over the temperature range from －20 to 60℃ with at 10℃ intervals and the oil concentration range from 0 to 70 wt%. Using the experimental data, an empirical model was developed to predict the temperature vapor pressure-concentration relations for R-404A/ 46 ISO VG polyol ester oil mixtures at equilibrium. In the R-404A/32 ISO VG polyol ester oil mixture, the average root-mean-square deviation between measured data and calculated results from the empirical model is 1.24% and in the R-404A/46 ISO VG polyol ester oil mixture, that is 1.37%. Miscibility for R-404A/32 ISO VG polyol ester oil mixture was observed all over the experimental conditions. Immiscibility for R-404A/Solest 46 oil mixture was observed at the low oil concentrations (20∼30 wt%) over the high experimental temperature range (50∼60℃). |