| Title |
Investigation of Vapor-Liquid Equilibrium and Miscibility for R-410A/POE Oil Mixtures |
| Authors |
김창년 ; 송준석 ; 이은호 ; 박영무 ; 유재석 ; 김기현 |
| Keywords |
Concentration ; 농도 ; Miscibility ; 상용성 ; Polyolester ; 폴리올에스테르 ; R-410A, Solubility ; 용해도 ; Vapor-liquid equilibrium ; 기-액상평형 |
| Abstract |
The vapor-liquid equilibrium and miscibility measurement apparatus was developed and used to obtain data for refrigerant/oil mixture. The vapor-liquid equilibrium and miscibility data for R-410A/POE32 and R-410A/POE46 oil mixtures are obtained over the temperature range from -20 to 60℃ with 10℃ intervals and the oil concentration range from 0 to 90 wt%. Using the experimental data, an empirical model is developed to predict the temperature-pressure-concentration relations for R-410A/POE oil mixtures at equilibrium. In the R-410A/POE32 oil mixture, the average root-mean-square deviation between measured data and calculated results from the empirical model is 2.00% and in the R-410A/POE46 oil mixture, that is 3.69%. Flory-Huggins theory is also used to predict refrigerant/oil mixture behavior. Miscibility for R-410A/POE32 oil mixture was observed all over the experimental conditions. Immiscibility for R-410A/POE46 oil mixture was observed at the low oil concentrations(10∼30 wt%). |