| Title |
Experimental Vapor-Liquid Equilibra for CO₂/Oil Systems inthe Range of Compressor Working Pressure |
| Authors |
이치석(Chi Seok Lee) ; 이경렬(Kyoung Youl Lee) ; 유한연(Han Yeon You) ; 강병하(Byung Ha Kang) ; 박경근(Kyoung Kuhn Park) |
| Keywords |
이산화탄소 ; POE ; PAG ; 기-액 상평형 Carbon dioxide ; POE ; PAG ; Vapor-liquid equilibrium |
| Abstract |
An experimental apparatus was constructed to obtain vapor-liquid equilibrium data for CO₂/oil mixtures using mass analysis method with sample cylinder. Lubricants employed were POE(poly-ol ester) and PAG(poly alkylene glycol). The phase equilibria of CO₂/ oil mixtures prevailed in an equilibrium cell were observed through a couple of sight glasses at the opposite ends. Data were obtained over the temperatures ?10℃, ?5℃, 0℃, 5℃, 10℃, 25℃, 40℃, 60℃, and 80℃ under pressures up to 14MPa and then mole fractions were calculated, respectively. In general, more solubility of CO₂ is observed in POE than in PAG. Miscibility gap is closed for CO₂/POE mixture but not for CO₂/PAG. |