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Experimental Vapor-Liquid Equilibra for $CO_2/Oil$ Systems in the Range of Compressor Working Pressure  

Lee, Chi-Seok (Graduate School, Kookmin University)
Lee, Kyoung-Youl (Graduate School, Kookmin University)
You, Han-Yeon (Graduate School, Kookmin University)
Kang, Byung-Ha (School of Mechanical and Automotive Engineering, Kookmin University)
Park, Kyoung-Kuhn (School of Mechanical and Automotive Engineering, Kookmin University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.19, no.3, 2007 , pp. 213-219 More about this Journal
Abstract
An experimental apparatus was constructed to obtain vapor-liquid equilibrium data for $CO_2/oil$ mixtures using mass analysis method with sample cylinder. Lubricants employed were POE (poly-ol ester) and PAG (poly alkylene glycol). The phase equilibria of $CO_2/oil$ mixtures prevailed in an equilibrium cell were observed through a couple of sight glasses at the opposite ends. Data were obtained over the temperatures $-10^{\circ}C,\;-5^{\circ}C,\;0^{\circ}C,\;5^{\circ}C,\;10^{\circ}C,\;25^{\circ}C,\;40^{\circ}C,\;60^{\circ}C,\;and\;80^{\circ}C$ under pressures up to 14 MPa and then mole fractions were calculated, respectively In general, more solubility of $CO_2$ is observed in POE than in PAG. Miscibility gap is closed for $CO_2/POE$ mixture but not for $CO_2/PAG$.
Keywords
Carbon dioxide; POE; PAG; Vapor-liquid equilibrium;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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