| Title |
Correlations of Oil Concentration Prediction during In-line Flowof CO2/Oil Mixtures |
| Authors |
박근서(Keun Seo Park) ; 강병하(Byung Ha Kang) ; 박경근(Kyoung Kuhn Park) ; 김석현(Sukhyun Kim) |
| Keywords |
농도 ; 오일 ; POE ; PAG ; 비중 ; 이산화탄소 Concentration ; Oil ; Polyol ester ; Poly akylene glycol ; Specific gravity ; Carbon dioxide ; |
| Abstract |
In the general vapor-compression refrigeration system, refrigeration lubricant circulates in refrigeration system with refrigerant. Knowledge of the amount of circulating lubricant is very important to exactly calculate capacity of the refrigeration system. An ex-perimental study was conducted to estimate the oil concentration of a flowing CO2/Oil mix-tures. POE and PAG oil are considered as test lubricants in this study. Performance tests were conducted under simulated liquid conditions for CO2/POE oil mixture in oil concentration of 0 to 10 weight-percent and CO2/PAG oil mixture in oil concentration of 0 to 6 weight- percent in the temperature ranges of -5℃ to 15℃. The results obtained indicate specific gravity of CO2/oil mixture is increased as oil concentration is increased and as temperature of mixture is decreased. Oil concentration correlation of CO2/POE oil mixture and CO2/PAG oil mixture is suggested, based on the measurement of specific gravity and temperature. This correlation enable to predict the oil concentration without extraction of the mixture and can be applied for CO2/POE mixtures and CO2/PAG mixtures. |