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이원종(Won-Jong Lee),곽천동(Tiandong Guo),정지환(Ji-Hwan Jeong) 대한설비공학회 2012 대한설비공학회 학술발표대회논문집 Vol.2012 No.11
Polyol Ester oil-air two-phase counter current flow experiments were performed with small diameter tubes to measure gas velocities for the counter current flow limitation (CCFL) point and the flow reversal point. The test section was made of a Pyrex glass tube to allow visual observation. The geometry of the test section was designed to simulate various shape of suction line of refrigerators. The inner diameter of the test tube was 7 mm and the height was 1 m. The inclination of test tubes varied from vertical to crank type with various horizontal lengths. An empirical oil return criterion was suggested based on the flow reversal points. This criterion was also verified using a refrigerator test apparatus and R-600a.
이원종(Won Jong Lee),곽천동(Tiandong Guo),정지환(Ji Hwan Jeong) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
Polyol Ester oil-air two-phase counter current flow experiments were performed with small diameter tubes to measure gas velocities for the counter current flow limitation (CCFL) point and the flow reversal point. The test section was made of a Pyrex glass tube to allow visual observation. The geometry of the test section was designed to simulate various shape of suction line of refrigerators. The inner diameter of the test tube was 7 ㎜ and the height was 1 m. The inclination of test tubes varied from vertical to crank type with various horizontal lengths. An empirical oil return criterion was suggested based on the flow reversal points. This criterion was also verified using a refrigerator test apparatus and R-600a.