Influence Of Lubricant Viscosity Of POES On The Performance Of Hermetic Reciprocating Compressors

HFC-134a is used as working fluid in refrigerators widely. However, how to improve the efficiency of compressor and refrigerator is major topic in the word. The purpose of this study is aimed at the performance evaluation of compressors with different viscosity of POEs oil. A hermetic reciprocating compressor using HFC-134a as refrigerant was adopted and the experimental investigation was carried out on a calorimeter. Four type of viscosity of POEs oil and three test conditions having different compression ratios were used. The results indicated the viscosity of lubricants influenced refrigerant mass flow rate, cooling capacity, input power, E.E.R. and discharge temperature at different operation conditions of the compressor, the range of variation were 1.31~2.14%, 1.28~2.17%, 3.23~4.69%, 1.92~2.76% and 3.52~5.18%, respectively.