Pressure drop correlation for oil–refrigerant R134a mixture flashing flow in a small diameter tube (original) (raw)
2009, International Journal of Refrigeration
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Industrial Lubrication and Tribology, 2013
Purpose – Refrigerant fraction and mixture viscosity values were determined for various operating conditions of compressors. The paper aims to discuss these issues. Design/methodology/approach – In this study, an experimental setup that can be used to obtain refrigerant mass fraction and mixture viscosity data is designed and constructed. With the experimental setup, R600a mineral and R134a polyolester compressor lubricant mixtures were examined. Findings – This study presents an experimental procedure for obtaining practical results related to refrigerants used in the refrigeration system. Some properties of refrigerant-lubricant mixtures are very important for the design of compressors and performance of the refrigeration cycle. Originality/value – The paper is of value in presenting an experimental procedure for obtaining practical results pertaining to the tribological and other properties performance of the refrigerants.
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