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Second Thermal and Fluids Engineering  Conference

ISSN: 2379-1748
ISBN: 978-1-56700-430-4

Numerical simulation of oil return in compressor gas-liquid separator

Rui Ma
College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, China

Yuting Wu
MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation,Beijing University of Technology, Beijing 100124,China; Beijing Key Laboratory of Heat Transfer and Energy Conversion,Beijing University of Technology, Beijing 100124,China

Chun-Xu Du
College of Environmental and Energy Engineering, Beijing University of Technology

Xia Chen
MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation,Beijing University of Technology, Beijing 100124,China; Beijing Key Laboratory of Heat Transfer and Energy Conversion,Beijing University of Technology, Beijing 100124,China

De-lou Zhang
College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, China

Chong-Fang Ma
MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation,Beijing University of Technology, Beijing 100124,China; Beijing Key Laboratory of Heat Transfer and Energy Conversion,Beijing University of Technology, Beijing 100124,China

Abstract

Vapor compression heat pump has good significance for future space applications. Compressor is a key component of vapor compression heat pump. Oil return characteristics of compressor gas-liquid separator require to be verified whether it can operate normally under microgravity. Mathematical model of gas-liquid separator was built and oil-gas mixture inside was simulated by Fluent. The influence of gravity on phase distribution and the effect of lubricating oil amount and speed on flow field under microgravity were all explored. The simulation results showed that refrigerant and lubricating oil composition could smoothly flow back when compressor inlet velocity was greater than 10m/s or gravitational acceleration was less than 0.04m/s2. Although gas-liquid separator was not affected in microgravity, the study of gravity on compressor operation and experimental performance would be carried out follow-up.

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