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Experimental analysis of oil flooded R410A scroll compressor

International Journal of Refrigeration
DOI: 10.1016/j.ijrefrig.2014.08.006
  • Flooded Compression
  • Oil Injection
  • Compressor Efficiency
  • Refrigeration
  • Compresseur Noyé
  • Injection D'Huile
  • Efficacité Du Compresseur
  • Froid


Abstract Approaching quasi-isothermal compression is possible by flooding the refrigerant vapor stream with a liquid that has high specific heat to absorb some heat of compression. To evaluate the benefits of liquid flooded compression, an R410A scroll compressor was tested over a wide range of operating conditions while flooding POE oil into the compression chamber using a hot-gas bypass test stand. The experimental results indicate that oil flooded compression leads to an increase in refrigerant mass flow rate and a decrease in compressor discharge temperature. Also, every operating condition has a maximum limit of possible oil injection, which depends on the system pressure ratio and the dimensions of the injection and discharge ports. By fitting the experimental data, a performance map for the compressor with oil flooding is developed using a semi-empirical model. This map can be used to assess the benefits of the oil flooding technology for various conditions employed in other applications.

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