The KSFM Journal of Fluid Machinery (한국유체기계학회 논문집)

Korean Society for Fluid machinery (한국유체기계학회)
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A Combined Rotary Compressor-vane Expander

일체형 로타리 압축기-베인 팽창기

  • Kim, Hyun Jin (Incheon National University Mechanical Engineering and Robotics) ;
  • No, Young Jae (Incheon National University Mechanical Engineering and Robotics) ;
  • Kim, Yong Hee (Incheon National University Graduate School)
  • 김현진 (인천대학교 기계시스템공학부) ;
  • 노영재 (인천대학교 기계공학부) ;
  • 김용희 (인천대학교 대학원)
  • Received : 2014.10.31
  • Accepted : 2015.05.20
  • Published : 2015.06.01
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Abstract

As a means of improving cycle performance of a R410A air-conditioning system, a combined structure of compressor and expander was introduced. A vane rotary type expander was designed to share a common shaft with twin type rolling piston rotary compressor in a housing. Numerical simulation on the performance of the combined compressor and expander was carried out. At ARI condition, the volumetric and total efficiencies of the designed vane expander were 69.37% and 30.23%, respectively. With the application of this expander, the compressor input was reduced by 3.91%, and the cooling capacity was increased by 3.98%. As a result, COP of the air-conditioning system was improved by 8.2%. As the pressure difference between the condenser and the evaporator becomes large, COP improvement increases unless the mass flow rate in the expander exceeds that in the compressor.

Keywords

References

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