Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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An Experimental Study on the Optimization of the Performance Characteristics of a Refrigeration System Using R-600a and R-134a

R-600a 및 R-134a를 공용으로 사용한 소형 냉동사이클의 성능 특성 최적화에 대한 실험적 연구

  • Jang, Eui-Sung (Graduate School of Mechanical Engineering, Korea University) ;
  • Yoon, Won-Jae (Graduate School of Mechanical Engineering, Korea University) ;
  • Chung, Hyun-Joon (Graduate School of Mechanical Engineering, Korea University) ;
  • Jung, Hae-Won (Graduate School of Mechanical Engineering, Korea University) ;
  • Kim, Yong-Chan (Department of Mechanical Engineering, Korea University)
  • 장의성 (고려대학교 기계공학과 대학원) ;
  • 윤원재 (고려대학교 기계공학과 대학원) ;
  • 정현준 (고려대학교 기계공학과 대학원) ;
  • 정해원 (고려대학교 기계공학과 대학원) ;
  • 김용찬 (고려대학교 기계공학과)
  • Received : 2009.12.29
  • Accepted : 2010.02.04
  • Published : 2010.05.10
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Abstract

Because both R-134a and R-600a are used as a refrigerant of a household refrigerator in the global market, the home-appliance industry needs an optimized cycle for both refrigerants. The objective of this study is to provide the design guideline on the optimization of a refrigeration system using both refrigerants. For both refrigerants, the performance characteristics of the refrigeration system were tested by varying refrigerant charge amount, capillary tube length, suction diameter and SLHX length. The tested refrigeration system was optimized at the refrigerant charge of 60 g and the capillary tube length of 3600 mm with R-134a, and the refrigerant charge of 34 g and the capillary tube length of 3900 mm with R-600a. The COP increased from 1.63 to 1.68 for R-134a and increased from 1.37 to 1.48 for R-600a, respectively, by applying the suction diameter expansion. In addition, the COP of the R-134a and R-600a system decreased by 2.3~2.4% as the SLHX length decreased by 300 mm.

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References

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