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 Performance Characteristics of a Single-Circuit Multi Cycle and a Bypass Two-Circuit Multi Cycle

단일유로 멀티사이클 및 바이패스유로 멀티사이클 적용 냉동시스템의 성능특성에 관한 실험적 연구

  • Song, Young-Seung (Department of Mechanical Engineering, Graduate School of Korea University) ;
  • Jung, Hae-Won (Department of Mechanical Engineering, Graduate School of Korea University) ;
  • Yoon, Won-Jae (Department of Mechanical Engineering, Graduate School of Korea University) ;
  • Kim, Yong-Chan (Department of Mechanical Engineering, Korea University)
  • 송영승 (고려대학교 기계공학과 대학원) ;
  • 정해원 (고려대학교 기계공학과 대학원) ;
  • 윤원재 (고려대학교 기계공학과 대학원) ;
  • 김용찬 (고려대학교 기계공학부)
  • Received : 2010.12.14
  • Accepted : 2011.06.15
  • Published : 2011.07.10
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Abstract

The object of this study is to investigate the performance characteristics of refrigerators using a single-circuit multi cycle and a bypass two-circuit multi cycle. Each refrigeration cycle was tested by varying secondary fluid mass flow rate and temperature. Based on the experimental data, the optimum refrigerant charge was 48 g and the COP at the optimum secondary fluid mass flow rate was 1.53 for the single-circuit multi cycle. For freezer(F)-only mode, both the single-circuit multi cycle and the bypass two-circuit multi cycle were operated at overcharge conditions, resulting in an increase of the secondary fluid mass flow rate. The maximum COPs of the single-circuit multi cycle and the bypass two-circuit multi cycle were 1.22 and 1.35, respectively. The COP increased by 10.7% with the application of the bypass two-circuit multi cycle.

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References

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