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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Experimental Study on Leak Flow Rate and Inner Flow Characteristics of Plate Heat Exchangers with Pin-hole Location and Mass Flux

판형열교환기 핀 홀의 위치 및 유속에 따른 누수율 및 내부 유동 특성에 관한 실험적 연구

  • Song, Kang Sub (Department of Mechanical Engineering, Graduate School Korea University) ;
  • Baek, Chanhyun (Department of Mechanical and Control Engineering, The Cyber University of Korea) ;
  • Kim, Sung Woo (Department of Mechanical Engineering, Graduate School Korea University) ;
  • Kim, Yongchan (Department of Mechanical Engineering, Korea University)
  • 송강섭 (고려대학교 기계공학과 대학원) ;
  • 백창현 (고려사이버대학교 기계제어공학과) ;
  • 김성우 (고려대학교 기계공학과 대학원) ;
  • 김용찬 (고려대학교 기계공학과)
  • Received : 2016.01.20
  • Accepted : 2016.04.08
  • Published : 2016.05.10
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Abstract

Plate heat exchangers have been widely used in various fields because of their high heat transfer coefficients, small area of installation, and ease of maintenance compared to other heat exchangers. However, when plate heat exchanger is used for a long time, leak can occur due to inner crack. Therefore, it is important to understand the inner flow characteristics in plate heat exchangers. In this study, the inner flow characteristics and flow rate of plate heat exchanger were evaluated using various flow directions, pin-hole sizes, and Reynolds numbers. In downflow, initially most water flowed to the opposite of the inlet due to distribution region. Then it gradually had a uniform distribution due to chevron configuration. In upflow, it had a uniform flow consistently due to the dominant gravity effect. As the Reynolds number increased, the leak rate was decreased due to the inertia effect regardless of the flow direction.

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References

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