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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Heat Transfer and Pressure Drop Characteristics of Brazed Plate Heat Exchangers with Single-Phase Flow

단상유동 조건에서 용접형 판형 열교환기의 열전달 및 압력강하 특성연구

  • Kim, Man Bae (Graduate School of Engineering, Seoul National University of Science and Technology) ;
  • Park, Chang Yong (Department of Mechanical System Design Engineering, Seoul National University of Science and Technology)
  • 김만배 (서울과학기술대학교 대학원) ;
  • 박창용 (서울과학기술대학교 기계시스템디자인공학과)
  • Received : 2014.08.05
  • Accepted : 2014.09.18
  • Published : 2014.11.10
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Abstract

This experimental study measured and analyzed the heat transfer and pressure drop performance of brazed plate heat exchangers. Heat exchangers with different plate numbers of 10, 20, 30, and 40 were used for measurement, and their plate pattern was identical. The experiment was performed with distilled water, by changing the hot-side flow rate, with the cold-side flow rate fixed. The experimental results were compared with the calculated values by correlations based on gasketed plate heat exchangers, and showed that the heat transfer performance and pressure drop of brazed plated heat exchangers were higher than those of gasketed plate heat exchangers. From the variation of the friction factor, it could be inferred that in the flow channels of brazed plate heat exchangers, turbulent flow occurred at Reynolds numbers higher than 500. A new correlation to predict the Nusselt number was developed, and its absolute average deviation was 2.62%, compared with the values from the experimental data.

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References

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