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 Analysis of a Heat Exchanger for an Air-Compressor of a Railway Vehicle Based on Cooling Air Flow Measurement

냉각공기 유속 측정에 기반한 철도차량용 공기압축기 열교환기의 열전달 특성 분석

  • Ahn, Joon (School of Mechanical Engineering, Kookmin University) ;
  • Kim, Moo Sun (Korea Railroad Research Institute) ;
  • Jang, Seongil (Department of Mechanical Engineering, Graduate School, Kookmin University)
  • 안준 (국민대학교 기계공학부) ;
  • 김무선 (한국철도기술연구원) ;
  • 장성일 (국민대학교 대학원 기계공학과)
  • Received : 2017.06.26
  • Accepted : 2017.07.17
  • Published : 2017.09.10
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Abstract

In this study, local velocity distribution of cooling air in a heat exchanger used in an air compressor for a railway car was measured and heat transfer characteristics of the heat exchanger were analyzed. First, heat transfer coefficient and fin performance of the cooling air side were predicted and was checked if the fin of the heat exchanger was effectively used. Distribution of air flow rate at high temperature side was predicted through pipe network analysis and heat resistance at high temperature and low temperature side were predicted and compared. Spatial distribution of temperature in the interior and surface of the square channel constituting high-temperature side was predicted and appropriateness of the size of the heat exchanger was examined. As a result of the analysis, the present size of the heat exchanger could be reduced and it could be effective to promote heat transfer inside the heat exchanger rather than outside to improve performance of the heat exchanger.

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References

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