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

  • 제29권11호
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  • Pages.570-579
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  • 2017
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  • 1229-6422(pISSN)
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  • 2465-7611(eISSN)
대한설비공학회 (The Society of Air-Conditioning and Refrigerating Engineers of Korea)
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철도차량용 공기압축기의 열교환기 최적 설계를 위한 해석 연구

Numerical Analysis for Optimal Design of Heat Exchanger in Air Compressor for Railroad Vehicle

  • 김무선 (한국철도기술연구원 광역도시철도융합연구실) ;
  • 정종덕 (한국철도기술연구원 광역도시철도융합연구실) ;
  • 장성일 (국민대학교 대학원 기계공학과) ;
  • 안준 (국민대학교 기계공학부)
  • Kim, Moo Sun (Metropolitan Transit Convergence Research Division, Korea Railroad Research Institute) ;
  • Chung, Jong Deok (Metropolitan Transit Convergence Research Division, Korea Railroad Research Institute) ;
  • Jang, Seongil (Department of Mechanical Engineering, Graduate School, Kookmin University) ;
  • Ahn, Joon (School of Mechanical Engineering, Kookmin University)
  • 투고 : 2017.08.08
  • 심사 : 2017.09.22
  • 발행 : 2017.11.10
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초록

In this study, we examined the multi-stage piston-type air compressors typically used in a railroad vehicle, and the heat transfer efficiency was analyzed according to the design conditions of the heat exchanger (a compressor component module for cooling the compressed high temperature air). For the fin-tube heat exchanger used in the most air compressors, numerical analysis was performed to analyze heat transfer by defining the various rectangle tube sizes and the number of fin-per-unit area as design variables under the same flow rate of compressed air. Also, this analysis compared the temperature of the compressed air. Regarding environmental conditions for analysis, the flow rate of the external cooling air was measured and the mean value of the values was applied. And a "turbulence model" was considered in both the external flow of the cooling air and the internal flow inside the tube. From the results of analysis, it was found that the change of the aspect ratio value of the tube greatly influences the heat transfer efficiency of the compressed air, and influences if the fin density is relatively small. As a result, the optimum design specifications of the heat exchanger for air compressors were confirmed based on the analysis of the heat transfer efficiency, according to the design conditions of fin and tube by the operating temperature range of the compressed air.

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참고문헌

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