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A Study on Heat Transfer Enhancement of Oil Cooler

유냉각기의 열전달 촉진에 관한 연구

  • 조동현 (대진대학교 컴퓨터기계설계공학과) ;
  • 임태우 (한국해양대학교 기관시스템공학부)
  • Received : 2010.05.04
  • Accepted : 2010.10.28
  • Published : 2011.06.30

Abstract

A shell-and-tube oil cooler with plate fins was suggested to improve the defect of the conventional shell-and-tube oil cooler. Experiments were conducted to evaluate the heat transfer performance on the shell side of shell-and-plate finned tube oil cooler with three different tube numbers(9, 13 and 19). Oil flowing on the shell side was cooled by cold water flowing inside the tubes. A shell-and-tube heat exchanger of an oil cooler consisted of one shell pass and two tube passes with the inner tube diameter of 8.82 mm and the tube length of 575 mm. From the experiment of shell-and-tube oil cooler, it was found that the heat transfer coefficient of oil cooler with 9 tubes, as oil flow rate was increased, was approximately 140% and 250% higher than that of 13 and 19 tubes, respectively. The heat transfer coefficient at the water flow rate of $3m^3/h$, also was 120% and 140% higher than that of 2.4 and $1.8m^3/h$, respectively.

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