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 Characteristics of Heat Exchange Module for a Water Tube Type Modular Boiler

모듈형 수관식 보일러를 위한 열교환 모듈의 열전달 특성

  • 안준 (국민대학교 기계시스템공학부) ;
  • 김종진 (한국에너지기술연구원) ;
  • 강새별 (한국에너지기술연구원)
  • Received : 2011.12.23
  • Accepted : 2012.01.09
  • Published : 2012.03.10
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Abstract

A finned tube type heat exchange module has been proposed for a multi-burner water tube boiler. Fin density and length increase in streamwise direction to equalize the evaporation for each module, which makes it difficult to apply conventional bulk design procedure. The design program has been improved by updating data for every row of tubes along the flow. A numerical simulation has been also conducted to evaluate the effect of inlet conditions and validated with experiment. The heat transfer of the first row has been underpredicted by the conventional Zhukauskas correlation, since the acceleration of the flow due to the blockage is not fully inflected. The fin tip temperature is also underpredicted by Bessel solution, because of the interaction with neighboring fins.

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References

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