대한설비공학회:학술대회논문집 (Proceedings of the SAREK Conference)
- 대한설비공학회 2005년도 동계학술발표대회 논문집
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- Pages.274-280
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- 2005
독립 핀-튜브 열교환기의 열전달 성능특성에 관한 연구
Study on Heat Transfer Characteristics of Discrete Fin-and-tube Heat Exchangers
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Lee, Ho-Seong
(Graduate School of Mechanical Engineering, Korea University) ;
- Kim, Yong-Han (Samsung Electronics DA R&D Center) ;
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Choi, Jong-Min
(Department of Mechanical Engineering, Hanbat National University) ;
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Kim, Yong-Chan
(Department of Mechanical Engineering, Korea University)
- 발행 : 2005.11.25
초록
The objective of this study Is to investigate the heat transfer performance of plate discrete fin-and-tube heat exchangers with large fin pitch. In this study, twenty-two heat exchangers were tested with a variation of fin pitch, number of tube row, longitudinal tube pitch and fin alignment. Discrete fin type exchangers improved heat transfer performance more than 10% compared to tile continuous fin type heat exchangers. The air-side heat transfer coefficient decreased with a reduction of the fin pitch and an increase of the number of tube row, The staggered fin alignment improved heat transfer performance more than 6% compared to the inline fin alignment. The effect of longitudinal tube pitch was insignificant on the j-factor and experiments found opposite effects on the j-factor with respect to fin alignment. Heat transfer correlations were developed from the measured data for flat plate discrete fin-and-tube heat exchangers with large fin pitch. The correlations yielded good predictions of the measured data with mean deviations of 1,4% and 0.3% for tire inline and staggered tube alignment, respectively.