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- 저자 : 강희찬 (검색결과 221 건)
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강희찬 한국에너지학회 2014 한국에너지공학회 학술발표회 Vol.2014 No.4
The present work proposes an empirical correlation for convective heat transfer coefficients for louver fin geometry of heat exchanger that is less dependent on the conduction resistance of the fins; fin thickness, material and air temperature variation. The present model predicts greater convective heat transfer coefficient than the previous model up to five percent.
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강희찬,조동영,강민철 대한설비공학회 2003 설비공학 논문집 Vol.15 No.9
An experimental study was conducted to investigate the heat transfer characteristics of a circular finned-tube heat exchanger. The nineteen cases of configuration varying fin material, fin outer diameter and fin pitch were tested by means of the experiment and the numerical calculation. The measured heat transfer data for the circular finned-tube heat exchanger were provided. A transition of heat transfer was found in the case of low fin pitch. The thermal conductivity of fin affected on the pure heat transfer coefficient.
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판형 휜을 갖는 열교환기의 휜효율에 관한 수치해석적 연구
강희찬 대한설비공학회 1999 설비공학 논문집 Vol.11 No.6
This study is discussed about the heat transfer coefficient and the fin efficiency of the heat exchanger having plate fins. A new definition for the fin efficiency of the heat exchanger is proposed. More than one hundred cases were tested numerically for the plate fins having uniform and non-uniform heat transfer coefficient. The previous models for the fin efficiency and the pure heat transfer coefficient were applicable to the heat exchanger only when the NTU is very small. It was found that the fin efficiency of the heat exchanger was nearly the same as the normalized fin temperature. The present model could estimate the pure heat transfer coefficient within a few percent in the present test range of 0<NTU<2.5.
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