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나선형비틈관과 내부핀부착관에서의 관내 응축 열전달 및 압력강하 특성
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  • 나선형비틈관과 내부핀부착관에서의 관내 응축 열전달 및 압력강하 특성
  • Characteristics of In-Tube Condensation Heat Transfer and Pressure Drop in a Spirally-Twisted Tube and an Internally-Finned Tube
저자명
이상천,신현승
간행물명
大韓機械學會論文集
권/호정보
1994년|18권 1호|pp.203-211 (9 pages)
발행정보
대한기계학회
파일정보
정기간행물|
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기타
이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

An experiment was carried out to evaluate the heat transfer and pressure drop performances of the smooth tube and two augmented tubes using R-113 under horizontal condensation condition. The augmented tubes are a spirally-twisted tube and an internally-finned tube. The test tube is 13.88 mm in diameter and 3.2 m long. Five different inlet pressure of 0.13, 0.16, 0.18, 0.21 and 0.23 MPa were employed and the mass flux was varied from 80 to 265 $kg/m^{2}s.$ The results showed that the overall heat transfer coefficient for the spirally-twisted tube and internally-finned tube were enhanced by 30-85% and 130-180%, respectively, over that for the smooth tube. The increase in total pressure drop for the spirally-twisted tube and internally-finned tube were reached up to 250-350% and 1100-1600%, respectively, over that for the smooth tube. Correlations were proposed for predicting the condensation heat transfer coefficient for the smooth tube and two augmented tubes.