Journal of Energy Engineering (에너지공학)

The Korean Society for Energy (한국에너지학회)
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Evaluation of Air-side Friction Characteristics on Design Conditions of Slit Fin and Tube Heat Exchanger

슬릿휜-관 열교환기의 설계조건에서 공기측 압력강하 산출

  • Cho, Sung-Chul (Plant Div., LOTTE Engineering&Construction) ;
  • Kim, Chang-Duk (Cluster Promotion Team, Korea Industrial Complex Corp.) ;
  • Kim, Chang-Eob (Department of Electrical Engineering, Hoseo University) ;
  • Kwon, Jeong-Tae (Department of Mechanical Engineering, Hoseo University) ;
  • Lim, Hyo-Jae (Department of Mechanical Engineering, Hoseo University)
  • 조성철 (롯데건설(주) 플랜트사업본부) ;
  • 김창덕 (한국산업단지공단 클러스터추진팀) ;
  • 김창업 (호서대학교 전기공학과) ;
  • 권정태 (호서대학교 기계공학과) ;
  • 임효재 (호서대학교 기계공학과)
  • Published : 2007.09.30
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Abstract

An experimental study on the air-side pressure drop of slit fin-tube heat exchanger has been carried out. The data reduction methodology for air-side pressure drop in the literature is not based on a consistent approach. This paper focuses on method of data reduction to obtain the air-side performance of fin-tube heat exchanger using R22 and recommends standard procedures for dry and wet surface pressure drop estimation in fin-tube heat exchanger. A comparison was made between the predictions of previously proposed empirical correlations and experimental data for the air-side pressure drop on design conditions of condenser and evaporator. Results are pre-sented as plots of friction f-factor against Reynolds number based on the fin collar outside diameter and compared with previous studies. The data covers a range of refrigerant mass fluxes of $150{\sim}250\;kg/m^2s$ with air flows at velocity ranges from 0.38 m/s to 1.6 m/s.

본 연구에서는 슬릿 휜-관 열교환기의 공기측 압력강하 특성을 실험적으로 고찰하였다. 물을 작동유체로 사용한 기존의 실험은 공기측 압력강하에 대해 일관된 방법을 제시하지 못하고 있다. 따라서 본 연구에서는 R22를 적용하여 휜-관 열교환기의 전표면과 습표면에 공기측의 압력강하 특성을 나타내는 표준 방법을 제시하고자 하였다. 기존의 실험 상관식과 본 연구에서 제시한 실험 데이터를 증발기와 응축기의 설계조건에서 레이놀즈수와 f-factor의 관계식으로 나타내었다. 본 실험은 공기의 속도가 $0.38{\sim}1.6\;m/s$ 일 때 냉매의 질량 유속 범위를 $150{\sim}250\;kg/m^2s$하여 수행하였다.

Keywords

References

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