Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Thermal Design of a Cooling Coil for Building Air Conditioning

건물 공조용 냉수 코일의 열 설계

  • Kim, Nae-Hyun (Department of Mechanical System Engineering, University of Incheon) ;
  • Byun, Ho-Won (Department of Mechanical System Engineering, University of Incheon)
  • 김내현 (인천대학교 기계시스템공학과) ;
  • 변호원 (인천대학교 기계시스템공학과)
  • Received : 2015.06.10
  • Accepted : 2015.10.08
  • Published : 2015.10.31
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Abstract

The surface of the cooling coil becomes dry, wet or partially wet depending on the operating condition. Thus, a proper design of the cooling coil should include a heat transfer analysis on dry, wet or partially wet surfaces. In this study, an elementary model, which analyzes the cooling on an elementaty basis, is proposed. Comparison of the predictions of the model with experimental data of the cooling coil revealed that heat transfer rates were predicted within 10.1%, airside pressure drop within 11.1% and sensible heat ratio within 5.7%. The model was used to investigate the effect of water circuitory on cooling coil performance.

건물용 공기조화기의 냉수 코일은 작동조건에 따라 건표면, 습표면 또는 부분적인 습표면이 형성된다. 따라서 냉수코일을 적절히 설계하기 위해서는 건표면과 습표면, 그리고 부분적 습표면에 대한 열전달 해석이 필요하다. 본 연구에서는 미소체적에 대한 해석을 통하여 냉수코일의 성능을 계산하는 미소체적 모델을 제시하였다. 해석 모델의 예측치를 냉수코일 실험결과와 비교한 결과 미소 체적 모델은 공기측 전열량을 10.1% 이내에서 예측하고 공기측 압력손실을 11.1%, 현열비도 5.7%내로 예측하였다. 해석 모델을 활용하여 물측 회로의 변화가 냉수코일의 성능에 미치는 영향을 검토하였다.

Keywords

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