Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)
- Volume 10 Issue 6
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- Pages.732-742
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- 1998
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- 1229-6422(pISSN)
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- 2465-7611(eISSN)
Prediction of condensation heat transfer coefficients inside horizontal tube in annular flow regime
환상유동 영역에서의 수평관내 응축 열전달계수 예측
- Published : 1998.11.01
Abstract
Prediction method for heat transfer coefficients in a horizontal smooth tube with forced convection condensation is proposed. In this paper, the analogy between momentum and heat transfer was applied to an annular flow regime and the logarithmic velocity distribution is applied to describe the velocity profile within the liquid film. Prediction results are compared with those of experimental ones. The test refrigerants are R113, R22, R134a, R407C(R33/R125/R134a, 23/25/52 wt%), R410A(R32/R125, 50/50 wt%) and R134a+R123(R134a/R123, 85.5/14.5 wt%) which are used under operating conditions in a condenser of air-conditioner. The proposed prediction method shows good agreement with experimental data within