An improved heat transfer correlation for condensation inside inclined smooth tubes
作者： Adekunle O. Adelaja , Daniel R.E. Ewim , Jaco Dirker , Josua P. Meyer
DOI: 10.1016/J.ICHEATMASSTRANSFER.2020.104746
关键词: Heat transfer 、 Heat transfer coefficient 、 Orientation (geometry) 、 Materials science 、 Diabatic 、 Condensation 、 Convection 、 Condensation heat transfer 、 Flow (psychology) 、 Mechanics
摘要: Abstract To date, there has been no robust model that can satisfactorily predict the condensation heat transfer coefficients in smooth tubes when oriented at some angles other than horizontal and vertical. Therefore, it was motivation of this investigation to develop a universally acceptable capable predicting during convective inside inclined subject diabatic conditions. An extensive database experimental results collected from our previous studies used development proposed model. The consisted five hundred fifty-nine data sets for tube orientation varying between - 90o and + 90o, mass velocities 100 kg/m2s 400 kg/m2s, mean vapour qualities 10% 90% saturated condensing temperatures 30 °C 50 °C. showed magnificient agreement with within an global average absolute deviations −5.74% 1.13% respectively. performance new empirical validated flow three sources open literature found them high accuracy.
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