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http://dx.doi.org/10.5293/kfma.2016.19.4.029

Experimental Study of Air-cooled Condensation in Slightly Inclined Circular Tube  

Kim, Dong Eok (Kyungpook National University)
Kwon, Tae-Soon (Korea Atomic Energy Research Institute)
Park, Hyun-Sik (Korea Atomic Energy Research Institute)
Publication Information
The KSFM Journal of Fluid Machinery / v.19, no.4, 2016 , pp. 29-34 More about this Journal
Abstract
In this study, the experimental investigation of air-cooled condensation in slightly inclined circular tubes with and without fins has been conducted. In order to assess the effects of the essential parameters, variable air velocities and steam mass flow rates were given to the test section. The heat transfer performance of air-cooled condensation were dominantly affected by the air velocity, however, the increase of the steam mass flow rate gave relatively weaker effects to total heat transfer capability. And in the experimental cases with the finned tube, the total heat transfer rate of the finned tube was significantly larger than that of the flat tube. From those results, it can be confirmed that the most important parameter for air-cooled condensation heat transfer is the convective heat transfer characteristics of air. Therefore, for the well-designed long-term cooling passive safety system, the consideration of the optimal design of the fin geometry is needed, and the experimental and numerical validations of the heat transfer capability of the finned tube would be required.
Keywords
Air-cooled Condensation; Air Velocity; Finned Tube; Steam Mass Flow Rate;
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