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Effects of Included Angle on Local Pool Boiling of V-Shape Tubes


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DOI: https://doi.org/10.15866/ireme.v14i6.17983

Abstract


The effect of the angle included between the V-shaped tubes on the local pool boiling heat transfer of the tube surface submerged in saturated water at atmospheric pressure is experimentally studied. The tube is made of stainless steel, the surface is smoothed through machining, and the diameter and length of the heating section are 19mm and 400mm, respectively. The included angle is adjusted between 2 and 18 degrees. The three V-shaped tubes consist of (1) top horizontal and bottom slope, (2) vertical symmetry and (3) top slope and bottom horizontal. As the shape changes, the effect of the flow moving from the bottom tube to the top changes, and a distinct difference in heat transfer according to the shape is observed. When the distance between the upper tube and the lower tube is the smallest, the bundle effect is found to be greatest. The most important heat transfer mechanism is judged by liquid agitation due to convective flow and bubble movement, and the concentration and dispersion of flow and turbulence development are also considered as important factors.
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Keywords


Pool Boiling; Tube Inclination; Local Heat Transfer; Nuclear Reactor Design

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References


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