Local Pool Boiling Heat Transfer on a Nearly Horizontal Tube

Myeong-Gie Kang

doi:10.15866/ireme.v9i2.5659

Local Pool Boiling Heat Transfer on a Nearly Horizontal Tube

Myeong-Gie Kang^(1*)

^(*) Corresponding author

Authors' affiliations

DOI: https://doi.org/10.15866/ireme.v9i2.5659

Abstract

The peripheral changes of local heat transfer coefficients on a near horizontal tube of 50.8 mm diameter are investigated in saturated water at atmospheric pressure. The inclination angle of the tube is varied from the horizontal position to 9° in steps of 3°. The azimuthal angle for the maximum local coefficient approaches to the lowermost regions of the tube circumference as the inclination angle and the heat flux increase. The location of the minimum heat transfer coefficient is observed at the top of the tube and is unchanged regardless of the tube inclination variation. The major mechanisms changing the heat transfer are regarded as the liquid agitation generated by sliding bubbles and bubble coalescence.
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Keywords

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

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