Title: Enhancement of pool boiling heat transfer in a horizontal water layer through surface roughness and screen coverage
Authors: Tsay, JY
Yan, YY
Lin, TF
Department of Mechanical Engineering
Issue Date: 1-Nov-1996
Abstract: An experimental investigation was carried out to study the augmentation of heat transfer in saturated pool boiling of a liquid water layer on a heated horizontal stainless steel plate by roughing the surface and/or covering it with a single layer of stainless steel screen. The results were presented in terms of the boiling curves. Effects of various parameters - the surface roughness, liquid level and size of the stainless steel mesh on the boiling heat transfer were examined in detail. The measured data clearly indicated that a lowering of the liquid level from 60 to 5 mm in water depth causes heat transfer reduction. Roughing the surface was found to significantly enhance the heat transfer. Use a layer of metal screen to cover the heated surface was shown to substantially augment the heat transfer especially for a shallow water layer if the mesh size is comparable with the bubble departure diameter. Covering the rough surface with the metal mesh, however, reduced the heat transfer.
URI: http://hdl.handle.net/11536/944
ISSN: 0042-9929
Volume: 32
Issue: 1-2
Begin Page: 17
End Page: 26
Appears in Collections:Articles