Boiling Heat-Transfer Performance at Critical Water Level in a Porous Bed
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概要
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An experimental investigation has been conducted to determine boiling heat-transfer performance at the critical water level in a porous bed. The porous bed contained in a vertical circular cylinder was made up of packed spherical beads whose diameters ranged from 2.0 to 16.2 mm. Four kinds of the particles of glass, alumina, steel, and copper beads were adopted as the testing beds. Measurements were carried out as the temperature difference ΔT_s between the heating surface and saturated water varied from 0.2 to 8.3 K. It was observed that there might be a critical water level at which a maximum boiling heat-transfer coefficient took place for a given ΔT_s. The critical water-level condition was carefully obtained by injecting the saturated water. The boiling heat flux was found to be relatively independent of ΔT_s for smaller ΔT_s values, while it tends to level off as ΔT_s increases for small bead diameters.
- 一般社団法人日本機械学会の論文
- 1988-08-15
著者
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Fukusako Shoichiro
Faculty Of Engineering Hokkaido University
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Seki Nobuhiro
Hokkaido Polytechnical College
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Eguchi Norio
Faculty Of Engineering Hokkaido University
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