| 摘要 |
PURPOSE:To improve heat transmitting efficiency of heat transfer plate, by placing on heat transfer surface a plurality of plates having a porous layer, promoting separation of bubbles by developing flow of evaporated liquid, and promoting evaporation of liquid by removing the bubbles toward the downstream of liquid flow. CONSTITUTION:Porous layer 3 is formed on the surface of heat transfer plate 1 by heating the same until grains 2 is molten and blowing high-temperature gas onto the surface of plate 1. By use of such a heat transfer plate 1 thus obtained, evaporated liquid supplied is heated by heat transfer plate 1 and superficial grains 2 and causes nuclear boiling through the concentrated heating. This promotes generation of bubbles 6 from the heat transfer surface, causing flow of bubbles toward the surface of porous layer 3 through increasing of buoyancy, and detachment of bubbles 6 from porous layer 3 by the function of liquid flow 7 in the liquid passage. At the result, bubbles 6 are caused to flow downward along the liquid flow 7, so that bubble flow is formed along the surface of porous layer 3.
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