| 摘要 |
PURPOSE:To enable to easily produce a high-efficiency heat-transmitting wall capable of enhancing the efficiency of transmitting heat of boiling. CONSTITUTION:When the heat-exchanging wall 9 is heated to a temperature higher than the temperature of a liquid making contact therewith, vapor bubbles are generated in cavities 11 to fill up the cavities 11, and when the pressure of the bubbles is raised above the pressure of the liquid surrounding them, part of the bubbles is discharged through through-holes 12, while the rest of the bubbles is retained in the cavities 11 as residual vapor bubbles. In this case, the pressure in the cavities 11 is changed, and the liquid flows into the cavities 11 through the through-holes 12 through which the bubbles have been discharged and other through-holes 12. The liquid thus flowing in is conveyed to the four corners of each of the cavities 11 by capillary action, and a liquid film forms an extremely thin meniscus. Since the inflow port of the through-hole 12 has a smooth conical shape and is connected directly to the corners of the cavity 11, the liquid can flow in easily, so that the replenishement of the liquid for the evaporation of the thin liquid film is performed smoothly. In producing the heat- exchanging wall 9, perforation of a skin 10 and welding thereof can be performed in one step by laser working or other similar method. |
