滴状凝縮時の熱伝達の研究 : 第2報蒸気圧力の影響

概要

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We experimentally investigated on the heat transfer by dropwise condensation of saturated steam on a vertical flat condensing surface (effective area was 21×6cm^2) promoted by oleic acid, particularly to make clear the effects of steam pressure on the heat transfer, in a pressure range of 17.5〜1140 mmHga. The following results are obtaind : (1) When the flow rate of cooling water is constant, the heat load on the condensing surface is proportional to the square root of the steam pressure. (2) The steam-side coefficient of heat transfer is almost independent of the flow rate of cooling water, and it increases it proportion to the 1/4 power of the steam pressure. (3) The overall coefficient of heat transmission from steam to cooling water decreases by about 10%, as the steam pressure is reduced from 1 ata to 0.1 ata.
一般社団法人日本機械学会の論文
1956-08-25