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首页> 美国政府科技报告 >Effect of calcium sulfate on pool boiling of enhanced heat transfer surfaces.
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Effect of calcium sulfate on pool boiling of enhanced heat transfer surfaces.

机译：硫酸钙对强化传热表面池沸腾的影响。

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This paper describes experiments carried out to investigate the effect of precipitation fouling under nucleate pool boiling conditions on the heat transfer of a number of commercially available enhanced heat transfer surfaces. The effects of time of exposure, level of the heat flux, and form of the surface enhancement were investigated. The test fluid was a saturated aqueous solution of calcium sulfate in which the surfaces were continuously exposed for up to 20 hour. The results indicate that fouling, indicated by the change in the wall superheat, occurs immediately on exposure of the test surface to the fluid and the effect becomes constant within two to five hours of five hours of first exposing the surface. The effect of precipitation fouling is greater at higher heat fluxes. The effects of fouling depend on the geometry of the surface enhancement with those surfaces having the lower superheat under clean conditions also exhibiting a lower effect of fouling. 15 refs., 10 figs.

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