Evaporation of ammonia in a smooth horizontal tube: hear transfer measurements and predictions

O. Zurcher; J. R. Thome; D. Favrat

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Evaporation of ammonia in a smooth horizontal tube: hear transfer measurements and predictions

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Experimental test results for flow boiling of pure ammonia inside horizontal tubes were obtained for a plain stainless steel tube. Tests were run at a nominal saturation temperature of 4℃, nine mass velocities from 20-140 kg/m{sup}2 s, vaporqualities from 1 - 99 percent and heat fluxes from 5-58 kW/m{sup}2. Two-phase flow observations showed that the current test data covered the following regimes: fully stratified, stratified-wavy, intermittent, annular, and annular with partial dryout. The Kattan-Thome-Favrat flow boiling model accurately predicted the local heat transfer coefficients measured in all these flow regimes with only two small modifications to their flow map (to extend its application to G < 100 kg/m{sup}2 s). Their flow boiling model was also successfully compared to the earlier ammonia flow boiling data of Chaddock and Buzzard (1986). The Gungor-Winterton (1987) correlation instead gave very poor accuracy for ammonia.

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《Journal of heat transfer: Transactions of the ASME》 |1999年第1期|89-101|共13页
作者
O. Zurcher; J. R. Thome; D. Favrat;
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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类热力工程、热机;
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Evaporation of ammonia in a smooth horizontal tube: hear transfer measurements and predictions

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