Pool Boiling Heat Transfer in Narrow Horizontal Annular Crevices

Author:

Hung Ying-Huei1,Yao Shi-Chune2

Affiliation:

1. Dept. of Power Mechanical Engineering, National Tsing Hua University, Taiwan, Republic of China

2. Department of Mechanical Engineering, Carnegie-Mellon University, Pittsburgh, PA 15213

Abstract

Experimental results of the pool boiling in horizontal narrow annuli are reported. The effects of fluid properties, pool subcooling, crevice length, and gap size on the boiling behavior and the critical heat flux (CHF) are also studied. The CHF decreases with decreasing gap size or increasing length of the annuli. The lower CHF of narrow crevices may be explained by the thin film evaporation. A semi-empirical correlation is established for the CHF of pool boiling in horizontal confined spaces. This correlation is compared with the CHF data of the present experiment. Satisfactory agreement is obtained.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

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