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RESEARCH PAPERS: Boiling and Condensation

A Parametric Study of Nucleate Boiling on Structured Surfaces, Part II: Effect of Pore Diameter and Pore Pitch

[+] Author and Article Information
Liang-Han Chien

Department of Mechanical Engineering, Chang-Gung University, Kwei-Shan, Taiwan, ROC

R. L. Webb

Department of Mechanical Engineering, The Pennsylvania State University, University Park, PA 16802

J. Heat Transfer 120(4), 1049-1054 (Nov 01, 1998) (6 pages) doi:10.1115/1.2825889 History: Received December 02, 1996; Revised June 07, 1998; Online December 05, 2007

Abstract

This two-part experimental work identifies the effect of geometric dimensions on the boiling performance of “tunneled” enhanced boiling surfaces, which is similar to the Hitachi Thermoexcel-E surface. Tests were performed on a horizontal tube using R-11 and R-123 at 26.7°C for heat fluxes from 2 to 70 kW/m2 . This second part of the study defines the effect of the pore dimensions (pore diameter and pore pitch). The pore diameters are 0.12, 0.18, 0.23, and 0.28 mm and the pore pitches are 0.75, 1.5, and 3.0 mm. The results are interpreted to explain the relationship between pore diameter and pore pitch on the boiling performance.

Copyright © 1998 by The American Society of Mechanical Engineers
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