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Experimental Research on Pool Boiling Heat Transfer from a Spraying Porous Surface(PDF)

南京师范大学学报（工程技术版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2001年03期
Page:
12-16
Research Field:
Publishing date:

Info

Title:
Experimental Research on Pool Boiling Heat Transfer from a Spraying Porous Surface
Author(s):
Zhao Xiaobao
College of Power Engineering,Nanjing Normal University,Nanjing,210042,PRC
Keywords:
spraying porous surface;  boiling heat transfer;  critical heat flux;  boiling hysteresis
PACS:
TK124
DOI:
-
Abstract:
Boiling heat transfer on the flame spraying porous surface was experimentally studied. The tested spraying porous layers were made of gear bronze with three different thickness. Distilled water, ethyl alcohol and R-113 were used as working liquids. The experimental was performed at the saturated temperature under local atmospheric pressure. The experimental results show that for such porous layer, the wall superheat required to initiate boiling is low, the boiling heat transfer coefficient can be higher than that of smooth plane surface by about twofold to fivefold. At the same time, the critical heat flux of such spraying porous layer is also higher than that of smooth plane, and it can enhance the boiling heat transfer within wide heat flux range. The experiment also reveals that the boiling hysteresis is not serious. The spraying technique not only has the advantages of simple equipment, convenient operation and low cost, but also can be suited for irregular base surface with complex geometry shapes. So, the spraying porous surface is a promising type of wick structure for heat pipe and vapor chamber.

References:

[ 1]  O Neill P S, Gottzman C F, Terbot J W. Novel Heat Exchanger lncrease Cascade Cycle Efficiency for Natural Gas Liquefaction[ C] . In Advances sin Cryogenic Engineering, Timmerhaus, K. D, ed. Plenum, New York, 1972: 420~ 437
[ 2] Bergles A E, Chyu M C. Characteristics of Nucleate Pool Boiling from Porous Metallic Coatings[ J] . Journal of Heat Transfer, 1982, 104( 2) : 279~ 285
[ 3]  Nishikawa K Ito T. Augmentation of Nucleate Boiling Heat Transfer by Prepared Surfaces[ C] . In Heat Transfer in Energy Problem,Mizushina, T. and Yang,W. J. eds.Hemisphere,Washington, D. C, 1982: 111~ 118
[ 4] Afgan N H, Jovic L A, Kovalev S A, et al . Boiling Heat Transfer from Surfaces with Porous with Porous Layer[ J] . Int J Heat and Mass Transfer, 1985, 28( 2) : 415~ 422
[ 5]  DahlM M, Erb L O. Liquid Heat Ex changer Interface and Method[ P] . U. S. Patent 3, 990, 862, 1976-11-09
[ 6]  Zhao X B, Zhang H J. Experimental Study of Pool Boiling Heat Transfer from Powder Porous Surface at High Heat Flux
[ C] . In Advances in Phase Change Heat Transfer, XinMingdao, ed. International Academic Publisher and Chongqing
University Press, 1988: 236~ 241
[ 7] Zhao X B, Zhang H J. Analysis and Experimentation on Boiling Heat Transfer in Thin Powder Porous Layers at High
Heat Flux[ J] . Chinese Journal of Eng ineering Thermophysics, 1990, 2( 3) : 323~ 333

Memo

Memo:
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Last Update: 2013-04-29