Title

Nucleate boiling heat transfer enhancement for water and FC-72 on titanium oxide and silicon oxide surfaces

Authors

Authors

W. Wu; H. Bostanci; L. C. Chow; Y. Hong; M. Su;J. P. Kizito

Comments

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Abbreviated Journal Title

Int. J. Heat Mass Transf.

Keywords

Boiling enhancement; Titanium oxide; Silicon oxide; Hydrophilic; MECHANISM; Thermodynamics; Engineering, Mechanical; Mechanics

Abstract

An experimental study was performed to investigate the nucleate boiling and critical heat flux (CHF) of water and FC-72 dielectric liquid on hydrophilic titanium oxide (TiO(2)) nanoparticle modified Surface A 1 cm(2) copper heater with 1 mu m thick TiO(2) Coating Was utilized in saturated pool boiling tests with water and highly-wetting FC-72. and its performance was compared to that of a smooth surface Results showed that TiO(2) coated surface increased CHF by 50.4% and 38 2% for water and FC-72. respectively, and therefore indicated that boiling performance enhancement depends on the level of wettability improvement. A silicon oxide (SiO(2)) coated surface, exhibiting similar surface topology, was tested to isolate the roughness related enhancement from the overall enhancement. Data confirmed that hydrophilicity of TiO(2) coated Surface provides an additional mechanism for boiling enhancement (C) 2010 Elsevier Ltd. All rights reserved

Journal Title

International Journal of Heat and Mass Transfer

Volume

53

Issue/Number

9-10

Publication Date

1-1-2010

Document Type

Article

Language

English

First Page

1773

Last Page

1777

WOS Identifier

WOS:000275765200018

ISSN

0017-9310

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