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

    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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