Title

Nucleate Boiling Heat Transfer Enhancement For Water And Fc-72 On Titanium Oxide And Silicon Oxide Surfaces

Keywords

Boiling enhancement; Hydrophilic; Silicon oxide; Titanium oxide

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 (TiO2) nanoparticle modified surface. A 1 cm2 copper heater with 1 μm thick TiO2 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 TiO2 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 (SiO2) coated surface, exhibiting similar surface topology, was tested to isolate the roughness related enhancement from the overall enhancement. Data confirmed that hydrophilicity of TiO2 coated surface provides an additional mechanism for boiling enhancement. © 2010 Elsevier Ltd. All rights reserved.

Publication Date

4-1-2010

Publication Title

International Journal of Heat and Mass Transfer

Volume

53

Issue

9-10

Number of Pages

1773-1777

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.ijheatmasstransfer.2010.01.013

Socpus ID

76749134677 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/76749134677

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