Title

Optimal spray characteristics in water spray cooling

Authors

Authors

R. H. Chen; L. C. Chow;J. E. Navedo

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

Int. J. Heat Mass Transf.

Keywords

boiling; critical heat flux; droplet; efficiency; scaling; spray; Thermodynamics; Engineering, Mechanical; Mechanics

Abstract

The dependence of the efficiency of liquid usage (eta) at CHF on spray parameters was experimentally investigated for subcooled water spray cooling. A spray can be characterized by three independent parameters (droplet Sauter-mean diameter, d(32), droplet velocity, V, and droplet flux, N). In this study, each of these parameters was varied with the other two kept constant by using a combination of spray nozzles, operating pressures, and distance between the nozzle exit and the heater surface. It was found that eta varies with N-2/3, d(32)(-14/5) and V-1/4, respectively, when two of the three spray parameters are kept nearly constant. It was also found that CHF varies with N-1/16 and V-1/4 and is relatively independent of d(32). It is concluded that to achieve the maximum possible CHF while using the minimum quantity of water, it is desirable to select nozzles that produce as small a droplet diameter with as high a velocity as possible. (C) 2004 Elsevier Ltd. All rights reserved.

Journal Title

International Journal of Heat and Mass Transfer

Volume

47

Issue/Number

23

Publication Date

1-1-2004

Document Type

Article

Language

English

First Page

5095

Last Page

5099

WOS Identifier

WOS:000224450100013

ISSN

0017-9310

Share

COinS