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TECHNICAL PAPERS: Evaporation, Boiling, and Condensation

The Effect of Dissolving Salts in Water Sprays Used for Quenching a Hot Surface: Part 2—Spray Cooling

[+] Author and Article Information
Qiang Cui, Sanjeev Chandra, Susan McCahan

Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Ontario M5S 3G8, Canada

J. Heat Transfer 125(2), 333-338 (Mar 21, 2003) (6 pages) doi:10.1115/1.1532011 History: Received February 27, 2002; Revised October 07, 2002; Online March 21, 2003
Copyright © 2003 by ASME
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References

Qiao,  Y. M., and Chandra,  S., 1998, “Spray Cooling Enhancement by Addition of a Surfactant,” ASME J. Heat Transfer, 120, pp. 92–98.
Jia, W., and Qiu, H. H., 2001, “Experimental Investigation of Droplet Dynamics and Heat Transfer in Spray Cooling,” Proceedings of the 35th National Heat Transfer Conference, Paper NHTC2001-20109.
Cui,  Q., Chandra,  S., and McCahan,  S., 2001, “The Effect of Dissolving Gases or Solids in Water Droplets Boiling on a Hot Surface,” ASME J. Heat Transfer, 123, pp. 719–728.
Cui, Q., Chandra, S., and McCahan, S., 2002, “The Effect of Dissolving Salts in Water Sprays Used for Quenching a Hot Surface. Part 1: Boiling of Single Droplets,” ASME J. Heat Transfer, submitted.
Cui, Q., 2001, “The Effect of Dissolving Salts or Gases in Water Sprayed on a Hot Surface,” Ph.D. thesis, University of Toronto, Toronto, ON, Canada.
Ghodbane,  M., and Holman,  J. P., 1991, “Experimental Study of Spray Cooling With Freon-113,” Int. J. Heat Mass Transf., 34, pp. 1163–1174.
Qiao, Y. M., 1996, “Effect of Gravity and Surfactant on Spray Cooling of Hot Surfaces,” Ph.D. thesis, University of Toronto, Toronto, ON, Canada.
Zaytsev, I. D., and Aseyev, G. G., 1992, Properties of Aqueous Solutions of Electrolytes, CRC Press, Boca Raton, FL.
Mudawar,  I., and Valentine,  W. S., 1989, “Determination of the Local Quench Curve for Spray Cooled Metallic Surfaces,” Journal of Heat Treating, 7, pp. 107–121.
Yao,  S. C., and Choi,  K. J., 1987, “Heat Transfer Experiments of Mono-Dispersed Vertically Impacting Sprays,” Int. J. Multiphase Flow, 13(5), pp. 639–648.
Beck,  J. V., Litkouhi,  B., and St. Clair,  C. R., 1982, “Efficient Sequential Solution of the Nonlinear Heat Conduction Problem,” Numer. Heat Transfer, 5, pp. 275–286.
Pais,  M. R., Chow,  L. C., and Mahekey,  E. T., 1992, “Surface Roughness and Its Effects on the Heat Transfer Mechanism in Spray Cooling,” ASME J. Heat Transfer, 114, pp. 211–219.

Figures

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Schematic diagram of experimental apparatus for spray cooling
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Transient temperature measurements during spray cooling using pure water with mass flux ml=0.5 kg/m2s and mean droplet velocity Um=20 m/s
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Calculated surface heat flux and temperature obtained from interior temperature measurements during spray cooling using pure water with mass flux ml=0.5 kg/m2s and mean droplet velocity Um=20 m/s
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The effect of dissolved salts on heat transfer during spray cooling with 0.06 mol/l concentration salt solutions. Spray mass flux ml=0.5 kg/m2s and mean droplet velocity Um=20 m/s.
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The effect of dissolved salts on heat transfer during spray cooling with 0.06 mol/l concentration salt solutions. Spray mass flux ml=3.0 kg/m2s and mean droplet velocity Um=20 m/s.
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The effect of dissolving 0.06 mol/l of MgSO4 in water used for spray cooling at three different droplet velocities: 17 m/s, 20 m/s, and 23 m/s. Spray mass flux ml=3.0 kg/m2s.
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The effect of varying salt concentration on heat flux during spray cooling with MgSO4 solution. Spray mass flux ml=3.0 kg/m2s and mean droplet velocity Um=20 m/s.
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The effect of dissolved salt concentration on critical heat flux during spray cooling with MgSO4 solution. Spray mass flux ml=3.0 kg/m2s and mean droplet velocity Um=20 m/s.
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The effect of salt concentration on surface temperature variation during spray cooling with MgSO4 solution. Spray mass flux ml=3.0 kg/m2s and mean droplet velocity Um=20 m/s.

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