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Investigations on optimal spray parameters of pressure swirl nozzle-based spray cooling in the non-boiling regime.

Number: 0046

Author(s) : KUKREJA R., SINGH S.

Summary

Spray cooling experiments have been performed with distilled water over a copper specimen of 10 mm2 to investigate the spray characteristics in the non-boiling regime. Optimal spray height was found experimentally, corresponding to the maximum heat flux, when the spray impact circle is tangent to the heated surface. The maximum heat flux of 393.36 W/cm2 and heat transfer coefficient of 5.30 W/cm2K is achieved corresponding to largest nozzle diameter. On the contrary, a smallest nozzle diameter showed highest spray cooling efficiency of 65.2%. Therefore, a counterbalance exists between heat flux and cooling efficiency to dictate an optimal volumetric flux for a particular nozzle. The effect of subcooling on heat transfer performance has also been investigated which showed a higher degree of subcooling improved heat transfer performance to 52-58% when compared low subcooling. A correlation to predict local Nusselt number has been proposed in the end.

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Pages: 12 p.

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Details

  • Original title: Investigations on optimal spray parameters of pressure swirl nozzle-based spray cooling in the non-boiling regime.
  • Record ID : 30031566
  • Languages: English
  • Subject: Technology
  • Source: Proceedings of the 26th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
  • Publication date: 2023/08/21
  • DOI: http://dx.doi.org/10.18462/iir.icr.2023.0046

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