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Experimental investigation on nucleate boiling heat transfer of low GWP refrigerants over metal-foam enhanced tube bundles.

Number: 0717

Author(s) : YANG C., MUNEESHWARAN M., NAWAZ K.

Summary

The objective of this work is to establish the nucleate boiling heat transfer performance of an enhanced tube bundle. Such development has potential applications in flooded evaporators used in commercial and industrial refrigeration systems. The enhanced tube bundle was fabricated by deploying metal foam around the outer surface of aluminum tubes, which provides higher heat transfer area and nucleation site density. The pool boiling experiments for horizontal tube bundles were conducted in a pressure vessel at difference heat fluxes. The heat transfer performance of bare aluminum tube bundle was compared against the metal-foam enhanced tube bundle using low GWP refrigerant, R-1234yf. The experimental results showed that the heat transfer coefficient of the metal-foam enhanced tube bundle was at least two times higher than that of the bare tube bundle, and the enhancement ratio depended on the heat flux condition.

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Pages: 9 p.

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Details

  • Original title: Experimental investigation on nucleate boiling heat transfer of low GWP refrigerants over metal-foam enhanced tube bundles.
  • Record ID : 30031650
  • Languages: English
  • Subject: Technology, HFCs alternatives
  • 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.2023.0717

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