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IIR document

Effect of porous bodies thickness on evaporation heat transfer by falling film on horizontal tube.

Number: 0692

Author(s) : FUKUDA S., MIYATA K., UMEZAWA S.

Summary

Falling film-type evaporators are expected to be an alternative to flooded-type evaporators to reduce the amount of refrigerant charging needed. The required conditions for falling film-type evaporators are a wet evaporator surface and higher heat transfer through liquid film.
In this study, the falling film heat transfer characteristics of R1233zd(E) on two horizontally installed porous body tubes of different thicknesses were experimentally investigated. There are three thicknesses, 0.5 mm, 1.0 mm and 2.0 mm. The horizontal tubes were 19.05 mm in diameter and 400 mm in heat transfer length. The experiment covered heat fluxes from 3 to 40 kW m–2 with several different amounts of liquid flowing down. The heat transfer coefficient of a tube with 1 mm porous bodies thickness was the highest. Thus, the porous bodies had an appropriate thickness.

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Pages: 7 p.

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Details

  • Original title: Effect of porous bodies thickness on evaporation heat transfer by falling film on horizontal tube.
  • Record ID : 30031644
  • 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.2023.0692

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