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Condensation heat transfer of hydrocarbons inside a compact horizontal microfin tube.

Number: 0708

Author(s) : LONGO G. A., MANCIN S., RIGHETTI G., ZILIO C.

Summary

Several HydroCarbons (HCs) have been applied as refrigerants since the beginning of refrigeration, due to their good thermodynamic and thermophysical properties and their favorable heat transfer performance. However, their high flammability limited their use to applications that require a reduced refrigerant charge. In the last decades, HC refrigerants attracted a new interest, first as substitutes for CFC and HCFC refrigerants subjected to phase-out for their large Ozone Depleting Potential and, more recently, as alternatives for HFC refrigerants with large Global Warming Potential. Nevertheless, the open literature collects just a few experimental data on HCs two-phase heat transfer and pressure drop inside small diameter tubes (ID<6 mm), most of them are quite recent. This paper presents some new experimental data collected during propylene condensation inside a 4.2 mm ID horizontal copper microfin tube. Tests were carried out at 30 °C of saturation temperature, and refrigerant mass flux in the range 75–400 kg m−2 s−1 at increasing vapor quality. The effect refrigerant mass flux and average vapor quality are evaluated separately. Finally, the experimental data were then used to assess some classical literature correlations.

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Pages: 10 p.

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Details

  • Original title: Condensation heat transfer of hydrocarbons inside a compact horizontal microfin tube.
  • Record ID : 30031647
  • 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.2023.0708

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