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Heat transfer and pressure drop of R1123/R32 flow in horizontal microfin tubes during condensation and evaporation.

Number: pap. 2164

Author(s) : KONDOU C., KOYAMA S.

Summary

In this study, the heat transfer coefficient (HTC) and pressure drop of the new low global warming potential refrigerant mixture R1123/R32 (40/60 mass%) in a 6.0 mm OD horizontal microfin tube during condensation at 40 °C and evaporation at 10 °C are experimentally quantified. The data are then compared to the component R32. Both the condensation HTC and pressure drop of R1123/R32 (40/60 mass%) are somewhat lower than those of R32. Similarly, the pressure drop of R1123/R32 during the evaporation process at 10 °C is somewhat lower than that of R32. However, the evaporation HTC is comparable to that of R32. The lower surface tension of R1123/R32 can enhance the nucleate boiling and compensate the heat transfer degradation based on the difference in volatility.

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Pages: 8

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Details

  • Original title: Heat transfer and pressure drop of R1123/R32 flow in horizontal microfin tubes during condensation and evaporation.
  • Record ID : 30024431
  • Languages: English
  • Source: 2018 Purdue Conferences. 17th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2018/07/09

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