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Experimental study on boiling heat transfer of R32/R290 in horizontal tubes.

Number: pap. n. 162

Author(s) : LIU F., HAN B., CAI D., et al.

Summary

In this paper, because of the high GWP of R407C and R410A which are widely used as alternatives for R22 at present, a new mixture of R32 and R290 is proposed as the alternative of R22. R32/R290 mixture with mass ratio 68/32 is a near-azeotropic refrigerant. The ODP of this mixture is zero, its GWP is much lower than R410A. The flow boiling heat transfer performance inside a single horizontal tube with different inner diameters was investigated with the mass flow rate from 100kg/(m2•s) to 250 kg/(m2•s) and the evaporation temperatures are 7°C, 9°C and 11°C, respectively. The effects of refrigerant mass flow and the evaporation temperature on the heat transfer coefficient are analyzed. The results have a certain reference value for the engineering design and optimization of R32/R290 evaporators.

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Pages: 8 p.

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Details

  • Original title: Experimental study on boiling heat transfer of R32/R290 in horizontal tubes.
  • Record ID : 30015328
  • Languages: English
  • Source: Proceedings of the 24th IIR International Congress of Refrigeration: Yokohama, Japan, August 16-22, 2015.
  • Publication date: 2015/08/16
  • DOI: http://dx.doi.org/10.18462/iir.icr.2015.0162

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