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Flow boiling of R1234yf in a uniform smooth vertical minichannel.

Number: pap. n. TP-053

Author(s) : ANWAR Z., PALM B. E., KHODABANDEH R.

Summary

This study describes experimental findings on flow-boiling heat transfer with R1234yf in a smooth, vertical stainless steel tube of 1.6 mm inner diameter and 245 mm heated length. Tests were conducted at two saturation pressures corresponding to saturation temperatures of 27 and 32°C. Other operating parameters were: mass flux 100-500 kg/m2s with heat flux 3-65 kW/m2 while quality change was up to 60%. The heat transfer coefficient appeared to be a strong function of the applied heat flux and insignificant effect of mass flux and quality was observed. Increase in saturation temperature/pressure increased the heat transfer performance. Experiments were repeated with R134a in the same test section to compare the two fluids, almost similar results were duplicated with R134a. Experimental results were compared with different correlations, Tran et al. (1996), Gungor and Winterton (1986) and Martín-Callizo et al. (2007) correlations accurately predicted the data.

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Pages: 11 p.

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Details

  • Original title: Flow boiling of R1234yf in a uniform smooth vertical minichannel.
  • Record ID : 30008278
  • Languages: English
  • Source: 4th IIR Conference on Thermophysical Properties and Transfer Processes of Refrigerants
  • Publication date: 2013/06/17

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