Share

IIR document

Boiling heat transfer and pressure drop of R134a and R1234yf in minichannels for low mass fluxes.

Author(s) : MORTADA S., ZOUGHAIB A., ARZANO-DAURELLE C., et al.

Type of article: Article, IJR article

Summary

Analysis of various existing correlations of predicting local heat transfer and pressure drop in minichannels is performed. Heat transfer coefficient is compared to experimental results. Tests are conducted in a 6-channel tube. Channels are rectangular with 1.1 mm hydraulic diameter. Test parameters were varied in the following ranges: mass flux G = 20–100 kg/m2.s, heat flux q” = 2–15 kW/m2, and vapor quality 0–1. Two working fluids are used: R134a and R1234yf. Contrary to previous studies, in this study convective boiling was identified as the dominant boiling regime. The effect of the critical heat flux on the heat transfer coefficient for low mass flux is also studied. The realized tests are compared to several correlations. Four different intervals of mass and heat fluxes are detected. A correlation of the heat transfer coefficient is proposed for these different intervals.

Available documents

Format PDF

Pages: 962-973

Available

  • Public price

    20 €

  • Member price*

    Free

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details

  • Original title: Boiling heat transfer and pressure drop of R134a and R1234yf in minichannels for low mass fluxes.
  • Record ID : 30004111
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 35 - n. 4
  • Publication date: 2012/06

Links


See other articles in this issue (45)
See the source

Indexing