Share

IIR document

Experimental investigation of the effect of flow direction on heat transfer of supercritical carbon dioxide flowing in a cooled vertical tube.

Author(s) : BRUCH A., COLASSON S., BONTEMPS A.

Summary

The heat transfer coefficient of turbulent flows of supercritical carbon dioxide was experimentally investigated for vertical flows. The test section consists of two subsections connected in series and forming a U-tube. Each subsection is a 0.75 m-long vertical tube-in-tube counter-flow heat exchanger, with CO2 flowing in the inner copper tube of 6-mm diameter and cooling water flowing in the annulus. Experimental results indicate that strong differences on heat transfer coefficients appear with flow direction, indicating an influence of buoyancy forces on heat transfer process. Results are presented on a dimensionless form commonly used in the studies of mixed convection in heating but not used in studies of cooling of supercritical carbon dioxide. Based on the experimental data collected in this work, correlations have been developed for upward and downward turbulent flows, respectively. The results complete the missing data of the literature on turbulent vertical mixed convection in cooling conditions.

Available documents

Format PDF

Pages: ICR07-B1-560

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: Experimental investigation of the effect of flow direction on heat transfer of supercritical carbon dioxide flowing in a cooled vertical tube.
  • Record ID : 2007-2510
  • Languages: English
  • Source: ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
  • Publication date: 2007/08/21

Links


See other articles from the proceedings (839)
See the conference proceedings

Indexing