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Heat transfer and pressure drop of R744 (CO2) in extruded aluminium multi-port profiles during supercritical cooling.

Wärmeübertragung und Druckabfall von R744 (CO2) in extrudierten Aluminium-Multiport-Profilen bei Überkritischer Abkühlung.

Author(s) : HAFNER A., MUNKEJORD S. T.

Summary

A test installation and conventional correlations were used to calculate what heat transfer coefficients could be obtained using CO2 at high pressures and small diameters at temperatures under the pseudo-critical range. Above this range the coefficient was as high as 100% over the calculated valves. Ordinary correlations gave satisfactory pressure-drop valves.

Details

Original title: Wärmeübertragung und Druckabfall von R744 (CO2) in extrudierten Aluminium-Multiport-Profilen bei Überkritischer Abkühlung.
Record ID : 2000-0089
Languages: German
Source: DKV-Tagungsbericht 25. 1998, Würzburg.
Publication date: 1998/11/18
Document available for consultation in the library of the IIR headquarters only.

Links

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Indexing

Themes: Heat transfer;
CO2
Keywords: Supercritical state; Heat transfer coefficient; Geometry; Measurement; Heat transfer; Aluminium; Refrigerant; Heat exchanger; CO2; Pressure drop