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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

NUMERICAL INVESTIGATION ON CONVECTIVE HEAT TRANSFER OF SUPERCRITICAL PRESSURE CO2 IN SERPENTINE CHANNEL

Get access (open in a dialog) DOI: 10.1615/IHTC16.her.023714
pages 4851-4858

Abstract

In the present work, the convective heat transfer of supercritical pressure carbon dioxide (S-CO2) near the pseudo-critical point in the horizontal serpentine channel was numerically investigated using shear-stress transport model. The effects of mass flow rate, heat flux, inner diameter and curvature diameter were investigated and the De/Gr* was proposed to represent the relative proportion of centrifugal force and buoyancy force. The results showed that the properties of S-CO2 could decrease the entransy dissipation rate in the liquid- like region, which could be explained with the entransy dissipation principle well. The entransy dissipation rate could be reduced by decreasing the heat flux or increasing the mass flow rate. When the fluid temperature is lower than the pseudo-critical temperature, the buoyancy force could be enhanced effectively by reducing the mass flow rate or increasing the inner diameter, and the relative proportion of centrifugal force and buoyancy force could be improved by increasing the mass flow rate, increasing the heat flux, decreasing the inner diameter and decreasing the curvature diameter.