Journal
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
Volume 25, Issue 7, Pages 887-895Publisher
ELSEVIER SCI LTD
DOI: 10.1016/S0140-7007(01)00098-6
Keywords
refrigerating circuit; CO2; transcritical cycle; gas; cooling; turbulent flow; heat transfer coefficient; modelling
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The Nusselt number variations of supercritical carbon dioxide during in-tube cooling are presented and discussed. Using data presented in this paper as well as prior publications, a new correlation to predict the heat transfer coefficient of supercritical carbon dioxide during in-tube cooling has been developed. The new correlation is presented in this paper. It is based on mean Nusselt numbers that are calculated using the thermophysical properties at the wall and the bulk temperatures, respectively. It is seen that the majority of the numerical and experimental values are within +/-20% of the values predicted by the new correlation. (C) 2002 Elsevier Science Ltd and IIR. All rights reserved.
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