Heat Transfer from Supercritical Carbon Dioxide in Tube Flow: A Critical Review

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Since the discovery that CFCs and HCFCs destroy the ozone layer and cause global warming, the need to regulate their use has been critical. In the ensuing search for new environmentally benign refrigerants, carbon dioxide has been considered due to its excellent thermophysical properties. This paper gives a review of the heat transfer and pressure drop characteristics of supercritical carbon dioxide in tube flow. This information is necessary for designing the gas cooler of a carbon dioxide refrigeration system. A comparison of the different heat transfer correlations applicable to cooling of supercritical carbon dioxide has also been made.