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International Heat Transfer Conference 10

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

Rapid Transient Heat Transfer of Near-Critical Carbon Dioxide

Toshio Aihara
Institute of High Speed Mechanics, Institute of Fluid Science, Tohoku University, Katahira, Sendai 980, JAPAN

Taku Ohara
Institute of Fluid Science, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan

Jun Tamba
Institute of Fluid Science, Tohoku University, Japan

DOI: 10.1615/IHTC10.4500
pages 13-18

Abstract

Rapid transient free-convective heat-transfer characteristics from a horizontal platinum wire in supercritical carbon dioxide were studied experimentally. Time history of correlations between heat flux and superheat was shown for various stepwise heat-inputs and a comparison of the transient heat-transfer characteristics between supercritical and sub critical CO2 was made. In the case of transient heat transfer to supercritical CO2, the occurrence of a bubble-like structure was observed.

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