Heat transfer under supercritical parameters of pulse-heated liquid |
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Authors: | S. B. Ryutin P. V. Skripov |
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Affiliation: | 1. Institute of Thermal Physics, Russian Academy of Sciences, Ural Branch, Yekaterinburg, Russia
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Abstract: | A technique based on pulse heating of a wire probe (resistance thermometer) in a constant-heating power regime is developed and used for studies of comparative heat-transfer intensity in supercritical fluids (SCFs) in the pressure and temperature ranges from 1p c to 4–6p c and from 0.6T c to 1.6T c , respectively (p c and T c are critical pressure and temperature). The characteristic parameters of the setup used are as follows: heating -pulse length, 1–10 ms; density of heat flux through the probe surface, 1–10 MW/m2; and repeatability of the selected power value in a series of pulses, not worse than 0.1%. A sharp decrease in the heat-transfer intensity in SCFs compared to that observed at subcritical temperatures is revealed. |
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