Abstract
A sub-channels-inserted porous evaporator is proposed as a heat removal device of a power device with a heat load exceeding 10MW/m^2. The porous media are made by sintering metal particles with micro scale in pore and have several sub-channels to enhance discharge of generated vapor outside the porous medium. This porous cooling devise is attached onto the back surface of a high heat loading equipment such as an divertor. In order to prove the effect of the sub-channels, the heat transfer characteristics of this porous device are evaluated experimentally using a plasma arcjet as a high heat flux source. The result shows that the heat transfer performance of copper-particles-sintered porous medium with the sub-channels enables to remove much higher heat flux under lower flow rate and lower wall superheat conditions, compared with the normal porous media. The removal heat flux, 8.1MW//m^2, is 1.8 times as higher than that of the normal porous medium at a wall superheat of 50 degrees. The removal heat flux reaches almost 10MW/m^2 although the wall superheat exceeds 100 degrees (The wall temperature is around 220 degrees C. in a fully developed boiling regime).
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