Critical Heat Flux Improvement by Controlling Honeycomb Structure of Electrodeposited Porous Plate in a Saturated Pool Boiling of Water

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  • 電解析出多孔質体のハニカム構造制御によるプール沸騰限界熱流束の向上

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<p>Recently, the use of boiling cooling has been considered for emergency cooling in nuclear power plants and for cooling of large power devices. We fabricated electrodeposited porous plates with micro-scale honeycomb porous structure and improved the critical heat flux by using them. The structures of the porous plates were modified significantly by changing the electrodeposition conditions. The experimental results showed that the difference in the porous structure greatly affected to the critical heat flux. As for the relationship between the existence ratio of macro-channels and the critical heat flux, the critical heat flux was higher when there were few macro-channels than when the percentage of macro-channels were very high. It is thought that this tendency was obtained due to the role of porous part in retaining the liquid in boiling. In addition, the critical heat flux improved as the Wickability was increased. Therefore, the wicking performance of the porous plates is considered to have greatly improved the critical heat flux.</p>

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