ファインバブルが冷却性能に及ぼす影響

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  • Influence of Fine Bubbles on Cooling Performance

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<p>This study experimentally investigated the cooling performance of fine bubbles using a recirculating pipeline system. Purified water was passed through a fine-bubble generator; the test fluids used in this study contained 2 × 108 bubbles with an average bubble size of ~100 nm in 1 mL. Experiments were conducted under turbulent flow conditions, and the temperature change of the circular pipe was measured by flowing the test fluid at 20 ℃ through the circular pipe heated to 80 ℃. It was found that the addition of fine bubbles reduced the cooling rate by up to 66%. Furthermore, the improvement rate of the cooling performance was found to depend on the flow rate. Moreover, the improvement rate increased as the flow rate decreased.</p>

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