流動層を設けた二重管型ふく射加熱バーナの開発および装置伝熱特性の検討

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  • Development of double-tube radiant burner with fluidized bed and studies of its heat transfer characteristics.
  • リュウドウソウ オ モウケタ 2ジュウカンガタ フクシャ カネツ バーナ ノ

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A new double-tube radiant burner equipped with a fluidized bed in the outer exhaust gas tube was developed, in which the combustion gas released from the inner combustion tube was drawn off through the fluidized bed in the outer tube. The heat transfer mechanism of this burner across the burner tubes was studied and its heat transfer characteristics were investigated.<BR>It was found that not only a uniform temperature distribution along the outer tube but also heat transfer augmentation was obtained by the present burner with fluidized bed, ascompared to the conventional type without fluidized bed. It was found that a uniform temperature distribution along the outer tube was realized by the fluidized bed, owing to its uniform temperature distribution in the axial direction. It was also confirmed that the temperature distribution along the outer tube without fluidized bed was affected by the temperature distribution along the inner tube.<BR>These results showed that the fluidized bed equipped with a double-tube radiant burner contributed to the uniformity of temperature distribution along the outer tube and also to augmentation of heat transfer from the inner to the outer tube.

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