Characteristics of Heat Transfer around a Horizontal Fine Wire in a Circulating Fluidized Bed.

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  • 循環流動層内水平細線周りの熱伝達特性　　細線径／平均粒子径の相対的大きさと平均熱伝達率
  • ジュンカン リュウドウソウ ナイ スイヘイサイセン マワリ ノ ネツ デンタツ トクセイ サイセンケイ ヘイキン リュウシケイ ノ ソウタイテキ オオキサ ト ヘイキン ネツ デンタツリツ

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Abstract

Experimental study on the heat transfer mechanism from a horizontal fine platinum wire to particles was carried out in a riser of a circulating fluidized bed(CFB). As an experimental apparatus, the riser duct consisted of 33.7mm squared cross sectional area and 1620mm in a height. The test section was installed at the suitable height (0.9 m) from a distributor. Both the particle diameters (dp) and the wire diameters (dw) were 100, 200 and 400 μm. As the results, it was found the significant relationship between the particle behavior and the characteristics of heat transfer around a horizontal fine wire in CFB was found. It was found out that the heat transfer coefficient for the case of dp<dw was larger than that for the case of dp>dw in the turbulent fluidization region. It was also found that there were some relationships between the gas velocity and the characteristics of the heat transfer around a horizontal fine wire in the dilute fluidization region.

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