• 作者： Chyang, Chien-Song; Yang, Yu-Shu
• 中文摘要： 依據邊界層再生(renewal of boundary layer)之觀念提出床質對床壁之熱傳關係式,同時以(粒子下降速度)/(熱交換表面之垂直高度)為邊界層之再生頻率,以一45公分內徑之實驗裝置中所得之數據,印證此關係式之可行性。
• 英文摘要： In a pilot scale apparatus the bed-to-wall heat transfer coefficients were measured. Narrow size distributed river sands with average diameters of 358, 505 and 650.mu.m were used as the fluidizing particles. The operating temperatures were maintained at 560-670.degree.K, and the superficial gas velocities were 3-13 times the minimum fluidization velocities of the fluidized particles. Based on the concept of boundary layer renewal near the bed wall, an equation for estimating the bed-to-wall heat transfer coefficient was developed. A new approach was proposed to estimate the parameters used in this equation. Experimental data obtained from this work and literature were used to test this model. The results showed that the experimental data were in good agreement with the predicted values .
• 中文關鍵字： 流體化; 床對壁; 熱傳; 邊界層再生
• 英文關鍵字： Fluidization; Bed-To-Wall; Heat Transfer; Boundary Layer Renewal