• 作者： Tsai, Shau-Wei
• 中文摘要： 本文導出通式計算具通道之反應器中之熱傳送。理論分析顯示流動型式(A)之熱傳送較一般空管之熱傳送大,且隨K/sub 1/值之增加而加大,其可由套管與通道管中流體之滯留時間與流率之競爭來說明。對於環式反應器中流動型式(B)及(C)而言,當無因次管長小時迴流之引入亦可增加熱傳送,此結果將隨 K/sub 1/,K/sub 2/或M值之增加而明顯,而於文中建議由流體之預混合與滯流時間之競爭來定性解釋流體行為。此外,本文亦導出各種流動型式下之漸近解。
• 英文摘要： General expressions for evaluating heat transfer in reactors with a draft tube have been derived. Theoretical results show that heat transfer may be enhanced for flow pattern (A) compared with that in an open duct especially when K/sub 1/ is increased. The competition of the residence time and the volumetric flow rate of the fluids in the annulus and in the draft tube may be used to explain the fluid behaviors. For flow patterns (B) and (C) as in a loop reactor, introduction of recycling can augment the heat transfer rate for small dimensionless tube length, especially when K/sub 1/, k/sub 2 / or M increases. The competition between the premixing and the residence time effects of the fluid is suggested to describe qualitatively the fluid behaviors. Moreover, asymptotic solutions for all flow patterns were also derived.
• 中文關鍵字： 熱傳遞; 內環式反應器; 熱交換器; 紊流
• 英文關鍵字： Heat Transfer; Inner Loop Reactor; Heat Exchanger; Turbulent