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連續釜式反應器的熱量衡算

來源: 時間:2012-12-01 14:42:22 瀏覽次數:

計算K0值的基準面積,習慣上常用設備的外表面積A0,當設計對象的基準條件(設備型式、雷諾準數Re、流體物性等)與某已知K值的生產設備相同或相近時,則可采用已知設備K值作為自己設計的K0值,表2—1列出K0值大致范圍。

連續釜式反應器的熱量衡算

    根據熱量衡算基本方程式可求得在等溫情況下

    (-rA)(-HA)VR=VoCpt(T-To)+K0Ah(T-Tc)             

                  Qr = Qc

        即:放熱速率=移熱速率

其中  V0—平均每秒處理的物料量m3/s;

 VR—反應器有效體積m3

    3、總傳熱系數K0的確定

    計算K0值的基準面積,習慣上常用設備的外表面積A0,當設計對象的基準條件(設備型式、雷諾準數Re、流體物性等)與某已知K值的生產設備相同或相近時,則可采用已知設備K值作為自己設計的K0值,表2—1列出K0值大致范圍。K0值也可用下式計算

 

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