Heat transfer in packed-tube reactors.

被引：0

作者：

Peters, Patrick E. ^{[1
]}

Schifino, Rinaldo S. ^{[1
]}

Harriott, Peter ^{[1
]}

机构：

[1] Cornell University, United States

来源：

Industrial and Engineering Chemistry Research | 1988年 / 27卷 / 02期

关键词：

Chemical Equipment--Reactors - Mass Transfer - Mathematical Models - Thermal Conductivity;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Radial heat transfer was investigated for three tubes packed with alumina spheres, cylinders, or rings. Overall heat-transfer coefficients, determined from the average gas temperature for different packed heights, were used with expressions for the effective thermal conductivity to calculate wall-film heat-transfer coefficients. The Nusselt number for the wall film increased with Dp/Dt as well as with the particle Reynolds number, but the effective thermal conductivity decreased with Dp/Dt for a given Reynolds number. These trends led to a fairly broad maximum in the curve of overall coefficient versus Dp/Dt, with the maximum shifting to lower values of Dp/Dt at higher flow rates. For the same size packing, the overall coefficients for the different shapes were nearly the same over a 10-fold range of flow rates.

引用

页码：226 / 233

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