On the Mechanism of Heat Transfer in Packed Bed

نویسندگان
چکیده

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Heat Transfer in a Column Packed With Spheres

The purpose of the study is to investigate average and local surface heat transfer coefficients in a cylinder packed with spheres. Here the term «local» applies to a single sphere within the bed. Averages are derived from the sixteen different spheres that were instrumented and distributed throughout the bed. The experimental technique consisted of introducing a step - wise change in the temper...

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The novel high-fidelity CFD model for packed bed reactors is validated in terms of Nu regarding particle-to-fluid heat transfer. The model is developed to take into consideration the flow of heat, mass and momentum through and around the particles each shaped without geometrical simplification. In the present approach, cylindrical shaped solid geometries are used to bridge particles in or near ...

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The Statistical Character of Packed-bed Heat Transport Properties

Packed beds are essentially heterogeneous on a pellet scale. For random packed beds this heterogeneity causes a statistical character both on a pellet and bed scale. We discuss experimental results which deal with bed-scale statistics. For packed beds on a laboratory scale, the results indicate that the beclscale statistical behaviour introduces a spread up to a factor of three in correlations ...

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ژورنال

عنوان ژورنال: Chemical engineering

سال: 1964

ISSN: 0375-9253

DOI: 10.1252/kakoronbunshu1953.28.350