Modelling of heat transfer in a packed bed column
نویسندگان
چکیده
منابع مشابه
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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A comprehensive approach for modelling dependent radiative heat transfer in beds of large (geometric range) spherical particles is presented. Such a system of large spheres lies in the dependent range even for large porosities. We show that the dependent properties for a bed of opaque spheres can be obtained from their independent properties by scaling the optical thickness while leaving the al...
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Two modelling approaches of transient heat transfer by free convection in a packed bed of spheres are carried out and then, compared with experimental results. The first approach uses computational fluid dynamics software which directly solves the NavierStokes equations and the local energy equations in the fluid and solid phases. It also includes radiation between the solid surfaces. The secon...
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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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Carbon dioxide capture is a key issue in climate change mitigation. For decades the removal of carbon dioxide has been an essential step in many industrial processing operations such as the synthesis of ammonia, natural gas purification, and oil refining. In this study, a rotating packed bed has been designed for absorption of carbon dioxide from an air stream. The rotating packed bed is a comp...
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ژورنال
عنوان ژورنال: PJCT
سال: 2011
ISSN: 1899-4741,1509-8117
DOI: 10.2478/v10026-011-0046-1