Heat transfer to submerged surfaces in coarse-grained pressurized fluidized beds and fixed beds

1989 ◽  
Vol 12 (1) ◽  
pp. 38-44 ◽  
Author(s):  
Jürgen Schweinzer ◽  
Otto Molerus
Keyword(s):  
Heat Transfer ◽  
Fluidized Beds ◽  
Coarse Grained ◽  
Fixed Beds

scholarly journals Heat transfer in fluidized and fixed beds of adsorption chillers

2019 ◽  
Vol 128 ◽  
pp. 01003 ◽  
Author(s):  
Jaroslaw Krzywanski ◽  
Karolina Grabowska ◽  
Marcin Sosnowski ◽  
Anna Zylka ◽  
Anna Kulakowska ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Fluidized Bed ◽  
Fluidized Beds ◽  
Fixed Bed ◽  
Wall Heat Transfer ◽  
Transfer Coefficients ◽  
Heat Transfer Coefficients ◽  
Innovative Idea ◽  
Fixed Beds

An innovative idea, shown in the paper constitutes in the use of the fluidized bed of sorbent, instead of the conventional, fixed-bed, commonly used in the adsorption chillers. Bed–to–wall heat transfer coefficients for fixed and fluidized beds of adsorbent are determined. Sorbent particles diameters and velocities of fluidizing gas are discussed in the study. The calculations confirmed, that the bed–to–wall heat transfer coefficient in the fluidized bed of adsorbent is muchhigher than that in a conventional bed.

scholarly journals Experimental analysis and computational fluid dynamics simulations for heat transfer in sound assisted fluidized bed of fine powders

2017 ◽  
Vol 21 (5) ◽  
pp. 1953-1963 ◽  
Author(s):  
Uday Wankhede ◽  
Ram Sonolikar
Keyword(s):  
Heat Transfer ◽  
Fluidized Bed ◽  
Experimental Analysis ◽  
Fluidized Beds ◽  
Research Work ◽  
Flow Characteristics ◽  
Acoustic Energy ◽  
Coarse Grained ◽  
Fine Powders ◽  
Dynamics Simulations

Fine powders in the size range of 20-200 ?m are widely used in industries for fluid bed operations and are ideal for gas-solid reactions because of their large external surface areas and favorable heat transfer rates. The fine powders have very poor flow characteristics. Most of the earlier research work in heat transfer in bubbling fluidized beds is focused on coarse grained Geldart B and D particles. Acoustic energy of sufficient intensity and sound pressure level improved the quality of fluidization of fine powders. The objective of this investigation is experimental analysis and CFD simulations for heat transfer in a fluidized bed of fine powders at different acoustic conditions. The Eulerian approach has been identified as an efficient method for the numerical simulation of fluidized beds. The experimental and CFD results are in good agreement with each other.

Wall-to-bed heat transfer in gas-solid bubbling fluidized beds

AIChE Journal ◽  
2005 ◽  
Vol 52 (1) ◽  
pp. 58-74 ◽  
Author(s):  
D. J. Patil ◽  
J. Smit ◽  
M. van Sint Annaland ◽  
J. A. M. Kuipers
Keyword(s):  
Heat Transfer ◽  
Fluidized Beds
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