effect of bubble behavior on the scale-up of fluidized bed heat exchangers
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effect of bubble behavior on the scale-up of fluidized bed heat exchangers final report by William J Thomson

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Published by Dept. of Energy, for sale by the National Technical Information Service in [Washington], Springfield, Va .
Written in English


  • Fluidized-bed furnaces,
  • Heat -- Transmission

Book details:

Edition Notes

StatementWilliam J. Thomson, Department of Chemical Engineering, University of Idaho
SeriesTID ; 27925
ContributionsUnited States. Dept. of Energy, University of Idaho. Dept. of Chemical Engineering
The Physical Object
Paginationiii, 52 p. :
Number of Pages52
ID Numbers
Open LibraryOL14884268M

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  The bubbling fluidized beds are characterized by uniform temperature, high heat transfer rate, good control of steam temperature, continuity of operation, excellent part-load behavior, and enhancement heat transfer capacity, due to the intensive mixing of bed material by the motion of gas bubbles [14,15]. In spite of their advantages, there is a lack of heat transfer data Cited by: A new modified discrete bubble model has been developed for freely bubbling fluidized beds. The influence of two various types of bubble‐bubble interaction models on the bubble behavior Cited by: Bubble properties in a fluidized bed are of high interest for reaction modeling and the prediction of the behavior in scale-up. If the size, shape, distribution and velocity of bubbles are known, the volume-specific area of the bubble phase can be predicted, which is an important factor for modeling mass-transfer : Tom Wytrwat, Mahdi Yazdanpanah, Stefan Heinrich. The effect of the bed diameter on the gas-solids flow characteristics inside a cylindrical fluidized bed is investigated numerically using a two-fluid model based on the kinetic theory of granular.

fluidized bed into which black liquor and steam are injected. The fluidized bed has four horizontal banks of 20 heaters, with each bank oriented perpendicular to each adjacent bundle. These heat up the bed, which causes the steam to react with the black liquor to form mainly carbon monoxide gas (CO) and hydrogen gas (H2). This gas is used for. Mohammad H. Tavassoli-Rizi, Salman Movahedirad, Ahad Ghaemi, Effect of Bubble Injection Pattern on the Bubble Size Distribution in a Gas-Solid Fluidized Bed, Flow, Turbulence and Combustion, /s, 98, 4, (), (). The behavior of bubbles in a cocurrent gas‐liquid‐solid fluidized bed was investigated in a column of mm ID in this study. The particles used were glass beads of .   Sorption-Enhanced Steam Methane Reforming (SE-SMR) represents a novel and energy-efficient hydrogen production route with in situ CO 2 capture. A comprehensive Eulerian-Eulerian CFD model of SE-SMR in a bubbling fluidized bed reactor, that uses dolomite and other solid sorbents as CO 2 acceptors, has been developed. Kinetic models for steam methane reforming and CO 2 capture .

A new bubble diameter correlation is derived to predict bubbling characteristics of fluidized beds of varieties of powders. The present model is founded on the postulate that the steady bubble size, which is often called the maximum stable diameter, observed in a bed of Geldart group A powder is formed as a result of an equilibrium of successive coalescence and splitting. Sharma et al.[6]performed both 2-D and 3-D simulations of a fluidized bed to examine the effects of superficial gas velocity, biomass density and particle size on mixing/segregation behavior of.   High Performance Computational Fluid- Thermal Sciences & Engineering Lab Multi-phase heat transfer with fluidized bed • Temperature control, heat addition, extraction in fluidized beds • Example – CO 2 capture and regeneration (post combustion) • Temperature control is essential for optimal operation • Capture is exothermic • Regeneration is endothermic. injection into a liquid fluid and double pipe heat exchangers are summarized chronologically as follows. Oh et al. [3] () Studied on bubble behavior and boiling heat transfer enhancement under electric field. Gabillet et al. [4] () experimentally studied on the bubble injection in a turbulent.