Hydrodynamics and Heat Transfer in Shallow Fluidized Beds PDF Download
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Author: Jyh-Shing Yang
Publisher:
ISBN:
Category : Fluidization
Languages : en
Pages : 792
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Book Description
Author: Jyh-Shing Yang
Publisher:
ISBN:
Category : Fluidization
Languages : en
Pages : 792
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Book Description
Author: Sergeĭ Stepanovich Zabrodskiĭ
Publisher:
ISBN:
Category : Fluidization
Languages : en
Pages : 412
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Book Description
Author: Sergei Stepanovich Zabrodskii
Publisher:
ISBN:
Category : Fluidization
Languages : en
Pages : 0
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Book Description
Author: O. Molerus
Publisher: Springer Science & Business Media
ISBN: 9401158428
Category : Technology & Engineering
Languages : en
Pages : 205
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Book Description
This book provides a much needed and thorough treatment of the heat transfer in agitated disperse systems. It gives predictive equations for the heat transfer in moving beds, bubbling and circulating fluidized beds, pneumatic transport in vertical tubes and particulate fluidized beds. Owing to the many different modes of activation of heat transfer, the basic approach of the book is to provide experimental evidence of the relevance of particle motion to the proximity of solid surfaces for the heat transfer observed. This has been achieved by the evaluation of experiments obtained with a newly developed pulsed light method using luminous particles. Heat Transfer in Fluidized Beds will be of great use to students and researchers involved in heat transfer and thermodynamics.
Author: Musun Guo
Publisher: Ellis Horwood
ISBN:
Category : Science
Languages : en
Pages : 304
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Book Description
Outlining the basic concepts used in the analysis of fluidization problems, this text covers the development of various processes, equipment, and devices for fluidized solids. Topics examined include fluidized leaching and washing, and solids mixing and segregation.
Author: J. S. M. Botterill
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 314
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Book Description
![Hydrodynamics and Heat Transfer in a Pulsed Bubbling Fluidized Bed [microform] PDF](https://books.google.com/books/content/images/frontcover/x-1UAQAACAAJ?fife=w80-h100)
Author: Dahai Zhang
Publisher: Library and Archives Canada = Bibliothèque et Archives Canada
ISBN: 9780494019924
Category : Fluidization
Languages : en
Pages : 428
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Book Description
Author: J.R. Grace
Publisher: Springer Science & Business Media
ISBN: 9400900953
Category : Science
Languages : en
Pages : 599
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Book Description
Since the late 1970s there has been an explosion of industrial and academic interest in circulating fluidized beds. In part, the attention has arisen due to the environmental advantages associated with CFB (circulating . fluidized bed) combustion systems, the incorporation of riser reactors employing cir culating fluidized bed technology in petroleum refineries for fluid catalytic cracking and, to a lesser extent, the successes of CFB technology for calcina tion reactions and Fischer-Tropsch synthesis. In part, it was also the case that too much attention had been devoted to bubbling fluidized beds and it was time to move on to more complex and more advantageous regime,S of operation. Since 1980 a number of CFB processes have been commercialized. There have been five successful International Circulating Fluidized Bed Confer ences beginning in 1985, the most recent taking place in Beijing in May 1996. In addition, we have witnessed a host of other papers on CFB funda mentals and applications in journals and other archival publications. There have also been several review papers and books on specific CFB topics. However, there has been no comprehensive book reviewing the field and attempting to provide an overview of both fundamentals and applications. The purpose of this book is to fill this vacuum.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Shihui Zhou
Publisher:
ISBN:
Category :
Languages : en
Pages : 226
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Book Description
A new theoretical approach to the modelling of the upward flow of gas-particle suspensions is presented. In this, the proposed theory is used to predict suspension concentration, radial gas and solids velocities, axial gas and solids velocities. This thesis provides a general expression for slip velocity between gas and solids phases. The equivalence of pressure gradient with suspension concentration is demonstrated. The experimentally observed existence of core-annulus flow structure, a rapidly- rising dilute core surrounded by a slowly-falling denser annulus adjacent to the pipe walls, in vertical risers is predicted by the theory. Sodium chloride tracer impulse injection was used to measure the longitudinal solids mixing in circulating fluidized bed risers of internal diameter 0.152 and 0.305m at superficial gas velocity from 2.8 to 5.0 m/s for mean solids circulation flux from 5.0 to 80 kg/m2s. The measured solids mixing data were satisfactorily described by a simple one-dimensional dispersion model which permits residence time distribution curves to be calculated directly from a knowledge of operating conditions. The degree of longitudinal solids mixing in the riser is found to decrease with increase in riser diameter. The measurement of instantaneous local temperature fluctuation traces and mean thermal boundary layers was conducted with a special probe for various operating conditions. A mechanism, in which eddying particle cloud swarms and gas packets are pictured as the receptors of heat, and relatively steady conduction of heat and unsteady random transport of heat play the principal roles in the wall-to-suspension heat transfer, is proposed and is analyzed mathematically. Overall heat transfer coefficients were measured on 0.180 m long heat transfer section in two scale cold model circulating fluidized bed risers at several temperature differences for ... powder at superfical gas velocity from 1.96 to 5.66 m/s, and for solids circulation fluxes up to 118.54 kg/m2s. Average heat transfer coefficients increase with suspension concentration which ranged from 0 to 86.09 kg/m3, and decrease with heat transfer temperature difference, Tw - Tb, which ranged from 12 to 121.5 degrees C Heat transfer coefficients are found to increase with riser diameter.
