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Numerical Simulation and Scale-Up Study on the Particle Distribution of Liquid-Solid Fluidized Bed Heat Exchanger

Author: ZhangJie
Tutor: ZhangShaoFeng
School: Hebei University of Technology
Course: Chemical Process Equipment
Keywords: Liquid-solid circulating fluidized bed Heat exchanger Distribution plate Unevenness Numerical Simulation
CLC: TK124
Type: Master's thesis
Year: 2010
Downloads: 63
Quote: 0
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Abstract


In this paper , on the basis of previous experimental studies , at home and abroad a large number of documents , the application of common flow field analysis software FLUENT Euler model , based on the three-dimensional NS equations and standard k ? Epsilon turbulence model , the liquid - solid circulating fluidized bed heat exchanger change the distribution of characteristics and constraints of the pore size distribution board characteristics of the simulation , the simulation results show that the use of variable pore size distribution board , in the case of smaller openings rate , can play a role of uniform distribution of analog values ??with the literature experimental values ??are in good agreement , confirming the applicability of the model and parameter setting of the experimental setup of three - dimensional flow problems . Simultaneous analysis of a the distribution board constraint characteristic , the analysis results show that the opening ratio of the better performance of the distribution plate , the particles at higher flow rates , the circulation amount increases, the constraint characteristic weakened . Numerical simulation of the enlarged liquid - solid circulating fluidized bed heat exchanger installed inside the scaled design variable pore size distribution boards, particle velocity in the case of different installation heights and different liquid inlet velocity , heat transfer tube and solid holdup distribution along the radial direction . The simulation results show that : -scaled variable pore size distribution plate can play the role of uniformly distributed .

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CLC: > Industrial Technology > Energy and Power Engineering > Thermal engineering, heat > Thermal Engineering Theory > Heat Transfer
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