Study of hydrodynamic characteristics in a circulating fluidized bed gasifier for plastic waste by computational fluid dynamics modeling and simulation

2014 ◽  
Vol 16 (4) ◽  
pp. 665-676 ◽  
Author(s):  
Ji Eun Lee ◽  
Hang Seok Choi ◽  
Yong Chil Seo
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Modeling And Simulation ◽  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Plastic Waste ◽  
Hydrodynamic Characteristics ◽  
Dynamics Modeling ◽  
Computational Fluid Dynamics Modeling ◽  
Fluidized Bed Gasifier

Computational fluid dynamics of circulating fluidized bed downer: Study of modeling parameters and system hydrodynamic characteristics

2012 ◽  
Vol 189-190 ◽  
pp. 314-335 ◽  
Author(s):  
Benjapon Chalermsinsuwan ◽  
Titinan Chanchuey ◽  
Waraporn Buakhao ◽  
Dimitri Gidaspow ◽  
Pornpote Piumsomboon
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Hydrodynamic Characteristics

Evaluation of Paddle Wheels in Generating Hydroelectric Power

2012 ◽  
Author(s):  
Yucheng Liu ◽  
Yoosef Peymani
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Modeling And Simulation ◽  
Analytical Model ◽  
Relative Velocity ◽  
Hydroelectric Power ◽  
Dynamics Modeling ◽  
Efficiency Curve ◽  
Computational Fluid Dynamics Modeling ◽  
Analytical Algorithm

This paper presents an innovative analytical model to correctly evaluate the performance of a paddle wheel in generating hydroelectric power. The deficiencies of current analytical model in evaluating such performance are pointed out and overcome by the developed analytical algorithm. Important factors that affect the paddle wheel’s performance, such as the drag force, relative velocity, efficiency curve of generator, are considered in the developed method. The presented method and analytical results are validated through CFD (Computational Fluid Dynamics) modeling and simulation.

Computational Fluid Dynamics Modeling of Palm Fruit Pyrolysis in a Fast Fluidized Bed Reactor

2013 ◽  
Vol 699 ◽  
pp. 822-828
Author(s):  
P.L. Mtui
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Fluidized Bed ◽  
Volume Fraction ◽  
Pyrolysis Oil ◽  
Dynamics Modeling ◽  
Palm Fruit ◽  
Computational Fluid Dynamics Modeling ◽  
Computational Fluid Dynamics Cfd ◽  
Biomass Particles

The palm fruit biomass is introduced into the pyrolysis reactor bed and the transport equations for heat, mass and momentum transfer are solved using computational fluid dynamics (CFD) technique. The Eulerian-Eulerian approach is employed to model fluidizing behavior of the sand for an externally heated reactor prior to the introduction of the biomass. The particle motion in the reactor is computed using the drag laws which depend on the local volume fraction of each phase. Heat transfer from the fluidized bed to the biomass particles together with the pyrolysis reactions were simulated by Fluent CFD code through user-defined function (UDF). Spontaneous production of pyrolysis oil, char and non-condensable gases (NCG) confirm the observation widely reported in literature. The computer model can potentially be used to assess other candidate biomass sources also to assist design of optimized pyrolysis reactors.

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