scholarly journals Three-dimensional Numerical Simulation of Dense Gas-Solid Flow in Circulating Fluidized Bed under Rolling Motion of Ship

2010 ◽  
Vol 45 (Special) ◽  
pp. 1004-1011 ◽  
Author(s):  
Hideyuki Oka ◽  
Hiroyuk Murata ◽  
Kazuyoshi Harumi ◽  
Tomokazu Kuwayama ◽  
Kazumasa Tsuboi ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Three Dimensional ◽  
Rolling Motion ◽  
Dense Gas ◽  
Solid Flow

scholarly journals Numerical Analysis of Dense Gas-Solid Flow in Circulating Fluidized Bed under Rolling Motion of Ship

2009 ◽  
Vol 44 (3) ◽  
pp. 399-404
Author(s):  
Hideyuki OKA ◽  
Hiroyuki MURATA ◽  
Kazuyoshi HARUMI ◽  
Tomokazu KUWAYAMA ◽  
Kazumasa TSUBOI ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Rolling Motion ◽  
Dense Gas ◽  
Solid Flow

Validation and Application of Computational Modeling to Reduce Erosion in a Circulating Fluidized Bed Boiler

2012 ◽  
Vol 10 (1) ◽  
Author(s):  
Peter J. Blaser ◽  
Giorgio Corina
Keyword(s):  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Complex Geometry ◽  
Three Dimensional ◽  
Palm Kernel ◽  
Operational Experience ◽  
Solid Flow ◽  
Internal Surfaces ◽  
And Performance ◽  
Palm Kernel Shells

Abstract The 40 MW Strongoli power plant, located in the Calabria region of Italy, produces power from 100% biomass sources. The combustion of wood biomass, exhausted olive residues and palm kernel shells, occurs in a sand-filled, Circulating Fluidized Bed (CFB) combustor. Operational experience with the unit dates back to 2003. This paper describes the optimization of the boiler in order to minimize erosion on internal surfaces and structures. Detailed three-dimensional, transient, multiphase gas-solid flow fields were computed and are presented. Details of the complex geometry include the combustion chamber, cyclone, cyclone dipleg, seal pot, fluidized bed heat exchanger and cyclone outlet structures including suspension tubes. The gas-solid flow was computed using the commercially-available software package Barracuda, a CFD software based on a unique Eulerian-Lagrangian formulation that was essential to the success of the subject work. Both instantaneous and time-averaged results were obtained. Results were validated against operational erosion experience. The validated model, in turn, was utilized to redesign various components of the boiler, optimizing both erosion characteristics and performance behaviour of the system. The redesigned unit was commissioned in early 2012.

Three-Dimensional Simulation of Gas-Solid Flow in the Biomass Circulating Fluidized Bed Gasifier’s Riser

2011 ◽  
Vol 383-390 ◽  
pp. 6537-6542
Author(s):  
Wen Yi Chen ◽  
Xin Liu ◽  
Xiao Xu Fan ◽  
Lei Zhe Chu ◽  
Yi Mei Yang ◽  
...  
Keyword(s):  
Pressure Drop ◽  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Volume Fraction ◽  
Mutual Influence ◽  
Solid Volume Fraction ◽  
Three Dimensional ◽  
Momentum Exchange ◽  
Solid Flow ◽  
Radial Profiles

Using the Gidaspow model as the momentum exchange coefficient to take a full-loop simulation of miniature circulating fluidized bed gasifier (CFBG) in the lab, and taking mutual influence of different parts in consideration, it focus on the gas-solid flow structure in the riser in this paper. The heterogeneous behavior in the CFBG riser and the radial profiles of solid volume fraction under different solid inventories in simulation are showed in this paper as a replenishment of certain data which are hard to measure in experiments. The results showed it can’t form an obvious core-annulus flow because of the riser’s high height-diameter ratio and the big refeed line diameter. There are clusters growing and dissipation in a short time. A turning point of pressure drop may be seem as a separation of dense area and dilute area.The three-dimensional (3D) simulation revealed the solid flux and the pressure drop agree with the experimental data.

scholarly journals Effects of Rolling Motion on Gas-Solid Flow in Circulating Fluidized Bed

2009 ◽  
Vol 44 (1) ◽  
pp. 119-126
Author(s):  
Hiroyuki MURATA ◽  
Masaki ADACHI ◽  
Masahide TAKAGI ◽  
Shoichi Yabuki ◽  
Hideyuki OKA ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Rolling Motion ◽  
Solid Flow

scholarly journals Effects of Rolling Motion on Gas-Solid Flow in Circulating Fluidized Bed - 3rd Report

2010 ◽  
Vol 45 (6) ◽  
pp. 907-912
Author(s):  
Hiroyuki Murata ◽  
Masaki Adachi ◽  
Masahide Takagi ◽  
Fujio Inasaka ◽  
Hideyuki Oka ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Rolling Motion ◽  
Solid Flow
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