3D CFD simulation of aerodynamics of a 406 MW<sub>t</sub> CFB boiler

Кокшарев, Олег Максимович; Gil, Andrey V.; Lebedev, Vitali M.

doi:10.1051/matecconf/201711001041

Cited by 2 publications

(1 citation statement)

References 5 publications

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“…However, there are few studies focusing on the CFB combustion of burning pure biomass. In addition, a large number of mathematical models, including CFD models and dynamic simulation models (Lu et al 2013;Koksharev et al 2017), have been developed to study the overall performance of CFB boilers in the past few years. Due to the limitation of computing power, it takes a lot of time to use the CFD method to conduct transient simulations.…”

Section: Introductionmentioning

confidence: 99%

Modeling and dynamic characteristics of the dense phase region of a biomass-fired circulating fluidized bed combustion system using Modelica

Liu

Pan²,

Liu

et al. 2020

BioRes

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Using Modelica language, a mathematical model combining static and dynamic contributions of the dense phase region of a 130 t/h biomass circulating fluidized bed boiler combustion system was established on MWorks simulation platform. The mathematical model adopted modular packaging to increase the universality of the model, and it used an implicit, high-order, and multi-step Dassl integration algorithm to conduct the simulation. Under the design condition parameters, the relative error between the bed temperature of the dense phase region obtained by the simulation model and the actual temperature was less than 3.8%, which indicated that the static characteristics of the established simulation model were accurate. The effects of biomass feed and primary air volume step changes on the bed temperature, oxygen content in the flue gas, height of the dense phase region, and the bed pressure difference in the dense phase region were investigated. Both the biomass feeding and the primary wind step of 10% reduced the temperature, and it was obvious that the primary wind had a greater impact on the bed temperature. Meanwhile, the primary wind had a greater impact on the bed pressure difference than the biomass feeding.

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Section: Introductionmentioning

confidence: 99%

Modeling and dynamic characteristics of the dense phase region of a biomass-fired circulating fluidized bed combustion system using Modelica

Liu

Pan²,

Liu

et al. 2020

BioRes

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Full Loop Numerical Simulation of Fluidization Characteristics at Cyclone and Furnace of 110 MW CFB

Wirahadi

Batubara

2021

IOP Conf. Ser.: Mater. Sci. Eng.

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Circulating fluidized bed (CFB) boiler has strong points with its recognition when operating with low quality coal contrast to pulverized coal boiler. Boiler load could be improved by increasing coal input and air ratio combustion adjustment. That is why ratio combustion between secondary and primary air is one of valuable parameters influencing fluidization of CFB Boiler. CFB boiler is consist mainly of a furnace, two cyclones, and forced loop pipes, where cyclones are boiler parts that were indicated to have high velocity fluidization up to 30 m/s. Full loop 3D simulation of CFB with focusing on the furnace and cyclone by using computational fluid dynamic (CFD) program was implemented using Eulerian multiphase model to investigate sand volume of fraction, air, and sand velocity including pressure distribution around Cyclone. Several air ratio combustions between primary and secondary air were simulated such as 55%-45%, 50%-50% with 63%, and 100% load variations. It was shown that operation with air combustion ratio 50%-50% and 55%-45% leads to good fluidization at 63% load, while 100% and 110% fluidization will cause an abundant sand entered to inlet cyclone and induce higher sands and air velocity.

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3D CFD simulation of aerodynamics of a 406 MW_t CFB boiler

Cited by 2 publications

References 5 publications

Modeling and dynamic characteristics of the dense phase region of a biomass-fired circulating fluidized bed combustion system using Modelica

Modeling and dynamic characteristics of the dense phase region of a biomass-fired circulating fluidized bed combustion system using Modelica

Full Loop Numerical Simulation of Fluidization Characteristics at Cyclone and Furnace of 110 MW CFB

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3D CFD simulation of aerodynamics of a 406 MWt CFB boiler

Cited by 2 publications

References 5 publications

Modeling and dynamic characteristics of the dense phase region of a biomass-fired circulating fluidized bed combustion system using Modelica

Modeling and dynamic characteristics of the dense phase region of a biomass-fired circulating fluidized bed combustion system using Modelica

Full Loop Numerical Simulation of Fluidization Characteristics at Cyclone and Furnace of 110 MW CFB

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3D CFD simulation of aerodynamics of a 406 MW_t CFB boiler