Analysis of the processes in fluidized bed boiler furnaces during load changes

Marko Huttunen; Juho Peltola; Sirpa Kallio; Lassi Karvonen; Timo Niemi; Ville Ylä-Outinen

doi:10.1016/j.egypro.2017.07.175

Analysis of the processes in fluidized bed boiler furnaces during load changes

Marko Huttunen
, Juho Peltola
, Sirpa Kallio
, Lassi Karvonen
, Timo Niemi
, Ville Ylä-Outinen

Valmet Oyj
VTT (former employee or external)

Research output: Contribution to journal › Article › Scientific › peer-review

16 Citations (Scopus)

Abstract

Due to increased share of intermittent renewable energy production, flexibility demands for boiler based energy production have increased in the form of required faster ramp rates and lower allowed minimum loads. To illustrate the effects of changes in boiler load, the present paper focuses on analysis of furnace processes in bubbling fluidized bed (BFB) and circulating fluidized bed (CFB) combustion during a load change. Computational fluid dynamic (CFD) modeling is used as the analysis tool. The paper illustrates by means of simulations what changes take place in the temperature and composition distributions. The effects on emissions are also analyzed in the case of the BFB boiler. The differences between CFB and BFB furnaces in their capability to respond to load change demands are discussed.

Original language	English
Pages (from-to)	580-587
Journal	Energy Procedia
Volume	120
DOIs	https://doi.org/10.1016/j.egypro.2017.07.175
Publication status	Published - 2017
MoE publication type	A1 Journal article-refereed

Funding

This work was done in the Flexible Energy System (FLEXe) program partly funded by Tekes – the Finnish Funding Agency for Innovation.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

CFD modeling
dynamic
CFB
BFB
combustion

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10.1016/j.egypro.2017.07.175Licence: CC BY-NC-ND

Cite this

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title = "Analysis of the processes in fluidized bed boiler furnaces during load changes",

abstract = "Due to increased share of intermittent renewable energy production, flexibility demands for boiler based energy production have increased in the form of required faster ramp rates and lower allowed minimum loads. To illustrate the effects of changes in boiler load, the present paper focuses on analysis of furnace processes in bubbling fluidized bed (BFB) and circulating fluidized bed (CFB) combustion during a load change. Computational fluid dynamic (CFD) modeling is used as the analysis tool. The paper illustrates by means of simulations what changes take place in the temperature and composition distributions. The effects on emissions are also analyzed in the case of the BFB boiler. The differences between CFB and BFB furnaces in their capability to respond to load change demands are discussed.",

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year = "2017",

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T1 - Analysis of the processes in fluidized bed boiler furnaces during load changes

AU - Huttunen, Marko

AU - Peltola, Juho

AU - Kallio, Sirpa

AU - Karvonen, Lassi

AU - Niemi, Timo

AU - Ylä-Outinen, Ville

PY - 2017

Y1 - 2017

N2 - Due to increased share of intermittent renewable energy production, flexibility demands for boiler based energy production have increased in the form of required faster ramp rates and lower allowed minimum loads. To illustrate the effects of changes in boiler load, the present paper focuses on analysis of furnace processes in bubbling fluidized bed (BFB) and circulating fluidized bed (CFB) combustion during a load change. Computational fluid dynamic (CFD) modeling is used as the analysis tool. The paper illustrates by means of simulations what changes take place in the temperature and composition distributions. The effects on emissions are also analyzed in the case of the BFB boiler. The differences between CFB and BFB furnaces in their capability to respond to load change demands are discussed.

AB - Due to increased share of intermittent renewable energy production, flexibility demands for boiler based energy production have increased in the form of required faster ramp rates and lower allowed minimum loads. To illustrate the effects of changes in boiler load, the present paper focuses on analysis of furnace processes in bubbling fluidized bed (BFB) and circulating fluidized bed (CFB) combustion during a load change. Computational fluid dynamic (CFD) modeling is used as the analysis tool. The paper illustrates by means of simulations what changes take place in the temperature and composition distributions. The effects on emissions are also analyzed in the case of the BFB boiler. The differences between CFB and BFB furnaces in their capability to respond to load change demands are discussed.

KW - CFD modeling

KW - dynamic

KW - CFB

KW - BFB

KW - combustion

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U2 - 10.1016/j.egypro.2017.07.175

DO - 10.1016/j.egypro.2017.07.175

M3 - Article

SN - 1876-6102

VL - 120

SP - 580

EP - 587

JO - Energy Procedia

JF - Energy Procedia

ER -

Analysis of the processes in fluidized bed boiler furnaces during load changes

Abstract

Funding

UN SDGs

Keywords

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