Operational limits of ignition front propagation against air flow in packed beds of different wood fuels

Mika Horttanainen (Corresponding Author), Jaakko Saastamoinen, Pertti Sarkomaa

Research output: Contribution to journalArticleScientificpeer-review

45 Citations (Scopus)

Abstract

Propagation of the ignition front against airflow in packed beds of different wood fuels has been studied. The results of experiments carried out with pellets and mixtures of wood chips and sawdust are presented and compared with earlier experiments with different wood fuels. Increase in particle density and size was found out to widen the range of possible airflow rates, and transfer the maximum rate of ignition front propagation toward fuel lean conditions. Increase in the average sphericity of particles decreases the porosity of the bed. Mixing of small and large particles seems to be advantageous for combustion so that small particles change the optimum airflow rate to fuel rich conditions and large particles widen the usable range of airflow rates. A correlation was found for the maximum rate of ignition front propagation in beds of wood fuels.
Original languageEnglish
Pages (from-to)676-686
JournalEnergy & Fuels
Volume16
Issue number3
DOIs
Publication statusPublished - 2002
MoE publication typeA1 Journal article-refereed

Fingerprint

Wood fuels
Packed beds
Ignition
Air
Sawdust
Wood
Porosity
Experiments

Keywords

  • biomass
  • biofuels
  • wood fuels
  • combustion
  • ignition
  • air flow
  • wood chips
  • sawdust
  • particles
  • packed beds
  • models
  • emissions

Cite this

Horttanainen, Mika ; Saastamoinen, Jaakko ; Sarkomaa, Pertti. / Operational limits of ignition front propagation against air flow in packed beds of different wood fuels. In: Energy & Fuels. 2002 ; Vol. 16, No. 3. pp. 676-686.
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abstract = "Propagation of the ignition front against airflow in packed beds of different wood fuels has been studied. The results of experiments carried out with pellets and mixtures of wood chips and sawdust are presented and compared with earlier experiments with different wood fuels. Increase in particle density and size was found out to widen the range of possible airflow rates, and transfer the maximum rate of ignition front propagation toward fuel lean conditions. Increase in the average sphericity of particles decreases the porosity of the bed. Mixing of small and large particles seems to be advantageous for combustion so that small particles change the optimum airflow rate to fuel rich conditions and large particles widen the usable range of airflow rates. A correlation was found for the maximum rate of ignition front propagation in beds of wood fuels.",
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author = "Mika Horttanainen and Jaakko Saastamoinen and Pertti Sarkomaa",
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Operational limits of ignition front propagation against air flow in packed beds of different wood fuels. / Horttanainen, Mika (Corresponding Author); Saastamoinen, Jaakko; Sarkomaa, Pertti.

In: Energy & Fuels, Vol. 16, No. 3, 2002, p. 676-686.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Operational limits of ignition front propagation against air flow in packed beds of different wood fuels

AU - Horttanainen, Mika

AU - Saastamoinen, Jaakko

AU - Sarkomaa, Pertti

N1 - Project code: N1SU00280

PY - 2002

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N2 - Propagation of the ignition front against airflow in packed beds of different wood fuels has been studied. The results of experiments carried out with pellets and mixtures of wood chips and sawdust are presented and compared with earlier experiments with different wood fuels. Increase in particle density and size was found out to widen the range of possible airflow rates, and transfer the maximum rate of ignition front propagation toward fuel lean conditions. Increase in the average sphericity of particles decreases the porosity of the bed. Mixing of small and large particles seems to be advantageous for combustion so that small particles change the optimum airflow rate to fuel rich conditions and large particles widen the usable range of airflow rates. A correlation was found for the maximum rate of ignition front propagation in beds of wood fuels.

AB - Propagation of the ignition front against airflow in packed beds of different wood fuels has been studied. The results of experiments carried out with pellets and mixtures of wood chips and sawdust are presented and compared with earlier experiments with different wood fuels. Increase in particle density and size was found out to widen the range of possible airflow rates, and transfer the maximum rate of ignition front propagation toward fuel lean conditions. Increase in the average sphericity of particles decreases the porosity of the bed. Mixing of small and large particles seems to be advantageous for combustion so that small particles change the optimum airflow rate to fuel rich conditions and large particles widen the usable range of airflow rates. A correlation was found for the maximum rate of ignition front propagation in beds of wood fuels.

KW - biomass

KW - biofuels

KW - wood fuels

KW - combustion

KW - ignition

KW - air flow

KW - wood chips

KW - sawdust

KW - particles

KW - packed beds

KW - models

KW - emissions

U2 - 10.1021/ef010209d

DO - 10.1021/ef010209d

M3 - Article

VL - 16

SP - 676

EP - 686

JO - Energy & Fuels

JF - Energy & Fuels

SN - 0887-0624

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ER -