Self-heating and autoignition of coal in rock silos

Juha Sipilä, Pertti Auerkari, Stefan Holmström, Jyrki Itkonen, Ulrich Krause, Iris Vela, Michael Löscher

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

Abstract

Storing solid fuels like coal in large quantity is known to involve a risk of spontaneous combustion. In comparison to conventional open stockpiles, closed storage may in principle decrease this risk by more limited ingress of air, but the risk can also be enhanced for example by reduced access for preventive or mitigating action. The risk of self-heating until ignition is considered here for a unique underground rock storage of a coal-fired power plant. The main adverse consequence of non-functioning storage is interrupted district heating that is more difficult to replace in winter than lost electricity supply. To predict the risk of spontaneous combustion with reasonable confidence, material modelling of coal properties has been applied with verification by comparison to actual field evidence. Fire risk management is discussed in terms of the available early warning indicators and options for cooling, extinguishing and prioritised use of stored fuel.
Original languageEnglish
Title of host publicationBaltica IX. International Conference on Life Management and Maintenance for Power Plants - Abstracts
EditorsPertti Auerkari, Juha Veivo
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Pages44
ISBN (Electronic)978-951-38-8030-9
ISBN (Print)978-951-38-8029-3
Publication statusPublished - 2013
MoE publication typeNot Eligible
EventBALTICA IX - International Conference on Life Management and Maintenance for Power Plants - Helsinki-Stockholm, Finland
Duration: 11 Jun 201313 Jun 2013

Publication series

NameVTT Technology
PublisherVTT
Number107
ISSN (Print)2242-1211
ISSN (Electronic)2242-122X

Conference

ConferenceBALTICA IX - International Conference on Life Management and Maintenance for Power Plants
CountryFinland
CityHelsinki-Stockholm
Period11/06/1313/06/13

Fingerprint

coal
heating
rock
combustion
electricity supply
coal-fired power plant
cooling
winter
air
modeling
comparison

Cite this

Sipilä, J., Auerkari, P., Holmström, S., Itkonen, J., Krause, U., Vela, I., & Löscher, M. (2013). Self-heating and autoignition of coal in rock silos. In P. Auerkari, & J. Veivo (Eds.), Baltica IX. International Conference on Life Management and Maintenance for Power Plants - Abstracts (pp. 44). Espoo: VTT Technical Research Centre of Finland. VTT Technology, No. 107
Sipilä, Juha ; Auerkari, Pertti ; Holmström, Stefan ; Itkonen, Jyrki ; Krause, Ulrich ; Vela, Iris ; Löscher, Michael. / Self-heating and autoignition of coal in rock silos. Baltica IX. International Conference on Life Management and Maintenance for Power Plants - Abstracts. editor / Pertti Auerkari ; Juha Veivo. Espoo : VTT Technical Research Centre of Finland, 2013. pp. 44 (VTT Technology; No. 107).
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Sipilä, J, Auerkari, P, Holmström, S, Itkonen, J, Krause, U, Vela, I & Löscher, M 2013, Self-heating and autoignition of coal in rock silos. in P Auerkari & J Veivo (eds), Baltica IX. International Conference on Life Management and Maintenance for Power Plants - Abstracts. VTT Technical Research Centre of Finland, Espoo, VTT Technology, no. 107, pp. 44, BALTICA IX - International Conference on Life Management and Maintenance for Power Plants, Helsinki-Stockholm, Finland, 11/06/13.

Self-heating and autoignition of coal in rock silos. / Sipilä, Juha; Auerkari, Pertti; Holmström, Stefan; Itkonen, Jyrki; Krause, Ulrich; Vela, Iris; Löscher, Michael.

Baltica IX. International Conference on Life Management and Maintenance for Power Plants - Abstracts. ed. / Pertti Auerkari; Juha Veivo. Espoo : VTT Technical Research Centre of Finland, 2013. p. 44 (VTT Technology; No. 107).

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

TY - CHAP

T1 - Self-heating and autoignition of coal in rock silos

AU - Sipilä, Juha

AU - Auerkari, Pertti

AU - Holmström, Stefan

AU - Itkonen, Jyrki

AU - Krause, Ulrich

AU - Vela, Iris

AU - Löscher, Michael

PY - 2013

Y1 - 2013

N2 - Storing solid fuels like coal in large quantity is known to involve a risk of spontaneous combustion. In comparison to conventional open stockpiles, closed storage may in principle decrease this risk by more limited ingress of air, but the risk can also be enhanced for example by reduced access for preventive or mitigating action. The risk of self-heating until ignition is considered here for a unique underground rock storage of a coal-fired power plant. The main adverse consequence of non-functioning storage is interrupted district heating that is more difficult to replace in winter than lost electricity supply. To predict the risk of spontaneous combustion with reasonable confidence, material modelling of coal properties has been applied with verification by comparison to actual field evidence. Fire risk management is discussed in terms of the available early warning indicators and options for cooling, extinguishing and prioritised use of stored fuel.

AB - Storing solid fuels like coal in large quantity is known to involve a risk of spontaneous combustion. In comparison to conventional open stockpiles, closed storage may in principle decrease this risk by more limited ingress of air, but the risk can also be enhanced for example by reduced access for preventive or mitigating action. The risk of self-heating until ignition is considered here for a unique underground rock storage of a coal-fired power plant. The main adverse consequence of non-functioning storage is interrupted district heating that is more difficult to replace in winter than lost electricity supply. To predict the risk of spontaneous combustion with reasonable confidence, material modelling of coal properties has been applied with verification by comparison to actual field evidence. Fire risk management is discussed in terms of the available early warning indicators and options for cooling, extinguishing and prioritised use of stored fuel.

M3 - Conference abstract in proceedings

SN - 978-951-38-8029-3

T3 - VTT Technology

SP - 44

BT - Baltica IX. International Conference on Life Management and Maintenance for Power Plants - Abstracts

A2 - Auerkari, Pertti

A2 - Veivo, Juha

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Sipilä J, Auerkari P, Holmström S, Itkonen J, Krause U, Vela I et al. Self-heating and autoignition of coal in rock silos. In Auerkari P, Veivo J, editors, Baltica IX. International Conference on Life Management and Maintenance for Power Plants - Abstracts. Espoo: VTT Technical Research Centre of Finland. 2013. p. 44. (VTT Technology; No. 107).