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Evaluation of self-heating in Miscanthus x giganteus energy crop clamps and the implications for harvesting time

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  • Everard, Colm D.
  • Finnan, John
  • McDonnell, Kevin P.
  • Schmidt, Martin

Abstract

Miscanthus x giganteus energy crop grown in Ireland was harvested on 21st of February and 28th of March 2012 to examine the effects of harvesting time on self-heating during storage of Miscanthus chips in clamps (98 m3) under weather sheltered conditions. There was a relatively large difference in moisture content, of 21.4%, between Miscanthus crop harvested in February and March (41.6 and 20.2%, respectively). Temperature evolution over a storage period of up to 125 days was monitored at different heights and distances from the centre within the clamps. Maximum temperature in the February constructed clamp reached 69 °C compared to 28 °C in the March constructed clamp. Microbial activity was monitored via carbon dioxide and oxygen gas measurements. The high moisture clamp showed higher microbial activity and a volume yield loss of 4.3% due to decomposition in the top section of the clamp. Quality indices post-storage were also assessed. Calorific values from Miscanthus sampled 1 m below the top surface were similar after storage for both February and March constructed clamps, i.e. 18.52 and 18.70 MJ kg−1, respectively. A reliable assessment of self-heating in Miscanthus chip clamps has important consequences for both self-ignition risk and biomass quality.

Suggested Citation

  • Everard, Colm D. & Finnan, John & McDonnell, Kevin P. & Schmidt, Martin, 2013. "Evaluation of self-heating in Miscanthus x giganteus energy crop clamps and the implications for harvesting time," Energy, Elsevier, vol. 58(C), pages 350-356.
    • Handle: RePEc:eee:energy:v:58:y:2013:i:c:p:350-356
    DOI: 10.1016/j.energy.2013.06.022
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    References listed on IDEAS

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    1. Chico-Santamarta, Leticia & Godwin, Richard John & Chaney, Keith & White, David Richard & Humphries, Andrea Claire, 2013. "On-farm storage of baled and pelletized canola (Brassica napus L.) straw: Variations in the combustion related properties," Energy, Elsevier, vol. 50(C), pages 429-437.
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    1. Chen, Xinke & Yan, Hongchi & Ma, Lun & Fang, Qingyan & Deng, Shuanghui & Wang, Xuebin & Yin, Chungen, 2023. "Moisture content effects on self-heating in stored biomass: An experimental study," Energy, Elsevier, vol. 285(C).
    2. Yin, Chungen & Wang, Yonghao & Fang, Qingyan & Chen, Xinke & Yan, Hongchi & Ma, Lun, 2024. "Self-heating and spontaneous ignition of biomass storage piles: Towards a reliable prediction tool," Renewable Energy, Elsevier, vol. 228(C).

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