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Emissions reduction from wood pellet stoves by uniform feeding

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  • Da Lio, L.
  • Bortolus, M.
  • Canu, P.

Abstract

The instantaneous fuel-to-air ratio in pellet stoves may vary because of the feeding mechanism. The pellet feed flow rate variability of a standard screw feeder was quantitatively assessed with real-time measurements. Temporary excess or deficit of pellets commonly occur. The variability can be significantly reduced with a new feeder, by approx. 70%, both at nominal (full) and partial (half) load operation. The analysis of the instantaneous emissions reveals that the fuel feed instabilities cause temporary sub-optimal fuel-to-air ratio and, in turn, peaks of pollutants emissions. The impact on the emissions of a more regular pellet feeder is impressive. A reduction of CO emission by 46% and 37.5%, and of PM by 52% and 44% at nominal and partial load, respectively was measured. NOx emissions are less affected by a more uniform feed rate, being predominantly from fuel nitrogen.

Suggested Citation

  • Da Lio, L. & Bortolus, M. & Canu, P., 2025. "Emissions reduction from wood pellet stoves by uniform feeding," Renewable Energy, Elsevier, vol. 242(C).
    • Handle: RePEc:eee:renene:v:242:y:2025:i:c:s0960148124023413
    DOI: 10.1016/j.renene.2024.122273
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    References listed on IDEAS

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    1. Valentina Coccia & Ramoon Barros Lovate Temporim & Alessandro Paglianti & Alessia Di Giuseppe & Franco Cotana & Andrea Nicolini, 2025. "Energy and Environmental Valorisation of Residual Wood Pellet by Small Size Residential Heating Systems," Sustainability, MDPI, vol. 17(9), pages 1-17, April.
    2. Rui Pinho & Amadeu D. S. Borges, 2025. "Comprehensive Evaluation of Combustion Performance and Emissions from Commercial Pellets in Small-Scale Boilers," Energies, MDPI, vol. 18(13), pages 1-17, July.

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