Woodchip size effect on combustion temperatures and volatiles in a small-scale fixed bed biomass boiler

Gianluca Caposciutti, Federica Barontini, Chiara Galletti, Marco Antonelli, Leonardo Tognotti and Umberto Desideri

Renewable Energy, 2020, vol. 151, issue C, 161-174

Abstract: Biomass combustion performance is greatly affected by the particle size distribution, which influences heat and mass transport phenomena. The present work investigates the effect of woodchip size distribution on combustion in a 140 kW underfeed stoker boiler. Three different fuel sizes were prepared, and their combustion performance was measured by monitoring temperatures inside and above the fire pit and the gas composition above the fuel bed. The gas composition was then correlated to the particle mean diameter. Although minor effects could be detected in the temperature and composition of the flue gases, a more uniform spatial distribution of volatiles was observed when employing bigger woodchips. The present results can improve the understanding of the impact of fuel size on the performance of woodchip-fired boilers and can be valuably used for numerical model validation.

Keywords: Biofuels; Fuel size; Biomass combustion; Particles size (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:151:y:2020:i:c:p:161-174

DOI: 10.1016/j.renene.2019.11.005

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