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Experimental investigation on air displacement and air excess effect on CO, CO2 and NOx emissions of a small size fixed bed biomass boiler

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  • Caposciutti, Gianluca
  • Antonelli, Marco

Abstract

Biomass has a key role in the future of the energetic scenario, since it is a programmable renewable energy source which is suitable either to generate power and/or produce heat. This paper deals with biomass combustion processes in small size boilers, which is suited either for large residential buildings, or for small size industrial users. This kind of boilers is different from small pellet stoves and fireplaces and from large utility size boilers. In particular, those small size boilers have been seldom studied in the scientific literature about the combustion kinetics and pollutant formation mechanisms. Hence, the authors present the thermo-chemical data collected from a 140 kWth chipped wood boiler at the University of Pisa. The effect of the air excess and the ratio between and secondary feeding air and primary feeding air mass flow rate, on CO, CO2 and NOx emissions was investigated. Results have shown that the air excess has the main influence on the pollutant produced. A comparison of the measured data with those presented in the literature and the discrepancies with other studies are also discussed.

Suggested Citation

  • Caposciutti, Gianluca & Antonelli, Marco, 2018. "Experimental investigation on air displacement and air excess effect on CO, CO2 and NOx emissions of a small size fixed bed biomass boiler," Renewable Energy, Elsevier, vol. 116(PA), pages 795-804.
    • Handle: RePEc:eee:renene:v:116:y:2018:i:pa:p:795-804
    DOI: 10.1016/j.renene.2017.10.001
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    References listed on IDEAS

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    1. Mun, Tae-Young & Tumsa, Tefera Zelalem & Lee, Uendo & Yang, Won, 2016. "Performance evaluation of co-firing various kinds of biomass with low rank coals in a 500 MWe coal-fired power plant," Energy, Elsevier, vol. 115(P1), pages 954-962.
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    3. Bentsen, Niclas Scott & Jack, Michael W. & Felby, Claus & Thorsen, Bo Jellesmark, 2014. "Allocation of biomass resources for minimising energy system greenhouse gas emissions," Energy, Elsevier, vol. 69(C), pages 506-515.
    4. Khodaei, Hassan & Al-Abdeli, Yasir M. & Guzzomi, Ferdinando & Yeoh, Guan H., 2015. "An overview of processes and considerations in the modelling of fixed-bed biomass combustion," Energy, Elsevier, vol. 88(C), pages 946-972.
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    Cited by:

    1. Kshirsagar, Milind P. & Kalamkar, Vilas R., 2020. "Application of multi-response robust parameter design for performance optimization of a hybrid draft biomass cook stove," Renewable Energy, Elsevier, vol. 153(C), pages 1127-1139.
    2. Zadravec, Tomas & Rajh, Boštjan & Kokalj, Filip & Samec, Niko, 2021. "Influence of air staging strategies on flue gas sensible heat losses and gaseous emissions of a wood pellet boiler: An experimental study," Renewable Energy, Elsevier, vol. 178(C), pages 532-548.
    3. Chapela, S. & Porteiro, J. & Garabatos, M. & Patiño, D. & Gómez, M.A. & Míguez, J.L., 2019. "CFD study of fouling phenomena in small-scale biomass boilers: Experimental validation with two different boilers," Renewable Energy, Elsevier, vol. 140(C), pages 552-562.

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