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Study of the transient release of water vapor from a fuel bed of wet biomass in a reciprocating-grate furnace
Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för byggd miljö och energiteknik (BET).
RISE, Sweden;Södra Innovation, Sweden.
Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för byggd miljö och energiteknik (BET).ORCID-id: 0000-0002-8086-1518
Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för byggd miljö och energiteknik (BET).
2019 (engelsk)Inngår i: Journal of the Energy Institute, ISSN 1743-9671, Vol. 92, nr 4, s. 843-854Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The present study investigates how sudden changes in fuel moisture affected the combustion characteristics of the fuel bed in a 4-MW reciprocating-grate furnace. The moisture content of the fuel fed to the furnace was monitored online using a near-infrared spectroscopy device, and the water vapor concentration in the flue gas was measured continuously. To obtain experimental data on fuel-bed conditions, the temperature and gas composition in the bed were measured using a probe. A simplified drying model was developed using the measured gas composition values as inputs. The model was then used to estimate the drying rate and to simulate the extent of the drying zone along the grate. Measurements indicated that a change in the moisture content of the fuel fed to the furnace was detected as a change in water vapor concentration in the flue gas with a delay of about 2 h. The model predicted that a portion of wet fuel would need about 2 h to become dry, in line with the measured time delay of the water vapor concentration change in the flue gas. Overall, there was good alignment between the measured and simulated results, supporting the validity of the model and the assumed mechanisms.

sted, utgiver, år, opplag, sider
Elsevier, 2019. Vol. 92, nr 4, s. 843-854
HSV kategori
Forskningsprogram
Teknik, Bioenergiteknik/Energi- och Miljöteknik
Identifikatorer
URN: urn:nbn:se:lnu:diva-77594DOI: 10.1016/j.joei.2018.06.014ISI: 000473381000002Scopus ID: 2-s2.0-85053155711OAI: oai:DiVA.org:lnu-77594DiVA, id: diva2:1246057
Tilgjengelig fra: 2018-09-06 Laget: 2018-09-06 Sist oppdatert: 2019-08-29bibliografisk kontrollert

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