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dc.contributor.authorHaberle, Inge
dc.contributor.authorHaugen, Nils Erland L
dc.contributor.authorSkreiberg, Øyvind
dc.date.accessioned2018-02-23T07:36:34Z
dc.date.available2018-02-23T07:36:34Z
dc.date.created2017-11-19T12:46:35Z
dc.date.issued2017
dc.identifier.citationEnergy & Fuels. 2017, 31 (12), 13743-13760.nb_NO
dc.identifier.issn0887-0624
dc.identifier.urihttp://hdl.handle.net/11250/2486595
dc.description.abstractThe primary focus of this paper is on studying different numerical models for drying of wet wood particles. More specifically, the advantages and disadvantages of the models, with respect to numerical efficiency, stability, and accuracy, are investigated. The two basic models that are studied in detail are the thermal drying model and the kinetic rate drying model. The drying models have been implemented in an in-house simulation tool that solves for drying and devolatilization of a one-dimensional cylindrical wood log. It is found that the choice of drying model can significantly influence the computational time associated with the thermal conversion. Furthermore, the occurrence of numerical pressure oscillations in the thermal drying model has been found and investigated. The numerical oscillations are reduced by introducing an evaporation fraction, fevap. When the thermal drying model is applied, the drying zone is very thin, commonly only including one grid point, which can result in numerical instabilities. The evaporation fraction allows the smearing of the drying zone by reducing the heat flux used for evaporation of liquid water and using the residual heat flux for heating the grid points. Reducing the evaporation fraction also resulted in reduced CPU times. It was found that model accuracy was not significantly influenced by the choice of drying model.nb_NO
dc.language.isoengnb_NO
dc.publisherAmerican Chemical Societynb_NO
dc.titleDrying of Thermally Thick Wood Particles: A Study of the Numerical Efficiency, Accuracy, and Stability of Common Drying Modelsnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.source.pagenumber13743-13760nb_NO
dc.source.volume31nb_NO
dc.source.journalEnergy & Fuelsnb_NO
dc.source.issue12nb_NO
dc.identifier.doi10.1021/acs.energyfuels.7b02771
dc.identifier.cristin1515709
dc.relation.projectNorges forskningsråd: 243752nb_NO
dc.relation.projectNotur/NorStore: NN9405Knb_NO
dc.description.localcode© American Chemical Society 2017. This is the authors accepted and refereed manuscript to the article. Locked until 7.12.2018 due to copyright restrictions.nb_NO
cristin.unitcode194,64,25,0
cristin.unitnameInstitutt for energi- og prosessteknikk
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode2


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