Heat transfer corrected isothermal model for devolatilization of thermally-thick biomass particles

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Abstract

Isothermal model used in current computational fluid dynamic (CFD) model neglect the internal heat transfer during biomass devolatilization. This assumption is not reasonable for thermally-thick particles. To solve this issue, a heat transfer corrected isothermal model is introduced. In this model, two heat transfer corrected coefficients: HT-correction of heat transfer and HR-correction of reaction, are defined to cover the effects of internal heat transfer. A series of single biomass devitalization case have been modeled to validate this model, the results show that devolatilization behaviors of both thermally-thick and thermally-thin particles are predicted reasonable by using heat transfer corrected model, while, isothermal model overestimate devolatilization rate and heating rate for thermlly-thick particle.This model probably has better performance than isothermal model when it is coupled with CFD to model devolatilization of thermally-thick biomass particles.
Original languageEnglish
Publication date2017
Number of pages12
Publication statusPublished - 2017
EventNordic Flame Days - KTH - The Royal Institute of Technology , Stockholm, Sweden
Duration: 10 Oct 201711 Oct 2017

Conference

ConferenceNordic Flame Days
LocationKTH - The Royal Institute of Technology
CountrySweden
CityStockholm
Period10/10/201711/10/2017

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