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.
|Number of pages||12|
|Publication status||Published - 2017|
|Event||Nordic Flame Days - KTH - The Royal Institute of Technology , Stockholm, Sweden|
Duration: 10 Oct 2017 → 11 Oct 2017
|Conference||Nordic Flame Days|
|Location||KTH - The Royal Institute of Technology|
|Period||10/10/2017 → 11/10/2017|