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FP5

BIO FLAM Résumé de rapport

Project ID: ENK5-CT-1999-00004
Financé au titre de: FP5-EESD
Pays: Poland

Modelling of combustion of non-spherical particle

NSPCM (Non Spherical Particle Combustion Model) has been developed and tested.

The NSPCM can be used for modelling combustion of non-spherical particles of materials like biomass. The model is based on well-known coal combustion model, describing spherical particle combustion.

Two modifications are implemented in order to include non-spherical shape of the particles:
- Reaction surface is multiplied by the particle shape coefficient PSC.
- Real Nusselt number is used for oxygen iffusion to the particle instead of Nu=2 used in the coal model.

The model assure accurate results in full range of particle burnout when the PSC is corrected during combustion. Hyperbolic function with exponent parameter p has been proposed for description of changes of the PSC.

The computational cost of the model application is low due to a fact that particle is considered as a sphere and necessary model parameters PSC, Nu, and p are determined in advance before basic calculation.

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Résultat en bref

Reported by

Instytut Energetyki
5 ul. Augustowka 5
02 981 Warszawa
Poland
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