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ICHMT DIGITAL LIBRARY ONLINE

ISSN 961-91393-0-5

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You can order single issue or individual article. To purchase a single issue or an individual article as well as to view tables of contents and abstracts click on issue number.

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Year 2005

• 18th Australasian Heat and Mass Transfer Conference
Curtin University of Technology, Perth, Western Australia, 26-29 July 2005

239 pages

Volume price - $518.00

Numerical modelling of an Opposite Wall Fired Furnace - Effect of Operating Conditions

H. B. Vuthaluru
Department of Chemical Engineering, Curtin University of Technology GPO, Box U1987 Western Australia 6845, Australia

R. Vuthaluru
Department of Chemical Engineering, Curtin University of Technology GPO, Box U1987 Western Australia 6845, Australia

ABSTRACT

Numerical modelling full scale pulverised coal furnace using commercial CFD code Fluent is presented in this paper. The mathematical model is based on a Eulerian description for the continuum phase and a stochastic Lagrangian description for the coal particles. A three-dimensional combustor model is used to determine the temperature and heat flux profiles for a typical 500 MW boiler with medium volatile coal. The predicted temperature profiles for a 100% boiler load and different reduced boiler loads are considered. Particle trajectories are analysed to identify the causes of operational problems such as fouling on burners due to recirculation of coal particles and temperatures achieved in various parts of the boiler during the combustion process. The effects of particle size and excess air on the furnace temperature pattern are also studied.