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Numerical Calculations of WR-40 Boiler Based on its Zero-Dimensional Model

100%

Hernik B.

Chemical and Process Engineering

2014

vol. 35

issue 2

173-180

Generally, the temperature of flue gases at the furnace outlet is not measured. Therefore, a special computation procedure is needed to determine it. This paper presents a method for coordination of the numerical model of a pulverised fuel boiler furnace chamber with the measuring data in a situation when CFD calculations are made in regard to the furnace only. This paper recommends the use of the classical 0-dimensional balance model of a boiler, based on the use of measuring data. The average temperature of flue gases at the furnace outlet tk" obtained using the model may be considered as highly reliable. The numerical model has to show the same value of tk" . This paper presents calculations for WR-40 boiler. The CFD model was matched to the 0-dimensional tk" value by means of a selection of the furnace wall emissivity. As a result of CFD modelling, the flue gas temperature and the concentration of CO, CO2, O2 and NOx were obtained at the furnace chamber outlet. The results of numerical modelling of boiler combustion based on volumetric reactions and using the Finite-Rate/Eddy-Dissipation Model are presented.

Numerical Calculations of WR-40 Boiler Based on its Zero-Dimensional Model

88%

Hernik B.

Chemical and Process Engineering

2014

issue 2

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2 Chemical and Process Engineering

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2 Hernik B.

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Numerical Calculations of WR-40 Boiler Based on its Zero-Dimensional Model

Numerical Calculations of WR-40 Boiler Based on its Zero-Dimensional Model