Hitachi have also developed a highly accurate simulation model for analysis of combustion, heat transfer and water / steam characteristics in a boiler.
Method of calculation
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- Turbulent flow
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- k-ƒÃ model, 3D calculation
SIMPLE method (Semi-Implicit Method for Pressure Linked Equations)
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- Radiation
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- DT (Discrete Transfer) method
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- Combustion (gas phase)
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- Eddy dissipation model (major species)
Steady state assumption (nitrogen species, XN)
Equilibrium assumption (radicals)
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- Combustion (solid phase)
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- Two competing reactions model (pyrolysis)
Reaction and diffusion control (heterogeneous reaction)
Conclusion
- A Simplified NOx reaction model was developed for analyzing combustion performances of utility boilers.
- The model expressed low-NOx combustion performances of utility boilers.
- Optimum combustion system can be proposed based on this analysis combining our low-NOx burners.
Using these advanced combustion modeling techniques we can analyze the current operating conditions, review results and propose optimal solutions based upon actual operating parameters.
