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Interactive educational system for coal combustion modeling in Power Plant boilers

This presentation introduces an interactive educational system for coal combustion modeling, using computation fluid dynamics (CFD) and visualization. The system features a fast and simple real-time fluid simulator, a virtual coal particle system with a simplified combustion engine, and real-time visualization using OpenGL. Results have been tested for reliability with FLUENT and the system is designed for educational purposes and preview design. Future research includes precision improvements, further testing on real boiler tasks, and experimenting with a real-time 3D combustion system.

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Interactive educational system for coal combustion modeling in Power Plant boilers

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  1. www.cgg.cvut.cz Interactive educational system for coal combustion modeling in Power Plant boilers Marek Gayer, Pavel Slavík and František Hrdlička Computer Graphics Group Department of Computer Science and Engineering Faculty of Electrical Engineering of CTU in Prague Czech Republic IEEE Region 8 EUROCON 2003, Ljubljana, September 22-24, 2003

  2. Outline of the presentation • Brief introduction and motivation to • Interactive education • Combustion modelling • Computation fluid dynamics (CFD) • Our system overview and its key parts • Fluid simulator • Virtual coal particle system • Simplified combustion and heat transfer • Results reliability testing • Visualization and interactivity demonstration • Conclusion and future work

  3. Interactive education in general • Useful for complex cases where only theoretical explanation is ineffective • Often used in individual learning and practicing part of education • Doing by learning and “what if” concept • Motivates students, utilizes creativity • Is more effective, attractive and “fun”

  4. Introduction and motivation to coal combustion modeling and visualization • Both for the ecological and economical reasons • Finding optimal boiler configurations • To reduce pollution • Combustion optimization • To find a way for optimal fuel preparation • How can visualization help

  5. The modelling of fluid flow - CFD • Most often: solving complex differential equations (e.g. Navier-Stokes) • Fluid simulators for computer graphics(e.g. ACM SIGGRAPH Proceedings) • Coal combustion as an CFD application • Current solutions and systems: Precise, robust, well-known Slow, complex, no real-time => unsuitable for education + -

  6. Our system overview • Allows dynamic overview of the combustion process • Real-time simulation and visualization (2D simplification) • Designed on following key parts • Fluid simulator • Virtual coal particle system (with simplified combustion engine)

  7. Our Fluid Simulator • Dividing boiler area to grid cell arrays • Values updated in each time step • Principle of local simulation

  8. Virtual coal particle system • Used for both simulation and visualization of the combustion process • Virtual particle system approach • Simplified combustion and heat transfer computation • Movement determination: • Aerodynamic resistance • Gravity force

  9. Interaction of virtual coal particles Interaction of virtual coal particles t = 0 seconds: T= 343oC(above ignition)O2 concentration = 25% Coal particle Partially burned particle C C C C C t = 0.01 seconds: T= 345oC (increased)O2 concentration= 24% Partially burnedcoal particles Coal particle transformed to burned ash particle C C B

  10. Results comparison – numerical approach • Built-in numerical comparison code • Statistically compares the results between our system and FLUENT • From 60% to 80% cells are less than 30% different from FLUENT values (temperature, flow directions, ... )

  11. Sample visualization - cell characteristics

  12. Sample visualization – coal particles

  13. Sample visualization of particle characteristics (particle tracks)

  14. Sample visualization - statistics • Visualize values distribution in boiler • Available for all characteristics (about 10 particle and 40 cell) (e.g. for temperature or coal particle diameter distribution)

  15. Our interactive combustion system

  16. Conclusion and future research • Interactive, educational for coal combustion modelling featuring: • Fast & simple real-time fluid simulator • Particle system with simplified combustion engine • Real-time visualization using OpenGL • Results reliability tested with FLUENT • Designed for education and “preview” design • Future research: • Precision improvements – further to reality • Further testing on real boiler tasks • The real-time 3D combustion system experiment

  17. Thank you for your attention. ??? Do you have any questions ?

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