WORK PACKAGE 4

Tasks

  • 4.1.Preliminary optimization of the Mild Oxy combustion boiler
  • 4.2.Implementation of the new RANS model into CFD code
  • 4.3.Selection of the final geometry of the boiler
  • 4.4.Optimization of the fuel and oxidizer supply in Mild Oxy combustion boiler
  • 4.5.Assessment of fuel flexibility CFD study in Mild Oxy combustion
  • 4.6.Calculation of specific emissions and thermal efficiency of the Mild Oxy Combustion Boiler
  • 4.7.Simulation of the small scale boiler Mild Oxy combustion

Work Package 4 information

WP 4 leader: Gabriel Węcel/PhD

The main objectives of this WP are optimization of the design and operation parameters of the boiler running under Mild Oxy combustion regime, energy and ecology assessment of the Mild Oxy Combustion Boilers, the demonstration of performance and ability of new RANS DNS based model during simulation of Mild Oxy combustion process in industrial scale boilers.

The new RANS model develop at SINTEF during realization of WP3 will be implemented in CFD code as own subroutine. The ANSYS/Fluent commercial package will be used as main fluid flow solver. The near field particle turbulence, devolatilization and char combustion models will be implemented by means of User Defined Functions (UDF). The correctness of implementation will be checked by performing calculations and comparing
results to these obtained from DNS simulations carried out by SINTEF during realization of WP1. The operation of experimental stand used during realization of WP2 at ITT will be numerically simulated by new RANS model.
The results of the calculations will be compared to the data collected during experiment.
The results of the optimizations simulations of the industrial boilers with use of new Mild Oxy combustion RANS model will be used during realization of WP5. The optimal for combustion process, boiler design and operation parameters will be assessed by economic and ecological analysis.