Transcript EES Annual Seminar 11.3.2013

EES Annual Seminar
11.3.2013
Innopoli 1, Otaniemi, Espoo
Progress Report
Georgios Kanellis
EES Annual Seminar 11.3.2013
Contents of the presentation
• About the PhD
• Working in the 1st year
• Goals for the 2nd year
Georgios Kanellis
2
EES Annual Seminar 11.3.2013
About the PhD
–Title: “Optimization Methods with CFD in Two Biomass-Based Boiler
Environments”
–The aim is to optimize (~minimize) nitric oxide (NO) and ammonium (NH3)
as well as carbon monoxide (CO) emissions both in bubbling fluidized bed
(BFB) and in kraft recovery (KR) boilers environments.
–The design variables are:
the amounts of the NH3 feeds
amounts and locations of air feeds
–The use of computational fluid dynamics (CFD) together with
mathematical optimization algorithms, i.e. multiobjective optimization, is
the main principle to reach the goal.
Georgios Kanellis
3
EES Annual Seminar 11.3.2013
The two boilers
Georgios Kanellis
4
EES Annual Seminar 11.3.2013
Working in the 1st year
• Run of the BFBB case using ANSYS FLUENT in parallel.
FLUENT
Temperature field inside the
Boiler (K)
Georgios Kanellis
5
EES Annual Seminar 11.3.2013
• NOx Modeling
exp
•
•
•
Duo Model for the SNCR,EDCM Model
for chemistry-turbulence interaction.
Brink - Duo Model for the SNCR, EDCM
Model for chemistry-turbulence
interaction.
Brink - Duo Model for the SNCR, EDC
Model for chemistry-turbulence
interaction.
NO mol fraction
Georgios Kanellis
6
EES Annual Seminar 11.3.2013
exp
•
•
•
Duo Model for the SNCR,EDCM Model
for chemistry-turbulence interaction.
Brink - Duo Model for the SNCR, EDCM
Model for chemistry-turbulence
interaction.
Brink - Duo Model for the SNCR, EDC
Model for chemistry-turbulence
interaction.
NH3 mol fraction
Georgios Kanellis
7
EES Annual Seminar 11.3.2013
• Developing the OpenFOAM solver
 Begin from calculating simpler cases
 Solved the non – reactive, compressible flow
equations taking into consideration turbulence and
radiation.
 Used the typical SIMPLE velocity – pressure
coupling combined with the local time stepping
technique for accelerating convergence.
 Modeled the species properties (polynomial
approximation for Cp, κ, μ)
 Currently modeling the reactive flow.
Georgios Kanellis
9.4.2015
8
EES Annual Seminar 11.3.2013
• OpenFOAM results in comparison with FLUENT
Velocity Magnitude Field (m/s)
OpenFOAM
FLUENT
Georgios Kanellis
9.4.2015
9
EES Annual Seminar 11.3.2013
Turbulent Kinetic Energy K (m2/s2)
OpenFOAM
FLUENT
Georgios Kanellis
9.4.2015
10
EES Annual Seminar 11.3.2013
Turbulent Energy Dissipation Rate ε (m2/s3)
OpenFOAM
FLUENT
Georgios Kanellis
9.4.2015
11
EES Annual Seminar 11.3.2013
Goals for the 2nd year
• Complete the OpenFOAM solver for the BFBB.
• Implement EDC in OpenFOAM and use it for the
prediction of NOx .
• Predict accurately both the NO and ammonia emissions.
• Start the optimization process for the BFBB.
Georgios Kanellis
12