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Bernd Epple
Energy Systems and Technology, Darmstadt University of Technology, Petersenstr. 30, D-64287 Darmstadt, Germany

Uwe Schnell
Institute of Process Engineering and Power Plant Technology (IVD), University of Stuttgart, Pfaffenwaldring 23, D-70550, Stuttgart, Germany


The current capabilities of mathematical models for the simulation of coal combustion in utility boiler furnaces are presented. The models are able to predict fluid flow, heat transfer rates (in these cases dominated by radiation), distribution of chemical species and pollutants like nitrogen oxide. The impact of computational fluid dynamics on pollutant reduction measures is demonstrated by three examples, starting with a pilot scale coal combustion test rig with a thermal input of 0.5 MW, followed by the furnace of a 160 MW power plant fired with a combination of hard coal and lignite and terminated with a 490 MW utility boiler furnace with eight pulverized coal swirl burners. The results of all predictions show that the influence of process parameter variation on temperature and nitrogen oxide concentration can be predicted at least to an engineering accuracy. Furthermore, arrangements for an optimized application of NOx reduction processes can be deduced and it can be judged by these prediction results whether a change of parameters is likely to produce lower emissions or not.

ICHMT Digital Library

Bow shocks on a jet-like solid body shape. Thermal Sciences 2004, 2004. Pulsed, supersonic fuel jets - their characteristics and potential for improved diesel engine injection. PULSED, SUPERSONIC FUEL JETS - THEIR CHARACTERISTICS AND POTENTIAL FOR IMPROVED DIESEL ENGINE INJECTION
View of engine compartment components (left). Plots of temperature distributions in centreplane, forward of engine (right). CHT-04 - Advances in Computational Heat Transfer III, 2004. Devel... DEVELOPMENT AND CURRENT STATUS OF INDUSTRIAL THERMOFLUIDS CFD ANALYSIS
Pratt & Whitney's F-135 Joint Strike Fighter Engine under test in Florida is a 3600F class jet engine. TURBINE-09, 2009. Turbine airfoil leading edge stagnation aerodynamics and heat transfe... TURBINE AIRFOIL LEADING EDGE STAGNATION AERODYNAMICS AND HEAT TRANSFER - A REVIEW
Refractive index reconstructed field. (a) Second iteration. (b) Fourth iteration. Radiative Transfer - VI, 2010. Theoretical development for refractive index reconstruction from a radiative ... THEORETICAL DEVELOPMENT FOR REFRACTIVE INDEX RECONSTRUCTION FROM A RADIATIVE TRANSFER EQUATION-BASED ALGORITHM
Two inclusion test, four collimated sources. Radiative Transfer - VI, 2010. New developments in frequency domain optical tomography. Part II. Application with a L-BFGS associated to an inexa... NEW DEVELOPMENTS IN FREQUENCY DOMAIN OPTICAL TOMOGRAPHY. PART II. APPLICATION WITH A L-BFGS ASSOCIATED TO AN INEXACT LINE SEARCH