Alexander Schmitt, G.A.S. Energietechnik , stressed in his lecture that landfill gas will be signed through decreased methane content in future and discussed the possibilities for landfill operators to use the gas for commercial and energy recovery. Firedamp , which diffused out of coal-mines , can form together with air an explosive mixture. Many times safety solutions has the disadvantage to let the climatic relevant methane directly into the atmosphere. In comparison with ignition plugs the ignition energy disposed through a pilot injection is about 4 or 5 ten-power higher. With that ideal assumption are given to burn away also gas with a high inert gas content with a good efficiency.
Differences shows only gases with the main burn component carbon monoxide.
The advances , which were achieved meanwhile at the simulation of reactive flows, showed Stephan Laiminger from the TU Graz in his essay . Because of the complex reaction kinetics inside of a combustion engine simplified kinetic approaches, for example Magnussen model, must be used. Towards to them delivers the PDF-model mostly better results, because of the explicit consideration of turbulence and reaction kinetic. If the models will be adapted on experimental determined courses of pressure and combustion, CFD-calculations can be used for parameter studies in the gas engine development. Essential for verification of the above-mentioned calculation models are measurements of pollutant concentration and temperatures within the combustion chamber.