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Dynamik der Energiewandlung
Logo Leibniz Universität Hannover
Dynamik der Energiewandlung
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Gas Engine Test Rig

Gas and biogas engines are an increasingly important alternative to energy conversion for stationary applications, whereby their use in combined heat and power plants for the simultaneous use of electricity and heat is ecological and efficient. As a result of the energy conversion, it is expected that stationary gas engines will increasingly be used for reserve power plants as well, since they are quickly available and can be switched on easily, with low emissions at the same time. 

Research is necessary in the area of increasing efficiency, in the design of combustion processes, also with regard to residual pollutants such as unburned hydrocarbons, and in the influences of rapid start-up and load change processes. For this purpose, two gas engines are used in the research alliance "Dynamics of Energy Conversion" (DEW). According to current planning, they consist of single-cylinder research units with a displaced volume of two liters, which is typical for commercial vehicles.  One of them has an optical accessibility to permit detailed measurements of the ignition and combustion process, while the other engine is designed close to series production and permits measurements of efficiency and pollutant emissions over a wide performance map range.

Both gas engine test rigs are flexible with regard to operating mode, fuel gas types, gas injection and ignition concepts, and coupling with parallel possible diesel combustion for dual-fuel applications, so that a broad variability of research topics is possible. Current research topics in the field of gas engine research are the dual-fuel application of inexpensive unesterified bio-oils in a pre-evaporator concept together with a diesel engine, the emission of unburned hydrocarbons in gas engines, the ignition of gas engines through purged pre-chamber concepts and the torque and efficiency increase of large lean gas engines through targeted high-turbulence combustion processes. A transparent engine is currently being converted for the use of gas engine combustion processes.