CHP-Units with Stirling Engines for Landfi ll Gas Utilization

But in the last years the energy policy objectives are changed and new technological developments were the base to bring the stirling engine back to the market. The main advantage of the stirling engine is the possibility to work with each kind of fuel because the burning process is outside of the engine. Hence also problematic fuels or non-liquid fuels can be used for stirling engines which can't be operated in combustion engines. In Addition the new developed stirling engines need less service and have very low emissions of the exhaust gas, only.The “cleanergy” company has implemented a new “Flox” burning unit for landfill gas on ist C9G CHP-unit. The electrical power of this unit is modulating between 2 kW and 9 kW. If landfillgas will be used for this engine the continuous power is limited to 7 kW. The electrical efficiencyis situated between 16 % and 24 % depending of the load and the temperature of the cooling water. The total efficiency is about 90 %.