Environmentally friendly future power generation with fossil fuels [Zukünftige klimafreundliche Stromversorgung mit fossil befeuerten Kraftwerken]
In the future, power generation in Germany will be increasingly influenced by the preferential supply from fluctuating wind and photovoltaic sources. The planned capacity growth using these technologies will result in fluctuating power sources having to cover electricity demand completely in certain times. Under windless conditions and with no sun shining, however, a demand of up to 45 GW must be covered by power generation capacity which is at any time available. Any additional capacity to the currently existing water or biomass will not be sufficient to fill this gap. Consequently, power generation from fossil primary energy sources will continue to be needed also in Germany. The achievement of the declared CO2 emission targets can then only be reached with the assistance of CCS. The gaps caused by fluctuating energy sources need to be filled. Thus, in future, both, the conventional and the CCS-equipped fossilfuelled power stations, not only have to demonstrate very flexible load following but have to be able to start-up and shutdown frequently, too. These requirements stay in conflict with the increase of plant efficiency by further raising steam parameters. The emphasis in the future development of fossil-fuelled power stations for the German market will therefore focus on operation flexibility.