Siemens is building a combined cycle power plant (CCPP) with an electrical output of 595 megawatts in Düsseldorf. That’s a world record for a single combined cycle block. The net energy conversion efficiency will come to more than 61 percent. That’s also a world record, surpassing the previous record of 60.75 percent at the combined cycle power plant in Irsching. A third world record will be achieved through the extraction of energy for district heating. Never before has it been possible to extract 300 megawatts of thermal energy from a single gas turbine power plant block in combined cycle operation. In this way, the overall efficiency of natural gas as a fuel climbs to 85 percent.
The SGT5-8000H gas turbine, which has been proving itself in commercial service in Irsching for more than a year, will be installed at the Lausward site in the harbor district of Düsseldorf. It was developed over a period of about ten years by some 750 employees at Siemens locations in Erlangen, Berlin, Mühlheim, and Orlando in the U.S. state of Florida in cooperation with universities and research institutes. Twelve gas turbines from the SGT-8000H series are currently on order for energy supply utilities in Germany, South Korea, and the U.S. Additional orders are on the way. In combined cycle operation, a single SGT5-8000H gas turbine can supply electrical power to all of the private households in a major city like Berlin with 3.5 million residents.
High-efficiency combined cycle power plants are an ideal complement to renewable energy sources like wind and solar, which are subject to fluctuations in their power output. Combined cycle power plants can quickly and flexibly balance out these fluctuations. They make a considerable contribution to the security of the power supply and stabilization of the power grid and play an important role in Germany's transition to alternative energy sources. The new generation of combined cycle power plants from Siemens also consumes around one-third less natural gas per generated kilowatt-hour of electricity compared to the average consumption of CCPPs installed worldwide. In addition to lowering fuel costs, this technology also helps to protect the climate by significantly reducing CO2 emissions.