In a combined cycle power plant (CCPP), a gas turbine driven generator generates electricity; the exhaust gas from the gas turbine is used in the Heat Recovery Steam Generator (HRSG) to produce steam for the steam turbine which also drives the generator in order to generate additional electricity. The additional steam cycle enhances the electrical output and efficiency of the overall plant.
The CCPP Sloecentrale consists of 2 single shaft units (2 SCC5-4000F units from Siemens) and all necessary auxiliary and ancillary equipment and buildings. In a single shaft unit the steam turbine and the gas turbine are designed as single shaft arrangement connected via a Synchronous-Self-Shifting Clutch (SSS). The generator is located between the gas turbine and the steam turbine.
The CCPP Sloecentrale will have an installed capacity of approx. 870 megawatts (MW). The gas-fired plant will produce power to meet the needs of more than 2 million households. The plant will be very environmentally friendly for several reasons. It is fired by natural gas only, which is cleaner than other fossil fuels. Additionally the combined cycle concept and the latest gas turbine technology minimize CO2 and NOx emissions. Compared to other fossil fired power plants the efficiency of a CCPP is higher and the emissions are lower.
To increase the usage factor of the fuel, the Sloecentrale plant will provide process steam to the adjoining plant of DELTIUS. Furthermore, the plant will be designed to operate in a flexible operation mode. To provide improved flexibility with faster start-up and load change capability, a BENSON type HRSG is used.
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