MODERNIZATION OF THE THERMAL POWER PLANT
THE MODERNIZATION CONSTRUCTION JOURNAL
You can find more information about the modernization of the thermal power station in the construction journal.
THE POWER PLANT IN NUMBERS
Lignite dust 72.5 MW, approx. 60,000 t/year
Natural gas 78.0 MW, approx. 34 million m³/year
Lignite dust boiler: 104 t/h
Waste heat boiler including additional firing: 67 t/h
(Steam parameters 500 ° C/100 bar)
1 ABB gas turbine GT 10B 25 MW
1 ABB steam turbine V40 AHH 24 MW
Electricity generated annually 170 million
Kilowatt hours (170 Gwh)
Corresponds to consumption of 48,500 households
Heating capacitors: 80 MW
District heating generated annually 280 million
Kilowatt hours (280 Gwh)
Corresponds to consumption of 23,000 households
GT/AHK: Approx. 5,100 h
BKS/DT: Approx. 8,200 h
(MW = output in megawatts as nominal output)
Combined heat and power is the simultaneous generation of electrical power and useful heat. The advantage of this technology is the particularly high utilization of the energy stored in the fuel. Machines for power generation, which are used to drive generators, can only use around 30 … 40% of the energy due to physics. The rest is lost in traditional electricity generation. In these power plants, the loss is easily recognizable by the steam rising above the cooling towers. In the Frankfurt (Oder) thermal power plant, this energy is used to generate hot water and as district heating for heating apartments, offices and shops.
Only about 2/3 of the fuel is needed for the combined generation of heat and power compared with separate generation of electricity in a large power plant and heat in a separate lignite-fired power plant where about 65% of the energy is lost. This is also the case with a steam boiler, even if it runs on natural gas. This is why many experts see combined heat and power as an important component in reducing greenhouse gas (CO2) emissions in the future. With a new law to promote such systems (CHP law), the legislature has created an important prerequisite for the further expansion of combined heat and power and for district heating networks – as the basis of this technology. That is why we are also working harder to expand the heat supply in Frankfurt (Oder). The emission of CO2 in the Frankfurt (Oder) thermal plant averages only 440 g/kWh. In comparison, the average output of all German energy generation (2009) is around 620 g/kWh. A conventional lignite power plant even emits more than 1100 g/KWh. The Frankfurt (Oder) combined heat and power plant relieves the environment by 30,600 tons of CO2 annually. The amount of CO2 saved corresponds to the emissions of 13,116 Golf class cars (10,000 km/year mileage). In order to achieve the same CO2 saving effect, one would have to equip 345,000 m² – more than 48 soccer fields with solar cells, for example. (1000 kWh/m² and year of solar radiation, efficiency 15%).
When it comes to other pollutants, too, our thermal power station is ahead of the curve. Thanks to the modern burner technology, coupled with the flue gas desulferization and dust filter system, the emissions from the power plant are far below the legal limit values. For example, the emission of sulfur dioxide is only a third of the legal limit.
Around the clock, day after day, the combined heat and power plant, together with the top-of-the-range heating plant, generates heating water and electricity. This is only possible with the latest technology and a high degree of automation. But no technology works without people. In addition to our employees in the control room, a team consisting of mechanics and automation specialists ensures that wearing parts are changed in good time and faults rectified. Once a year the power plant is completely decommissioned and subjected to a comprehensive overhaul. A annual inspection of the safety technology by the TÜV also takes place. During this time, the Nord Heizwerk supplies our customers with district heating. Our employees plan the entire revision, procure the necessary replacement parts and commission specialist companies. In our chemical laboratory, important process values are constantly monitored and controlled, for example the purity of the water used in the water-steam cycle plays an important role in the service life of the boiler and turbines. Other focal points are the marketing of the electricity generated, for example on the Leipzig electricity exchange, the monitoring of compliance with official requirements and the management of energy supplies.