KIEL coastal power station

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Coastal power plant
View of the coastal power plant
View of the coastal power plant
location
KIEL coastal power plant (Schleswig-Holstein)
KIEL coastal power station
Coordinates 54 ° 20 '29 "  N , 10 ° 10' 41"  E Coordinates: 54 ° 20 '29 "  N , 10 ° 10' 41"  E
country Germany
Data
Type Gas engine power plant
Primary energy Fossil energy
fuel natural gas
power 190 MW electrical, 192 MW thermal
owner Stadtwerke Kiel AG
operator Stadtwerke Kiel AG
Project start 2012
Start of operations November 2019
Chimney height 72 m
was standing November 2019
f2

The coastal power plant is a combined heat and power operated, modular gas engine - combined heat and power plant in Kiel . It has 20 individually controllable gas engines, an electrical output of 190 MW and a thermal output of 192 MW, and it supplies both electrical energy and district heating for around 70,000 customers. It was built by Kraftanlagen München on behalf of Stadtwerke Kiel and has replaced the joint power station in Kiel since November 2019 .

history

Planning began in 2007. The location decision was made at the end of 2012. In April 2013, the municipal utilities decided not to build a conventional gas-fired power plant, but to build a modular gas-engine power plant. The final investment decision was made in November 2016. The construction costs were estimated at 290 million euros.

The engines reached the power plant site in early 2018 and were then gradually installed and put into trial operation. There were delays in the construction, so that the commissioning originally planned for April 2018 had to be postponed by a year. To bridge this period, the joint power station in Kiel was operated one year longer than planned.

On August 1, 2019, it became known that the dry coolers mounted on the machine hall could not guarantee sufficient cooling for the engines on hot days. Because it can take years before a new cooling concept is installed, Stadtwerke Kiel and its general contractor Kraftanlagen München GmbH developed an interim solution.

On November 28, 2019, the system was accepted by the Stadtwerke Kiel and started commercial operation.

technology

The power plant has a total of 20 natural gas-fired generator sets of the General Electric Jenbacher J920 FleXtra type, which are grouped in two machine halls with two engine groups each, each with a chimney. The generator sets each consist of a 20-cylinder gas engine, a two-stage turbocharger and an electric generator. The generator sets can be regulated independently of one another and can be run up from standstill to rated power within 5 minutes . Under full load, the generator sets had an output of 9.5 MW el and 9.6 MW th . The efficiency of the motors is 45% electrical, and 45% heat can be extracted so that the fuel efficiency is up to 90%. In contrast, the coal-fired community power plant needed at least 4 hours to ramp up to rated output. Due to the higher efficiency and controllability of the coastal power plant as well as the switch to the lower-emission fuel natural gas, a decrease in carbon dioxide emissions of 70% is expected. The electrical energy is fed into the 110 kV distribution network of Stadtwerke Kiel Netz GmbH.

The new power plant is supplemented by a district heating storage system and a power-to-heat system, which enable additional flexibility in operation by decoupling electricity generation and heat supply. The heat storage tank has a capacity of 30,000 cubic meters of water and is able to store 1500 MWh of thermal energy, with which the district heating network in Kiel can be supplied for up to 8 hours independently of the power plant. The electrode boiler has a thermal output of 35 MW and can be used in times of high feed-in of renewable energies to absorb excess electricity and generate heat at the same time.

Operating mode

District heating storage facility (right), next to it on the left the construction site of the power plant
Coastal power plant on the left, and the older community power plant in Kiel on the right

With the combination of 20 individually controllable gas engines, heat storage and power-to-heat system, the power plant is able to react flexibly to different market situations. The gas engines in connection with the heat accumulator can be operated both with electricity and heat, while the combination of heat accumulator and power-to-heat system also enables the district heating network to be produced or supplied with heat without the use of gas engines. For example, on cold winter days with little wind, the gas engines can supply electricity and heat. On the other hand, on winter days with high wind power feed-in and correspondingly low power demand, the gas engines can stand still, while the power-to-heat boiler can draw regenerative power surpluses from the power grid in order to use it in the heating sector (so-called sector coupling ). In this case, the heat supply is ensured via the power-to-heat system and the heat storage.

The short start-up time of approx. 5 minutes from standstill to rated output also enables use as a peak load power plant and thus the provision of control power . If only electricity is required, but no heat or only little heat, such as in summer, then the heat can be temporarily stored in the heat storage tank and support the domestic hot water supply in summer. However, the district heating base load is provided by a waste incineration plant in summer .

See also

Web links

Commons : Coastal Power Plant Kiel  - Collection of images, videos and audio files

Individual evidence

  1. a b The most modern system in Europe . In: Schleswig-Holsteinischer Zeitungsverlag , November 11, 2016. Accessed March 3, 2019.
  2. a b Coastal power plant is back on track . In: Kieler Nachrichten , July 30, 2018. Retrieved March 2, 2019.
  3. ndr.de As of: December 7th, 2019 6:00 am - NDR 1 Welle Nord - This is how the new Kiel coastal power plant works
  4. a b lan: Gas engine combined heat and power plant Kiel: The engines of the coastal power plant are complete | shz.de. Retrieved April 5, 2019 .
  5. The cooler has to go down again. Retrieved August 13, 2019 .
  6. Kiel's new power plant is supposed to save one million tons of CO2 . In: Kieler Nachrichten , November 29, 2019. Retrieved November 29, 2019.
  7. GE Power: More innovation, power & efficiency J920FleXtra brochure . Ed .: GE Power. S. 3 .
  8. Jenbacher J920 FleXtra Gas Engine | Products - INNIO.com. Retrieved April 12, 2019 .
  9. GE Power: J920 FLEXtra in Stapelfeld, Schleswig-Holstein . 2015.