Denmark's largest power station converts to wood pellets

Maria Church
December 14, 2016
Written by
Denmark's largest power station converts to wood pellets
Image source: www.dongenergy.com
Dec. 14, 2016 - Avedøre Power Station, the largest power station in Denmark, is now producing electricity from wood pellets and straw.

The CHP plant's conversion happened over 18 months – part of a heat agreement between the Danish energy companies 'Vestegnens Kraftvarmeselskab' (VEKS) and DONG Energy. The power station will provide green district heating to VEKS' customers in the Greater Copenhagen area.

"Following the conversion of unit 1 at Avedøre Power Station, we can produce heat for more than 215,000 Danish households in the Greater Copenhagen area without using coal or gas," Thomas Dalsgaard, executive vice-president for DONG Energy, said in a news release. "The conversion is a major contribution to achieving a green district heating system in the Greater Copenhagen area as well as a green electricity system, supplementing solar and wind power," says

Avedøre Power Station expects to reduce its CO2 emissions by about 500,000 tonnes per year, which is about the annual emissions from 255,000 cars.

"Choosing the right levers to curb the ongoing CO2 emissions and thereby global warming is a complex task. However, using biomass at Avedøre Power Station's two units is a huge step towards achieving VEKS' goal of supplying fossil fuel-free district heating in 2025. We’ve made a difference," Steen Christiansen, chairman of VEKS, said in the release.

Denmark's Studstrup Power Station, near Aarhus, made a similiar transition from coal in October.

"We’re reducing our annual coal consumption at Avedøre Power Station by around 160,000 tonnes. This is very good for the climate and in line with the conversion of our power stations, which has been ongoing for several years," Dalsgaard said.

Avedøre Power Station is expected to produce district heating to approximately 215,000 homes in Copenhagen, and electricity equal to the annual consumption of more than 600,000 households annually.

Details about Avedøre Power Station
  • Avedøre Power Station has two units. Unit 1 now uses wood pellets as fuel, but is still able to use coal. Unit 2 is a multi-fuel plant consisting of a main boiler, which primarily uses wood pellets as fuel, a straw-fired boiler and two gas turbines.
  • Avedøre Power Station unit 1 was built in 1990 and used coal as fuel until recently. The unit is now able to produce electricity and heat using only wood pellets. The unit's capacity using biomass is 254MW electricity and 359MWth heat.
  • Avedøre Power Station unit 2 was built in 2002 and was able to use biomass from the outset. The quantity of biomass has gradually been increased over the years. Today, the unit is able to produce electricity and heat exclusively using wood pellets in the main boiler and straw in the bio boiler. The unit's capacity using biomass is 394MW electricity and 497MWth heat.
  • To ensure we only use sustainable wood pellets, DONG Energy only does business with suppliers who comply with the criteria set out in the Danish industry agreement on sustainable wooden biomass. This means that there is continuous reforestation, and that the biodiversity is protected.

 

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