Fourth Wärtsilä BioPower plant for Swedish district heating

Wärtsilä Corporation, Trade press release 2 September 2005 at 13:00 UTC+2

In July 2005 Vattenfall chose Wärtsilä for an approx. EUR 11 million turnkey contract to supply a biomass-fuelled combined heat and power plant to serve the community of Motala in Sweden. It will have a thermal output of 17.5 MWth for district heating, and an electrical output of 3.7 MWe.

The plant is due to be fully operational in September 2006 and in commercial operation before the end of 2006. Motala is on the shores of Lake Vättern in southern Sweden, and has a population of about 30,000 people.

The turnkey contract with Wärtsilä will comprise a Wärtsilä BioPower BP5 plant which will burn wood waste from the local forestry industry. It will deliver hot water to the district heating network of Motala. The electricity generated will be exported to the Swedish grid.

Wärtsilä’s biomass-fuelled plants are clean and efficient. They are a practical solution for the need for renewable energy supplies with minimum environmental impact. They incorporate patented Wärtsilä BioGrate combustion technology to burn biofuels with high combustion efficiency and low NOx and CO emissions.

The BioPower plant operates on a closed steam-feed water system separate from the district heating water system. Steam is generated in an efficient water-tube boiler, and supplied to a back-pressure steam turbine driving an alternator. Turbine exhaust steam then heats the district heating water, and the condensate is returned as feed water to the boiler.

BioPower plants are highly modular, being based on well-proven standardised components with a conservative design approach. The plants can thus be delivered and installed quickly. Their proven technology results in a reliable, durable plant. They are also highly automated, enabling unmanned operation.

This is the third combined heat and power installation contracted in Sweden using Wärtsilä BioPower’s BP5 plant. The other BP5 plants are in Trollhättan and Mark. In Tranås there is a biomass-fuelled plant of the BP2 type.

For more information on Wärtsilä, visit the website at or contact:
Yvonne Rönn
Public Relations Manager, Power Plants
Wärtsilä Finland Oy
Direct tel: +358 10 709 1459
Direct fax: +358 10 709 1425