Type of CHP system: CFB boiler
Plant owner: Karlstads Energi AB own the plant. Karlstad Energi AB is owned by Karlstad Municipality
Status of plant: Commercial
The boiler is delivered by Ahström (Foster Wheeler). Steam turbine by ABB Stal, which also included renovation because the turbine was used. Flue gas condensation delivered by Fagersta Eneregtics.
Power generation: Steam turbine
Main fuel: Wood chips
A mixture of forest residual, saw dust, bark, dry wood chips and wood logs.
Nominal capacities & efficiencies:
Thermal input, biomass & waste: 90 MW
Total thermal input, incl. fossil fuels: 100 MW
Gross electrical output: 20 MWe
Net electrical output: 18 MWe
Heat output: 80 MJ/s
Electrical efficiency, gross: 20 %
Electrical efficiency, net: 18 %
Overall efficiency, gross: 105 %
Nominal thermal input depends on the moisture content. Flue gas condenser on around 20 MW. According to Mr Peter Lind is the Power to heat ratio 0,34 and the Nominal overall efficienct 105
How is plant controlled: The plants is controlled by the heat demand.
Heat backup: Oil boiler as peak load and back-up
Heat usage: Heating only
Energy usage: The energy customers are for example households, industry, and municipality. Own power consumption include operation of the district heating pumps
District heat coverage (% of total demand in DH network): 55 %
DH inlet temperature: 80-120 °C
DH return temperature: 42-65°C
Heat storage size: 2500 m3
Hours of full load that the heat storage can meet: < 1 huor on full load Fuel storage: It is possible to storage fuel for one month
Waste water: It is possible to recover heat from the water. PH- adjustment of the condensat
Ash discharge: Recycling to the forest
Fuel feeding system:
The fuel is delivered to a storage. The fuel is then sieved and the fuel which has to big size is chipped. Scrape feeding to the intermediate storage indoors( storage capacity of three days). Rubber belts to boiler house. Stoker to the boiler, conveyer, scrape, cell feeder
Turbine: an old turbine delivered by ABB Stal
Steam data: 74 bar, 505 degree Celcius, 101 tons/hr
Flue gas cleaning: Elctrostatic precipitator, SNCR
500 °C, 65 bar before the turbine, <1 bar around 80°C after the condenser. Staff: The employees also run a waste incineration plant. Total around 50 employees. Around 25 at daytime. 4 at night.
Electricity sale info: Electricity is sold to customer all over Sweden
Total capital cost: € 66,700,000
Data collected and quality assured by: Swedish Biomass Association.
Contact person: Johan Vinterbäck