Type of CHP system: Grate fired boiler
Plant owner: NUON
Commissioned: (reconstructed):1999 (2000)
Status of plant: Commercial
The construction period was delayed for 1.5 year due to bankrupcy of the main contractors. The installation was completed by own management.
Power generation: Steam turbine
Main fuel: Wood chips
The plant will consume 15,000 – 25,000 ton clean waste wood per year with 45% moisture. There are no facilities for any fuel preparation or pretreatment, and is also not allowed.
Nominal capacities & efficiencies:
Thermal input, biomass & waste: 8 MW
Total thermal input, incl. fossil fuels: 8 MW
Gross electrical output: 1,7 MWe
Net electrical output: 1,5 MWe
Heat output: 6,5 MJ/s
Electrical efficiency, gross: 20 %
Electrical efficiency, net: 20 %
Overall efficiency, gross: 85 %
Power to heat ratio: 0,25
How is plant controlled:
By heat demand during winter
By E-demand during summer
Heat backup: Natural gas boiler of 13 MWt
Heat usage: Heating only
Energy usage: 3,000 households
District heat coverage (% of total demand in DH network): 100 %
DH inlet temperature: 95 °C
DH return temperature: 55°C
Heat storage size: Volume of the district heating system m3
Hours of full load that the heat storage can meet: n.a.
Wood chips are transported to the site by trucks and dumped into a cellar provided with a walking floor. From here the fuel is transported to the combustor by means of a conveyor. The fuel storage volume is enough for three days operation.
Waste water: Cleaning before disposal to pubic sewage system
Ash discharge: Road construction material
Plant description: Grate fired boiler with steam tubine for clean wood residues
Emission regulation by province
Fuel feeding system: With conveyor to bunker with 3 days storage capacity
Boiler: 2-track heat-pipe boiler
Turbine: High and low pressure turbine, manufactured by KKK
Steam pressure 32 bar,
steam temperature 400 oC,
Steam production 8,5 t/hr
Flue gas cleaning: The flue gas cleaning consist of two multi-cyclones and a electrostatic precipitator.
Cooling system: Cooling tower
Low pressure turbine is only used in Summer
Electricity sale info: Fixed
Total capital cost: € 12,000,000
Data collected and quality assured by: Biomass Technology Group BV.
Contact person: Harrie Knoef