Type of CHP system: Gasification
Plant owner: Brook Hall Estate
Commissioned: (reconstructed):1997 (2002)
Status of plant: Demonstration
Brook Hall Estate constructed the gasifier, with the assistance of Rural Generation Ltd. All of the plant is purpose designed with the exception of the IVECO diesel engine, which is a standard item.
Power generation: Choose from list
The producer gas is fed into the air intake of engine and on turbine it is pressurised
Main fuel: Wood chips
300 tonnes willow chips consumption per year, typical moisture content is 8-10% plus 10,000 liters of diesel fuel (5 liters per hour of operation, 2000 oper. hours)
Nominal capacities & efficiencies:
Thermal input, biomass & waste: 0,43 MW
Total thermal input, incl. fossil fuels: 0,5 MW
Gross electrical output: 0,12 MWe
Net electrical output: 0,096 MWe
Heat output: 0,32 MJ/s
Electrical efficiency, gross: 32 %
Electrical efficiency, net: 28 %
Overall efficiency, gross: 72 %
Gasifier produces 180 m3 per hour
Average diesel consumption is 18%
How is plant controlled: By electricity demand
Heat backup: Heat recovery from generator using two heat exchangers W/W and G/W and hot water storage tank
Heat usage: Heating only
Energy usage: All electricity is exported to the National Grid. Heat is used on site for space heating of buildings, grain drying and wood chip drying
District heat coverage (% of total demand in DH network): 75 %
DH inlet temperature: 70°C °C
DH return temperature: 62°C°C
Heat storage size: 9m³ tank m3
Hours of full load that the heat storage can meet: 6 hours
Fuel storage: Batch fed system containing 12 m3 approx. 18hrs operation
Waste water: 1.2 liter per hour stubble ground
Ash discharge: Spread on stubble ground
This is a wood fuelled gasifier that runs mainly on willow chip. The gasifier delivers gas to the air intake of a standard diesel engine. The diesel engine typically runs on 18% diesel and 82% wood gas. The diesel engine is connected directly to a generator. Heat is recovered from the engine jacket and from the exhaust. The gasifier can also connected to a gas turbine, which is also situated on site. This has been installed as a “proof of concept” demonstrator and the gas turbine does not have a power generation facility.
Fuel feeding system: Batch
Gasifier: Pressurised down draft
Gas cleaning: Cyclones and scrubbing tower.
Engine: IVECO 8210i 02 diesel engine
Flue gas cleaning: not applicable
Staff: Plant only operates at daytime (10 hr/day). 2hrs per day maintenance.
Electricity sale info: SATOD – Season and time of day tariff.
Total capital cost: € 210,000
Data collected and quality assured by: Biomass Technology Group BV.
Contact person: Harrie Knoef