Sustainable Energy Ireland
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Transcript of Sustainable Energy Ireland
Sustainable Energy Sustainable Energy IrelandIreland
Exploiting the Resource
David Raubenheimer
March 2004
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Fibrowatt OverviewFibrowatt Overview
• Developer owner operator• Power from agricultural residues• 65 MW operational• 2,650,000 MWh produced, 3.7
million tonnes fuel• Overview of Fibrowatt’s plants
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NUTRIENTS
CARBON (CO2)
Flue Gases
Ash
ELECTRICITY
EN
ER
GY
BIOMASSBEDDING
& FEED
MANURE
The Carbon CycleThe Carbon Cycle
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Power StationsPower Stations
Power Station
Company MW Location
Eye (World’s first)
Fibropower 12.7MW Suffolk
Glanford Fibrogen 13.5MW N Lincs
Thetford Fibrothetford 38.5MW Norfolk
FibropowerFibropower
Commissioned Jul 1992 Design output 12.7MW
Burns 150,000 t/yr of poultry litter & other biomass
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Fibropower - Operational Fibropower - Operational ExperienceExperience
• Development of know-how• Fuel characterisation difficult• Biomass knowledge fragmented• No available standards• Now runs exceptionally well• New fuels trialled
FibrogenFibrogen
Commissioned Nov 1993Design output 13.5MW
3-5 yr Govt contract for 85,000 t/yr of meat & bone meal
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FibrogenFibrogen
• Commercially similar to Fibropower
• 8% larger• New fuel handling – design trials• Technically very successful• Achieves 90 – 100% availability• Converted to burn MBM
FibrothetfordFibrothetford
Commissioned 1998 Design output 38.5MWBurns 460,000 t/yr of poultry litter & other biomass
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FibrothetfordFibrothetford
• Significant scale up – 3x• New fuel storage – design trial• Environmentally sensitive site• Environmental standards changed• Construction contractors more
cautious• Scale up caused technical
problems• Now running well
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How it Works – How it Works – in the plantin the plant
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Technology – Current Technology – Current PlantsPlants
Fibropower Fibrogen Fibrothetford
Fuel Handling Cranes Cranes Augers/Conveyors
Fuel Feeding Mass Pneumatic Air Distributor
Grate Reciprocating Chain Grate Chain Grate
Boiler ‘Folded’ ‘Folded’ Bi-Drum
Balance Conventional Conventional Conventional – Ash more complex
Emissions Control
Electrostatic Precipitator
Bag Filter/
Semi dry scrubber
Bag Filter/
Dry line injection
Steam Conditions - 65 Bar, 450°C to 475°C – all plants
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Fuel Pits at FibrogenFuel Pits at Fibrogen
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Thetford Fuel HallThetford Fuel Hall
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Fuel Trucks UnloadingFuel Trucks Unloading
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Fibrogen - MBM Fibrogen - MBM ConversionConversion
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Inside Inside the the
BoilerBoiler
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Technology - ResultsTechnology - Results
• Poultry litter burns very well• Characterisation is difficult• Handling needs care• Combustion performance• Certain arrangements excluded
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Technologies ReviewedTechnologies Reviewed
• Have reviewed a number• Stepwise development strategy• Fluidised Bed• Gasification• Digestion• High tech may be
counterproductive
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What a Project NeedsWhat a Project Needs
• Available, contactable & characterised fuel supply
• Affordable electrical connection• €4+ million to develop• 2 - 5 yrs development, 2 yrs
construction• Incentivised construction
contractors• Available land and local support
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What a Project Needs (2)What a Project Needs (2)
• Power Purchase Agreement– Bankable
– Long term (construction +15 years)
– Technology specific
• Ash fertiliser sales routes• Abundant political support
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SummarySummary
• 2,650,000 MWh• 3,700,000 tonnes of fuel • Significant teething problems
overcome• Structure new market with care• Particularly the Power Sale
arrangements• Consistent and broad political
support