sbc introduction to co gen
DESCRIPTION
This presentation is an introduction to the concepts of co-generation and tri-generation. Specific focus is put on case studies in Australia.TRANSCRIPT
CTI, 20 June 2011
Co-gen/CHP & Tri-gen Supply-Side Efficiency
Sustainable Business Consulting Pty LtdLevel 32, 101 Miller Street, North Sydney 2060P: 1300 102 195 | F: +61 2 8079 6101www.sustainablebizconsulting.com.au ACN 140 233 932 | ABN 46 506 219 241
Accredited by the NSW Government – On the panel of preferred suppliers
Inputs and Outputs
The Flow of Energy
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That much input
That much useful output
INPU
TS
OU
TP
UT
AutomotiveDiesel Oil
560 kL ( 2,016 GJ )
Waste Heat 1,649
GJ
Engine Losses1,258 GJ
(Friction, Noise, Vibration)
Standby / Idle347 GJ
Hydraulics / Pneumatics 44 GJ
LOSSES
Wallaby Downs Mining OperationOre Haulage Surface Storage to ROM
Sanki Diagram - (Simplified Energy Flows)
Driveline Losses113 GJ
Aerodynamic Drag 52 GJ
Rolling Resistance 85 GJ
Inertia,(Acceleration Braking)
117 GJ
UsefulEnergy 117 GJ
OperatingPractices
Opportunity
TechnologyOpportunity
Mining operation example – energy is being used inefficiently
Out of all this input…
… we only get this much useful energy
Making the Energy Input Smaller…
This presentation will focus on Co-gen and Tri-gen
…Supply-side Efficiency
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Power and heat generation
Traditional
By-product = heat
Sep. fuels for power & heat prod.
Centralised
Co-gen
Heat is captured
for heating
Single fuel source
Distributed
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Traditional versus Co-gen (= CHP)
Coal-fired power stations typically only convert 30-40 % of their fuel energy into electricity
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Example: District Heating
Co-gen is Not New
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Example for district heating – New York City
Approximately 30% of the steam system’s installed capacity and 50% of the annual steam generated comes from co-generation The district heating system takes steam and carries it under the streets of Manhattan to heat, cool, or supply power to high rise buildings and businesses.
Fuels Used in Co-gen
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Co-gen can use a variety of fuels
No oil in co-gen3 Most common:
Small and Large Scale
What Does a Co-gen Plant Look Like?
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Co-gen: Industrial application
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Co-gen example at hotel
Luxury resort utilises cogeneration to provide power and hot water to residents and laundry services
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Rice husk co-gen plant
Co/Tri-gen in Australia
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Coopers brewery cogeneration project
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Coopers video on co-gen
http://www.youtube.com/v/psSaSxrvrWY&hl=en_GB&fs=1
Applicability and Benefits
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Applicability
Organisation has need for both power and heat/steam Load patterns of both ideally stableLong operating hoursPrice of grid is highOrganisation needs reliable power supplyCost savingsLower emissions are needed (lower carbon footprint, better NABERS rating, etc.)
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Benefits
Reduced energy billsAdditional profit from selling surplus energy back to the gridIncreased security of energy supply (blackouts, brownouts,…)No intermittency issuesLess carbon emittedMuch more efficientLess transmission and distribution lossesLess need for centralised power generationLess need for fuel
Generation of Electricity, Heat, and Coolth
Tri-gen
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Tri-gen
Electricity, heat, and coolthHeat is used in absorption chillers to create cooling2008: NAB uses a tri-gen plant to power and cool its data centre in Melbourne
20,000 t of carbon saved annuallyMeans NAB can spend less on carbon offsets (carbon neutrality!)Plant was pitched on a 5 year ROI, now shorter due to rise in electricity prices
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Australia’s first tri-generation precinct for commercial buildings
Investa Property Group and Cogent, a subsidiary of Origin have established a tri-generation facility at Coca-Cola PlaceTri-gen supplies electricity, hot water and chilled water to the base buildingSurplus energy is exported via Ausgrid’s electricity distribution networkBenefits are shared with another Investa building (Deutsche Bank Place) through a virtual private energy network
COCA-COLA PLACE 40 MOUNT STREET NORTH SYDNEY
DEUTSCHE BANK PLACE 126 PHILLIP STREETSYDNEY
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Tri-gen at 101 Miller Street, North Sydney
Sustainable Business Consulting’s office is in the 101 Miller Street Building
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Tri-generation in manufacturing
Tri-gen plant installed at Blackmore’s headquarters in WarriewoodPlate heat exchangers provide heating for the building space, lap pool and production heatingAbsorption chillers and heat exchangers fully integrated into the building heating, chilled and condenser water systemsPlant operates automatically during the peak and shoulder demand periods or during grid outages for emergency backupPlant supplies 772 kW peak electrical at 0.8 power factor
Microgeneration
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Microgeneration at home
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Microgeneration – case study: Bluegen
BlueGen™’s maximum output is 2kW of electricity, with typical output being 1.5kW (good fit for the average home)The unit is as big as a dishwasherOperating on natural gas, BlueGen™ delivers a 60 % electrical efficiencyBlueGen™ can recover heat from the fuel cell for hot water - increases the total efficiency up to 85 %
Co-gen on the MAC curve
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Marginal Abatement Cost Curve (for the USA)
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Australian MAC
It’s below the curve, so let’s do more of it!
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