SBC Introduction To Co Gen

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

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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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