1Spring 2003Spring 2003

A Unique Engineered SolutionA Unique Engineered Solution

enenwavewaveDeep Lake Water CoolingDeep Lake Water Cooling

A Photo Journey Of The Construction of The A Photo Journey Of The Construction of The World’s Largest World’s Largest

Lake-Source Cooling SystemLake-Source Cooling System

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DLWC SpecificationsDLWC Specifications

• 62,000+ tons mechanical 62,000+ tons mechanical capacitycapacity

• 75,000 tons with diversified load75,000 tons with diversified load• Equivalent to ~ 65 MWEquivalent to ~ 65 MW• Displacing 40 million+ kWh/yrDisplacing 40 million+ kWh/yr• ~ 3.2 million sq.ft. or 100 ~ 3.2 million sq.ft. or 100

buildings building coolingbuildings building cooling

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Environmental Benefits to TorontoEnvironmental Benefits to Toronto

• 80,000+ tons GHG displaced annually80,000+ tons GHG displaced annually– C02– SOX– NOX– Particulate

• Taking 15,000 vehicles off the roadTaking 15,000 vehicles off the road– A line of cars from T.O. to Gravenhurst

• 40,000+ kg of CFCs displaced40,000+ kg of CFCs displaced

• Construction started June 2002Construction started June 2002• Completed Summer 2004Completed Summer 2004

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Ontario Electricity ForecastOntario Electricity Forecast

18,000

19,000

20,000

21,000

22,000

23,000

24,000

25,000

26,000

1990 1992 1994 1996 1998 2000 2002

Summer PeakWinter Peak

Source:IMO

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System Overview – Deep Lake CoolingSystem Overview – Deep Lake Cooling

•$175 Million asset$175 Million asset•Joint Joint infrastructureinfrastructure•Replacing City of Replacing City of Toronto drinking Toronto drinking water intake water intake systemsystem•Borrowing the Borrowing the WaterWater•Energy Transfer Energy Transfer StationStation• Distribution LoopDistribution Loop•Construction Construction started:started:

• June 2002June 2002•Completion:Completion:

• Summer 2004Summer 2004

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Schematically ….Schematically ….

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Deep Lake Water CoolingDeep Lake Water CoolingService TerritoryService Territory

• Evaluate and Identify Evaluate and Identify prospectsprospects•Assist in analysis and cost Assist in analysis and cost comparisonscomparisons• Develop specificationsDevelop specifications• Develop projectDevelop project

An Ideal Engineered SolutionAn Ideal Engineered SolutionFor Many Downtown For Many Downtown buildingsbuildings

Enwave can help:Enwave can help:

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Redundancy …. Engineered for 100% UptimeRedundancy …. Engineered for 100% Uptime

•Dual Feeders and Xformation to IFP and JSPSDual Feeders and Xformation to IFP and JSPS•Full back-up power to circulating pumpsFull back-up power to circulating pumps•Steam drive/absorption Chiller Plant - 12,400 TonsSteam drive/absorption Chiller Plant - 12,400 Tons•3 Water Intake Pipes3 Water Intake Pipes•Back-up pipesBack-up pipes•Alternate water supply from eastern plantAlternate water supply from eastern plant•N+1 redundancy – Firm ratingN+1 redundancy – Firm rating

•PumpsPumps•HXHX•Mechanical PlantMechanical Plant

•22oo distribution loop bored through rock below distribution loop bored through rock below other utility layers other utility layers

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Intake PipingIntake Piping

•83m down•5 km out •70,000 gpm•40C

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Lake-ology™Unlocking the Mysteries

of The Deep

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The Wonders of Bodies of WaterThe Wonders of Bodies of WaterThe Greek’s have a word for it …..The Greek’s have a word for it …..

• EpilimnionEpilimnion– Most sun radiation– Most living things

• MetalimnionMetalimnion– (Thermacline)– Density/temperature

• HypolimnionHypolimnion– Most dense– No convection– Constantly

regenerating

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Stratification conforms to basin shapeStratification conforms to basin shape

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Going Deep …..Going Deep …..

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The Launch of a Canadian Venture …The Launch of a Canadian Venture … WithWith International StatureInternational Stature

Worldwide Attention:• ASHRAE• I.D.E.A.• China• US• Greece• Denmark• Spain

““This technology…This technology…is going to be an exampleis going to be an example to the rest of the worldto the rest of the world”” Robert F. Kennedy Jr.Robert F. Kennedy Jr.Toronto, June 20, 2002Toronto, June 20, 2002

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Oxford Properties Group ShutsOff Chillers at

One University Avenue

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Step 1Enwave Chilled Water Plant

MTCC South

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Chilled Water Plant - MTCCChilled Water Plant - MTCC

• Design Intent: Decouple from electricityDesign Intent: Decouple from electricity• Commissioned in 1997Commissioned in 1997• 2 x 4700 Ton Centrifugal Chiller (Steam 2 x 4700 Ton Centrifugal Chiller (Steam

Driven)Driven)• 2 X 1500 Steam Absorption Chillers2 X 1500 Steam Absorption Chillers• 12,400 Tr Capacity12,400 Tr Capacity• Rated Firm at 7,700 tonsRated Firm at 7,700 tons

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Second 4,700 Ton Centrifugal PlacedSecond 4,700 Ton Centrifugal PlacedOctober 2002October 2002

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Piping and Placement of VesselsPiping and Placement of Vessels

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Construction of Energy Transfer Station

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Energy Transfer Station -JSPSEnergy Transfer Station -JSPS

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Energy Transfer Station -JSPSEnergy Transfer Station -JSPS

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Construction of Energy Transfer Loop

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Energy Transfer LoopEnergy Transfer Loop

Off-loading the Off-loading the beastbeast, a , a 64-ton tunnelling 64-ton tunnelling machinemachine

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Energy Transfer LoopEnergy Transfer Loop

Going Down!Going Down!

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Energy Transfer LoopEnergy Transfer Loop

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Energy Transfer Loop TunnelingEnergy Transfer Loop Tunneling

Tunneling at a rate of 10-20 Tunneling at a rate of 10-20 meters/daymeters/day

• Rock is cut and is paddled Rock is cut and is paddled back to buckets for deposit back to buckets for deposit into small train carsinto small train cars

• Tunnel Approximately 270m Tunnel Approximately 270m in lengthin length

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Energy Transfer Loop TunnelingEnergy Transfer Loop Tunneling

Supply and Return pipes Supply and Return pipes to be lowered into to be lowered into tunneltunnel

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Energy Transfer Loop TunnelingEnergy Transfer Loop Tunneling

Supply and Return pipes Supply and Return pipes to be lowered into to be lowered into tunneltunnel

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Energy Transfer Loop TunnelingEnergy Transfer Loop Tunneling

Supply and Return pipes Supply and Return pipes to be lowered into to be lowered into tunneltunnel

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Energy Transfer Loop TunnelingEnergy Transfer Loop Tunneling

Supply and Return pipes Supply and Return pipes to be lowered into to be lowered into tunneltunnel

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Fabrication of Intake Piping

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•15 km HDPE Piping•1.6 m dia.

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Enwave Enwave Pipe FabricationPipe Fabrication

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•Stored on the bay bottom•Floated and barged up to Toronto

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Deployment of (Near-shore)Intake Piping

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Pipe DeploymentPipe DeploymentPressurized Sections Floated into PositionPressurized Sections Floated into Position

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Pipe DeploymentPipe DeploymentShoreline DeploymentShoreline Deployment

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Pipe DeploymentPipe DeploymentEstablishing Line of Sight for Off-shore PlacementEstablishing Line of Sight for Off-shore Placement

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Deployment of (Off-Shore)

Intake Piping

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Enwave Enwave Pipe Deployment - Barges PreparePipe Deployment - Barges Prepare

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Pipe DeploymentPipe DeploymentPreparing To “Sink”Preparing To “Sink”

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Enwave Enwave Pipe Deployment - Positioning 1.5km SectionsPipe Deployment - Positioning 1.5km Sections

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Pipe DeploymentPipe DeploymentPositioning 1.5km SectionsPositioning 1.5km Sections

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Pipe DeploymentPipe DeploymentPreparing To “Sink”Preparing To “Sink”

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Pipe DeploymentPipe DeploymentPreparing To “Sink”Preparing To “Sink”

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Pipe DeploymentPipe DeploymentPreparing To “Sink”Preparing To “Sink”

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Three 5 km “legs” Comprise the Inlet SystemThree 5 km “legs” Comprise the Inlet System

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Deep Lake Water Cooling - A Tangible Step Towards Deep Lake Water Cooling - A Tangible Step Towards Sustainability for TorontoSustainability for Toronto