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October 03, 2013
Re-Energizing our Cities
From district to specific
Dave Ramslie & Gerry Faubert
Integral Group
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A Point in History…
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High Performance Urban Buildings
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Energy and GHG savings at scale
Fuel switch on existing systems = 35-85,000 t
New brownfield DE systems = 7-15,000 t
Near net-zero building = 200t
Deep green retrofit = 50-75t
LEED Gold Building = 30-50t
Typical retrofit = 30-40t
Retro-commissioning = 20-30t
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Going District Scale
How do we:
Build new cost effective systems?
Have competitive utility rates?
Connect existing loads?
With natural gas at an all time low?
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Use Existing Infrastructure:
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Conversion of DFPS to Ambient DES
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Stage 1 – B&H Site Connected to ATDFPS
Convert DFPS into Ambient Temp DES or “ATDFPS”
Build Central Plant on adjacent site
Connect B&H to ATDFPS
B&H peak heating demand 2.5MW
ATDFPS intrinsic geo-exchange heating capacity 1.6MW with heat pump
Supplemental heating by condensing Nat. Gas boilers
ATDFPS
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“Ambient Loop” District Energy Concept
DFPS converted into “Ambient Temperature” (5 -15C) district energy system serving majority of Downtown
New Energy Centre pump station converts existing stagnant DFPS loop into thermal distribution system
Combined with distributed building level heat pump H&C plants
Combined with distributed “low-grade” thermal energy sources
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DFPS/Ambient Loop DES Concept Schematic
DFPS / AMBIENT LOOP DES 600mm DIAMETER
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Ambient Loop Demand & Temperature Profile
-4000
-3000
-2000
-1000
0
1000
2000
3000
4000
0
2
4
6
8
10
12
14
16
18
20
Fri,01/Jan
Tue,26/Jan
Sat,20/Feb
Wed,17/Mar
Sun,11/Apr
Thu,06/Ma
y
Mon,31/Ma
y
Fri,25/Jun
Tue,20/Jul
Sat,14/Aug
Wed,08/Sep
Sun,03/Oct
Thu,28/Oct
Mon,22/Nov
Fri,17/Dec
De
grre
C
Ambient Loop Demand & Temperature Profile at Phase 1
Net heat extraction/ heat rejection from/ into Ambient Loop at Phase 1
Ambient Loop temperature profile with 1.5 MW low-grade heat source SHR @ 8C dT, 45 l/s or Ocean Loop @ 4C dT, 90 l/s
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Performance Engineering – Canmet Lab@ MIP
Innovative Partnership
Hybrid DES
Geoexchange
Solar Thermal & PV
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Making These Systems Work
District Energy
Load Certainty
Load Density
Load Diversity
Patient Capital
Supportive Policy
Supportive Civic
Government
Developer “Buy-In”
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Policy Considerations
Mandatory Connection Areas?
“DE Ready” requirements
DE feasibility requirements
DE “Franchise Areas”
Low Carbon Bridging Strategies
Green Building Policy
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SEFC Neighbourhood Energy Utility
Mandatory Connection
Green Building Policy Amendments
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The River District
Low Carbon Bridging Strategies
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Cambie Street Corridor
“DE Ready” requirements
DE feasibility requirements
DE “Franchise Areas”
Low Carbon Bridging Strategies
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Central Heat Biomass Conversion
Green Building Policy Amendments
Mandatory Connection requirements