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Canadian Home Builders Association Drake Landing Solar Community May 28, 2010. Drake Landing Solar Community Okotoks, Alberta. Presentation Outline: Technology Concept Implementation Challenges Latest Performance Update Replication Discussions. Purpose of Project:
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Drake Landing Solar Community May 28, 2010
May – September 100%
April – September 96%
Borehole thermal energy storage (BTES)
Aquifer thermal energy storage (ATES)
Okotoks, Alberta, Canada
BTES = borehole thermal energy storage
Electronically commutated motors
High-efficiency fan coils
Integrated heat recovery ventilators (HRV)
Fully operational since July 1, 2007;
Energy system is working well and meeting expectations.
Newsletter issued Sept 2009
Live performance report web site May 2010
Calls from all different countries for site tours and visits;
People constantly asking if there are more homes for sell;
Homebuyers chose Okotoks over Calgary because of DLSC project;
Homebuilders continuing the green building path (Sterling Homes, Lifestyle Homes);
Residents live in a close-knit community (BBQs, summer solstice party)
- Dawn Heffernan, Environment and Sustainability Coordinator
Human resources and knowledge
Economies of Scale
250 – 500 units or larger
Integrated Energy Systems for Communities
Integration with heat pump?
Requires less collectors, larger borehole spacing, larger borehole field area, requires heat pump, operating at lower storage temperature
GHG impact may be higher or lower depending on local generation mix
Development Density and Land Use
Better opportunities for higher density and mixed development
Buildings with cooling loads
– even better opportunity
Further reduce the number of collectors
May work well with unglazed collectors, roof membrane or asphalt collectors (lower cost than glazed collectors)
Key is to maintain energy balance in the underground thermal energy exchange medium
Several studies with ATES with solar or waste heat from biogas CHP