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www.dunsky.ca (514) 504-9030 | [email protected]
Lessons learned Green Energy Benny Farm
Alex Hill, MEng, LEED AP DUNSKY ENERGY CONSULTING
May 28, 2012
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DUNSKY OVERVIEW
SERVICES
Design and evaluation of programs, plans and policies
Strategic, regulatory and analytical support
New opportunities assessments
CLIENTS
Utilities
Government
Industry
Non-profits
(sample clients from among >100)
EXPERTISE
Energy Efficiency and Demand-Side Management
Renewable Energy and Emerging Technologies
Greenhouse Gas Reductions
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Outline
Introduction to Benny Farm
The Greening the Infrastructure at Benny Farm Project
Installation of the integrated energy systems
The challenges faced
Lessons learned
Other Impacts
Lessons applied
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A vision for a sustainable community Benny Farm Redevelopment EVBF, a community-owned
energy company
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Greening the Infrastructure at Benny Farm
Salvaging Buildings Conserving Energy and Water
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Renewable energy systems Ground exchange heat pump loops
Solar water heating and make-up air preheating
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Initial Optimism Award-winning design – Holcim Foundation
District energy company as a model for long term sustainability
Globe and Mail, September 2005
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The cold slap of reality
Innovative infrastructure faulty: needed redesign and rebuilding
Renovations and lowest cost contracting lead to significant deficiencies
Montreal Gazette, September 2007
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Impact on energy budgets
0
1,000,000
2,000,000
3,000,000
4,000,000
5,000,000
6,000,000
EE4 referencebuilding
EE4 modelresults
Realconsumption
Av
era
ge
an
nu
al
co
nsu
mp
tio
n (
MJ)
Chez Soi NDG Natural gas
Electricity
Disappointing results from compounded factors
Initial energy budget estimates over-promised compared to results
Overly-optimistic model
Failure of GSHP and Solar array
System integration and controls
Lower performing measures
Occupant behavior
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Manage the Risk and Return
New Building Institute, 2010
LEED building study results
Buildings completed to 2006
Overall positive results: 20-25% average energy savings
Scatter = risk
Most under performing are Gold-Platinum
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Avoid the scatter – reduce the risk
Formulate your successful recipe of DSM measures and EE equipment
Invest upfront AND in maintenance to keep projects affordable
Pull together specialised servicing team
LEED silver and basic level projects can perform best
Ensure adequate access to modelling and quality control UPFRONT
Improve access to qualified commissioning and post occupancy servicing
Encourage high efficiency, but put emphasis on envelope and proven equipment
Be prepared for contingency funding on energy bills
Avoid innovation overload – pick measures strategically
Commissioning from day one to post-occupancy
Plan for affordable housing as a service, not just a commodity
Size your contingencies appropriately to the level of complexity
PORTFOLIOS PROGRAMS & POLICIES PROJECTS
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How we solved our problems The district heating model was promising, but we required the right players
Accessed significant “rebuild” contingencies
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Other EVBF Benefits EVBF created new opportunities to improve life for the residents
EVBF project important to furthering knowledge about green building technology
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Applying the Learnings Coteau Vert and Un Toit Pour Tous
Cooperative 95 units
Non-profit Org 60 units
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Blending active and passive approaches
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More Lessons... Some envelope
improvement difficulties integrate in affordable housing
Commissioning Essential: In the development continuum M+M is weakest
Need a qualified central player to handle all systems in complex buildings
Rosemont combines some “winning” approaches: partial district heating with redundancies, hot water supply using central gas fired units
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Thank you... QUESTIONS?
Alex Hill, MEng, LEED AP DUNSKY ENERGY CONSULTING
(514) 504 9030 x30 [email protected]
www.dunsky.ca
