Transcript TCHC Renewables - Toronto Atmospheric Fund

A Public Housing Perspective
On Implementing Renewable
Energy Projects
Philip Jeung, Director Smart Buildings & Energy Management
• Toronto Community Housing Corporation (TCHC)
• Largest residential landlord in Canada
• 160,000 residents, 6% of Toronto’s population
• 57,500 units in Toronto
Corporate Green Plan
• Green Plan – 40% reduction in greenhouse gas
emissions by 2020 relative to a 2003 baseline
• Renewable Energy Study and Implementation Plan
(REP) – feasibility of a 5, 10, 15 per cent carbon
reduction by 2020 through renewable energy
technologies
Criteria for the Deployment of
Renewable Energy Technologies
• Ownership structure of renewable energy facilities
provides greatest benefit to TCHC
• Project Partners – provides synergy to optimize
Housing’s mandate and community plan objectives
• Incentive Program that is a good fit to business
plan
Applicable Renewable Energy
Technologies
• Solar thermal
• Solar air heating
• Solar photovoltaic
• Wind energy
• Geothermal energy
Solar Thermal
• Uses energy of the sun to preheat domestic hot water
• Active systems – actively pump fluid around system
• Passive systems – natural convection to circulate fluid
Opportunities
• 40% solar fraction used
• Compatible with existing building, new builds, retrofit
• Large and relatively constant domestic hot water load
Process
• Identify number of buildings
• Identify representative buildings
• Analyze roof condition
Solar Thermal ( Hot Water ) Project
201 Logan : 2- flat panel system
Solar Thermal – Case Study
• City Solar Neighborhood program – 4 houses
• Medium Size : six-plex in Logan
• Large Size: Coatsworth
Challenges:
• Toronto Building: review process and standards
• Mechanical issues
• Structural issues
• CSA certified installer
• Audit cost
• Delay in permitting
• Lack of real data to check assumptions in payback
Solar Thermal Project Example
81 Jones – evacuated tubes system
Solar Thermal – Case Study
Major risks :
• Availability of incentives past the current limits
• Capacity to manage plan and verify savings
• Project Cost overrun and delays
• Continuous performance and energy monitoring
Solar Thermal – 33 Coatsworth
Incentives
• Long lead time for approval of contribution agreements
• signed contract with NRCan on June 2, 2009
• Took 4 month for approval
Design
• Install energy meter to measure load demand
• Storage tank, system designed to reach 40% of DHW
Selection
• Products and installers based on price and performance
• Two types of solar hot water collectors
- Evacuated tube: heat transfer surface inside glass tube
- Flat plate collectors: heat transfer surface inside a flat
plate at atmospheric pressure
Solar Thermal Project : 33 Coatsworth
Solar Thermal – 33 Coatsworth
Project Highlights :
• Over 100 solar panels installed
• Relatively short payback
• Acceptance from NRCAN
• Proven product installed
• Reference check
• Ongoing performance measurement
• Adopt Community Employment Development Policy
Solar Air Heating
• Uses energy of the sun to preheat ventilation air
• Mounting dark metal cladding over a south-facing wall
• Heated air is drawn into HVAC system on the roof
Solar Air Heating – 40 Teesdale
• Two solar wall heater, 319 m2
• Installed on upper 12 stories of masonry wall
• Projected saving $8500/year, 53 tonnes of CO2/year
Solution Highlights:
• Metal panels heat up in the daytime
• Ventilation fans draw the warmed air on the surface of
the wall through the perforations in the panels and into the
air cavity
• System is tied into existing roof mounted air make-up
units
• Heated ventilation air throughout the corridors and
common areas
Solar Air Heating – 40 Teesdale
Challenges:
• Little maintenance after installation
• Re-commissioning, refurbished through SolarWall
installer (Conserval)
• Carry controls sub-contractor to install the control and
monitoring components
Savings
• Projected Saving 344.9 GJ/year based on 9 month
heating season for 8250 cfm with operation schedule of
24 hr/day
• 1694 l/s = 3595 cfm or 7,200 cfm
• Actual saving totalling $1,500 from Sept 24 to Nov 10,
Solar Air Heating – 40 Teesdale
Lessons learned
• All new projects need continuous performance
monitoring and maintenance
• Post-retrofit savings verification
• Through monitoring reduce maintenance cost
Solar Photovoltaic
• PV installations under OPA Feed-In-Tariff contract
• Pilot project to install 140 kW solar PV panels in 14
rooftops
Solar Photovoltaic
Business Model:
• Owner purchased and installed
• JV Partnership
• Roof Leasing
Solar Photovoltaic
Challenges:
• Intensive upfront capital investment
• Application and administration logistics
• Capacity to deliver
• Scalability and Sustainability
• Continuous performance monitoring and enhancement
• Rapid technology changes
Solar Photovoltaic
Identification of risks and mitigation measures
• Availability of incentives past the current limits
• Internal capacity to manage plan and verify savings
Mitigation by:
• Seek early approval and support from Board and
senior executive
• Set up focused team to manage and deliver plan
• Build in flexibility and ease of installation and
maintenance at design stage
Solar PV Business Case ( simplified)
Solar PV
10 kW Project
Equipment
$55,250
Installation
$17,000
Design
$8,500
Commissioning
$4,250
Project Costs
$85,000
Annual Income
$9,311
Annual Costs/Maintenance
($1,450)
Yearly revenue
$7,861
Simple Payback
10.81
C02 saved
2.6
Wind Study
Annual energy yield per square meter rotor area for all 11 TCHC buildings.
Wind Speed Analysis at 75 Dowling
Conclusion
Critical Success Factors:
• Understand the opportunities in the context of Portfolio
• Sound business plan and implementation strategy
• Well balanced mix of renewable technologies
• Role of incentives, grants, rebate programs
• Measurement and Verification
• Capacity building and deployment
• Communication and education
Renewable Energy Seminar
Thank You
Philip Jeung
Toronto Community Housing
Smart Buildings and Energy Management
416 – 981-4373
[email protected]
www.torontohousing.ca