Strategic Energy Managementat Sunnybrook Health Sciences CentreBalancing a Healthy Bottom Line

Laura BerndtP.Eng., CEM, LEED AP Manager of Energy & Sustainability

May, 2018

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Sunnybrook: When it matters most

May, 2018

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Sunnybrook: When it matters most• 2.8 million sq-ft campus• 1.2 million patient visits per year• 1,325 beds / 26 operating rooms• 10,000 staff and 2,000 volunteers at three campuses

May, 2018

• $100 million per year of innovative medical research

• Hosting 4,000 students annually

• One of Canada’s Greenest Employers (x10yrs)

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• 24x7 operation, scheduling downtime often difficult

• Power reliability critical to sensitive hospital equipment and research

• Temperature and Humidity control critical to patient comfort and recovery

• Aging infrastructure, limited operational budgets and limited capital available for renewal

Energy Management Challenges

May, 2018

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Sunnybrook’s Energy Supply

May, 2018

Utility QuantityCalendar 2016

IntensityPer ft² per year

CostPre-tax

Electricity 72.2 million kWh 25.5 kWh $10.0 millionNatural Gas 12.5 million m³ 45.4 ekWh $2.4 millionWater 626 million litres 224 litres $2.0 million

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Mitigating Energy Costs

• Direct-purchase of natural gas• Water rebates – Sewer Surcharge

Rebate• Electricity rebates – OREC & Fair

Hydro• Save on Energy Incentives• Global Adjustment management• Carbon market costs• Planning for future cogeneration

May, 2018

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Electricity Costs - Global Adjustment

May, 2018

Class A: - Peak loads vary between 11 -14 MW - Peak Demand Factor (PDF) ranges between 0.000468 - 0.000566- Projected cost for 2018/19: $6.1Million

Class B:- Consumption varies 71,000 – 74,000 MWh- Class B rates vary monthly from $70-$125/MWh- Projected cost for 2018/19: $7.2Million

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Class A - Managing Peak Demand

May, 2018

• Peak loads in May-Sept are largely driven by cooling loads

• Cooling is critical and can’t be reduced for peak load shedding

• Increasing cooling loop temps from 44F to 46F can reduce chiller loads, but effect is only temporary (about 30 min)

• Fuel switching from electric chillers to steam chillers can save 1.5MW

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Peak Electricity Consumption

2017 2016 2015

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Class B - Managing Energy Consumption

May, 2018

• Majority of energy consumption is related to base loads and not related to cooling.

• Energy conservation projects have targeted lighting, free cooling, controls upgrades, and re-commissioning.

• Future 8MW cogeneration will significantly reduce the amount of electricity consumed by the grid. (up to 80%)

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Monthly Electricity Consumption

2017 2016 2015

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• GA has increased from 45% to 65% of our electricity cost

• As more customers participate in load shifting activities, the peaks are shifting outside the typical peak hours and outside the typical peak months

• Ontario summer peaks are going down, the more this continues to happen, the higher our peak demand factor will be (with the exception of winter peaks)

Global Adjustment Trends

May, 2018

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Global Adjustment Trends

May, 2018

PDF: 0.000511

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Long Term Planning

May, 2018

• Incorporating flexibility is key for energy and infrastructure planning at Sunnybrook

• Targeting projects which offer flexibility in operations through fuel switching such as steam cooling and on-site power generation

• Targeting projects which reduce peak demand and consumption so that we continue to have the flexibility to choose between Class A & Class B depending on future market conditions

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Planning for Future Flexibility• Installed 2 x1600 Ton Steam Chillers in 2015

• Installed Eco-cube emissions equipment on our emergency generators when they were upgraded in 2013-2015 for potential for future peak load shedding.

• Planning to install an 8MW Cogeneration System to reduce total kwh by 80%

• Investigating energy storage

• Energy conservation, especially re-commissioning– BAS, Chiller plant, & air handlers

May, 2018

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Projects – Steam Turbine Chillers

• 2 x 1600 ton (York)• Reduces electricity

demand by 1.5 MW• Reduces net utility

spend by $200k/yr• $860k incentive from

Toronto Hydro• 1 new chiller can run

on emergency power

May, 2018

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Projects – Emergency Generators

• Doubled capacity of the emergency generation from 4.3 to 8 MW

• Included “Eco Cube” SCR emissions control to achieve tier 4

• Potential for peak load shedding in future

May, 2018

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Projects – Future Cogeneration

• 8 MW generation• Reduces peak by 50%• Reduces consumption

by 80%• Duct burner sized for

90,000 lbs/hr steam• Potential to combine

with diesels for further peak load reductions

May, 2018

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Projects – Free Cooling Enhancements

• Increased capacity of the free cooling system resulted in extended free cooling season

May, 2018

• Up to 500,000 kWh/yr savings

• Still a manual change-over

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Projects – Controls Upgrades (HEEP)

• Upgrade pneumatic to DDC controls• Improved thermal comfort• Reduced preventative maintenance• Improved maintenance response

time• Trial of new technologies and

strategies such as energy valves, thermostats with occupancy sensors & temperature resets

• Significant capital investment required

May, 2018

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Projects – Exterior Lighting Upgrades

• New LED streetlights, wallpacksand signage

• Increases light levels and uniformity

• Reduces electricity consumption• Improves security

May, 2018

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Thank You

Laura Berndt, P.Eng., CEM, LEED AP BD+CManager of Energy & SustainabilitySunnybrook Health Sciences Centre(416) 480-6100 x2572Laura.berndt@sunnybrook.ca

May, 2018