Winchester High School Preliminary Sustainability Conference Winchester, MA June 13, 2012
AGENDA Introduction Sustainable Design Overview Sustainable Design Strategies Open Discussion/Q&A
Sustainable Design Overview
SUSTAINABILITY IN WINCHESTER Massachusetts Green Community Adopted Stretch code Climate Action Plan LEED Gold standard for new buildings Energy Conservation Coordinator
CONSIDERATION POINTS How does one view and pursue Green?
ECO CHARRETTE To familiarize and educate stakeholders on general sustainable design principles and the LEED for Schools certification process, identify existing sustainable design opportunities, and develop sustainable design goals that specifically align with the School District and Town s goals and mission.
LEED FOR SCHOOLS Sample LEED Score Card
Sustainable Design Strategies
OVERVIEW Sustainable Sites & Water Efficiency Sustainable Materials Indoor Environmental Quality Energy Efficiency Regional/District Strategies Renewable Energy Quincy High School Library
SITE AND WATER Sustainable Sites Bicycle Storage and changing rooms Storm water management Reduced heat island Light pollution reduction Additional Sustainable Design Strategies: Bio-swales Bike Lanes Minimize parking Regional/Town related issues Rainwater Harvesting Preferred parking Water Efficiency Indoor water use reduction/conservation (20%) No permanent irrigation
ROOF GARDENS Wellesley HS Green Roof BCBS of RI Roof Garden Site and Water
BIOSWALES Regulate flows, Increase infiltration, Filter pollutants Site and Water
RAINWATER HARVESTING Wellesley High School Rainwater Harvesting System Site and Water
SUSTAINABLE MATERIALS Material Sourcing Building Re-use High recycled content material selections (20%) Certified Wood (50%) Material Saving Construction waste management & recycling (75%) Storage and collection of recyclables Additional Sustainable Design Strategies: Regional Materials Rapidly Renewable Materials Wellesley High School - Art Room Skylights
INDOOR ENVIRONMENTAL QUALITY Impact on Education Daylighting Indoor Air Quality Acoustical performance in classrooms Thermal comfort Additional Impacts Low-Emitting materials Mechanical Equipment Filtration Additional Sustainable Design Strategies: Views to the outdoors IAQ Management during construction Wellesley High School - Library
ENERGY EFFICIENCY High Performance Building Enclosure High Efficiency Lighting Daylight dimming High Efficiency HVAC Systems Energy Management System Commissioning (CxA) (MSBA) Additional Sustainable Design Strategies: Renewable Energy Systems Enhanced Commissioning Sub-metering
WINCHESTER COST EFFECTIVE ENERGY CONSERVATION MEASURES Building Enclosure Roof Insulation >R25 (7)* Window <U0.42/0.35 (10) Wall Insulation >R18 (11) HVAC Demand Control Ventilation (1) Energy Recovery (2) Condensing Boilers (3) Kitchen Ventilation Control (4) Efficient Chiller/DX (6) Motors (9) Efficient Split Systems (12) Lighting LPD <0.92W/ft 2 (5) Occupancy Controls (8) Daylight Controls (8) * Rankings are from the National Grid/SMMA Study on 9 MA schools, 2010-2011 Energy Efficiency
FUNDING SOURCES MSBA Additional 2% incentive points (of eligible costs) if 50 points earned National Grid Gas Possible incentives for high efficiency gas fired equipment NStar Electric Electric Incentives Comprehensive (CDA) Program. Lighting HVAC Building Enclosure Kitchen Equipment Energy Efficiency
SYSTEM COMPARISONS & PAYBACK ANALYSIS Option 1 2 Cooled Spaces Heated and Ventilated Spaces Geothermal Heat Pump System for heating and cooling (Admin, Library, Computer Lab, Tech Ed Classrooms) Constant Volume Energy Recovery Units for ventilation and ceiling hot water radiant panels for heating Geothermal Heat Pump System for heating and cooling (Administration Only) DX Rooftop units - Constant Volume and VAV. Constant Volume Energy Recovery Units for ventilation and ceiling hot water radiant panels or finned tube radiation for heating Quantity of Standing Column Wells 2 wells 1 Well Ability to Increase System Capacity Moderate Moderate COMFORT CONSIDERATIONS Cooling Effectiveness Very Good, but compressors cycle on/off Very Good Heating Effectiveness Fair - Supplemental Hot Water heat will be required Very Good Ventilation Effectiveness Very Good Good Overhead Heat Yes Yes - Radiant Panels Filtration Ranges 65% + at Energy Recovery Units, 30% at Heat Pumps 65% + at Rooftop Air Handlers, 30% at Fan Powered Boxes COMPARATIVE ENERGY CONSUMPTION Gas 3 2 Electric 1 2 Heat Recovery Included for Heated and Ventilated Spaces only Included for Heated and Ventilated Spaces only Hot Water Heating Plant "Hybrid" System using a combination of high efficiency Condensing style boilers with Medium mass boilers. "Hybrid" System using a combination of high efficiency Condensing style boilers with Medium mass boilers. Cost Per Square Foot $36 $35 Energy Efficiency Sample Analysis
INNOVATION AND REGIONAL PRIORITY Green Housekeeping Low-Mercury (Hg) Lamps School as Teaching Tool Renewable Energy Town goal of 10% for all school buildings Enhanced Sustainable Practices: Construction Waste Management (95%) Certified Wood (95%) Recycled Content (30%)
SCHOOL AS TEACHING TOOL Dashboard showing school energy and water performance Signage throughout highlighting sustainable features School sustainability integrated into curriculum Wellesley High School Dashboard Innovation and Regional Priority Dashboard for
SOLAR PV Cost: Roughly $8,000-10,000/kW Production: 1,300 kwh/kw Payback Enough to power 160 sq. ft. Saves ~$170/year Without incentives: ~45 years With incentives: varies PPA and Net metering as alternatives Innovation and Regional Priority Renewable Energy
WIND TURBINES Site Considerations Available Wind Site Location Energy Usage Transportation Energy Revenue/Avoided Costs Utility Charges Wholesale Market Renewable Energy Certificates Small Scale Turbines Educational Program Innovation and Regional Priority Renewable Energy
SMALL WIND TURBINES Demonstration turbines for educational purposes Innovation and Regional Priority Renewable Energy
Thank you Q&A/Discussion Preliminary Sustainability Conference Winchester June 13, 2012