Winchester High School
relimiry Sustainability Conference Winchester, MA
JuAGENDA
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 Preferred parking
Water Efficiency Indoor water use reduction/conservation (20%) No permanent irrigation
Additional Sustainable Design Strategies:
• Bio-swales • Bike Lanes • Minimize parking • Regional/Town related issues • Rainwater Harvesting
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
* Rankings are from the National Grid/SMMA Study on 9 MA schools, 2010-2011
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/ft2 (5)
Occupancy Controls (8)
Daylight Controls (8)
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
Geothermal Heat Pump System for heating and cooling (Admin, Library, Computer Lab, Tech Ed Classrooms)
Geothermal Heat Pump System for heating and cooling (Administration Only) DX Rooftop units - Constant Volume and VAV.
Heated and Ventilated Spaces
Constant Volume Energy Recovery Units for ventilation and ceiling hot water radiant panels for heating
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
GreenHousekeeping
Low-Mercury(Hg)Lamps
SchoolasTeachingTool
RenewableEnergy
– 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 − Enough to power 160 sq. ft. − Saves ~$170/year
Payback – 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