greening public health at the george washington university washington, dc greening public health at...
TRANSCRIPT
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Greening Public Health atThe George Washington
UniversityWashington, DC
NANCY GIAMMATTEO, AIA, – GWU SCOTT SPANGENBERG, PE, LEED – AEIBRENDON BURLEY, PhD – AEISONG ZHANG, PhD, PE, LEED AP – AEI
Speakers:
April 15, 2013
KEY DESIGN & CONSTRUCTION TEAM - •PAYETTE /AYERS SAINT GROSS•AFFILIATED ENGINEERS•PALADINO•TADJER COHEN •WHITING TURNER
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AGENDA
• Project Background
• Sustainability Goals & Process
• Modeling to Solutions
• Measurement & Verification
• Next Steps
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PROJECT BACKGROUND
The GW School of Public Health and Health Services
• Established in 1997 and remains the only School of Public Health in DC
• Over 1200 students from every state and 38 nations
• More than 50 degree options, including 21 master’s degrees, 17 graduatecertificates, 3 undergraduate degrees, and 7 doctoral degrees
• This new ‘home of its own’ (away from the medical school) will consolidates all 7 departments for the first time
• “We are not only contributing to public health, we are living it, shaping it, and influencing its future.”
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PROJECT BACKGROUND
The GW School of Public Health and Health Services
The Building is located on Washington Circle; it is the new “Front Door” to the Foggy Bottom Campus
Insert Different Map
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PROJECT BACKGROUND
East Façade (Looking South from Washington Circle)
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PROJECT BACKGROUND
South Façade (Looking North from 24th NW)
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PROJECT BACKGROUND
North & West Façades (Looking South from K Street)
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PROJECT BACKGROUND
Classrooms
Open Offices
Private Offices
Public Spaces
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PROJECT BACKGROUND
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SUSTAINABILITY GOALS GW Office of Sustainability• Signatory of ACUPCC• Reduce carbon emissions 40% by 2025 over 2008
baseline• Climate neutrality by 2040
GW Office of Facilities Services• $5 M Eco-Building Program to implement energy and
water efficiency projects in existing buildings
GW Office of Facilities Planning & Design• LEED Silver minimum for all new buildings • 5 LEED Gold buildings since April 2010; first university in
DC to achieve LEED Gold!• 7 additional projects currently registered
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SUSTAINABILITY GOALS
Evolution from LEED Silver to Platinum
Dean’s Vision• Showcase of Environmental Design• Marketability of School to Students & Faculty
Re-thinking the Budget for Sustainability• Design Efficiency• Donor Opportunities
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SUSTAINABILITY GOALS
GW SPHHSProject Design Expectations
• Integrated Design Team
• 3rd party LEED Consultant
• Active real-time Energy Modeling
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MODELING TO SOLUTIONS
MODELING TO SOLUTIONSPRE-CONCEPTS TO REALITY
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MODELING TO SOLUTIONS
Possible Solutions
Combined Heat & Power
LED
Lig
hting
Heat Wheels
Geothermal
Green Roof
Chilled Beam
Water ReuseGreen Pow
er Ice Storage
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Energy Modeling Use and Application
• Predicts energy use
• Compares different design options
• Test compliance with ASHRAE 90.1 baseline model (Appendix G)
• Verifies and optimizes control sequences
• Simulates calibrations for Measurement & Verification
MODELING TO SOLUTIONS
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SUMMARY
FEATURE
Public/Proprietary Public Domain Proprietary Proprietary Proprietary
Simulation Method 8760 hours 8760 hours 8760 hours 8760 hours
Load Design Calculation No No Yes Yes
Max # of Zones 1024 1024 Unlimited 2500
Graphic Results Summary P P P
Accepts CAD input files/gbXML P P
Export Data back to CAD files P
# Terminal Systems Types 28 28 24 21
# Primary Equipment Types 27 27 24 22
Aprroximate Cost freeware freeware $1995+$413/yr $1495+$300/yr
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Why Trane TRACE 700
Easy conversion from load calculations to energy calculations.
Unlimited max number of zones
Capability of modeling different airside systems plus many HVAC plant configurations and control strategies, including Displacement Ventilation Systems, Active/Passive Chilled Beam Systems, Variable Refrigerant Volume Systems, Demand Control Ventilation, etc. that cannot be modeled with other energy modeling software
Comprehensively and actively updated frequently to accommodate newly developed systems
MODELING TO SOLUTIONS
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Future Trends
BIM Integrated Energy Models
Combined Computational Fluid Dynamics (CFD) and Energy Models
MODELING TO SOLUTIONS
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Energy Modeling Throughout the Design Process
• Concept: Preliminary studies; load calculations
• Schematic Design: Identifies the primary energy uses
• Design Development: Conducts parametric analyses to evaluate alternative specifications & understand trade-offs between initial cost & life-cycle cost
• Construction Documents: Necessary to document compliance with codes such as the Energy Cost Budget method in the ASHRAE Standard 90.1 or the Total Building Performance section of the IECC
MODELING TO SOLUTIONS
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MODELING TO SOLUTIONS Possible Solutions
• Combined heat & power • Triple glazing window • Low e windows• Chilled beam• Displacement Ventilation • LED Lighting• Advanced Lighting Controls• Photovoltaics• Heat recovery chillers• Heat wheels• Geothermal• Green power• Green roof• Wind Turbines
• Water side economizer• Air side economizer• Daylighting • Ice storage• Water reuse• Water efficient plumbing
fixtures• Natural ventilation• Operable windows• Rainwater harvesting• Sunshade screen• Dedicated Outdoor Air
Systems• Solar Hot Water Heating
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Heat Recovery
Chiller
Variable Air Volume
Under Floor Displacement
Variable Air Volume Chilled
Beams
Dedicated Outside Air
Systems
MODELING TO SOLUTIONS
Improved Building Envelop
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MODELING TO SOLUTIONSSkin Performance
Terracotta Rain Screen – Open joints allow for air flow in the cavity behind the tiles. This creates a pressure balanced system when combined with compartmentalization of the cavity. Gaskets and overlapped joints are used to discourage water from entering the cavity while still allowing ventilation of the cavity. The air space and insulation increase the thermal performance of the exterior wall system.
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MODELING TO SOLUTIONS Chilled Beams on Dedicated Outside Air
Chilled beams reduce the need for cooling by air, allowing the use of dedicated ventilation.
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Utilizes year-round cooling demands to generate heating water for HVAC use. Water use is also reduced at evaporative cooling towers.
MODELING TO SOLUTIONSHeat Recovery Chiller
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MODELING TO SOLUTIONSUnder Floor Displacement Ventilation
Displacement ventilation limits cooling to the occupied area and takes advantage of natural air currents to improve environmental quality.
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MODELING TO SOLUTIONS Daylighting, Lighting, and Controls
Integrating Artificial & Natural Lighting: Automated reduction of artificial lighting in response to daylight conditions on both interior and exterior.
Energy Efficient Lighting: Extensive use of CFL and selected use of LED lights reduce energy use from required lighting.
Controls: Lighting Management System in public spaces. Extensive use of occupancy sensors and timer switches throughout the building.
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MODELING TO SOLUTIONSStorm Water Management and Reclamation
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MODELING TO SOLUTIONS
What Did NOT Apply & Why
• Combined Heating and Power: Project Scale; Initial Cost
• Photovoltaics: Irregular Roof Shape, Not Enough Roof Space
• Thermal Massing: Building Façade, Cost
• Natural Ventilation: Climate in Washington DC Area; Hot & Humid in Summer
(Expand)
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MODELING TO SOLUTIONSCombined Heat and Power
Utilize locally consumed fuel to simultaneously generate power. Requires sustained demand for heating to run a generator.
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MODELING TO SOLUTIONSPhotovoltaics
Can be applied to rooftops, and emerging technology includes facades. Requires large amounts of real estate.
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MODELING TO SOLUTIONSAnnual Energy Use Comparison
Proposed Design vs. ASHRAE 90.1-2007 Baseline
Baseline Proposed Design0
5,000
10,000
15,000
20,000
25,000
30,000
35,000
Fan
Pump
Heat Rejection
Cooling
Heating
Lights
ReceptacleAnnu
al E
nerg
y Us
e (M
MBt
u/yr
)
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MODELING TO SOLUTIONS
Lessons Learned• There is no one size fits all solution for a sustainable building.
• Systems can work against each other, do not make decisions in isolation.
• Be aware of the limitations of your energy model; complex systems cannot always be modeled out of the box.
• Energy models are predictive of, but not guar
• Try to minimize the glass area of the building. This project had 10% more glass allowed beyond Appendix G; which penalized the project of X energy points.
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MEASUREMENT & VERIFICATION
“Begin with the end in mind” (Steven Covey)
• Data Collection (Metering)• Data Transfer (Trending)• Data Management (Optimization)
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MEASUREMENT & VERIFICATION
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MEASUREMENT & VERIFICATION
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MEASUREMENT & VERIFICATION
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Importance
• Better building maintenance• Improved real return on investment• Benefits to future projects from
knowledge developed
MEASUREMENT & VERIFICATION
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GW Leadership Approach
Facility Services (Jim Schrote):• Commissioning Manager Leadership (Joe Lenzi)• Energy & Environmental Management (Doug Spengal)• Operations & Maintenance Leadership (Bob Oakley)
MEASUREMENT & VERIFICATION
EEM O&M
CX Manager
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NEXT STEPSBuilding Dashboard: Education on Display
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NEXT STEPS
BIM Data Model
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NEXT STEPSCurrent LEED Point Standing
Current Points Targeted / Possible Points
26 / 26 pts. Sustainable Sites 10 / 10 pts. Water Efficiency 27 / 35 pts. Energy & Atmosphere 6 / 14 pts. Materials & Resources 12 / 15 pts. Indoor Environmental Quality
6 / 6 pts. Innovation & Design Processes 4 / 4 pts. Regional Priority 91 / 110 pts.
40 110
Certified Silver Gold Platinum
50 60 80
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NEXT STEPS
Future of SPPHS Project
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Greening Public Health atThe George Washington
UniversityWashington, DC
NANCY GIAMMATTEO, AIA, – GWU SCOTT SPANGENBERG, PE, LEED – AEIBRENDON BURLEY, PhD – AEISONG ZHANG, PhD, PE, LEED AP – AEI
Speakers:
April 15, 2013
KEY DESIGN & CONSTRUCTION TEAM - •PAYETTE /AYERS SAINT GROSS•AFFILIATED ENGINEERS•PALADINO•TADJER COHEN •WHITING TURNER