Download - Zero Energy Building for NREL
Bob Fox, Haselden Construction
John Andary, PE, LEED AP, Stantec
Tom Hootman, AIA, LEED AP, RNL
Department of EnergyNational Renewable Energy LabResearch Support Facilities (RSF)
Design Build Team
Haselden Construction
RNL: Architecture, Interiors, Landscape, Lighting
Stantec: MEP, Energy Modeling
KL&A: Structural
Martin/Martin: Civil
AEC: LEED, Daylight Modeling
Namaste Solar: Solar Consultant
Project Objectives
Safety
LEED Platinum
Energy Star
1. Mission Critical
Project Objectives
2. Highly Desirable800 staff Capacity
25kBTU/sf/year
Architectural integrity
Honor future staff needs
Measurable ASHRAE 90.1
Support culture and amenities
Expandable building
Ergonomics
Flexible workspace
Support future technologies
“How to” manual
Real-time PR” campaign
Secure collaboration with outsiders
Building information modeling
Substantial Completion by 2010
3. If PossibleNet zero design approach
Most energy efficient building in the world
LEED Platinum Plus
ASHRAE 90.1 + 50%
Visual displays of current energy efficiency
Support public tours
National and global recognition and awards
Support personnel turnover
Project Objectives
DOE Goal
“To create the technology and knowledge base for cost-effective zero-energy commercial buildings (ZEBs) by 2025.”
The NREL RSF:
• Replicable
• Commercially viable
• “How To” Manual for DOE
ZERO ENERGY BUILDING
Integrated Design
Multiday Eco-Charrette
• Kicked off competition phase of the project
• Included all disciplines in design-build team
• Set zero energy goal
• Determined ZEB and LEED Platinum best practices and strategies
• Developed section first
• Explored relationship of site, program, plan, roof and section for ZEB strategies
• Began early building simulations
Zero Energy Strategies
The Section
PV System
Natural Ventilation
Thermal Mass
UFAD
Labyrinth
Transpired Collectors
Radiant Cooling
Radiant Heating
Workplace
Daylighting
60’
1
2
3
4
Floor Plans
Site Plan
RSF RSF Parking
Massing
East +West Orientations
Zinc Pre-cast Concrete
Transpired Collector
Exterior Materials
Daylighting
Daylighting
DaylightingGlare Control + View WindowDaylight Control + Daylight Window
Daylight Enhancement
Daylight Modeling
Daylighting - Shading
Daylighting - Shading
Aluminum louver in aluminum frame
Aluminum plate window box
Natural Ventilation - Summer Day
50 F to 75 F
Windows / Natural Ventilation
Typical South Bay23% WWR
Typical North Bay26% WWR
Manual
Auto
South
North
Auto
Manual
4 FT
Windows / Natural Ventilation
Workplace - Interiors
Workplace - Interiors
Workplace - Interiors
Cost / Construction – Modularity
Cost / Construction – Modularity
ZEB Definitions
ZEB Definitions
Net Zero Site Energy Building
Net Zero Source Energy Building
Net Zero Energy Cost Building
Net Zero Energy Emissions Building
ZEB - Renewable Energy
The Section - PV
787 KW540 KW
Photovoltaic System
Overview of the PPA Process
Building Owner Solar Developer Utility Company• Gets clean,
renewable energy
• Gets a competitive long term power contract
• Provides roof or site area for PV
• Gets 30% Federal tax credit
• Gets Solar RECS from Utility
• Gets 20 year contract for power
• Installs and maintains equipment
• Gets to claim renewable energy toward renewable portfolio standard
• Provides net metering
LEED Platinum
58
Integrated Design
• Shading Studies
• Energy Demand
• Natural Ventilation
• Wall Sections
• Window / Wall Ratios
• Roof / Floor Ratios
• PV Energy Supply
Pre-Concept Analysis
Integrated Design
“Let there be light!”
Integrated Design
60’
“Poor Man’s” Double Skin Facade
Winter Mode
Summer Mode
• Total cost same• Engineering costs less• Invest in Architecture• Active to passive• Fragile to robust• Longer life• Less cost over life• Simpler
Cost Transfer
Integrated Design
WINDOW SUNSHADE
PRE-CAST SANDWICHPANEL:3” CONCRETE2” RIGID INSULATION6” CONCRETE
LIGHTLOUVERBOUNCES LIGHTDIRECTLY INTOROOM
WINTER SUN
SUMMER SUN
COOL AIR
DOUBLE PANELOW-E GLASS
TRANSPIREDCOLLECTOR
Labyrinth
Labyrinth
Labyrinth + Transpired Solar Collector
Design Simulations
• Energy Demand
• Transpired Collectors
• Thermal Labyrinth
• Double Skin Design
• Data Center Heat Recovery
• Data Center Cooling
• Natural Ventilation
• Daylighting
ZEB - Renewable Energy
RSF ROOF787 KW
3544 MBTU/YR
RSF PARKING540 KW
2432 MBTU/YR
HEATING PLANT(WOOD CHIP)1105 MBTU/YR
GREEN POWER(GRID)
4838 MBTU/YR
ZEB - Renewable Energy
RSF ROOF787 KW
3544 MBTU/YR
RSF PARKING540 KW
2432 MBTU/YR
Meets Site Energy, Source Energy, Energy Emissions and Energy Cost definitions of ZEB with only the roof and parking PV systems.
Beauty in the Numbers
Zero
