Tom Hootman, AIA, LEED AP BD+C RNL, Director of ... - Archive - ULI

Shanti Pless, LEED AP
NREL, Commercial Buildings Research Group
Tom Hootman, AIA, LEED AP BD+C
RNL, Director of Sustainability

WHO IS PURSUING
NET ZERO ENERGY

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New Buildings Institute
Getting to Zero 2012 Status Update: A
First Look at the Costs and Features of
Zero Energy Commercial Buildings
(March 2012)

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New Buildings Institute
Getting to Zero 2012 Status Update: A
First Look at the Costs and Features of
Zero Energy Commercial Buildings
(March 2012)

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New Buildings Institute
Getting to Zero 2012 Status Update: A
First Look at the Costs and Features of
Zero Energy Commercial Buildings
(March 2012)

California PUC 2030
Massachusetts 2030
Federal / EISA 2030
ASHRAE Vision 2020
2030 Challenge
Living Building Challenge

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1K-5K
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5K-10K 10K-25K 25K-50K
New Buildings Institute
Getting to Zero 2012 Status Update: A
First Look at the Costs and Features of
Zero Energy Commercial Buildings
(March 2012)
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50K-100K >100K

NREL – RESEARCH SUPPORT FACILITY
NREL – RESEARCH SUPPORT FACILITY II
SMUD – CAMPUS OPERATIONS
SINGAPORE – CASE STUDY

DOE / NREL: Client
Haselden Construction: General Contractor
RNL: Architecture, Interiors, Landscape, Lighting
Stantec: MEP Engineering, Energy Modeling
KL&A: Structural Engineering
Martin/Martin: Civil Engineering
AEC: LEED, Daylight Modeling, Commissioning
Namaste Solar: Solar Consultant

Federal Office Building
222,000 SF
822 Occupants
$64M Firm Fixed Price
$57.4M Construction
Complete June 2010

Project objectives
Absolute energy target
Risk / reward / control balance
Substantiation
Incentive award fee

I want a green building
Design a LEED building
Design a building to use 30% less
energy than ASHRAE 90.1-2004
Design a building to use less than
25,000 BTU/sqft
Design a net zero energy building

PREDICTIVE MODELING
(Absolute energy target)
VERSUS
COMPLIANCE MODELING
(Percent better than ASHRAE 90.1)

New Buildings Institute
Energy Performance of LEED for New Construction Buildings
(March 2008)

Heifer International Center
NVCI Cancer Research
Kitsap County Admin Building
The Signature Centre
Great River Energy Headquarters
Ft. Carson Brigade/Battalion HQ
NREL Research Support Facility
International Fund for Animal Welfare
Omega Center
Chevron Office
Bremerton BEQ
University of Denver Sturm College
Naval Facilities
Ft. Lewis Barracks and Dinning
Dillard University
EPA Region 8 Headquarters
Fernald Visitors Center
Commerce City Civic Center
Leo Trombatore Office
ASU School of Journalism
ASU College of Nursing & Health
Federal Reserve Bank of Kansas City
Leprino Building
San Joaquin Admin Building
Las Cruces Courthouse
NASA Sustainability Base
Applied Research & Development
Aircraft RSF
National Association of Realtors
Oregon Sustainability
Fort Bragg Forces Command HQ
San Joaquin Comm. College
DC Federal Building
Cost per Square Foot
$600
$500
$400
$300
RSF Cost: $259/SF
Average Cost: $334/SF
$200
$100
$-
Other
Certified
Silver
Gold
Platinum
Source: DBIA Project Database

Net Zero Site Energy Building
Net Zero Source Energy Building
Net Zero Energy Emissions Building
Net Zero Energy Cost Building

Demand-Side:
Reduce site energy though low-energy building
technologies
On-Site Supply:
Renewable energy within building footprint
Renewable energy within site
Off-Site Supply:
Renewable energy off site to generate energy on site
Purchase off-site renewable energy sources

Baseline Energy Use
Passive Design
Reduced Energy Use

Efficient Systems
Dramatically Reduced
Energy Use
Renewable Energy

Energy driven form
115,000 SF
Conventional form
65,000 SF

70%
Window to Wall Ratio

Ambient lighting with
daylight sensors for 25 fc
Ambient daylight
6 watt task light
50 fc

Source: NREL, “Reducing Plug and Process Loads for a Large Scale, Low Energy Office Building: NREL’s Research Support Facility”

RSF Staff Parking
RSF
RSF II
RSF Visitor Parking

New Building = 35 kBtu/SF/year
Leased Building = 133 kBtu/SF/year
Annual Energy Savings = $275,590

20 Year NPV = $4.4M or $20/SF
30 Year NPV = $6.0M or $27/SF

Monthly EUI (kBtu/ft 2 )
Credit: Chad Lobato/NREL
Model
RSF
PV
Model
RSF
PV
Model
RSF
PV
Model
RSF
PV
Model
RSF
PV
Model
RSF
PV
Model
RSF
PV
Model
RSF
PV
Model
RSF
PV
Model
RSF
PV
Model
RSF
PV
Model
RSF
PV
Annual EUI (kBtu/ft 2 )
Measured Versus Modeled Monthly and Cumulative EUI
4.5
4.0
36
32
The PV system is sized
for an annual EUI of
35.1 kBtu/ft 2 .
3.5
28
3.0
2.5
2.0
1.5
24
20
16
12
PV
Data Center
Mechanical Systems
Plug Loads
Lighting
Heating
Cooling
Model Annual EUI
RSF Annual EUI
1.0
8
0.5
4
0.0
0
October
2010
November
2010
December
2010
January
2011
February
2011
March
2011
April
2011
May
2011
June
2011
July
2011
August
2011
September
2011
Note: The annual EUI values
are demand side values
and do not include the
61
Innovation for Our Energy Future

Power Density (W/ft 2 )
October 2010 – September 2011 Lighting Power Density
0.35
0.33
0.30
0.28
0.25
0.23
0.20
0.18
0.15
0.13
0.10
0.08
Model Average
October 2010
November 2010
December 2010
January 2011
February 2011
March 2011
April 2011
May 2011
June 2011
July 2011
August 2011
September 2011
0.05
0.03
0.00
0 2 4 6 8 10 12 14 16 18 20 22 24
Credit: Chad Lobato/NREL
Time of Day
Innovation for Our Energy Future

Power Density (W/ft 2 )
0.65
October 2010 – September 2011 Plug Load Power
Density
0.60
0.55
0.50
0.45
0.40
0.35
Credit: Matthew Luckwitz/NREL
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0 2 4 6 8 10 12 14 16 18 20 22 24
Credit: Chad Lobato/NREL
Time of Day
Innovation for Our Energy Future
Model Average
October 2010
November 2010
December 2010
January 2011
February 2011
March 2011
April 2011
May 2011
June 2011
July 2011
August 2011
September 2011
Note: The elevators are included in the plug loads

WHAT ARE THE
BEST PRACTICES

1 Performance-based procurement
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Predicting energy use
Passive architecture and load reduction
Low energy active systems
Integrated renewable energy
Zero energy operation

WHO IS PURSUING
NET ZERO ENERGY