Moving to High Performance Design

Design GroupApril 30, 2014

Moving to High Performance Design

Carey Nagle

BNIM Architects

Scott Bowman

KJWW Engineering

Many slides are courtesy of BNIM Architects – Not all are referenced

Sustainability

Efficiency

High Performance

REGULATORY PRESSURES

Codes and Standards

Measure Performance?

• ASHRAE Standards (90.1)

• Energy Star

• Code (IECC)

• LEED

• IgCC

• Green Globes

• BREEAM

DOE 30%

Reduction

Target

Courtesy PNNL

ASHRAE 90.1-2013?

ASHRAE 90-1975 ASHRAE 90A-1980

ASHRAE 90.1-1999

ASHRAE 90.1-2001

ASHRAE 90.1-2007

ASHRAE 90.1-2004

ASHRAE 90.1-1989

ASHRAE 90.1-2010

ASHRAE Standard 90.1E

ne

rgy U

se

In

de

x (

19

75

Us

e =

10

0)

Year

1970 1975 1980 1985 1990

50

1995 20152000 20102005

110

100

90

80

70

60

14%

4.5%

.5%

12.3%

4.5%

18.5%

Courtesy USGBCLEED v4?

LEED

MOVING TO HIGH PERFORMANCE

Integrative Design

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Owner

Architects

Consultants

Utility Companies

INTEGRATE

=

UNITE

COLLABORATION + INTEGRATED DESIGN PROCESS

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Use Less

• Reduce Loads

• Passive

• Envelope

Use Efficiently

• System Selection

• High Efficiency

Make On Site

• Renewable Energy

• Portal to Future

Energy Modeling

• Key to High Performance

• Important to understand interaction

• Many approximations – manage expectations

• Know limits of software

• Understand gross assumptions!

• Move from isolated evaluations to bundling

• Set early goals – Measure against them often!

23%

44%

42%

15%

21%

Why kBtu/sf

• ASHRAE currently uses energy cost

• Dollars reflect some local energy utilization and market conditions

• Suppressed sources can obscure signals

– Natural Gas

– Renewable Energy (Wind or Solar)

• Need to measure true performance

• Location, Location, Location

– 28 kBtu/sf means something in Iowa

– What about Portland?

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Integration Leads to High Performance

Iowa Utilities Board / Office of Consumer AdvocateState of Iowa

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Total EUI :

28.0kBtu/sf/yr

% Reduction from code base EUI

60%Model for other

government & private sector entities

LEEDPlatinum

VISIONARY GOALS

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Building Area

44,640GSF

Cost

$204Per GSF

MODEST BUDGET

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REPLICATION + INNOVATION

REPLICATION INNOVATION• Passive Strategies First• Orientation + Planning• Shallow N-S Footprint depths• Daylighting• Natural Ventilation

FLOORPLAN

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REPLICATION + INNOVATION

REPLICATION INNOVATION• Passive Strategies First• Orientation + Planning• Shallow N-S Footprint depths• Daylighting• Natural Ventilation

FLOORPLAN

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Replication + Innovation

REPLICATION INNOVATION

• Orientation• Shared Parking

• Independent of Power Plant

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• Solid West & East Envelope• Mitigate Heat Gain• Mitigate Glare


• Daylight / Windows• North Diffuse Daylight• Views

• Light Tubes• Daylight Responsive Dimming• Daylight Harvesting Sunscreen• 98% Daylighting

DAYLIGHTING STRATEGIES


• Light Shelf• Screen Shade

• Daylight Harvesting Sunscreen• Parabolic Louver Blades


• High Angle Summer Daylight• Low Angle Winter Daylight


• Shorter Furniture Panel System Provides Full Daylighting 70% More of the Time as Compared to Existing

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• Cost Effective Precast Envelope• Horizontal Windows

• Daylight Harvesting System Becomes the Architecture


• Operable Windows • Weather Station• Building Automation System Alert• Systems Tie-In• Cost Effective

NATURAL VENTILATION


• Good Thermal Envelope• Cost Effective Precast

• Thermal Bridging Mitigation• Non-Conductive Precast System• Material Duality

ENVELOPE


• Passive Strategies• Geothermal• Energy Recovery

• Occupancy Sensors Per Workstation• Demand Controlled Ventilation• Building Automation System • Photovoltaic Panels

ENERGY STRATEGIES

19.1%of Building Energy Use

RENEWABLE ENERGY


• Passive First • Employ Loads Efficiently• Employ as Funding Becomes

Available

Energy Monitoring

LEED Measurement & Verification

Electrical Circuits Monitored• Lighting• Plug Loads• Mechanical Equipment• General Building Loads• IT Equipment

Geothermal Loop

Data Collected by Capitol Complex Energy Management System


• Ensures Intended Operation• Identifies Additional Savings• Provides Research and

Demonstration Data

RESULTS

$54,000 Annual Savings

16.7 – 77% saved

26%18%

24%20%

11%

Includes PV

75%

98%

Includes PV

75%

98%

MEASUREMENT AND VERIFICATION

Second Year M&V Results:

• Design Estimated Model EUI – with PV 28.1

• Monitored EUI – with PV 16.7

• Monitored EUI – without PV 21.2

Conclusions:

• Model over predicted pumping energy – software limited

• Model slightly over predicted lighting savings

• Plug loads are significantly lower than design expectations

• Corrected energy model tracks actual use well

• Tools supported good decision making!

Energy Star = 100

Awards and Recognitions

• AIA Committee On The Environment

– Top 10 Green Building Award 2012

– Top 10 Plus in 2014

• ASHRAE Technology Award

– Second Place in 2014

• AIA Central States Region Merit Award

• AIA Iowa Merit Award

• Des Moines’ Environmental Impact Awards

– Built Environment Award

http://bt.e-ditionsbyfry.com/publication/?i=200800&p=38

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Moving to High Performance Design

Questions?

SELF REPORTING GBCI CREDIT






See document

provided that can

be used to cut

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suggested

information to

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