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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REPLICATION INNOVATION

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

REPLICATION INNOVATION

• Daylight / Windows• North Diffuse Daylight• Views

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

DAYLIGHTING STRATEGIES

REPLICATION INNOVATION

• Light Shelf• Screen Shade

• Daylight Harvesting Sunscreen• Parabolic Louver Blades

REPLICATION INNOVATION

• High Angle Summer Daylight• Low Angle Winter Daylight

REPLICATION INNOVATION

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

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REPLICATION INNOVATION

• Cost Effective Precast Envelope• Horizontal Windows

• Daylight Harvesting System Becomes the Architecture

REPLICATION INNOVATION

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

NATURAL VENTILATION

REPLICATION INNOVATION

• Good Thermal Envelope• Cost Effective Precast

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

ENVELOPE

REPLICATION INNOVATION

• 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

REPLICATION INNOVATION

• 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

REPLICATION INNOVATION

• 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

SELF REPORTING GBCI CREDIT

SELF REPORTING GBCI CREDIT

SELF REPORTING GBCI CREDIT

SELF REPORTING GBCI CREDIT

SELF REPORTING GBCI CREDIT

See document

provided that can

be used to cut

and past the

suggested

information to

get CE credit.