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Tampa Convention Center • Tampa, Florida

Net Zero Today - Fort Carson on the Cutting Edge of High Performance

Net Zero Case Studies

John Hickey, PE, CEM, LEEF AP BD+C

August 15, 2017

Energy Exchange: Connect • Collaborate • Conserve

Learning Objectives

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1. Familiarize with goals of Executive Order 13693 on High Performance Sustainable Building design and to achieve net zero energy performance

2. Understand the value of an Integrated Project Team and how the Owner and Design Build team must collaborate to achieve high performance

3. Identify the strategies used for the design and construction of a net zero facility in addition to unique strategies based on bioclimatic principles

4. Understand successful strategies to achieve LEED Platinum Certification


• Executive Order 13693 calls for Federal Buildings to achieve Net Zero Energy performance by 2030.

• The Army Net Zero Initiative is a holistic approach to addressing energy, waste, and water at Army installations.

• Each step is a link towards achieving Net Zero goals.

• The Army Net Zero approach is comprised of five interrelated steps

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US Army Net Zero Goals


Net Zero Goals

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Reduction - maximize efficiency and conserve

Re-purpose - divert waste, water, or energy to a secondary purpose

Recycling or composting - management of the solid waste stream, development of closed loop systems to reclaim water

Energy recovery - ventilation and mechanical systems, ieCogen

Disposal - last resort after the last drop of water, the last bit of thermal energy and all other waste mitigation strategies have been fully exercised.

Energy Exchange: Connect • Collaborate • Conserve5

Fort Carson Sustainability Goals


Case Study

4th Infantry Division, 13th Combat Aviation Brigade, Aviation Support Battalion Hangar,

Fort Carson, CO


Background

• USACE Omaha District• Fort Carson• 4th ID Combat Aviation Brigade• Design-Build Project, Firm Fixed Price • Single step, full & open selection

– Best value/trade-off process– Energy use reduction and onsite energy generation were the most

important factors during the source selection


Program

• Aviation Support Battalion Hangar– 137,000 Gross Square

Feet– 328 Total Personnel– 58,000 SY of airfield

pavement– 80 acres of

development


Integrated Project Approach

• Started by D/B Team at onset of RFP response phase

– Select the “right” team, not the “cheap” team

• Collaborative, integrated planning, design, and construction team

– MEP subcontractors on board during RFP phase

• Identifies requirements and to establish performance goals

– Pre submission sustainability focused charrettes

• Evaluates use of passive prior to active systems

– Innovative systems, solar wall


Net Zero Approach


Integrated Project Approach -Construction

• Responds to the clients needs and challenges– Integration with Government 3rd party Cx consultant– Scope focused design reviews

• Determines how climate and local and regional context impact the design

– Evaluation of ground mounted v. roof mounted v. car port mounted solar panels

• Execute, execute, execute– Passing air barrier testing

• Ensures incorporation of these goals throughout lifecycle of the building, including deconstruction.

– Measurement and verification


Strategy to Achieve Energy Goals

• Maximize efficiency of passive and active building systems• Optimize building orientation • Construct high performance building envelope• Systems are simple to maintain – no exotic solutions• Utilize passive and active renewables that are LCC justified

within the construction cost limit• Promote continuous commissioning and energy monitoring

during operation– Sub-metering– Measurement & verification process


Improved Building Envelope

• Exceeded ASHRAE 90.1-2007 – Increased Roof Insulation: R-50– Increased Wall Insulation: R-43 – Improved Glazing Performance: U-

value is 0.31, SHGC is 0.25– Building Air Barrier: leakage tested

at 0.15 cfm/ft² (actual 0.12)• Hangar Door Double Seals

-Normal doors 10 mph wind= 56cfm/lf= 2 ACH


Lighting

• Exterior Lighting – LED for POV parking– HPS for apron lighting– Reduction of 81% energy use

• Interior Lighting– LED for hangar and admin– T5 Fluorescent for industrial strip

fixtures– Reduction of 68% energy use

• Automated Lighting Controls• Addressable fixtures


• District Energy Plant • VAV w/ HW Reheat• Energy Recovery

Ventilation• Radiant In Slab

Heating • Building Automation• Energy Monitoring

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Energy Conservation Measures


Energy Conservation Measures

• High Efficiency Compressors– VFD Drive– Lead – Lag – Heat Recovery

• Low Flow Plumbing Fixtures


Renewable Energy

• Transpired Solar Collectors: Pre-heat outside using solar energy – 223,000 kWh/yr

• Solar Photovoltaic Panels: Consolidated ground mounted array– 2,130,000 kWh/yr


Energy Performance

0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

8,000

ASHRAE 90.1-2007 Baseline (MMBtu) ASB Hangar Design (MMBtu)


Energy Performance

-10,000

-5,000

0

5,000

10,000

15,000

20,000

ASHRAE 90.1-2007Baseline

ASB Hangar Design Transpired SolarCollectors

Solar PV Array

ASHRAE 90.1-2007 Baseline ASB Hangar Design Transpired Solar Collectors Solar PV Array

Key Metrics

• 56% energy savings over ASHRAE 90.1-2007, Appendix G, excluding renewables

• Renewables offset 105% of building energy usage

• EUI = 52.4 kBtu/sf


ASB Hangar Site

APRON

WASH RACK

HANGAR

PV ARRAY

ATCTBASE OPS


Sustainable Strategies

• Registered project under LEED® NC Version 3.0

• Silver Certification through GBCI is required.

CATEGORY CREDITS ACHIEVED

Sustainable Sites 22

Water Efficiency 5

Energy & Atmosphere 33

Materials & Resources 6

Indoor Environmental Quality 8

Innovation & Design Process 4

Regional Priority 3

Total 81


• Community Connectivity• Alternative Transportation

– Bicycle Storage and Changing Rooms

– Parking Capacity– Parking for Low Emitting &

Fuel Efficient Vehicles

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• Site Development - Maximize Open Space – Exemplary credit was achieved since 393,000sf

of dedicated open space was provided.• Heat Island Effect

– Both Non-roof and Roof credits were achieveddue to high SRI value materials: concrete onthe site; metal panels;TPO membrane on theroof



• Construction Waste Management– 89% waste diversion

• Recycled Content– 28.6% total building materials

• Certified Wood– 73.3% of wood based building materials were

obtained in accordance with FSC criteria



• Construction Indoor Air Quality plan and management strategies

• Selection of Low VOC materials for Indoor Finishes Paint, Sealants, Adhesives, Flooring and Carpet, and Composite Wood

• Post Construction Building Flush-out



• Internal Recycling Storage Areas

• Enhanced Commissioning• Enhanced Refrigerant

Management• Measurement and Verification• Indoor Chemical Pollutant

Source Control• Controllability of Occupant

Lighting


• High Performance Sustainable Building– Achieved LEED Platinum Certification– Net Zero Energy, 105% Energy Reduction

over ASHRAE 90.1-2007 Baseline Building– Cost Below CCL

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Results


• Net Zero Ready• LEED Gold

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BAAF Air Traffic Control Tower


• Integrated Project Approach• Use of simple, current technologies• Innovation• Owner focus on high performance

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Wrap-Up


• http://www.carson.army.mil/• http://www.carson.army.mil/paio/sustainability.html• http://www.asaie.army.mil/Public/ES/sustainability.html• https://www.fedcenter.gov/programs/eo13693/• http://www.wbdg.org/references/pa_dod_energy.php• http://www.wbdg.org/design/sustainable.php• http://www.hpbmagazine.org/Aviation-Support-Battalion-Hangar-

Ft-Carson-Colo/

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Resources

http://www.carson.army.mil/

http://www.carson.army.mil/paio/sustainability.html

http://www.asaie.army.mil/Public/ES/sustainability.html

https://www.fedcenter.gov/programs/eo13693/

http://www.wbdg.org/references/pa_dod_energy.php

http://www.wbdg.org/design/sustainable.php

http://www.hpbmagazine.org/Aviation-Support-Battalion-Hangar-Ft-Carson-Colo/

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