The document provides information about energy usage and renewable energy initiatives at the US Air Force Academy for fiscal year 2012. It details that total facility energy costs were $8.3 million, including $3.9 million for electricity and $2.3 million for natural gas. It also lists several renewable energy and energy efficiency projects implemented over the years, such as ground source heat pumps, photovoltaic panels, and a 6 megawatt solar array. The document concludes with discussing the academy's progress toward its net zero energy installation goal and potential future renewable energy sources to achieve net zero by 2020.

1. HQ U.S. Air Force Academy
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US Air Force Academy
Energy
1/1
5

2. Source Energy & Fleet
Fuel Distribution
FY 12 Facility Energy Cost Data
Electric 80,369 MWh $ 3.9M
Natural 510,801 MBtu $ 2.3M
Propane 89,768 Gal $ 0.1M
Potable Water 485 MGal $ 1.8M
Non-Potable Water 532 MGal $ 0.2M
TOTAL COST FY10 $8.3M
Bus Fleet Data FY12
Miles Driven 196,836
Gallons of Fuel 41,402
TOTAL COST FY10 $132.5K
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3. USAFA Energy
Initiatives
Conservation, Innovation, Education
USAFA Energy Initiatives
The Air Force Net Zero Installation  1. Ground Source Heat Pumps at Batting Cages
1
o Installed 2006
 2.
2 Photovoltaic Roofing Vandenberg Hall
1
o ~180 kW – Operational East Tower
o ~420 kW – Operational West Tower
2
4  3
3. Ground Source Heat Pumps at Entry Control
3 Points C-1 and C-2
o Installed 2004
 4.
4 Maxicon Irrigation Control System
o Installed 2010
5 6  5.
5 Methane Recovery Sludge Reheat at Waste
Water Treatment Plant
o Installed 1998
 6
6. 30 kW Microturbine Burning Digester Gas
o Installed 2004
7
 7.
7 6MW Solar Array Funded with ARRA funds
8
10
o Fully operational June 2011
9
8.
8 Ground Source Heat Pumps at Visitor Pass
and Identification
o Installed in 2003
Demonstration Projects  9.
9 Ground Source Heat Pumps at South Gate
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10
16 kW o Installed in 2003
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4. USAFA Solar Array
 6 MW peak power (~5.2 AC)
 18,888 modules
 30 drive motors, 4,800 piers
 12,500 MWh in first year of operation
 Expected 11,600 MWh
 ~15% of USAFA’s load
 ~$802K saved (Jul 11 – Jun 12)
 Third-party owned
 Sun Power Corporation
 Sun Power T0 system
 Power directly to USAFA south
substation – doesn’t leave USAFA
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5. FY12 Renewable
Energy Summary
 Renewable Energy Generation
 Solar Array (Oct 11 – Aug 12)
 11,465,280 kWh
 Vandenberg Hall (Oct 11 – Aug 12)
 337,445 kWh
 Total Savings
 15.5% of total electric use
 Renewable Energy Purchases
 Wind: 600,000 kWh
 Hydro: 9,592,072 kWh
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6. Net Zero
 FY11 NZEI progress = 2.5% complete
 Conventional electricity and natural gas account for 95%
of energy use and cost in FY12
 Total FY12 energy expenditure = $6.3 million
FY12 Utility Expenditures
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7. Net Zero Potential
Composition
 Final NREL net-zero energy report delivered Jan 12
 Potential energy savings initiatives account for 19%
 Renewable energy required for the remaining 81% to achieve net-zero
Renewable Fleet, Non-enewable
r
0.6% Fleet, 1.2%
PVGround
-
Efficiency, 18.8% Mount, 4.5%
PV Roof Mount,
-
1.7%
SVP, 1.3%
Micro Hydro, 0.2%
Biomass CHP, Small Wind, 0.1%
60.8%
GSHP, 11.2%
SHW, 0.3%
2020 Energy Mix
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8. Integrating Energy in the
Curriculum – The Courses
 Developing new courses/revising existing
 Engr 495: Sustainability & Green Engineering
 ECE 495: Green Commercial Power Systems
 Civ Engr 464: Architectural Design (Sustainable
design)
 Civ Engr 480/485: Const Mgt (Env Req’s &
Sustainability)
 Mech Engr 468: Renewable Energy
 Chem 100/200: Applications of Chemistry
(Energy as central theme)
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9. Energy Curriculum
 Incorporating energy & sustainability in facility design
 Alternative energy sources (wind turbines/PVs)
 Passive solar heating (heat pump pre-heat, solar
hot water, on-demand water heater)
 Active solar (PV arrays)
 Lighting (solar tubes) www.inhabitat.com
www.inhabitat.com
 Energy conservation
 Insulated forms & green roof
 Water conservation
 Waterless urinals
 Solar Micro-grid (DFEC/DFCE)
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10. Energy Curriculum
 12 green engineering principles  Energy
 Cradle-to-cradle  Energy basics
 Intro to USGBC/LEED  Sustainable/renewable
 Project Site Factors  Fossil Fuels
How much coal is
 System Management  Nuclear required to produce
the same amount of
 Energy Impacts  Wind energy as 10 kg of
U 235
 Public Interaction  Solar/Photovoltaic
 Wave/tide
 Sustainability & the developing
world  Biomass & Geothermal
 Water How much land is How much more
required to make up farmland would
25% of the COS America need to farm
 Power energy demand to grow corn for
using 2MW wind enough ethanol to
 Infrastructure turbines completely replace the
gasoline used in all of
our cars?
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11. Energy Research
(CF3SO2)2N-
Chemistry Research Center N
+
N
Laser & Optics
H3C
Research Center
 Ionic liquids for heat transfer H3C
 Hydrogen generation/storage
CH3
 “Black silicon” for more
Solar Power Heat Transfer efficient solar cells
Life Sciences Research Center Electrical & Computer Engr
 Algae cultivation for biofuels  7KW solar Green Energy lab
 Biofuel extraction & use in aviation  Power generation, storage,
and conversion
Engineering Mechanics
Algae Biofuel
 Wind energy to power sensors and
transmitters on bridges & remote sites
Aeronautical Engr
Civil & Environmental Engr
 Wave power from
 Energy foundations with
the ocean
ground source heat pumps
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