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WIND POWER PURCHASE AGREEMENT James W. Rosner, P.E., OSU Utilities Director
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OSU Overview
OSU is a land-grant, public research university located
in Stillwater, Oklahoma and founded in 1890 under the
Morrill Act.
Official enrollment for fall 2012 was 22,369 students
(OSU-Stillwater only; undergrad and graduate).
Power Plant History – OSU had generated its own
power for more than 100 years.
Energy Conservation Program – Saved over $22M
system-wide since the program’s inception in 2007.
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Wind Energy
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Combined Efforts
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Blackwell Industrial Authority
Oklahoma Gas & Electric (OG&E)
Oklahoma State University (OSU)
Blackwell
OG&E
OSU
20
11
Win
d P
ow
er
Ag
ree
me
nt
2007 Agreement
• 10 yr w/ OSU
• Conventional
• Green Power Wind
Rider only “green”
2006 2007 2009 2010 2011 2012 2013
Electrical Sources
• OG&E
• 7 MW Co-Gen Plant
(1948)
Needed long-term
power purchaser
Partnered with Own
Energy to develop mid-
sized wind farm
Dec 2012
• Construction Complete
May 2012
• Construction Start
Jan 13
• Start electrical
generation for OSU!
Initial Wind Proposal
• Not in OSU’s favor
Replace Plant
• Co-Gen?
• Tri-Gen?
• Sell back Electricity to
OG&E?
Stop Co-Gen w/ wind
3d Party Co-Gen Study
Energy Needs
• Protect rates from rising NG cost
• Retain RECs and wind benefits
• Future CO2 legislation concerns
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Cowboy Wind Farm
20 year arrangement with OG&E
26-turbines producing 60 megawatts
OSU Purchasing 110,000,000 kW-hr a year
67% of power for Stillwater campus
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Cowboy Wind Farm
OSU qualified for EPA’s Green Power Leadership Club
CO2 emission reduction equivalent to
- 9,000 homes annually
- 15,000 passenger vehicles annually
OSU now ranked:
- #5 in Top 20 College/Universities
- #43 overall national ranking
- Lifted Big XII from #5 to #3
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Cowboy Wind Farm
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Manufacturer Siemens
Model SWT-2.3-108
Nominal Power 2,300 kW
Voltage 690 V
Hub Height 80 m (262 ft)
Diameter 108 m (354 ft)
Blade Length 53 m (174 ft)
Swept area 9,144 m2
Speed Range 6-16 rpm
Cut-in Wind Speed 3-4 m/s (6-9 mph)
Rated power at 11-12 m/s (24-27 mph)
Cut out wind speed 25 m/s (56 mph)
Rotor Weight 60,000 kg (66 tons)
Nacelle Weight 82,000 kg (90 tons)
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Cowboy Wind Farm
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Economic Benefits
Electrical Rate Predictability
- Commodity price contractually smoothed and regulated
- Natural gas is market driven
- Less volatility to our customer’s rates and their budgets
Retirement of electrical turbines
- We did not have to replace aging equipment
- Elimination of seven FTE positions
Positive economic impact to local communities
Projected to save in excess of $10,000,000 over the life of
the 20-year contract.
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Cost of Energy
Projected to save in excess of $10,000,000 over the life of
the 20-year contract.
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Intrinsic Benefits
Become better stewards of our environment
Reduction of carbon emissions
Use of local and renewable resource
Positive economic impact to local communities
Complements our land-grant mission
Excellent public relations
Education benefits for wind technology courses
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Questions?