CAPTURING THE POWER OF NATURE
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Transcript of CAPTURING THE POWER OF NATURE
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Iowa Stored Energy Park
APPA Engineering and OperationsApril 16, 2007
Sam ShepardElectricity and Air Storage Enterprises
CAPTURING THE POWER OF NATURE
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CAPTURING THE POWER OF NATURE
The Wind blows mightily in Iowa
▪At Night
▪In the northwest quadrant
▪So -- How do we move the wind ?
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CAPTURING THE POWER OF NATURE
Presentation Overview
▪Project Summary▪Economics▪Technology▪Support▪Conclusions
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Iowa Stored Energy Park
An aquifer based storage system Combustion turbine technology
Bio-derived fuel compatible
CAPTURING THE POWER OF NATURE
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CAPTURING THE POWER OF NATURE
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CAPTURING THE POWER OF NATURE
Three parts to a CAES system
▪Storage▪Generation▪Compression
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CAPTURING THE POWER OF NATURE
Storage
▪Two existing CAES plants use mined salt caverns▪ISEP will use an aquifer▪Similar to natural gas storage techniques
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CAPTURING THE POWER OF NATURE
Generation- Conventional Combustion Technology
▪Compression– Separate and Replace▪Combustor- similar to existing▪Expander-similar to existing
▪High and low pressure sections
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CAPTURING THE POWER OF NATURE
Generation- Fuel
▪Two separate combustors▪High and Low Pressure
▪Investigating use of two fuels▪Natural gas▪Bio-derived fuels
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CAPTURING THE POWER OF NATURE
Compression
▪Use existing high efficiency equipment▪Proven track record – Air Separation Industry
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CAPTURING THE POWER OF NATURE
So how does CAES work with Wind ?
▪Increases off-peak system load▪Utilizes transmission when line ratings are high▪Provides voltage and frequency regulation
▪During either compression or generation
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CAPTURING THE POWER OF NATURE
Funding to Date
▪State of Iowa▪US DOE▪Iowa municipal utilities
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CAPTURING THE POWER OF NATURE
Status
▪Assessed all candidate sites in Iowa▪Completed seismic testing on best 2 sites▪Selected best site – west of Des Moines▪Building ownership / off-take portfolio▪Preparing to drill test wells and test fluid flow
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CAPTURING THE POWER OF NATURE
Supporters
▪Iowa municipals▪Local residents▪US DOE
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CAPTURING THE POWER OF NATURE
Summary
▪Preliminary analysis confirms feasibility▪Supports renewable energy needs▪Adaptation of proven technology▪Meets electric system technical/ market needs
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Iowa Stored Energy Park
“It’s The Responsible Thing To Do”
Why The Economics Make Sense
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CAPTURING THE POWER OF NATURE
Load Duration Curve
0
2
4
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0% 10% 20% 30% 40% 50% 60% 70% 80% 90%% Hours
Dem
and
MW
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CAPTURING THE POWER OF NATURE
Comparative Cost $/MWh
0
10
20
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40
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Coal-PC CC SC CAES
Compression
Fuel + VOM
Fixed Costs
$/MWh
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CAPTURING THE POWER OF NATURE
Cost Comparisons-Base EconomicsCost Comparisons-Base Economics
0
50
100
150
200
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10% 15% 20% 25% 30% 35% 40% 45% 50%Capacity Factor
$/MWh
Coal-PCCoal -IGCC
CCSC
CAES
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CAPTURING THE POWER OF NATURE
Energy Generation
0
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0% 10% 20% 30% 40% 50% 60% 70% 80% 90%
% Hours
Diesel
GT
CAES
Wind
Coal 2
Coal 1ISEP
Demand
in
MW
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CAPTURING THE POWER OF NATURE
Why ISEP?
▪Cheapest energy 10% < C.F. < 50%
▪Operational flexibility
▪Enhance value of wind energy
▪Protect against high gas prices
▪Protect against carbon tax
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CAPTURING THE POWER OF NATURE
Technology
Conventional Combustion Turbine
▪Expander Output 103 MW▪Compressor Load -59 MW
▪Gross CT output 44 MW
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CAPTURING THE POWER OF NATURE
CAES Machine
▪Expander Gross Output 103MW▪Air Flow optimization 9MW▪High Pressure expander 22MW
▪CAES Gross Output 134MW
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CAPTURING THE POWER OF NATURE
Thermodynamics
▪CAES▪1 kWh out = 0.75 kWh in plus 4400 Btu fuel▪With wind driving compression
▪Total heat rate = 6900Btu/kWh (HHV)▪F Class CT
▪Simple cycle 10000Btu/kWh (HHV)▪Combined cycle 7700Btu/kWh (HHV)
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CAPTURING THE POWER OF NATURE
ISEP — A Great Fit For Algona▪Proven source of renewable energy
▪Control costs by owning/investing in generation source
▪Good for the environment
▪Mix of generation sources helps risk mitigation
▪Consumers/owners want us to invest in renewable energy
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CAPTURING THE POWER OF NATURE
ISEP — Meeting Waverly’s Renewable Goals
▪Owned wind generation since 1991
▪Want storage from ISEP
▪Renewable goal: 20% by 2020
▪Intermediate capacity needs
▪ISEP helps Waverly meet its goals
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CAPTURING THE POWER OF NATURE
Why The Department Of Energy Backs ISEP
▪Increased demand anticipated
▪Federal mandates likely
▪Trends, challenges, and needs point to ISEP
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CAPTURING THE POWER OF NATURE
GROWTH IN
ENERGY CONSUM
PTION
ECOLOGICAL CONCE
RN
DIGITIZATION OF SOCIETY TRANSMI
SSION CONGES
TION
RENEWABLE
MANDATES
POWER OUTAGE
S
ELECTRICAL ENERGY STORAGE
INCREASED
CAPACITY
FACTOR
DISPATCHABILITY OF RENEWABLES
HIGH POWER QUALITY
SOLU
TION
TR
END
S
CH
ALLEN
GES
NEED
S
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Iowa Stored Energy Park
“It’s The Responsible Thing To Do”
What Energy Customers Say…
CAPTURING THE POWER OF NATURE
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CAPTURING THE POWER OF NATURE
We’ve Done Our Homework
▪Talked to 600 people
▪All lived in Dallas County
▪A strong majority support the idea
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CAPTURING THE POWER OF NATURE
Why Dallas County Residents Like ISEP:
▪Helps reduce/control MY household energy costs
▪Uses a resource (wind) not being used enough
▪Could decrease dependency on foreign energy
▪Could decrease dependency on fossil fuels
▪Is a clean and healthy source of energy
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Iowa Stored Energy Park
ISEP Funding So Far…
Leveraged $800,000 Municipal Funds
Received $3,500,000 Federal Funds
CAPTURING THE POWER OF NATURE
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CAPTURING THE POWER OF NATURE
Moving Forward
▪Leaving Research Phase▪Entering Development Phase
Research Development Construction ending 2007 -2009 2009 - 2011
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CAPTURING THE POWER OF NATURE
Conclusions
▪ISEP Answers wind’s shortcomings▪Diversifies the portfolio▪Helps meet intermediate capacity needs▪Helps manage coming renewable mandates
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Iowa Stored Energy Park
For more information:
Kent Holst ISEP Development Director319.239.8968
[email protected] www.isepa.com
CAPTURING THE POWER OF NATURE