ISEP will be a valuable asset, allowing Iowa
and the Upper Midwest to produce more environmentally-friendly electricity
With hundreds of millions of dollars invested in construction, the Iowa Stored Energy Park (ISEP) will provide significant economic benefits for the state of Iowa
and the Upper Midwest. ISEP is a joint project of municipal utilities in Iowa and several nearby states.
ISEP will be located in central Iowa,
next to a very good wind energy resource.
ISEP will use the energy from wind
facilities and other resources connected to
the regional electric power grid to store air in an underground geologic structure
during time periods of low customer electric
demand and high wind. Then, during peak
customer power demands and when the wind is
not blowing, the stored air will be released, mixed with
natural gas and used to power combustion turbines that produce environmentally friendly and economical electricity.
ISEP will utilize some of the latest innovations in the generation of electricity. Wind turbines, deep underground air storage, and efficient combustion turbines will be used by ISEP to take the variability of wind and turn it into clean energy on demand.
The project will enable utilities and their
customers to add more renewable wind energy to their power supplies
then they could otherwise.
Compressed Air Energy Storage (CAES) enhances wind power
In a CAES at the ISEP facility, air will be compressed using low-cost, off-peak electricity, and wind that is not being sold on the grid at that time. The air is stored in a deep underground geological formation for later use in making electricity. When
electric energy is needed and the wind
is not blowing, the stored air will be released, heated
with natural gas and used to drive generating turbines. The electricity it produces can be used as needed, especially during high-demand peak hours. This process uses less fuel than a conventional
natural-gas fired combustion-turbine
By using compressed air energy storage and wind power together, an environmentally friendly, alternative energy source is available to homes and businesses.
(Flash 8 is required to view CAES Demo animation). Download CAES demo animation by clicking here.
In 2003, interested members of the Iowa Association of Municipal Utilities
(IAMU), a group representing publicly-owned utilities in Iowa cities, formed a study committee to develop the concept of the Iowa Stored Energy Park. In 2005, the IAMU committee passed responsibility for ISEP to the Iowa Stored Energy Plant Agency (ISEPA), an Iowa corporation formed under
Section 28E of the Iowa Code. Today,
the members of ISEPA represent 95 municipal
utilities located in Iowa, Minnesota, North
Dakota, and South Dakota.
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