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Spring Motors for Energy Storage

IP.com Disclosure Number: IPCOM000202036D
Original Publication Date: 2010-Dec-02
Included in the Prior Art Database: 2010-Dec-02
Document File: 3 page(s) / 185K

Publishing Venue

Siemens

Related People

Juergen Carstens: CONTACT

Abstract

Wind energy varies in intensity and continuity, from place to place, and from time to time. This results in an inequality of energy supply through the wind turbines. For example, wind turbines have to be shutdown, which means 100% loss of wind energy, in case of a long turbulence or less electric energy can be produced on less windy days. In order to keep a nearly constant amount of energy supply and to guarantee a nearly constant price for turbine-supplied electricity, it is necessary to store energy in reasonable ways to achieve a compensable balance between needed energy and available energy. There are different methods for temporary energy-storage using different storage media, which can be generally grouped into eight main categories: mechanical energy (e.g. flywheels for storing transferred kinetic energy), chemical energy (e.g. traditional batteries, hydrogen storage), thermal energy (heat exchange), electrical energy (e.g. ultra-capacitors), pneumatic energy (e.g. compressed air), hydraulic energy (pumped water), potential energy (lifting of objects), and magnetic energy (objects providing superconducting magnet). Temporarily stored energy can be transferred backwards to or fed into the flow of electrical energy.

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Benitez-Sanchez, DE-Aachen

Wind energy varies in intensity and continuity, from place to place, and from time to
in an inequality of energy supply through the wind turbines. For example, wind turbine shutdown, which means 100% loss of wind energy, in case of a long turbulence or can be produced on less windy days. In order to keep a nearly constant amount of e to guarantee a nearly constant price for turbine-supplied electricity, it is necessary to reasonable ways to achieve a compensable balance between needed energy and

There are different methods for temporary energy-storage using different storage generally grouped into eight main categories: mechanical energy (e.g. flywheels fo kinetic energy), che
exchange), electrical energy (e.g. ultra-capacitors), pneumatic energy (e.g. compres energy (pumped water), potential energy (lifting of objects), and magnetic energ superconducting magnet). Temporarily stored energy can be transferred backwards flow of electrical energy.

The idea is to store energy by converting superfluous electrical energy into mechani central spring motor (or separated spring motors) and backwards once energy dem Normally, turbine-produced electricity will be fed into grid (see Figure 1, switch o consumed by customers. If produced electricity is beyond customer's demand, it
to a central block (see Figure 2, switch on position 2) and it can be converted into by winding a central spring motor up. By unwinding the spring motor on deman
be released
This spring motor is used as a central energy storage unit. Therefore it provides spiral wound springs connected in series to allow the storage of large amount o

As a variant solution, smaller separate spring motors can be placed in the nacelles wind turbines and can be switched individually as

Spring Motors for Energy Storage

Idea: Ying...