DE102010004210A1 - Energy storage method for carbon di-oxide free energy supply for cities, homes and buildings, involves storing electrical energy in kinetic energy storage with integrated motor or generator and defining system in vacuum - Google Patents

Abstract

The energy storage method involves storing electrical energy in kinetic energy storage with integrated motor or generator, defining a system in vacuum (4) and discharging the energy loses into environment. A controller is provided for energy management. A motor or power electronics principle is applied with certain electrical efficiency.

Description

CO2 - free energy is the future acceptable way to develop and structure economic and transport systems. This is a big challenge for today's industrial society. In particular, a resource-conserving energy utilization and energy recovery, where possible, is the goal of new innovations. These are the focal point of current developments, both in the stationary and the mobile sector, in contributing to CO2 reduction. However, the energy supply and the energy storage, for z. For example, the night - with solar power generation - a special challenge. One possible solution for efficient, sustainable energy storage is the energy stored in a kinetic energy store.

Status of the energy industry

Today's energy sources are usually fossil fuels, both in the power plant and the automotive sector. Increasingly, synthetic energy sources are becoming increasingly interesting due to resources. However, energy storage is not yet an optimal solution. A hydrogen economy via renewable energies, especially solar electricity, is an interesting approach. However, storage is not yet efficiently solved for all applications.

suggestion

For a CO2 - free energy supply of a city incl. Traffic, a concept based on regenerative (solar and wind energy) is presented, see patent application: AKTZ of the Patent Office: 10 2009 058 335.1. The concept can be implemented 100% in regions with medium to strong solar radiation. Here, the KSP (kinetic storage concept) is particularly described to represent an optimal overall system.

1. Construction of a Kinetic Memory (FIG. 1):

The houses are equipped with solar cell modules that cover both the daily needs and the night needs. Each residential unit has its own energy storage, preferably a kinetic storage (KSP). The supply is thus ensured at night, should the energy be insufficient, the supply is ensured via the public network.

The concept sees you in a vacuum ( 4 ) running rotor (kinetic mass, 6,) with integrated electric motor / generator ( 2 ; 5 ) in front. This is dimensioned so that at least the night requirement of a residential unit is well covered (maximum electrical capacity is multiplied by time, E = P × t, in kWh). The cooling ( 9 ) is also integrated in the system, whereby this depends particularly on the location, If a KSP be embedded in the ground, it is sufficient to deliver the heat loss to the ground. The fixed shaft ( 1 ) the system picks up, this can only be seen as an example, depending on the bearing principle. There are basically other structures, such. B. execution of a freely rotating mass, conceivable. The whole is in a vacuum-tight housing ( 3 ). The control and regulation of the motor / generator are not necessarily at the rotating mass ( 8th ). Depending on the detailed requirement profile, the losses due to the storage or the friction losses of the high-speed mass, the storage ( 7 ). This may be both a grease lubricated hybrid ball bearing and, if the losses are very low, passive / active magnetic bearing. In the latter concept, of course, combinations of passive / active storage are conceivable. The system is gimbaled, but with the free-rotating mass concept, this is not necessary.

2. Parameter definition

• • Umfangsgeschwindigkeit der Schwungmaße Diese ist natürlich werkstoffspezifisch und für hochdrehende Systeme sind Detailkonstruktion und Design maßgebend für die Ausführung. Die Umfangsgeschwindigkeit sollte >> 500 m/s sein.
• • Aufgrund einer ausgewogenen Rotordynamik ist die Rotorlänge sinnvoll zwischen 0,5 und 1,3 m einzuordnen, wenn nicht zu große Energien bei Leistungen < 10 kW, die für akzeptable Wohneinheiten ausreichen sollten.

The parameters that provide efficient and inexpensive storage are as follows:

• • Circumferential speed of the flywheels This is naturally material-specific and for high-speed systems detailed design and design are decisive for the design. The peripheral speed should be >> 500 m / s.
• • Due to a balanced rotor dynamics, the rotor length is reasonable to be classified between 0.5 and 1.3 m, if not too large energies with outputs <10 kW, which should be sufficient for acceptable housing units.

A characteristic value is defined which may be of particular interest for stationary systems for solar technology: KSP - Stationary characteristic definition evaluation criterion description Unit of measurement example Peripheral speed of the flywheel C _uma m / s 500 Inertia length Lm m 0.5 energy content e kWh 2 Electric power P kW 0.2 KSP characteristic, stationary C _uma · E / P · Lm - 10000

The characteristic value makes sense, depending on the detail requirement, between 1 000 and 400 000.

Claims (10)

Saving electrical energy in a kinetic energy store with integrated motor / generator In particular, characterized in that it is operated at very high speed at the material load limit of the flywheel dimensions. The system is in a vacuum The losses are preferably dissipated to the environment A KSP characteristic, as defined above, is between 1,000 and 400,000. An engine / power electronics principle with an overall electrical efficiency (energy delivered to pure energy) of> 70% is realized In a concept which has a non-rotating mass, a gimbal is provided to avoid additional bearing loads Mass preferably in CFK or GFK The control / regulation does not necessarily have to be at the memory The power electronics may also have further control element, for. B. Control of energy management

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