The super flywheel storage of kinetic energy.
The super flywheel is one of the types of flywheel intended for storage of mechanical energy. Unlike conventional flywheels are able to store more kinetic energy. Due to the design features capable of storing up to 500 WH (1.8 MJ) per kilogram of body weight.
The super flywheel is one of the types of flywheel intended for storage of mechanical energy. Unlike conventional flywheels are able to store more kinetic energy.
Due to the design features capable of storing up to 500 WH (1.8 MJ) per kilogram of body weight.
The super flywheel was first invented in 1964 by the Soviet scientist N. Gulia.
Modern super flywheel is a drum, made of composite materials, for example, is wound from thin steel coils, plastic strips, fiberglass, carbon composites or graphene paper. This ensures a high breaking strength and safe operation. In case of physical destruction of the super flywheel does not scatter in large part as a conventional flywheel, and partially destroyed; at the same time separated part of the brake drum and prevent further destruction. To reduce friction losses the super flywheel is placed in a vacuumed enclosure. Often used magnetic suspension.
Finished look super flywheel takes when he is able to store and deliver power. This creates a motor–generatorwhere the stator is a drum, and rotor — the axis around which it rotates. Thus, when you connect to the network it will store energy, and when connecting the load to give. The maximum efficiency of this conversion reaches 98 %.
– durability. Has a great cycle life compared to other devices
– safe destruction,
– high efficiency – up to 98%,
– easier and cheaper to manufacture than batteries,
– ecologically friendly, do not harm the environment
– stores much more energy in significantly less time than batteries. Also gives,
– work in any temperature regime,
– can be used as a buffer source of peak power in combination with other devices for storing energy, such as batteries,
– maximum time to store energy in contrast to other devices.
|Features:||Battery||Supercapacitor||The super flywheel|
|Power consumption, W·h/kg||150||15||500|
|The number of cycles||103||106||105|
|Life cycle, years||3-5||10||more than 20|
The kinetic mechanical energy is transmitted to the super flywheel and back from the super flywheel with rotor – motor-generator which is also able to convert the kinetic mechanical energy back into electricity.
The super flywheel works in two modes: in the mode of energy accumulation and the mode of bestowal. When working in the mode of storing energy input energy creates torque on the shaft and increases the rotational speed of the flywheel. In a reverse process – the stored kinetic energy is converted into power generating torque on a shaft of the motor-generator and subsequently into electrical energy.
The super flywheel is charged from the motors, energy recuperation during braking, from stationary energy sources, as well as from input electric power. In the latter case, the motor-generator operates as a motor that creates the torque on the shaft.
The amount of stored energy is proportional to the inertia of a rotating body of the flywheel is J and the square of the angular speed ω. It is determined according to the formula: Ek=1/2*J*ω2.
The formula shows that is stored in the flywheel kinetic energy has a linear dependence on the moment of inertia of the rotating mass of the flywheel body and a quadratic dependence on the rotational speed. Accordingly, the growth speed of the number of reserved energy will grow exponentially.
The spread of Autonomous sources of energy generation requires storage. Methods of storing energy differ by many parameters such as output power, number of reserved energy, storage time, number of cycles of charge/discharge, weight, overall dimensions, energy consumption, efficiency, cost.
The super flywheel is a modern and high-tech energy-efficient alternative to different ways of accumulating and storing energy such as the batteries are dead, supercapacitors, other energy storage devices and systems with compressed air, pumped storage power plants.