Energy from the air

Aircraft with propellers and helicopters fly, throwing air away from them. Windmills also regularly wave their blades, but do not fly anywhere, although they have a screw. The air, moving relative to the fixed propeller itself rotates it. This is how energy is generated from the air.

This is how energy is generated from the air

Today you can often see the relatives of windmills - wind turbines or wind farms. Over the height of 100 m, they stand, in groups and alone, generating energy from the air. Many countries, for example, the USA and Germany, thus extract energy from the air and want to get rid of nuclear power plants in the near future.

Wind power plants are mainly divided into two types - with a horizontal axis of rotation of the propeller and with a vertical one. The most common is the first type of wind power plants. Wind turbines may have a different number of blades - three, two, and even... one balanced counterweight!

At the top of the wind turbine tower is located the engine room. It has the dimensions of a decent apartment and weighs approximately 100 tons. Machines are placed there to convert the rotation into electricity, and thus the extraction of energy from the air. Since the blades turn slowly - 30-40 revolutions per minute, and the generator shaft must have at least 1500 - 1800 revolutions per minute, there is an overdrive between them - a multiplier weighing about 10 tons.

Of course, a windmill produces free energy from the air, but the wind does not always blow, and if it does, it does so with varying force. As a result, the power of a wind farm is far from constant, which cannot be attributed to its merits. Therefore, when opportunities permit, windmills are combined in networks, most often with the general energy system of a country or region.

And what to do with frequent calm? Then, you need a diesel-electric installation, which starts automatically when it is calm. But often run this installation is not profitable. Therefore, using different types of batteries energy derived from the air - electrochemical, as in automobiles, flywheel, capacitor. Electrochemical store considerable energy, but the roads are short-lived, do not work well in cold weather and have low efficiency. Capacitors are durable, but also expensive, and energy is stored hundreds of times less (per unit mass) than electrochemical ones. Flywheel drives are energy intensive, durable, have high efficiency... But, a good flywheel drive with small internal losses is very expensive. How can a flywheel drive be used to extract energy from the air?

From the wind-wheel, the long shaft goes down and through an overdrive, for example, a chain drive, rotates a generator with a flywheel or even a super flywheel sitting on its shaft. The flywheel is placed in the housing, from which air is pumped out to reduce the energy loss for rotation. The flywheel accelerates during gusts of wind and gives off energy during pauses. If the tower of the power station is very high, the generator is connected by electric wires to the generator of the flywheel, forming the so-called electric shaft. Normal shaft then no longer needed. Calculations made by wind power specialists have shown that in most cases there is enough energy in the flywheel for 56 minutes of a wind farm operating at full power. Then the diesel-electric installation will have to run very rarely.

If there is a vertical shaft, and it is almost always present on windmills of average power, then the Joule mixer, which is easy to prepare, for example, from a large 200-liter drum, can be directly connected to its lower part. This mixer converts mechanical energy into heat. When the wind wheel rotates, the water in the mixer, stirred by the blades, heats up. Hot water through the pipes can be directed to the radiators of houses or for other purposes.