Реферат: Wind Power Essay Research Paper The wind

Storing the wind’s energy effectively is the key to its long-term

use. Windmills used as water pumpers or air-compressors can pump excess

water, hydrogen or air into reserve tanks. Today, there are a number of

ways to store the wind’s energy. Windmills

are used to charge Electrolyte batteries. Lead-acid or Lead-cobalt car

batteries are commonly used as well. However, batteries may be expensive

and inefficient–they may lose 10-25% of the energy stored in them.

Nickel-Iron, Nickel-cadmium, and zinc-a ir cells are often used as well.

These tend to be more efficient. Some windmills are now using organic

electrolyte batteries such as CuCl2, Ni Cl2, and NiF2 batteries as well as

sodium-sulfur batteries, which operate at high temperature, are used.

Although uncommon and still in experimental phases, some energy is

stored not by being converted directly into electrical energy, but rather

by being stored as thermal or electromagnetic energy,

Sound Fluids are elastic. Pressure waves are constantly being created and

propagated by the aerofoils and the turbine as a whole (entire components

excepting the support). We can hear them in the sound given off. The

sound intensity is directly proportional with the speed of the windmill.

The frequency of the waves is directly proportional to the angular speed

of the blades on the rotor. The flutter you hear has aerodynamic and

elastic properties. The higher speed the aerofoils are, the louder the

sound a nd the louder the flutter they will make, as more pressure waves

are being created and propagated. The generators are noisy. They often

confuse birds and cause them to fly towards the turbine. Windmills can be

very noisy. A 300 kW turbine at 1 mile away has a dB level equal to a

traffic light 100 feet away (Gipe). Windmill sound levels are regulate d.

The sound level must be kept under 46 dB in a residential area. Wind

turbines can cause interference, disturbances with TV and radio reception

(ghost images on TVs), affect microwaves and disrupt satellite