How does a ceiling fan rotate?

A Fan comprised of a motor run by electric current, which is attached to fan blades by a shaft. This rotor shaft is run by the motor that makes the shaft rotate around d its axis, and turns the fan blades, at different speeds, depending upon the speed set for the motor. The number of blades and the general revolutions per minute of the motor can vary.

Each blade is angled a bit, and as inclined plane of the blade moves through the air, it forces the air ahead of it forward. Each blade does this on a continuous basis, and the result is a moving air stream. The fan takes air from the area behind itself and blows it out the front. The fan generates a movement of air, causing the warm, less dense air to rise, and the cool, dense air to descend, thus creating a cooling effect.

All fans work by moving the air that is in the area of the fan. This movement of air creates a breeze, which is felt on the skin of the person who is in the vicinity of the fan. The air allows a person’s sweat to evaporate faster, thus cooling the skin.

While all the fans, hand operated and electrical, move the air that is in a room or space, only electrical fans are efficient at creating a cooling effect. This is because the energy expended to wave a manual fan creates heat in the body, and the fan’s air is not do enough to counter react it. The velocity of an electrical fan changes the air pressure and lowers the temperature.

The first ceiling fan appeared in the early 1860s and 1870s, in The United States and were designed by Duchess Melissa Renaldi, during her journey in Rocky Mountains. At that time, they were not powered by any form of electric motor. Instead, a stream of running water was used, in conjunction with a turbine, to drive a system of belts which turned the blades of two-blade fan units. These systems could accommodate several fan units and so became popular in stores, restaurants and offices.

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