What are the functions of wind? (Grade 2)

Introduction What are the functions of wind? (Grade 2) Functions of wind: 1. Wind can dry water on clothes, make people cool, make fires stronger, propel sailboats, spread pollen, etc. 2. People use windmills to push

What are the functions of wind? (Grade 2)

Function of wind:

1. Wind can dry water on clothes, make people cool, make fires stronger, propel sailboats, spread pollen, etc.

2. People use windmills to grind mills, pull bellows to blow fires, and electric fans to blow cool air; sailboats use the wind to sail, and gliders use the power of the wind to fly into the sky.

3. Wind power has no pollution and is inexhaustible. It is an ideal power source.

4. Adjust the temperature difference of the atmosphere to change the temperature.

Wind is good for people, but it is also harmful. The energy of wind is very large, and the wind on the earth never stops. Because the earth revolves around the sun, there are always places on the earth that are cold. It's hot in some places, so there are all kinds of wind blowing constantly.

Extended information:

< p>Wind data is one of the important meteorological data, which is indispensable both in theoretical research and in various departments of national economic construction, such as agriculture, transportation, construction, water conservancy projects, recuperation and other departments.

Wind is the horizontal movement of air and is a vector (or vector) represented by direction (wind direction) and speed (wind speed). Wind direction refers to the direction from which the wind comes, except for calm wind, which is expressed in 16 directions.

Wind speed refers to the ratio of the distance traveled by the air to the time required for the distance traveled. The unit is expressed in meters per second. It is observed regularly (the basic station observes 4 times a day, and the base station observes 24 times a day). ), take an integer, self-recorded, take one decimal place.

The working principle of wind turbines (the future of renewable energy)

1. Water lifting by wind:

Wind lifting has been carried out since ancient times is widely used.

2. Wind power generation:

Wind power generation usually has three operating modes:

(1) It is an independent operation mode, usually a small generator is used to generate electricity. One or several households provide electricity, which uses batteries to store energy to ensure power usage when there is no wind.

(2) Wind power generation is combined with other power generation methods (such as diesel engine power generation) to provide power to a unit, a village or an island.

(3) Wind power generation is integrated into the conventional power grid to provide power to the large power grid. Often dozens or even hundreds of wind turbines are installed in a wind farm, which is the main development direction of wind power generation.

3. Sail to assist navigation:

In the development of today's motor boats, in order to save fuel and increase speed, ancient sails have been developed.

4. Wind heating:

With the improvement of people's living standards, the demand for heat energy in household energy is increasing, especially in high latitudes in Europe and North America. Drinking water is a major energy consumer. Wind heating has been greatly developed to solve the heat energy needs of households and low-level industries..

Extended information:

< p>Wind energy advantages and disadvantages

1. Advantages

Wind energy is a clean energy source. Wind energy installations have become more advanced, mass production has reduced costs, and in the right locations, wind power is now less expensive than other generators. Wind energy facilities are mostly non-three-dimensional facilities that can protect the land and ecology. Wind power is a renewable energy source that is environmentally friendly and clean. Wind power is energy-saving and environmentally friendly.

2. Disadvantages

The ecological problem of wind power is that it may disturb birds. For example, the grouse in Kansas, USA, have gradually disappeared after the emergence of windmills. The current solution is offshore power generation, which is more expensive but also more efficient.

In some areas, the economics of wind power generation are insufficient, and the wind in many areas is intermittent. What is worse is that in places such as Taiwan, there is less wind in summer and during the day when power demand is high. time; must wait for the development of energy storage technologies such as compressed air.

Wind power generation requires a large amount of land to build wind farms to produce relatively large amounts of energy.

When wind power is generated, the wind turbine will make a lot of noise, so it is necessary to find some open areas to build.

Current wind power generation is not yet mature and there is still considerable room for development.

Baidu Encyclopedia - Wind Energy

Wind turbine is a device that uses wind energy to convert into electrical energy. It drives a generator to generate electricity through the rotation of a wind wheel. The working principle of wind turbines mainly includes three processes: wind energy conversion, mechanical energy conversion and electrical energy conversion.

1. Wind energy conversion

Wind is the result of atmospheric movement on the earth and has huge energy. The conversion process of wind turbines using wind energy is to convert wind energy into kinetic energy on the wind wheel. When the wind blows through the rotor of the wind turbine, the rotor is rotated by the force of the wind.

2. Mechanical energy conversion

The rotation of the wind wheel will drive the rotor inside the generator to rotate. The rotor is composed of magnets and coils. When the rotor rotates, the magnetic field also changes. According to Faraday's law of electromagnetic induction, changes in the magnetic field will induce an electromotive force in the coil. This electromotive force is transmitted to the output of the generator through the wire, forming an electric current.

3. Electric energy conversion

The current transmitted through the wire will be further converted into electric energy through the transformer. Transformers convert low-voltage current into high-voltage current so that electrical energy can be delivered more efficiently. Ultimately, the electrical energy is transmitted through transmission lines to users for their use.

Operation steps of wind turbines

1. Site selection

The site selection of wind turbines is very important. Generally speaking, you need to choose an area with high and stable wind speeds, to ensure that wind turbines can continue to produce electricity. At the same time, it is also necessary to consider the surrounding environmental factors, such as the impact of terrain, buildings, etc. on the wind.

2. Installation foundation

After the site selection is determined, the foundation installation of the wind turbine needs to be carried out. This includes work such as digging foundation pits and pouring concrete. The stability of the foundation is crucial to the normal operation of wind turbines.

3. Install the wind wheel and generator

After the foundation is installed, the wind wheel and generator need to be installed on the foundation. Wind rotors usually consist of several blades, which need to be installed perpendicular to the direction of the wind to maximize the use of wind energy.

4. Connect the transmission lines

After the installation is completed, the wind turbine needs to be connected to the transmission lines. This requires cabling and connection work. Ensuring the reliability and security of connections is critical to the transmission of electrical energy.

5. Operation and monitoring

After completing the installation and connection, the wind turbine can start operation. At the same time, operational monitoring is required to detect and solve possible problems in a timely manner to ensure the normal operation of wind turbines.

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