Level 8
Wind force refers to the strength of the wind blowing on objects. Generally, the wind force is divided into 18 levels according to the various phenomena caused by the wind blowing on objects on the ground or water surface, with the minimum being level 0 and the maximum being level 17.
In terms of meteorology, wind is generally divided into twelve levels according to its strength:
1. Level 0 wind is also called calm wind.
2. Level 2 wind is called light breeze, the leaves make a slight sound, and the face feels windy.
Level 3 and 4 winds are called gentle breezes. The branches of the trees are shaking, which can blow up dust and paper on the ground.
Winds of level 4 and 6 are strong, big branches are swaying, power lines are whirring, and it is difficult to walk with an umbrella.
Winds of level 5 and 8 are called strong winds. The twigs of trees can be broken, and the resistance to walking in the wind is very great.
6. Level 10 winds are called squally winds and are rare on land. They can uproot trees and cause serious damage to buildings.
7. Winds above level 12 are called typhoons or hurricanes, which are extremely destructive and rarely seen on land.
Principles of wind power generation
Convert the kinetic energy of the wind into mechanical kinetic energy, and then convert the mechanical energy into electrical kinetic energy. This is wind power generation. The principle of wind power generation is to use wind power to drive the windmill blades to rotate, and then use a speed increaser to increase the speed of rotation to prompt the generator to generate electricity. According to current windmill technology, power generation can begin at a breeze speed of approximately three meters per second (the degree of breeze). Wind power is becoming a craze around the world because it does not require the use of fuel and does not produce radiation or air pollution.
The devices required for wind power generation are called wind turbines. This kind of wind turbine can be roughly divided into three parts: wind wheel (including tail rudder), generator and iron tower. (Large-scale wind power stations basically do not have tail rudders. Generally, only small ones (including household types) have tail rudders)
The wind wheel is an important component that converts the kinetic energy of the wind into mechanical energy. It consists of two (or more) propeller-shaped impellers. When the wind blows towards the blades, aerodynamic force is generated on the blades to drive the wind wheel to rotate. The blade material requires high strength and light weight. Currently, it is mostly made of fiberglass or other composite materials (such as carbon fiber). (There are also some vertical wind wheels, S-shaped rotating blades, etc., which have the same function as conventional propeller-type blades)
Since the speed of the wind wheel is relatively low, and the magnitude and direction of the wind force often change, This in turn makes the speed unstable; therefore, before driving the generator, a gearbox must be attached to increase the speed to the rated speed of the generator, and a speed regulating mechanism must be added to keep the speed stable, and then connected to the generator. In order to keep the wind rotor always aligned with the wind direction to obtain maximum power, a tail rudder similar to a wind vane needs to be installed behind the wind rotor.
The iron tower is the structure that supports the wind wheel, rudder and generator. It is generally built relatively high in order to obtain larger and more uniform wind force and to have sufficient strength. Effect of tower height on wind speed due to ground obstaclesIt depends on the noise situation and the diameter of the wind wheel, generally in the range of 6-20 meters.
The function of the generator is to transfer the constant rotation speed obtained from the wind wheel to the power generation mechanism through increased speed for even operation, thereby converting mechanical energy into electrical energy.
Brand nissey
Model micro-small
Rated power 1.4 (W)
Wind wheel diameter 0.2 (m)
Delivery within 30 days
Rated wind speed 10 (m/s)
Micro wind turbine
As long as there is The wind that can shake the leaves can generate electricity, and it is small in size and light in weight, with a blade diameter of only 20cm. Thanks to the unique silent setting, it can be arranged anywhere with confidence. It can generate 1.5w of electricity when the wind speed is 10m/s. Even the electricity generated by ordinary weak wind is enough to drive the use of various LED applications and sensors. It is more convenient to use secondary generators in areas where power engineering wiring is difficult. It can be used as a small power supply, emergency power supply, etc.
Features:
1. Breeze speed: As long as the wind force that can shake the leaves is about 1.5 meters/second, it can generate electricity
2. Small size and light weight, can be easily set up anywhere
3. Durability, low noise
4. Used together with solar cells, etc. for higher efficiency
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5. Possible power conversion corresponding to capacitors, rechargeable batteries, etc.
Scope of application:
1. In private gardens Power generation for garden lights, night lights, etc.
2. Decorative power for outdoor use
3. Power supply for outdoor use (for cabins on the mountain, camping tents, and boats)
4. Road signs, wind speed, wind direction tester
5. Work, interests, study materials, etc.
6. Small power generation for home use
Specifications:
Appearance: 300mm long (130mm body, 200*45mm wing diameter)
Material: ASE resin
Weight: Body: 300g
Power: about 1.4W, when the wind speed is 10m