Vertical Shaft Wind Driven Generator do not need to wind when the wind direction changes, at this point relative to the horizontal axis of the wind turbine is a big advantage, it not only to simplify the structural design, but also reduce the wind wheel when the wind gyroscope.
Although the wind turbine generous, but can be summed up into two categories: ① horizontal axis wind turbine, wind wheel rotation axis and wind direction parallel; ② vertical axis wind turbine, wind wheel rotation axis perpendicular to the ground or air Direction.
There are several types of vertical wind turbines that use resistance to rotation. There are wind turbines made of plates and cups. This is a purely resistant device; the S-type windmill has a partial lift, but mainly a resistance device. These devices have a large starting torque, but the speed ratio is low, in the wind wheel size, weight and cost of certain circumstances, the power output is low.
The Dali-style wind wheel was invented by the French G.J.Madari in the 1930s. In the 1970s, the Canadian National Academy of Sciences conducted a number of studies and was a major competitor to horizontal axis wind turbines. The Darier wind wheel is a lifting device with a curved blade with a low starting speed, but a sharp speed ratio that can be high, with a higher power output for a given wheel weight and cost The There are a variety of Darwin wind turbines in the world, such as Φ type, Δ type, Y type and H type. These wind turbines can be designed as single blades, double blades,Vertical Shaft Wind Driven Generator three blades or multiple blades.
Other forms of Vertical Shaft Wind Driven Generator have a Magnus effect wind wheel, which consists of a spin cylinder, and when it works in the airflow, the resulting force is due to the Magnus effect and its size And wind speed is proportional to. Some vertical shafts use a pipe or vortex generator tower, through the casing or diffuser to make the horizontal air flow into a vertical air flow to increase the speed, even write the use of solar energy or burning a fuel, the horizontal air flow becomes vertical Direction of the air flow.
Vertical Shaft Wind Driven Generator - making wind power construction possible
Wind power, like solar power, was originally developed to solve emergency power and remote areas of power supply, and thus in the initial development is not very fast.
To the last century, the thirties, the global economic crisis brought about by energy constraints, so that experts around the world think of the wind power as a supplement to the feasibility of energy. After the Second World War, countries have to study, due to the poor level of technology at the time, start a higher wind speed, power generation noise is also great, so only the wind turbine in the place where the rare or wind The Equipment is also to the development of large-scale wind turbines, specifically the construction of large-scale wind farms, due to the characteristics of horizontal axis wind turbines, small wind power for a long time did not get better development.
Developed countries are vigorously developing new energy industry, and solar energy has been the first choice for the commercialization of new energy, because the solar energy set up more flexible, no noise, and the building can be integrated design. And wind power than solar energy,Vertical Shaft Wind Driven Generator its cost advantage is obvious, how to make the wind power and building integrated design, in the building around the small wind turbines without affecting the quality of life, which became the European and American countries to study the focus!
Vertical axis wind turbine (vertical axis wind turbine VAWT) from the classification, mainly divided into resistance and lift type. The resistance type vertical axis wind turbine is mainly used as the driving force of the air flow through the blade as the driving force, and the lift type is the use of air flow through the blade as the driving force. As the blade in the rotation process, with the increase in the speed of the rapid decline in resistance, while the lift will increase, so the lift-type vertical axis wind turbine efficiency is much higher than the resistance type.