Patent Application
20100181775
The present invention relates to a wind power electricity generation system and particularly to a wind power electricity generation system which can reduce the starting wind power.
Wind power electricity generation is a most clean natural electricity regeneration source, thus is a widely endorsed eco-friendly power solution. References can be found in Taiwan patent application No. M296920 “Thermal wind power electricity generation system”, No. M307718 “Vehicle wind power electricity and light generation apparatus”, No. M326072 “DIY wind power electricity generation wall”, No. M329580 “Flow directing structure with reduced air resistance” and the like. They all try to generate electric power through the wind power. They produce no pollution and can be made at a lower cost, thus are widely accepted.
The aforesaid wind power electricity generation systems drive rotary blades to rotate through the kinetic energy of wind, then drive an electric generator to rotate and generate electric power. The wind has to reach a selected amount of power to rotate the blades, generally called starting wind power, to begin operation. As most wind power electricity generation systems are installed close to residence areas, the wind power generated in such environments cannot always be greater than the starting wind power for a long enough duration. Hence many wind power electricity generation systems cannot start as desired or can only generate very small amount of electricity. This seriously hinders applications and deployment of the wind power electricity generation.
Therefore, the primary object of the present invention is to provide a wind power electricity generation system that is operable with low starting wind power to expand its deployments and applications.
To achieve the foregoing object, the wind power electricity generation system according to the invention includes a wind shade, a rack, a rotary means and a wind directing means. The wind shade has an air passage. The rack is fixedly located in the air passage of the wind shade. The rotary means has a plurality of rotary blades mounted on the rack in a radial manner and rotatable thereon. The wind directing means has a plurality of fixed vanes mounted on the rack in a radial manner and close to a front end of the rotary means.
By means of the structure set forth above, the wind directing means can channel airflow direction entering the air passage and accelerate wind speed and direct the wind at an optimal angle to rotate the rotary means. Hence the rotary means can be driven by a small wind and rotate. Namely the starting wind power is lower, and efficiency can increase and electricity generation amount produced through the wind power also is greater. Deployments and applications of the wind power electricity generation can also be expanded.
The foregoing, as well as additional objects, features and advantages of the invention will be more readily apparent from the following detailed description, which proceeds with reference to the embodiments below and accompanying drawings. The embodiments serve only for illustrative purpose and are not the limitations of the invention.
Please refer to
The wind directing means 40 has a plurality of fixed vanes 41 formed in a radial manner and close to a front end of the rotary means 30. The wind shade 10A has a latch trough 12 to be wedged in by the fixed vanes 41 for anchoring. The rotary blades 31 and fixed vanes 41 are preferably formed in three pieces respectively.
The rotary blades 31 may be formed with a selected twisting curvature while the fixed vanes 41 are formed with another twisting curvature inverse to the rotary blades 31 to allow wind to be channeled at an optimal angle to the rotary means 30. The rotary blades 31 may also be formed in an area gradually shrunk outwards from the rotation center, while the fixed vanes 41 are formed in another area gradually enlarged outwards from the center. The rotary blades 31 and fixed vanes 41 also have a thicker aweather wind surface than the lee wind surface to reduce wind resistance and expand wind receiving area to enhance efficiency. The air passage 11 may be extended rearwards to form a conical shape behind the rotary means 30 so that it has an outlet larger than an inlet to reduce the back pressure of the wind passing through the air passage 11.
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As a conclusion, the present invention provides the wind directing means 40 to channel the airflow direction 70 of the wind so that the wind accelerates and blows the rotary means 30 at the optimal angle to rotate. Therefore, the starting wind power can be reduced and efficiency improves, and electric power generated through the wind increases. Thus applications of wind power electricity generation can be greatly expanded.
