Method and device for improving performance of resistance-type vertical axis wind turbine

Abstract

The invention discloses a method and a device for improving performance of a resistance-type vertical axis wind turbine, which belong to the fields of design, manufacture and application of wind turbines and are used for remarkably improving the pneumatic performance of the resistance-type wind turbine. The upwind side of the conventional resistance-type wind turbine is provided with an additional device capable of rotating along with the wind, the additional device is practically a contraction-expansion pipeline, and the inside at the throat of the pipeline is provided with an air suction port; and when the wind flows, a negative pressure area is formed at the air suction port due to the generated venturi effect to cause low pressure at the upwind side of the wind turbine and further greatly reduce the operating resistance thereof; and the rotating speed of the wind turbine is increased, and the torque thereof is improved, so the power coefficient of the wind turbine is remarkably improved. The device has the advantages of simple structure, low manufacturing cost and convenient implementation, can work more efficiently at the low wind speed area, can work safely under the condition of higher stop wind speed, and shows greater advantage in strong wind, so the annular power generation quantity is remarkably improved. Meanwhile, the wind turbine can be applied in ocean current and tide environments.

Description

technical field [0001] The present invention relates to a resistance type vertical axis wind turbine, specifically on the upwind side of a common resistance type vertical axis wind turbine, by installing an appropriate device, the resistance generated on the upwind side of the rotor blades is reduced to improve The aerodynamic performance of wind turbines belongs to the field of wind turbine design, manufacture and application. Background technique [0002] Wind energy is the most promising, fastest-growing and relatively mature new energy, but the key factor restricting the development and utilization of wind energy is the high cost and selling price of wind power. The main method to reduce the cost of wind power is to significantly increase the power coefficient of the wind turbine, thereby increasing the annual power generation of the wind turbine; the first is to do everything possible to reduce the manufacturing and maintenance costs of the wind turbine (complete machin...

AI Technical Summary

Problems solved by technology

Generally speaking, although the start-up wind speed of various wind turbines is different, the cut-off wind speed is generally 25m / s; and the wind energy is proportional to the third power of the wind speed, that is to say, we only use the lower wind speed However, the considerable wind energy during the high wind has to be given up, which is undoubtedly a great waste for the windy areas such as Gansu, Xinjiang and the windy areas on the sea! Therefore, if the power coefficient can be effectively improved, there is no doubt that the use of resistance-type vertical axis wind turbines in the windy area will be the only wise choice in the future market!

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