Semi-submersible ocean power generation method and device

Abstract

The invention discloses a semi-submersible ocean power generation method and device. The method is implemented by separately constructing an offshore platform or based on an existing offshore platform; the power generation device and an impeller mechanically coupled to the power generation device are installed on the platform; blades of the impeller are arranged perpendicular to the flow directionof fluid along the water surface; the upper part of the impeller is on the surface of the sea and the bottom part of the impeller is submerged into the sea; the ocean power pushes the impeller to rotate and thus drives the power generation device to generate electricity; when the blades move in the circumferential direction, the blade parts underwater act under a continuous fluid thrust, and theblade parts in the air will not be affected by the fluid impact resistance even if the moving direction is opposite to the flow direction of the fluid; in this way, the work loss is greatly decreasedand generation efficiency is improved. In addition, the design of the rotate wheel of the impeller and the structure of the blades can increase the thrust force borne by the impeller main shaft, therefore reduce water energy loss and increase conversion efficiency of ocean energy; and a casing sleeving the impeller can screen sea breeze from different directions and reasonably utilize the thrust force of the wind from the same direction to improve the generation capacity of the power generation device.

Description

technical field [0001] The present invention relates to an offshore power generation equipment, in particular to a method and device for ocean energy power generation. Background technique [0002] In the 21st century, human beings mainly rely on fossil energy such as oil and coal to meet human needs, but the above-mentioned non-renewable energy will eventually be exhausted one day, and human beings may face a serious energy crisis. Therefore, to promote the development of clean energy The application, reduction of pollution, and improvement of energy efficiency are particularly important, providing a strong backing for the development and utilization of the ocean. The ocean contains abundant energy, such as wave energy (transverse wave), tidal current energy (directional wave), ocean circulation ( Surface circulation), etc. These energies have the advantages of high energy density and wide distribution, and are an inexhaustible renewable clean energy. [0003] Wave energy ...

AI Technical Summary

Problems solved by technology

[0016] Current ocean energy power generation devices, such as wave power generation devices, usually place the impeller in seawater, and use the flowing seawater to drive the blades of the impeller to rotate to generate electricity, wherein the blades of the impeller runner will be inclined or It is installed perpendicular to the water surface and the direction of fluid flow. When the blades of this type of runner go deep into the seawater, because the blades are installed in a ring and move in a circumferential direction, when the fluid impacts the blades in a direction perpendicular to the blade axis, it rotates underwater. In the course of one cycle, the blade moves in the same direction as the fluid flow in the first half of the cycle, and the blade is affected by the thrust of the fluid, but the blade moves in the opposite direction to the fluid flow in the second half of the cycle. At this time, the blade will be resisted by the fluid. Effect, that is, in the first half of the rotation period of the blade, the fluid thrust is applied to the first half of the rotation, but the fluid resistance is applied to the second half of the rotation. Therefore, the working method of this type of impeller greatly loses the work done by the fluid to push the blade and reduces the power generation efficiency; when When blades such as turbine runner blades are arranged obliquely and completely buried in seawater, the blades will also be affected by fluid impact resistance. Since turbine blades are arranged in an oblique manner, the force on the water guide surface of the blades is the tangential distribution of the fluid impact force. force, resulting in the upper limit of the working efficiency of the runner, resulting in weak power generation capacity of the generator

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