Ballast water tank adjustment method for a back-bent pipe wave energy power generation device

By installing buoyancy tanks on the hull and dividing the ballast water compartments into small compartments, combined with sea condition monitoring and preset plans, the problem of unstable power generation efficiency of wave energy power generation devices under different sea conditions was solved, and efficient pitch motion resonance and attitude stability were achieved.

CN117404234BActive Publication Date: 2025-09-23DONGFANG ELECTRIC(FUJIAN)INNOVATION INST CO LTD
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Patent Information

Application Number
CN202311473382.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-11-07
Publication Date
2025-09-23
Estimated Expiration
2043-11-07

AI Technical Summary

Technical Problem

In the prior art, the pitch amplitude of a ship changes under different sea conditions, resulting in unstable power generation efficiency of the wave energy power generation device, requiring real-time adjustment of the ballast water tank to match the changes in sea conditions.

Method used

By setting up buoyancy tanks on the hull, it is divided into several small ballast water compartments, and the control system controls the electric pumps to pump or drain water, so that each small ballast water compartment is in a full or empty state. The ballast plan is preset according to the historical sea condition data, and the sea conditions are monitored in the sea area to match the corresponding ballast plan and adjust the ballast condition of the buoyancy tank.

Benefits of technology

The wave energy power generation device can maintain efficient power generation under different sea conditions. By adjusting the center of gravity and weight distribution, the natural period of the pitch motion is matched with the sea wave period, thereby improving the power generation efficiency and the attitude stability of the device.

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Abstract

The present invention relates to a ballast water tank adjustment method for a backward bent pipe wave energy power generation device. The method comprises the following steps: obtaining historical sea condition data of a working sea area, analyzing and obtaining n possible sea conditions in the sea area; presetting a corresponding ballast scheme for a buoyancy tank for each sea condition; monitoring the sea condition of the sea area at intervals of T after the wave energy power generation device is deployed in the working sea area; matching the monitored sea condition to one of the n preset sea conditions, and adjusting to the corresponding ballast scheme; and changing the state of each small ballast water tank so that the natural period of the adjusted pitching motion is the same as or relatively close to the wave period of the current sea condition. When the wave energy power generation device is acted upon by waves, a violent resonant motion will occur in the pitching direction, so that the pitching motion always maintains a large motion amplitude, and the wave energy power generation device maintains a high level of power generation efficiency.
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Citation Information

Patent Citations

  • Wave energy power generation equipment

    CN111550358A

  • Method for operating a buoyant body of a wave power plant and a wave power plant

    US20120285544A1