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公开(公告)号：US20200040865A1
公开(公告)日：2020-02-06
申请号：US16339570
申请日：2017-09-11
Applicant: Dalian University of Technology
Inventor： Wei SHI , Zhiyu JIANG , Zhengru REN , Dezhi NING
Abstract: The present invention relates generally to the offshore renewable energy utilization technology. A novel floating wind-wave integrated power generation system is based on the braceless semi-submersible floating wind turbine concept and the oscillating water column (OWC) wave energy generator. The integrated system includes the offshore wind energy system and the oscillation water column wave energy system. The novel floating wind-wave integrated power generation system transfers the rise and fall movement of the water column into the air in and out movement which is converted into the electricity by the air turbine generator. This invention makes good use of pontoons at of the semi-floating platform and the mooring lines. Since the wave energy system will move with the wave movement, which will reduce the power generation efficiency. The pontoon can help to mitigate this movement. The mooring system can further prevent the movement of the wave energy device. This invention uses the braceless structure, which simplifies the construction process and reduce the fatigue issues for the braces. Compared with the traditional three columns semi-submersible wind turbine, this invention enlarges the water plane area. The moment of inertia for hydrostatic stability is enhanced, and the stability of the floating foundation is improved.
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公开(公告)号：US20200340447A1
公开(公告)日：2020-10-29
申请号：US16762045
申请日：2018-08-22
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Zhiyu JIANG , Zhengru REN , Wei SHI , Dezhi NING
IPC: F03D7/02
Abstract: A method for aerodynamic braking based on the independent pitch for horizontal-axis wind turbines is disclosed. The pitch angle of each blade is increased by the pitch driver installed on each blade while a wind turbine adopts pitch-to-feather braking. In accordance with the change rate of the pitch angle of each blade, the pitch angle of each blade is adjusted, respectively. Strain sensors are installed at the root of each blade, sensors used for the blade pitch measurement are installed on the inner edge of the hubs, and the pitch actuators and controllers are installed in the nacelle of the wind turbine. The respective magnitude of the tensile force is measured by the strain sensors at the roots of the three blades, and the resultant change rate is calculated. At different time instants, the pitch angle is increased to its maximum 90 degrees by using the pitch actuator.
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公开(公告)号：US20200271183A1
公开(公告)日：2020-08-27
申请号：US16495022
申请日：2018-02-28
Applicant: Dalian University of Technology
Inventor： Zhiyu JIANG , Zhengru REN , Wei SHI , Dezhi NING
Abstract: An active tuned mass damper applied to the offshore monopile wind turbine belongs to the field of marine technology. A mass block is connected to the inner wall of the tower through a spring. The two ends of the damper and the force actuator are connected to the mass block and the inner wall of the tower, respectively. When the installation of tower is finished, the spring and the damper begin to work. The movement of mass block will partly offset the movement of the tower caused by the wave force. The force actuator starts to work before the mating. The exact position of the nacelle can be obtained from the Global Positioning System (DGPS). The position of tower can be adjusted in the horizontal plane through the force actuator. So, the offshore installation time for nacelle will be saved. The whole installation time and cost will also be reduced.
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4.发明公开公开(公告)号：US20230220825A1
公开(公告)日：2023-07-13
申请号：US17911344
申请日：2022-01-11
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Chongwei ZHANG , Xunhao ZHU , Jierao DAI , Dezhi NING
IPC: F03B13/20
CPC classification number: F03B13/20 , F05B2220/706 , F05B2270/18
Abstract: The present invention provides an independent wave energy power generation buoyancy tank based on a principle of liquid sloshing. A shape of the independent wave energy power generation buoyancy tank is an oblate spherical floating sphere, and crash pads are arranged along the middle direction and the circumferential direction of the buoyancy tank. A hatch cover is installed at the top of the independent wave energy power generation buoyancy tank, and a washer is arranged at the contact between the hatch cover and the floating sphere 9. A signal lamp is installed on the hatch cover. An anchoring ring and a cable socket are installed at a top side of the independent wave energy power generation buoyancy tank. Four sand injection and discharge valves are uniformly arranged on the upper part of the independent wave energy power generation buoyancy tank along the circumferential direction.
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公开(公告)号：US20230213014A1
公开(公告)日：2023-07-06
申请号：US17799577
申请日：2021-12-27
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Chongwei ZHANG , Jierao DAI , Dezhi NING
CPC classification number: F03B13/142 , F03B11/008
Abstract: The present invention belongs to the technical field of ocean energy utilization, and provides a test system for turbine comprehensive performance of a pneumatic wave energy converter. The test system for turbine comprehensive performance of the pneumatic wave energy converter comprises a wave surface simulation system, an airflow rectifier system, a turbine device, a tabletop support structure, an instrument support frame and a sensor analysis system. A programmable linear motor is used to drive a bellows to simulate the complex oscillating airflow of the pneumatic wave energy converter; a complete sensor and measurement system is configured for various performance indexes of a turbine system; and finally, an effective technical evaluation means for the power generation efficiency and comprehensive performance evaluation of the pneumatic wave energy converter is provided. The present invention has simple assembly and disassembly technologies and high flexibility.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20210190031A1
公开(公告)日：2021-06-24
申请号：US16980737
申请日：2019-10-11
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Chongwei ZHANG , Zhenyu DING , Dezhi NING
IPC: F03B13/16
Abstract: A wave-direction-adaptive wave focusing type wave energy convertor with multiple water channels, comprising an energy acquisition system, an energy conversion system and a support system. Wave focusing is carried out through double water channels, so that the movement amplitude of water particles behind a box is doubled. A device is connected with a fixed pile through universal bearings, so that an opening of the device is always faced to a wave flow direction, which adapts to different seasons and water conditions, has low environmental requirements, and can be used in a wide sea area. Several coils of pretension spring compression are arranged in a winding barrel, so that a nylon rope connected to a buoy is ensured to be always in a straightened state and not derail from pulley blocks to work abnormally due to looseness whether the buoy is at a wave crest or a wave trough.
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公开(公告)号：US20250010958A1
公开(公告)日：2025-01-09
申请号：US18279737
申请日：2022-12-05
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY , DONGHAI LABORATORY
Inventor： Chongwei ZHANG , Jindie WEI , Xunhao ZHU , Dezhi NING
Abstract: An air-liquid dual control anti-rolling control system for a floating offshore wind turbine in offshore deep sea comprises an equipment compartment and three closed TLCD loop units. The equipment compartment is arranged above box girders; and each TLCD loop unit mainly forms a closed loop by a liquid tank, an air tube and a liquid tube and is embedded into the structure of a floating foundation. The system of the present invention has simple structure, easy installation, detachability, easy replacement and convenient use. The system of the present invention has universality, the designed TLCD loop units are independent of each other, and the start and stop of each TCLD loop unit is entirely coordinated and scheduled by a control module, which is easy to expand. The system of the present invention can realize intelligent autonomous control. By analyzing the measured motion parameters of the floating offshore wind turbine foundation, the control module autonomously determines the TLCD loop unit to be started according to the swing direction of the floating offshore wind turbine foundation, and determines to start an air-control module or liquid-control module of the TLCD loop unit according to the swing frequency of the floating offshore wind turbine foundation, as well as the resistance value of a slide rheostat in an air-control module or the rotational speed of motors of water-turbine sets in a liquid-control module.
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8.发明申请公开(公告)号：US20200208611A1
公开(公告)日：2020-07-02
申请号：US16631330
申请日：2018-05-24
Applicant: Dalian University of Technology
Inventor： Wei SHI , Lin ZHOU , Zhengru REN , Jikun YOU , Dezhi NING , Ying GOU
Abstract: A deep sea energy integration system based on a floating wind turbine and a current energy device, being of a power generation structure having wind turbines with a Spar platform as a foundation and integrating vertical axis current energy device, and having a Spar-type floating wind power generation system and a current energy power generation system. The Spar-type floating wind power generation system is simple in structure and high in stability, is suitable for middle and far sea areas. By combining an offshore wind turbine with the current energy power generation device to share the Spar platform, an mooring line, a voltage transformation device, and a power transmission device, the power generation performance of the system is improved. An outer support of the current energy power generation system is a cylindrical shape, thereby reducing wave loads, utilizing the current energy to the maximum extent.
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公开(公告)号：US20200080536A1
公开(公告)日：2020-03-12
申请号：US16344329
申请日：2017-11-16
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Dezhi NING , Yu ZHOU , Chongwei ZHANG
IPC: F03B13/14
Abstract: The present invention provides an oscillating water column-oscillating buoy combined wave energy converter. The present invention combines the advantages of the wave energy converters of the oscillating water column and the oscillating buoy. The conversion principles of wave energy of the oscillating water column and the oscillating buoy are on the contrary. The oscillating water column works when the structure does not move, while the oscillating buoy works when the structure substantially vibrates. The oscillating water column and the oscillating buoy are respectively operated in respective spectral ranges without affecting each other, thereby expanding the effective frequency band width of wave energy conversion. Due to the characteristic of absorbing the wave energy at all directions of 360°, the absorption efficiency of the wave energy is enhanced. Through the adoption of a fixed structure, stability of the converter can be ensured, generating efficiency is enhanced and maintenance is facilitated.
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公开(公告)号：US20210190045A1
公开(公告)日：2021-06-24
申请号：US16980331
申请日：2019-10-11
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Chongwei ZHANG , Qianze ZHUANG , Dezhi NING
Abstract: A wave energy thermal storage type seawater thermoelectric power generation device which comprises a buoy-type energy capture system, a platform system and a mooring system. A whole friction liquid heating, thermal storage and power generation device is arranged inside a platform, which improves the adaptability of the whole system to the external environment. A flywheel and liquid friction heating method is adopted to generate heat more efficiently. Inner ratchets and pawls are used to control the movement of a flywheel so that the flywheel always rotates in one direction, and when the rotating speed of the flywheel exceeds that of the inner ratchets, the external wave energy cannot be transferred to the flywheel through the movement of the inner ratchets so as to limit the upper limit of the rotating speed of the flywheel and protect the safety of the flywheel system.
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