WO2024046496A1 - 一种刀片型零质量惯性高效发电波浪能装置 - Google Patents

一种刀片型零质量惯性高效发电波浪能装置 Download PDF

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WO2024046496A1
WO2024046496A1 PCT/CN2023/122689 CN2023122689W WO2024046496A1 WO 2024046496 A1 WO2024046496 A1 WO 2024046496A1 CN 2023122689 W CN2023122689 W CN 2023122689W WO 2024046496 A1 WO2024046496 A1 WO 2024046496A1
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floating body
wave
blade
wave absorption
power generation
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PCT/CN2023/122689
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English (en)
French (fr)
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王文胜
叶寅
乐婉贞
王坤林
盛松伟
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中国科学院广州能源研究所
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Publication of WO2024046496A1 publication Critical patent/WO2024046496A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
    • F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
    • F03B13/14—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy
    • F03B13/16—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem"
    • F03B13/20—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" wherein both members, i.e. wom and rem are movable relative to the sea bed or shore
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
    • F03B11/02—Casings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient

Definitions

  • the invention relates to the field of wave energy power generation, and in particular to a blade-type zero-mass inertia high-efficiency power generation wave energy device.
  • Ocean wave energy is an inexhaustible, abundant and renewable energy source, but at the same time, wave energy is unevenly distributed and has large regional differences. According to statistics, the total power of wave energy in the world is about 2.2 ⁇ 10 9 -2.7 ⁇ 10 9 kilowatts. The theoretical total power of wave energy in China is about 0.07 ⁇ 10 9 kilowatts, accounting for only 2.6% of the total wave energy power in the world.
  • my country's wave energy resources are not very rich, with small periods and small wave heights. Therefore, it is particularly important to design wave energy devices that adapt to my country's wave characteristics for wave energy devices placed in my country's sea areas.
  • the duck-type and eagle-type wave energy devices (CN102661231A, CN111058989A) of the Guangzhou Institute of Energy, Chinese Academy of Sciences have higher capture characteristics, but as shown in Figure 1 and Figure 2 As shown in the figure, the wave-absorbing floating body is huge in size, has large inertial mass, has poor response to small amplitude and small period waves, and consumes a large amount of wave excitation force as the waves move, and the effective power of the captured energy conversion is small.
  • the wave-absorbing buoyant body of traditional wave energy devices has a large inertia, which results in a slow response to wave height and small period waves and a low capture efficiency.
  • the wave-absorbing buoyant body needs to consume more wave excitation force to do work during movement, resulting in a loss of wave energy.
  • the present invention intends to design a blade-type "zero mass inertia" high-efficiency wave energy power generation equipment to improve the response sensitivity of the wave energy device to small wave motion and improve the capture efficiency of the wave energy device.
  • a blade-type zero-mass inertia high-efficiency power generation wave energy device including:
  • a wave-absorbing floating body which includes an underwater thin-walled arc portion of the wave-absorbing floating body and an above-water flat plate portion of the wave-absorbing floating body; the underwater thin-walled arc portion of the wave-absorbing floating body is in the shape of a blade;
  • the support truss has one end connected and installed in the underwater thin-walled arc part of the wave-absorbing floating body, and the other end is hinged with the support base.
  • the hinged point is the hinged rotation support point, and the rotating support point is the underwater thin-walled arc part of the wave-absorbing floating body. The center position of the arc.
  • the blade-type zero-mass inertia high-efficiency power generation wave energy device according to claim 1, further comprising:
  • An underwater buoyancy adjustment ball is installed at the bottom of the underwater thin-walled arc portion of the wave-absorbing floating body.
  • the power generation equipment is a PTO energy conversion system.
  • the PTO energy conversion system includes a hydraulic cylinder, which is driven by the upper surface of the wave-absorbing floating body.
  • the support truss is provided with more than two
  • the invention provides a blade-type "zero mass inertia" high-efficiency power generation wave energy device that can reduce the material usage of the wave-absorbing floating body, reduce the motion inertia, has small hydrodynamic added mass, does not radiate waves, and responds to small wave conditions and sea conditions more efficiently. It is sensitive and has higher wave-to-electricity conversion efficiency, making the wave energy device more economical and lower in cost.
  • Figure 1 is a photo of the existing wave-absorbing floating body of the duck wave energy device
  • Figure 2 is a photo of the existing wave-absorbing floating body of the Eagle wave energy device
  • Figure 3 is a schematic structural diagram of a blade-type zero-mass inertia high-efficiency power generation wave energy device provided by an embodiment of the present invention
  • connection should be understood in a broad sense.
  • it can be a fixed connection, a detachable connection, or an integral connection.
  • Ground connection can be a mechanical connection; it can be a direct connection or an indirect connection through an intermediary. It can be said to be the internal connection of two components.
  • this embodiment provides a blade-type zero-mass inertia high-efficiency power generation wave energy device that mainly includes a wave-absorbing floating body 1, a support truss 2, a support base 3 and power generation equipment.
  • the power generation equipment uses a PTO energy conversion system 4, which mainly includes hydraulic cylinders.
  • the wave-absorbing floating body 1 includes an underwater thin-walled arc portion 12 of the wave-absorbing floating body and an above-water flat plate portion 11 of the wave-absorbing floating body; the entire underwater thin-walled arc portion 12 of the wave-absorbing floating body is in the shape of a blade, which is a high-efficiency energy capture component of the wave energy device.
  • the above-water flat plate part 11 of the wave-absorbing floating body is used to drive the PTO energy conversion system 4 to work; one end of the support truss 2 is connected and installed in the underwater thin-walled arc part 12 of the wave-absorbing floating body, and the other end is hinged with the support base 3 at the hinged point is the hinged rotation support point 31, where the rotation support point 31 is the center position of the underwater thin-walled arc portion 12 of the wave-absorbing floating body.
  • This embodiment provides a blade-type "zero mass inertia" high-efficiency power generation wave energy device.
  • the wave-absorbing buoy quickly responds to movement, responds to small wave conditions and sea conditions, and moves more sensitively.
  • the blade-type wave-absorbing buoy accepts When the incident wave excites, a pitching motion occurs, driving the hydraulic cylinder to do work.
  • the wave-absorbing floating body begins to rotate around the hinged rotation support point. Due to the arc shape behind it, pitching does not create waves and does not produce radiation damping to dissipate energy;
  • the blade-type wave-absorbing floating body is light in weight, it requires less energy to rotate. Most of the work of the wave-absorbing floating body is absorbed by the PTO energy conversion system. Systematic acquisition improves the efficiency of energy capture by wave energy devices.
  • the device also includes an underwater buoyancy adjustment ball 5, which is installed at the bottom of the underwater thin-walled arc portion 12 of the wave-absorbing float.
  • the underwater buoyancy The regulating ball 5 provides a buoyancy-adjusted floating state, and because it is located at a relatively deep water depth, its impact on free liquid surface waves can be reduced.
  • the above-mentioned support trusses 2 are provided with two or more to ensure the stability of the blade-type wave-absorbing floating body 1 when rotating.

Abstract

一种刀片型零质量惯性高效发电波浪能装置，包括吸波浮体（1），其包括吸波浮体水下薄壁圆弧部（12）以及吸波浮体水上平板部（11）；支撑桁架（2），其一端连接安装在所述吸波浮体水下薄壁圆弧部（12）中，另一端和支撑座（3）相铰接，所述支撑座（3）的安装位置处于吸波体水下圆弧部（12）的圆心。在波浪入射波作用下，刀片型吸波浮体接受入射波激励，发生纵摇运动，驱动液压缸做功，同时吸波浮体开始绕着铰接旋转支撑点旋转运动，由于其背后的圆弧造型，纵摇不造波，不产生辐射阻尼耗散能量；其次，由于刀片型吸波浮体质量轻，因此其转动时需要的能量较少，波浪作用浮体的绝大部功均被PTO能量转换系统获取，提高了波浪能装置俘获能量的效率。

Description

一种刀片型零质量惯性高效发电波浪能装置 技术领域：
本发明涉及波浪能发电领域，具体涉及一种刀片型零质量惯性高效发电波浪能装置。
背景技术：
海洋波浪能是一种取之不尽、用之不竭、蕴藏丰富的可再生能源，但同时波浪能分布不均匀、地域区别大。据统计世界波浪能总功率约为2.2×109-2.7×109千瓦，我国的波浪能理论总功率约为0.07×109千瓦，仅占世界波浪能总功率的2.6％。我国的波浪能资源并不算十分丰富，周期小，波高小，因此对投放于我国海域的波浪能装置，设计适应我国波浪特点的波浪能装置就显得尤为重要。
基于波浪能的能源高品质特性和具有的开发优势，近年来中国科学院广州能源研究所的鸭式、鹰式波浪能装置(CN102661231A、CN111058989A)具有较高的俘获特性，但是如图1和图2所示，其吸波浮体体型巨大，惯性质量大，对于小波幅小周期波响应较差，且随着波浪运动时消耗大量的波浪激励力做功能量，俘获能量转换有效功较小。
发明内容：
基于传统波浪能装置吸波浮体具有较大的惯性导致其针对小波高小周期波浪响应较慢，俘获效率较低缺陷；以及吸波浮体在运动中需要消耗更多波浪激励力做功，致使波浪能装置俘获效率低的缺陷，本发明拟设计一种刀片型“零质量惯性”高效波浪能发电设备，提高波浪能装置小波浪运动响应灵敏度和提高波浪能装置俘获效率。
为实现上述目的，本发明的技术方案是：
一种刀片型零质量惯性高效发电波浪能装置，包括：
吸波浮体，其包括吸波浮体水下薄壁圆弧部以及吸波浮体水上平板部；所述吸波浮体水下薄壁圆弧部成刀片型；
支撑桁架，其一端连接安装在所述吸波浮体水下薄壁圆弧部中，另一端和支撑座相铰接，相铰接的点为铰接旋转支撑点，所述旋转支撑点为吸波浮体水下薄壁圆弧部的圆心位置。
如权利要求1所述的刀片型零质量惯性高效发电波浪能装置，其特征在于，还包括：
水下浮力调节球，其安装在所述吸波浮体水下薄壁圆弧部的底部。
进一步地，所述发电设备为PTO能量转换系统。
进一步地，所述PTO能量转换系统包括液压缸，所述液压缸由吸波浮体水上平板部驱动做工。
进一步地，所述支撑桁架设置有两根以上
本发明与现有技术相比，其有益效果在于：
本发明提供的一种刀片型“零质量惯性”高效发电波浪能装置，可以降低吸波浮体的材料使用，降低运动惯性，水动力学附加质量小，不辐射造波，响应小波况海况运动更加灵敏，波电转换效率更高，波浪能装置经济性高造价更低。
附图说明
图1为现有的鸭式波浪能装置吸波浮体实物照片图；
图2为现有的鹰式波浪能装置吸波浮体实物照片图；
图3为本发明实施例提供的刀片型零质量惯性高效发电波浪能装置的结构示意图；
图中：1、吸波浮体；2、支撑桁架；3、支撑座；4、PTO能量转换系统；5、水下浮力调节球；11、吸波浮体水上平板部；12、吸波浮体水下薄壁圆弧部；31、铰接旋转支撑点。
具体实施方式：
实施例：
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接；可以是直接相连，也可以是通过中间媒介间接连接，可以说两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明的具体含义。下面结合附图和实施例对本发明的技术方案做进一步的说明。
参阅图3所示，本实施例提供的一种刀片型零质量惯性高效发电波浪能装置主要包括吸波浮体1、支撑桁架2、支撑座3以及发电设备。在本实施例中，发电设备采用PTO能量转换系统4，主要包括液压缸。
其中，该吸波浮体1包含吸波浮体水下薄壁圆弧部12和吸波浮体水上平板部11；吸波浮体水下薄壁圆弧部12整体成刀片型状，为波浪能装置的高效俘能部件；吸波浮体水上平板部11用于驱动PTO能量转换系统4做工；支撑桁架2的一端连接安装在吸波浮体水下薄壁圆弧部12中，另一端和支撑座3相铰接，相铰接的点为铰接旋转支撑点31，其中旋转支撑点31为吸波浮体水下薄壁圆弧部12的圆心位置。
本实施例所提供的一种刀片型“零质量惯性”高效发电波浪能装置，在波浪入射波作用下，吸波浮体迅速响应运动，响应小波况海况更加运动更加灵敏，刀片型吸波浮体接受入射波激励，发生纵摇运动，驱动液压缸做功，同时吸波浮体开始绕着铰接旋转支撑点旋转运动，由于其背后的圆弧造型，纵摇不造波，不产生辐射阻尼耗散能量；其次，由于刀片型吸波浮体质量轻，因此其转动时需要的能量较少，波浪作用浮体的绝大部分功均被PTO能量转换系 统获取，提高了波浪能装置俘获能量的效率。
作为实施例所提供的刀片型零质量惯性高效发电波浪能装置的一种优选，该装置还包括水下浮力调节球5，其安装在吸波浮体水下薄壁圆弧部12的底部，水下浮力调节球5提供浮力调节浮态，并且由于其在水深较深处，可以减少其对自由液面波浪的影响。
在一具体实施例中，上述的支撑桁架2设置有两根或以上，以保证刀片型吸波浮体1转动时的平稳性。
上述实施例只是为了说明本发明的技术构思及特点，其目的是在于让本领域内的普通技术人员能够了解本发明的内容并据以实施，并不能以此限制本发明的保护范围。凡是根据本发明内容的实质所做出的等效的变化或修饰，都应涵盖在本发明的保护范围内。

Claims (5)

  1. 一种刀片型零质量惯性高效发电波浪能装置，其特征在于，包括：
    吸波浮体，其包括吸波浮体水下薄壁圆弧部以及吸波浮体水上平板部；所述吸波浮体水下薄壁圆弧部成刀片型；
    支撑桁架，其一端连接安装在所述吸波浮体水下薄壁圆弧部中，另一端和支撑座相铰接，相铰接的点为铰接旋转支撑点，所述旋转支撑点为吸波浮体水下薄壁圆弧部的圆心位置。
  2. 如权利要求1所述的刀片型零质量惯性高效发电波浪能装置，其特征在于，还包括：
    水下浮力调节球，其安装在所述吸波浮体水下薄壁圆弧部的底部。
  3. 如权利要求1或2所述的刀片型零质量惯性高效发电波浪能装置，其特征在于，所述发电设备为PTO能量转换系统。
  4. 如权利要求3所述的刀片型零质量惯性高效发电波浪能装置，其特征在于，所述PTO能量转换系统包括液压缸，所述液压缸由吸波浮体驱动做工。
  5. 如权利要求1所述的刀片型零质量惯性高效发电波浪能装置，其特征在于，所述支撑桁架设置有两根以上。
PCT/CN2023/122689 2022-10-12 2023-09-28 一种刀片型零质量惯性高效发电波浪能装置 WO2024046496A1 (zh)

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