Closed ocean pumped storage device
By adopting a closed rigid and flexible reservoir structure in marine pumped storage batteries, combined with the ventilation hose to maintain a constant atmospheric pressure, the corrosion and energy loss problems caused by seawater media are solved, and the equipment life and energy utilization efficiency are improved.
Patent Information
- Application Number
- CN202420115055.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-17
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-01-17
AI Technical Summary
The existing seawater pumped storage battery reservoir uses seawater as the working medium, resulting in corrosion, marine organism adhesion and biological dirt problems. The air pressure and volume of the reservoir change drastically during the water filling and pumping process, resulting in energy loss.
The closed rigid reservoir and flexible reservoir structure are adopted to transmit external hydrostatic pressure through the flexible reservoir to protect internal components; a ventilation hose is installed to connect the rigid reservoir and the water surface float to maintain a constant atmospheric pressure and reduce energy loss.
Effectively prevent corrosion, marine organisms and biological dirt, improve equipment life, and reduce energy loss in the reservoir during water filling and pumping.
Smart Images
Figure 00000000_0000_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of seawater pumping storage, in particular to a closed system marine pumping storage device. Background Art
[0002] Closed ocean pumped storage devices, commonly known as ocean batteries, are located on the seabed, close to offshore wind, wave or floating solar power plants. They are directly connected to the power plants by cables, effectively storing electricity that is not easily absorbed by the power grid, and releasing it when the grid needs it, thereby realizing the energy storage function of green energy. This effectively solves the intermittent problem of offshore wind and solar power generation, and can participate in regional power grid frequency regulation, peak regulation, power grid demand response and other functions to smooth the output of wind or photovoltaic power generation.
[0003] The seawater pumped storage battery reservoirs currently being studied in the industry use seawater as the direct medium for filling and pumping. Technically, it is possible to use seawater itself as the working medium for an open system, but corrosion, marine biofouling and biofouling will affect the internal components of the storage battery reservoir, which is highly undesirable. At the same time, the air pressure and volume in the reservoir change dramatically during the filling and pumping process, which will result in a large amount of energy loss from a thermodynamic point of view.
[0004] Therefore, there is a need for a closed marine pumped storage device with a closed liquid storage system to increase equipment life and reduce energy loss. Utility Model Content
[0005] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a closed marine pumped storage device with a closed liquid storage system to avoid corrosion, biological adhesion and fouling caused by an open structure that affects the life of the equipment, while avoiding a large amount of energy loss in the liquid storage device during the filling and pumping process.
[0006] The purpose of the utility model is achieved in this way:
[0007] A closed marine pumped storage device is arranged on the seabed, comprising a working chamber, rigid reservoirs symmetrically arranged on both sides of the working chamber, a flexible reservoir arranged between the working chamber and the rigid reservoir, a pipeline arranged in the working chamber for connecting the rigid reservoir and the flexible reservoir, and a working medium flowing between the rigid reservoir and the flexible reservoir through the pipeline; a ventilation hose connected to the atmosphere is provided on the top of the rigid reservoir; a flexible shell whose edge is sealed with the flexible reservoir cavity is provided on the top of the flexible reservoir; a turbine generator and a water pump arranged in the working chamber are connected to the pipeline, which is connected to the power grid through an umbilical cable.
[0008] Furthermore, the working chamber and the rigid liquid reservoir are fixed on the seabed via a suction bucket.
[0009] Furthermore, the top of the ventilation hose is connected to a buoy floating on the sea surface.
[0010] Furthermore, the flexible shell comprises a composite layer of a rubber layer and a fiber layer.
[0011] Furthermore, the working medium is fresh water that has been sterilized and disinfected.
[0012] Furthermore, the umbilical cable includes a power cable and a control cable.
[0013] Compared with the prior art, the beneficial effects of the utility model are:
[0014] The utility model adopts a closed rigid liquid reservoir and a flexible liquid reservoir structure, and transmits the external hydrostatic pressure to the internal working medium through the flexible liquid reservoir, which plays the role of a protective barrier, effectively preventing corrosion, marine organism attachment and biological fouling from affecting the internal components, and improving the life of the equipment; by arranging a ventilation hose to connect the rigid liquid reservoir and the water surface buoy, it is ensured that a constant atmospheric pressure is maintained in the rigid liquid reservoir during operation, thereby reducing energy loss. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 The utility model is a schematic diagram of the pumped storage process of a closed marine pumped storage device.
[0016] Figure 2 The utility model is a schematic diagram of the water filling and discharging process of a closed marine pumped storage device.
[0017] in:
[0018] Working chamber 1, rigid liquid reservoir 2, flexible liquid reservoir 3, pipeline 4, working medium 5, ventilation hose 6, flexible shell 7, umbilical cable 8, suction bucket 9, seabed 10, buoy 11. DETAILED DESCRIPTION
[0019] See also Figure 1~Figure 2The utility model relates to a closed marine pumped storage device, which is fixed on the seabed 10 through a suction barrel 9, and comprises a working chamber 1, a rigid liquid reservoir 2 symmetrically arranged on both sides of the working chamber 1, a flexible liquid reservoir 3 arranged between the working chamber 1 and the rigid liquid reservoir 2, a pipeline 4 arranged in the working chamber 1 for connecting the rigid liquid reservoir 2 and the flexible liquid reservoir 3, and a working medium 5 flowing between the rigid liquid reservoir 2 and the flexible liquid reservoir 3 through the pipeline 4; the working medium 5 is fresh water after sterilization and disinfection, and a closed liquid reservoir of the rigid liquid reservoir 2 and the flexible liquid reservoir 3 is used to reduce the corrosion damage of the working medium 5 to the marine battery equipment and improve the life of the equipment; the working chamber 1 and the rigid liquid reservoir 2 of the marine battery are fixed on the seabed 10 through the suction barrel 9, and the marine battery can be arranged at a suitable seabed position flexibly according to the specific location of the offshore wind farm and photovoltaic power plant, and the transfer and installation site of the marine battery is convenient;
[0020] A ventilation hose 6 connected to the atmosphere is provided on the top of the rigid liquid reservoir 2, and a buoy 11 floating on the sea surface is connected to the top of the ventilation hose 6; during the filling or pumping process of the rigid liquid reservoir 2, it is ensured that the air inside the rigid liquid reservoir 2 is always connected to the atmosphere to maintain a constant atmospheric pressure, so as to avoid a significant change in volume of the air in the rigid liquid reservoir 2 during filling or pumping, thereby preventing energy loss;
[0021] The flexible liquid reservoir 3 is provided with a flexible shell 7 whose edge is sealed with the cavity of the flexible liquid reservoir 3, and comprises a composite layer of a rubber layer and a fiber layer; the volume of the flexible liquid reservoir 3 is changed by the expansion and contraction of the flexible shell 7, so as to realize the filling and pumping operations of the flexible liquid reservoir 3;
[0022] The pipeline 4 is connected to a turbine generator and a water pump arranged in the working chamber 1, and is connected to the power grid and the wind farm or photovoltaic power plant through an umbilical cable 8; the umbilical cable 8 includes a power cable for transmitting power and a control cable for controlling the operation of the equipment;
[0023] When the battery is storing electricity, the rigid reservoir 2 draws water, and the working medium is pumped from the rigid reservoir 2 into the flexible reservoir 3 through a water pump. The flexible shell 7 expands against the seawater pressure, converting the power input from renewable energy sources (wind turbines, floating solar energy, wave energy converters, etc.) into the potential energy of the working medium 5 in the flexible reservoir 3. The working medium 5 is pressurized by the seawater around the flexible reservoir 3, generating a pressure difference between the flexible reservoir 3 (under the seawater hydrostatic pressure) and the rigid reservoir 2 (under atmospheric pressure), which is linearly related to the deployment depth of the marine battery. The seawater hydrostatic pressure outside the flexible reservoir 3 has long-term stability, which can achieve constant and long-term underwater energy storage.
[0024] When the battery is discharged, that is, the rigid reservoir 2 is filled with water, the ball valve of the pipeline 4 is opened. Due to the pressure difference between the rigid reservoir 2 and the flexible reservoir 3, the working medium 5 can flow from the flexible reservoir 3 through the turbine to the rigid reservoir 2. The turbine generates electricity and supplies power to the grid as needed.
[0025] In addition: It should be noted that the above specific implementation is only an optimization scheme of this patent. Any changes or improvements made by technicians in this field based on the above concept are within the scope of protection of this patent.
Claims
1. A closed marine pumped storage device, arranged on a seabed (10), characterized in that: The invention comprises a working chamber (1), rigid liquid reservoirs (2) symmetrically arranged on both sides of the working chamber (1), a flexible liquid reservoir (3) arranged between the working chamber (1) and the rigid liquid reservoir (2), a pipeline (4) arranged in the working chamber (1) for connecting the rigid liquid reservoir (2) and the flexible liquid reservoir (3), and a working medium (5) flowing between the rigid liquid reservoir (2) and the flexible liquid reservoir (3) through the pipeline (4); a ventilating hose (6) connected to the atmosphere is arranged on the top of the rigid liquid reservoir (2); a flexible shell (7) whose edge is sealed with the cavity of the flexible liquid reservoir (3) is arranged on the top of the flexible liquid reservoir (3); a turbine generator and a water pump arranged in the working chamber (1) are connected to the pipeline (4), which is connected to a power grid via an umbilical cable (8).
2. The closed marine pumped storage device according to claim 1, characterized in that: The working chamber (1) and the rigid liquid storage container (2) are fixed on the seabed (10) via a suction bucket (9).
3. The closed marine pumped storage device according to claim 1, characterized in that: The top of the ventilation hose (6) is connected to a buoy (11) floating on the sea surface.
4. The closed marine pumped storage device according to claim 1, characterized in that: The flexible shell (7) comprises a composite layer of a rubber layer and a fiber layer.
5. The closed marine pumped storage device according to claim 1, characterized in that: The working medium (5) is fresh water that has been sterilized and disinfected.
6. The closed marine pumped storage device according to claim 1, characterized in that: The umbilical cable (8) comprises a power cable and a control cable.