A solar light and heat energy storage system based on optical fiber transmission technology

Abstract

This invention discloses a solar thermal energy storage system based on fiber optic transmission technology. The key technical features include a sunlight collection device for highly amplified and compressed solar energy; a fiber optic transmission device for transmitting the highly amplified and compressed sunlight; and a solar thermal energy storage tank for receiving the highly amplified and compressed sunlight transmitted by the fiber optic transmission device and converting the light energy into heat energy stored in a heat storage medium within the tank. The solar thermal energy storage tank is designed to be portable. By highly amplifying and compressing sunlight through the sunlight collection device and reducing light energy loss through the fiber optic transmission system, the portable nature of the solar thermal energy storage tank is achieved. This portability enhances the deployment flexibility of the solar thermal energy storage tank and expands the application scenarios of the energy storage system.

Description

Technical Field

[0001] This invention relates to the technical field of solar thermal energy storage, and more specifically, to a solar thermal energy storage system based on optical fiber transmission technology. Background Technology

[0002] Existing solar thermal energy storage power generation systems mainly consist of a solar collector, a solar tower, an energy storage tank, a heat exchanger, and a steam turbine generator.

[0003] The sunlight collector consists of thousands of heliostats (referred to as "heliostat field"), forming a huge mirror field. Under the control of the solar tracking system, it precisely tracks the sun and reflects and concentrates sunlight onto the solar collector tower.

[0004] The solar collector tower is a cylindrical structure. At its top is a heat absorber made of a high-performance alloy that is heat-resistant, corrosion-resistant, and coated with a high-absorption-rate heat-absorbing coating. The absorber's diameter ranges from tens to hundreds of meters, its height from tens to hundreds of meters, and its weight from hundreds to tens of thousands of tons. It is used to receive solar energy gathered by the mirror field. The cylindrical heat absorber contains a heat storage medium or working fluid, which can be a low-temperature molten salt, a high-temperature molten salt, or other types of heat storage medium. This medium converts the received solar energy into heat energy and stores it within it. After storing heat energy, the heat storage medium changes from a solid to a liquid state, and then rises from a low-temperature liquid state to a high-temperature liquid state, resulting in a significant increase in the stored heat energy.

[0005] The energy storage tank is divided into a high-temperature energy storage tank and a low-temperature energy storage tank. It is connected to the heat receiver of the solar collector tower at the top and to the heat exchanger at the bottom. The high-temperature liquid energy storage medium in the solar collector tower flows into the high-temperature energy storage tank. After the heat is transferred out through the heat exchanger, it becomes a low-temperature energy storage medium and flows back to the low-temperature energy storage tank, and finally returns to the heat receiver of the solar collector tower.

[0006] The heat exchanger delivers heat energy from the high-temperature energy storage tank to the steam turbine generator, which then converts the heat energy into electrical energy that can be transmitted.

[0007] Traditional solar thermal systems are limited by fixed heat collection structures, resulting in huge size and weight, low efficiency in heat storage and transmission, and difficulty in dynamically distributing energy. In existing technologies, concentrated solar systems usually rely on large parabolic reflectors or heliostat arrays, which require heat energy to be transferred to the heat storage device through pipes or complex mechanical mechanisms, resulting in large energy losses, poor deployment flexibility, and limited application scenarios. Summary of the Invention

[0008] To address the shortcomings of existing technologies, the present invention aims to provide a solar thermal energy storage system based on fiber optic transmission technology. This system uses a sunlight collection device to concentrate and compress sunlight at a high multiple, and uses a fiber optic transmission system to reduce the loss of light energy, thereby achieving the mobility of the solar thermal energy storage tank. This mobility improves the deployment flexibility of the solar thermal energy storage tank and expands the application scenarios of the energy storage system.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a solar thermal energy storage system based on optical fiber transmission technology, including a sunlight collection device, which is used to concentrate and compress the solar energy emitted by the sun at a high multiple.

[0010] An optical fiber transmission device for transmitting sunlight that has been highly focused and compressed.

[0011] And a solar thermal energy storage tank, which is used to receive high-multiplier concentrated and compressed sunlight transmitted by an optical fiber transmission device, and convert the light energy into heat energy and store it in the heat storage medium inside the tank. The solar thermal energy storage tank is configured as a portable solar thermal energy storage tank.

[0012] The present invention is further configured such that the sunlight collection device comprises at least one sunlight collector;

[0013] The sunlight collector includes a sunlight collection module, a solar sensor, and a dual-axis motor power mechanism.

[0014] The present invention is further configured such that: the sunlight collection module includes an optical lens array, the optical lens array being used to focus and compress sunlight at a high magnification;

[0015] And an optical fiber adapter, which is used to connect to the front end of the optical fiber transmission device, i.e., the receiving end, and to position the receiving end of the optical fiber transmission device.

[0016] The present invention is further configured such that the distance between the fiber optic adapter and the optical lens array is adjustable.

[0017] The present invention is further configured such that the optical fiber transmission device is a single optical fiber, or an optical fiber bundle formed by bundling multiple optical fibers together.

[0018] The present invention is further configured such that: the receiving end of the optical fiber transmission device is connected to the sunlight collection device, and the receiving end is located at the focal point of the optical axis of the optical lens;

[0019] The transmitting end of the optical fiber transmission device is configured as a single optical fiber, or an optical fiber bundle composed of multiple optical fibers.

[0020] The present invention is further configured such that: the optical fiber transmission device further includes a sunlight projector connected to the transmitting end of the optical fiber transmission device, the sunlight projector being used to position the optical fiber at the end of the optical fiber transmission device.

[0021] The present invention is further configured such that: the optical fiber transmission device is composed of multiple optical fibers, which are configured to be directly connected end-to-end, or can be configured to be connected by an end-to-end optical fiber bundle, wherein the optical fiber bundle is configured to combine multiple optical fibers into one optical fiber.

[0022] The invention is further configured such that: the sunlight projector includes an optical fiber connector for connecting to an optical fiber at the end of an optical fiber transmission device.

[0023] The present invention is further configured such that: the sunlight projector also includes a zoom optical lens, the zoom optical lens is used to shape the light field of the highly focused light transmitted from the optical fiber transmission device to obtain the light field distribution required by the photothermal energy storage tank, and the light field distribution is set to the shape and size of the light spot.

[0024] The present invention is further configured such that the zoom optical lens is a single zoom lens or a combination of multiple lenses.

[0025] The present invention is further configured such that: the solar projector is disposed outside the solar thermal energy storage tank and connected to the solar thermal energy storage tank, and the solar thermal energy storage tank is provided with one or more solar projectors.

[0026] The present invention is further configured such that the optical fiber transmission device is provided with one or more sunlight projectors.

[0027] The present invention is further configured such that: the solar thermal energy storage tank is provided with a standardized interface for quick connection with a sunlight projector, the standardized interface being configured as a magnetic interface or a snap-fit ​​interface.

[0028] The present invention is further configured such that: the solar thermal energy storage tank is configured as a multi-layer composite structure, the inner layer is configured as a heat-absorbing coating, the middle layer is configured as a phase change energy storage medium, and the outer layer is configured as a vacuum insulation layer.

[0029] The present invention is further configured such that the outer layer of the solar thermal energy storage tank is configured as a single-layer vacuum insulation or a multi-layer vacuum insulation.

[0030] The present invention is further configured such that the energy storage medium material in the intermediate layer of the solar thermal energy storage tank is molten salt, metal phase change material or ceramic composite material.

[0031] The present invention is further configured such that the solar thermal energy storage tank is provided with a roller or slide rail structure to facilitate the movement of the solar thermal energy storage tank.

[0032] The present invention is further configured such that: a single layer or multiple layers of quartz glass are provided at the standardized interface of the solar thermal energy storage tank, and a vacuum is provided between two adjacent layers of quartz glass in the multiple layers of quartz glass.

[0033] The present invention is further configured such that: a heat exchanger is provided on the solar thermal energy storage tank, the heat exchanger being used to convert the heat stored in the solar thermal energy storage tank into other forms of energy and release them to the outside.

[0034] The present invention is further configured such that the photothermal energy storage tank is configured as a microchannel continuous flow cavity.

[0035] The present invention is further configured such that a high-reflectivity optical thin film is coated on the inner wall of the photothermal energy storage tank.

[0036] The present invention is further configured such that the length of the optical fiber transmission device is set according to the position of the photothermal energy storage tank.

[0037] The present invention is further configured such that the correspondence between the sunlight collection device and the solar thermal energy storage tank is set as follows:

[0038] Multiple solar energy collection devices correspond to one solar thermal energy storage tank, or

[0039] One solar energy collection device corresponds to one solar thermal energy storage tank, or

[0040] One solar energy collection device corresponds to multiple solar thermal energy storage tanks, or

[0041] Multiple solar energy collection devices correspond to multiple solar thermal energy storage tanks.

[0042] The present invention is further configured to include an intelligent control system, which is used to allocate the correspondence between the sunlight collection device and the solar thermal energy storage tank.

[0043] In summary, the present invention has the following advantages compared with the prior art: the present invention concentrates and compresses sunlight at a high multiple through a sunlight collection device, reduces the loss of light energy through an optical fiber transmission system, and improves the deployment flexibility and expands the application scenarios of the energy storage system through a portable solar thermal energy storage tank. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the overall structure of the embodiment;

[0045] Figure 2 This is a schematic diagram illustrating the correspondence between the sunlight collection device and the solar thermal energy storage tank in an embodiment.

[0046] Figure 3 This is a schematic diagram illustrating an intelligent control system as an example.

[0047] Figure 4 This is a schematic diagram illustrating a specific implementation method of a solar thermal energy storage system;

[0048] Figure 5 A schematic diagram of an implementation method for simultaneously supplementing light and heat to dual solar thermal energy storage tanks.

[0049] In the diagram: 1. Sunlight collection device; 2. Fiber optic transmission device; 3. Photothermal energy storage tank; 31. Standardized interface; 32. Heat exchanger. Detailed Implementation

[0050] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments in this application, other similar embodiments obtained by those skilled in the art without creative effort should all fall within the scope of protection of this application. Furthermore, directional terms mentioned in the following embodiments, such as "up," "down," "left," and "right," are only for reference to the directions in the accompanying drawings; therefore, the directional terms used are for illustrative purposes and not for limiting the invention.

[0051] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0052] Example: A solar thermal energy storage system based on fiber optic transmission technology, see appendix. Figure 1 -Appendix Figure 5 The system includes a sunlight collection device 1, an optical fiber transmission device 2, and a solar thermal energy storage tank 3. The sunlight collection device 1 is used to concentrate and compress the sunlight emitted by the sun at a high multiple. The optical fiber transmission device 2 is used to transmit the sunlight after it has been concentrated and compressed at a high multiple. The solar thermal energy storage tank 3 is used to receive the sunlight transmitted by the optical fiber transmission device 2 at a high multiple multiple and convert the light energy into heat energy and store it in the heat storage medium inside the tank. The solar thermal energy storage tank 3 is configured as a portable solar thermal energy storage tank 3.

[0053] The sunlight collection device 1 concentrates and compresses sunlight to form a high-concentration light source, and the optical fiber transmission device 2 transmits the high-concentration light to the solar thermal energy storage tank 3, where energy is stored through the heat storage medium.

[0054] Specifically, the sunlight collection device 1 consists of at least one sunlight collector; the sunlight collector includes a sunlight collection module, a solar sensor, and a dual-axis motor power mechanism.

[0055] A dual-axis motor power mechanism and a solar sensor constitute a solar tracking module, enabling precise tracking of the sun's trajectory and allowing the sunlight collection module to continuously collect sunlight. The sunlight collector is used to concentrate and compress sunlight at a high factor, with compression ratios set to 100 times, 1000 times, or even more than 10000 times. Correspondingly, the power density (light intensity) of the concentrated and compressed sunlight will increase by 100 times, 1000 times, or even more than 10000 times.

[0056] Specifically, the sunlight collection module includes an optical lens array and a fiber optic adapter. The optical lens array is used to focus and compress sunlight at a high magnification. The fiber optic adapter is used to connect to the front end of the fiber optic transmission device 2, i.e., the receiving end, and to position the receiving end of the fiber optic transmission device 2.

[0057] The optical lens array may include one optical lens combination or multiple optical lens combinations. The specific number of combinations is determined by the light energy required by the solar thermal energy storage tank 3. Each optical lens array corresponds to a set of solar tracking modules.

[0058] Specifically, optical lenses can be Fresnel lenses, spherical lenses, or aspherical lenses such as hyperboloid lenses. The lens material can be plastic, quartz glass, or other glass materials. The larger the diameter of the optical lens, the smaller the diameter of the light spot formed at the focal point, meaning a higher factor in sunlight concentration and compression, higher sunlight intensity (solar radiation power per unit area), and higher light-gathering efficiency.

[0059] Specifically, the optical fiber transmission device 2 is composed of optical fibers.

[0060] Specifically, the distance between the fiber optic adapter and the optical lens array is adjustable. This adjustable distance ensures that the focal point of the optical lens array accurately falls on the end face of the fiber optic receiver, maximizing the coupling of light energy into the receiver and improving light energy utilization.

[0061] Specifically, the optical fiber transmission device 2 is configured as a single optical fiber or an optical fiber bundle formed by multiple optical fibers. The receiving end of the optical fiber transmission device 2 is connected to the sunlight collection device 1, and the receiving end is located at the focal point of the optical axis of the optical lens; the transmitting end of the optical fiber transmission device 2 is configured as a single optical fiber or an optical fiber bundle composed of multiple optical fibers.

[0062] Specifically, the optical fiber transmission device 2 also includes a sunlight projector connected to the transmitting end of the optical fiber transmission device 2, which is used to position the optical fiber at the end of the optical fiber transmission device 2.

[0063] Specifically, the end of the optical fiber transmission device 2 may include one optical fiber or multiple optical fibers.

[0064] Specifically, the optical fiber transmission device 2 consists of multiple optical fibers. These fibers can be connected end-to-end directly or in a bundled configuration, where multiple fibers are combined into a single fiber. Direct fiber connections do not further compress sunlight, resulting in high fiber usage and cost. In contrast, bundled connections further compress sunlight during transmission.

[0065] Specifically, the sunlight projector includes a fiber optic connector for connecting to the fiber optic cable at the end of the fiber optic transmission device 2.

[0066] Specifically, the sunlight projector also includes a zoom optical lens, which is used to shape the light field of the highly focused light transmitted from the fiber optic transmission device 2 to obtain the light field distribution required by the photothermal energy storage tank 3. The light field distribution is set to the shape and size of the light spot.

[0067] Specifically, the zoom optical lens can be configured as a single zoom lens or a combination of multiple lenses. When the zoom lens module is a single zoom lens, the zoom lens is optically coaxial with the fiber optic adapter and located behind it. When the zoom lens moves to the left, the area of ​​the light spot output by the sunlight projector increases; when the zoom lens moves to the right, the area of ​​the light spot output by the sunlight projector decreases. Therefore, by adjusting the distance between the zoom lens and the fiber optic connector, i.e., the focal length, the light field distribution of the high-concentration light, i.e., the size of the light spot, can be adjusted, further concentrating and compressing sunlight, thus increasing the compression factor of the high-concentration light.

[0068] The solar projector adjusts the distribution of the highly concentrated light field, i.e., the shape and size of the light spot, according to the needs of the solar thermal energy storage device, so as to maximize the projection of highly concentrated light energy into the solar thermal energy storage tank 3, thereby improving the photothermal conversion efficiency. It should be noted that the higher the high-concentration power density output by the solar projector, the smaller the volume and the lighter the weight of the solar thermal energy storage tank 3, while obtaining the same amount of thermal energy, thus realizing the portability of the solar thermal energy storage tank 3.

[0069] Specifically, the solar projector is installed outside the solar thermal energy storage tank 3 and connected to the solar thermal energy storage tank 3, and the solar thermal energy storage tank 3 is equipped with one or more solar projectors.

[0070] Specifically, the fiber optic transmission device 2 is equipped with one or more sunlight projectors.

[0071] Specifically, there are also cases where the sunlight projector includes only a fiber optic connector and does not include a zoom lens module: some or all of the transmission fiber ends are precisely and densely fixed together, thereby projecting the high-concentration light energy from the fiber optic transmission device 2 at the maximum density. In this case, the high-concentration light field distribution emitted from the end face of the fiber optic cable fully meets the requirements of the photothermal energy storage device, without the need for light field shaping by the zoom lens module.

[0072] Specifically, the solar thermal energy storage tank 3 is equipped with a standardized interface 31 for quick connection with the solar projector. The standardized interface 31 can be configured as a magnetic interface or a snap-fit ​​interface.

[0073] Specifically, the solar thermal energy storage tank 3 is configured with a multi-layer composite structure, with the inner layer being a heat-absorbing coating, the middle layer being a phase change energy storage medium, and the outer layer being a vacuum insulation layer.

[0074] Specifically, the outer layer of the solar thermal energy storage tank 3 is configured as a single-layer vacuum insulation or a multi-layer vacuum insulation.

[0075] Specifically, the energy storage medium material in the intermediate layer of the solar thermal energy storage tank 3 is set as molten salt, metal phase change material or ceramic composite material.

[0076] Specifically, the solar thermal energy storage tank 3 is equipped with rollers or slide rails to facilitate its movement.

[0077] Specifically, the standardized interface 31 of the solar thermal energy storage tank 3 is provided with a single layer or multiple layers of quartz glass, and the space between two adjacent layers of multi-layer quartz glass is set as a vacuum. The transparent quartz glass is provided to ensure that the highly concentrated light is not lost during the process of passing through the glass, and the vacuum between two adjacent layers of quartz glass can also prevent the energy inside the solar thermal energy storage tank 3 from escaping from the interface.

[0078] Specifically, a heat exchanger 32 is installed on the solar thermal energy storage tank 3. The heat exchanger 32 is used to convert the heat stored in the solar thermal energy storage tank 3 into other forms of energy and release them to the outside. For example, the heat exchanger 32 can be installed at the bottom of the solar thermal energy storage tank 3 and connected to a steam turbine generator to convert the stored heat into electrical energy.

[0079] Specifically, the solar thermal energy storage tank 3 is a closed, highly insulated system capable of containing gases, liquids, solids, or mixtures thereof. The cavity is typically made of materials such as stainless steel, quartz, or borosilicate glass, and possesses a sophisticated control system for temperature, gas, and pressure. The solar thermal energy storage tank 3 can be a microchannel continuous flow cavity, with a diameter as small as tens of centimeters and a length reaching tens of centimeters or even several meters; its weight can be as light as less than 1 kilogram or less than 100 kilograms. The storage tank can be coated with a high-reflectivity optical thin film on the inner wall of its cavity to improve its light energy utilization rate and the uniform distribution of light energy within the cavity; alternatively, it can be coated with a high-absorptivity thermal thin film to improve the photothermal conversion efficiency.

[0080] Due to its small size and light weight, the solar thermal energy storage tank 3 can provide energy for automobiles, robots, ships, airplanes, residences, industries, etc.

[0081] Specifically, the length of the optical fiber transmission device 2 is set according to the location of the photothermal energy storage device so that the photothermal energy storage device can move freely within the length range of the optical fiber transmission device 2.

[0082] Specifically, the correspondence between the sunlight collection device 1 and the solar thermal energy storage tank 3 is set as follows: multiple sunlight collection devices 1 correspond to one solar thermal energy storage tank 3, or one sunlight collection device 1 corresponds to one solar thermal energy storage tank 3, or one sunlight collection device 1 corresponds to multiple solar thermal energy storage tanks 3, or multiple sunlight collection devices 1 correspond to multiple solar thermal energy storage tanks 3.

[0083] Specifically, this embodiment also includes an intelligent control system, which is used to allocate the correspondence between the sunlight collection device 1 and the solar thermal energy storage tank 3.

[0084] A specific implementation of a solar thermal energy storage system includes a sunlight collection device 1 composed of multiple optical lenses and a light transmission device composed of multiple optical fibers, which provides a high-concentration solar energy storage device.

[0085] The sunlight collection device 1 comprises 160 sunlight collectors with a total of 12,800 optical lenses with a diameter of 100 mm, and the fiber optic transmission device 2 comprises 12,800 optical fibers with a diameter of 1 mm. Under normal surface solar radiation power (1000 watts / square meter), it collects and outputs a total of 100,480 watts of highly concentrated sunlight. Ignoring optical coupling and light losses from the fiber optic transmission device 2, the light power projected onto the energy storage medium in the solar thermal energy storage tank 3 via the sunlight projector reaches as high as 100,480 watts, and the light power density reaches as high as 10 million watts / square meter.

[0086] Specifically, the solar projector can provide supplemental lighting and heating to multiple solar thermal energy storage tanks 3 in turn: the solar projector first provides supplemental lighting and heating to one of the solar thermal energy storage tanks 3, and after the supplemental lighting and heating is completed, it provides supplemental lighting and heating to the subsequent solar thermal energy storage tanks 3 in turn.

[0087] An embodiment of a solar thermal energy storage system with simultaneous supplemental lighting and heating using two solar thermal energy storage tanks 3 includes a solar energy collection device 1, an optical fiber transmission device 2, and solar thermal energy storage tanks 3. The solar energy collection device 1 comprises 16 solar collectors with 80 optical lenses each, each with a diameter of 100 mm. The optical fiber transmission device 2 comprises 1280 optical fibers, evenly divided into two bundles of 640 fibers each, which are connected to two solar projectors. The two solar projectors are inserted into the optical fiber interfaces of the two solar thermal energy storage tanks 3, respectively, directing the highly concentrated solar energy gathered and compressed by the solar energy collection device 1 through the optical windows into the solar thermal energy storage tanks 3, where it is converted into heat energy and stored in the energy storage medium.

[0088] Specifically, the solar thermal energy storage system based on fiber optic transmission technology includes not only a sunlight collection device 1, a fiber optic transmission device 2, and a solar thermal energy storage device, but also an intelligent control system. The intelligent control system, based on a sensor network, a central controller, and a motor power mechanism, can intelligently control the sunlight collection device 1 and the fiber optic transmission device 2, and dynamically allocate the fiber optic transmission path and the high-concentration sunlight projection of the sunlight projector, thereby enabling multiple energy storage tanks to alternately or simultaneously supplement light and heat while maintaining their status.

[0089] Two solar thermal energy storage tanks 3 are grouped together. The fiber optic transmission device 2, especially the sunlight projector, connects to two solar thermal energy storage tanks 3 simultaneously via a beam splitter, providing them with supplemental lighting and heat. When the heat stored in this group of solar thermal energy storage tanks 3 reaches the threshold, the system automatically switches to the next group of target tanks. This is similar to a production line, with tanks taking turns to supplement lighting and charge, and alternating between them. Groups of solar thermal energy storage tanks 3, filled with heat energy, leave the production line and are transported to various application scenarios.

[0090] Specifically, the solar thermal energy storage tank 3 has a built-in heat output module, which can support direct heating (such as building heating), drive a Stirling generator to generate electricity (for charging electric vehicles), or provide a high-temperature heat source for chemical reactions (such as green hydrogen energy production). For applications in electric vehicle charging, given the small size and light weight of the solar thermal energy storage tank 3, it can be installed directly onto the electric vehicle after the supplemental lighting and heating process is complete. The heat output module then drives the Stirling generator to generate electricity, thereby charging the electric vehicle. It should be noted that high-temperature molten salt can store 150 kWh of heat per kilogram, far exceeding the energy density of existing lithium iron phosphate batteries. Therefore, applying the solar thermal energy storage tank 3 to electric vehicle energy supply can extend the driving range of electric vehicles by hundreds or thousands of times under the same conditions, without any pollution or safety issues.

[0091] The solar thermal energy storage tank 3 can be reused. After the solar thermal energy storage tank 3 installed on the electric vehicle has completely released its heat energy, it can be removed from the electric vehicle and returned to the site for supplemental lighting and heating. Alternatively, the electric vehicle can be driven directly back to the site for supplemental lighting and heating without being removed. In this scenario, the sunlight collection device 1 and the fiber optic transmission device 2 are like a gas station, while the solar thermal energy storage tank 3 and the electric vehicle are like cars refueling at the gas station.

[0092] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A solar thermal energy storage system based on optical fiber transmission technology, characterized in that: Includes a sunlight collection device (1), which is used to concentrate and compress the sunlight energy emitted by the sun at a high multiple; Fiber optic transmission device (2), the fiber optic transmission device (2) is used to transmit sunlight after high-magnification aggregation and compression; And a solar thermal energy storage tank (3), which is used to receive high-multiplier concentrated and compressed sunlight transmitted by the optical fiber transmission device (2) and convert the light energy into heat energy and store it in the heat storage medium inside the tank. The solar thermal energy storage tank (3) is configured as a movable solar thermal energy storage tank (3). The optical fiber transmission device (2) also includes a sunlight projector connected to the transmitting end of the optical fiber transmission device (2), which is used to position the optical fiber at the end of the optical fiber transmission device (2). The sunlight projector also includes a zoom optical lens, which is used to shape the light field of the high-concentration light transmitted by the fiber optic transmission device (2) to obtain the light field distribution required by the photothermal energy storage tank (3). The light field distribution is set to the shape and size of the light spot. The solar thermal energy storage tank (3) is provided with a standardized interface (31) for quick connection with the solar projector. The standardized interface (31) can be set as a magnetic interface or a snap-fit ​​interface.

2. The solar thermal energy storage system based on optical fiber transmission technology according to claim 1, characterized in that: The sunlight collection device (1) consists of at least one sunlight collector; The sunlight collector includes a sunlight collection module, a solar sensor, and a dual-axis motor power mechanism.

3. A solar thermal energy storage system based on optical fiber transmission technology according to claim 2, characterized in that: The sunlight collection module includes an optical lens array, which is used to focus and compress sunlight at a high magnification. And an optical fiber adapter, which is used to connect to the front end of the optical fiber transmission device (2), that is, the receiving end, and to position the receiving end of the optical fiber transmission device (2).

4. A solar thermal energy storage system based on optical fiber transmission technology according to claim 3, characterized in that: The distance between the fiber optic adapter and the optical lens array is set to be adjustable.

5. A solar thermal energy storage system based on optical fiber transmission technology according to claim 1, characterized in that: The optical fiber transmission device (2) is configured as a single optical fiber or an optical fiber bundle formed by binding multiple optical fibers together.

6. A solar thermal energy storage system based on optical fiber transmission technology according to claim 3, characterized in that: The receiving end of the optical fiber transmission device (2) is connected to the sunlight collection device (1), and the receiving end is located at the focal point of the optical axis of the optical lens; The transmitting end of the optical fiber transmission device (2) is configured as a single optical fiber or an optical fiber bundle composed of multiple optical fibers.

7. A solar thermal energy storage system based on optical fiber transmission technology according to claim 6, characterized in that: The optical fiber transmission device (2) is composed of multiple optical fibers. The multiple optical fibers are configured to be directly connected end-to-end, or they can be configured to be connected by an end-to-end optical fiber bundle. The optical fiber bundle is configured to combine multiple optical fibers into one optical fiber.

8. A solar thermal energy storage system based on optical fiber transmission technology according to claim 6, characterized in that: The sunlight projector includes a fiber optic connector for connecting to the fiber optic cable at the end of the fiber optic transmission device (2).

9. A solar thermal energy storage system based on optical fiber transmission technology according to claim 8, characterized in that: The zoom optical lens is configured as a single zoom lens or a combination of multiple lenses.

10. A solar thermal energy storage system based on optical fiber transmission technology according to claim 1, characterized in that: The solar projector is located outside the solar thermal energy storage tank (3) and connected to the solar thermal energy storage tank (3). The solar thermal energy storage tank (3) is equipped with one or more solar projectors.

11. A solar thermal energy storage system based on optical fiber transmission technology according to claim 1, characterized in that: The optical fiber transmission device (2) is equipped with one or more sunlight projectors.

12. A solar thermal energy storage system based on optical fiber transmission technology according to claim 6, characterized in that: The solar thermal energy storage tank (3) is configured as a multi-layer composite structure, with the inner layer being a heat-absorbing coating, the middle layer being a phase change energy storage medium, and the outer layer being a vacuum insulation layer.

13. A solar thermal energy storage system based on optical fiber transmission technology according to claim 12, characterized in that: The outer layer of the solar thermal energy storage tank (3) is configured as a single-layer vacuum insulation or a multi-layer vacuum insulation.

14. A solar thermal energy storage system based on optical fiber transmission technology according to claim 12, characterized in that: The energy storage medium material in the middle layer of the solar thermal energy storage tank (3) is set as molten salt, metal phase change material or ceramic composite material.

15. A solar thermal energy storage system based on optical fiber transmission technology according to claim 1, characterized in that: The solar thermal energy storage tank (3) is provided with rollers or slide rails to facilitate the movement of the solar thermal energy storage tank (3).

16. A solar thermal energy storage system based on optical fiber transmission technology according to claim 11, characterized in that: The standardized interface (31) of the solar thermal energy storage tank (3) is provided with a single layer or multiple layers of quartz glass, and the space between two adjacent layers of quartz glass is set as a vacuum.

17. A solar thermal energy storage system based on optical fiber transmission technology according to claim 11, characterized in that: The solar thermal energy storage tank (3) is equipped with a heat exchanger (32), which is used to convert the heat stored in the solar thermal energy storage tank (3) into other forms of energy and release it to the outside.

18. A solar thermal energy storage system based on optical fiber transmission technology according to claim 1, characterized in that: The solar thermal energy storage tank (3) is configured as a microchannel continuous flow cavity.

19. A solar thermal energy storage system based on optical fiber transmission technology according to claim 1, characterized in that: The inner wall of the photothermal energy storage tank (3) is coated with a layer of high reflectivity optical film.

20. A solar thermal energy storage system based on optical fiber transmission technology according to claim 1, characterized in that: The length of the optical fiber transmission device (2) is set according to the position of the photothermal energy storage tank (3).

21. A solar thermal energy storage system based on optical fiber transmission technology according to claim 1, characterized in that: The correspondence between the sunlight collection device (1) and the solar thermal energy storage tank (3) is set as follows: Multiple solar energy collection devices (1) correspond to one solar thermal energy storage tank (3), or One solar energy collection device (1) corresponds to one solar thermal energy storage tank (3), or One solar energy collection device (1) corresponds to multiple solar thermal energy storage tanks (3), or Multiple solar energy collection devices (1) correspond to multiple solar thermal energy storage tanks (3).

22. A solar thermal energy storage system based on optical fiber transmission technology according to claim 20, characterized in that: It also includes an intelligent control system, which is used to allocate the correspondence between the solar collection device (1) and the solar thermal energy storage tank (3).

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