Tower type solar photo-thermal mirror field

Abstract

The utility model relates to a tower type solar photo-thermal mirror field, the tower type solar photo-thermal mirror field comprises a heat collection tower, multiple layers of heliostats, a controller and a meteorological acquisition element, the multiple layers of heliostats are concentrically arranged at intervals by taking the heat collection tower as the circle center, and each layer of heliostats comprises a plurality of heliostats; the heliostat comprises a support assembly and a heliostat body, the heliostat body is hinged to the support assembly, and the end, away from the heliostat body, of the support assembly is fixedly connected to the ground. The controller is in communication connection with the heliostat; the meteorological acquisition element is arranged on the heliostat and is in communication connection with the controller, the meteorological acquisition element can acquire current wind direction and wind power data, and the controller is used for controlling the mirror body to rotate according to the data until the included angle between the mirror surface of the mirror body and the ground is within a preset range and enabling the rotated mirror body to be relatively fixed with the bracket assembly. By means of the structure, the heliostat is in an urgent danger avoiding state so as to prevent the heliostat and the support assembly from being damaged due to wind power and wind direction changes, and therefore the operation reliability of the tower type solar photo-thermal mirror field is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of tower solar thermal power generation technology, and in particular to a tower solar thermal mirror field. Background Technology

[0002] Tower solar thermal power generation uses numerous heliostats (equipped with a dual-axis tracking system) to reflect sunlight onto an absorber at the top of the collector tower. The focused light energy is then converted into high-temperature heat energy. The heat energy is transferred to a thermal storage system via a heat transfer medium (such as molten salt), and then a steam generator produces high-temperature, high-pressure steam to drive a turbine generator to produce electricity, ultimately achieving the conversion of light energy into heat energy into electrical energy.

[0003] The solar thermal field consists of thousands to tens of thousands of heliostats arranged in concentric circles or a matrix. Each heliostat is equipped with a dual-axis tracking system to ensure that sunlight is accurately reflected to the receiver at the top of the solar tower. Current tower-type solar thermal field technologies do not consider special operating conditions such as cleaning and emergency avoidance. This makes it impossible to adjust the heliostats to the appropriate state for emergency situations such as strong winds or communication signal interruptions, potentially leading to safety hazards due to the heliostats operating under special conditions. Utility Model Content

[0004] Therefore, it is necessary to provide a tower-type solar thermal mirror field to address the technical problem that existing tower-type solar thermal mirror fields cannot avoid risks under special operating conditions, which can easily lead to safety hazards when heliostats operate under special conditions.

[0005] A tower-type solar thermal mirror field, the tower-type solar thermal mirror field comprising:

[0006] Heat collection tower;

[0007] A multi-layered heliostat, wherein the multiple heliostats are arranged concentrically with the solar collector as the center, and each layer of the heliostats includes multiple heliostats; the heliostat includes a support assembly and a mirror body, the mirror body is hinged to the support assembly, and one end of the support assembly opposite to the mirror body is fixedly connected to the ground;

[0008] The controller is communicatively connected to the heliostat; and

[0009] A meteorological data acquisition element is mounted on the heliostat and is communicatively connected to the controller. The meteorological data acquisition element can collect current wind direction and wind force data. The controller is used to control the rotation of the mirror body according to the data until the angle between the mirror surface of the mirror body and the ground is within a preset range, and to fix the mirror body relative to the support assembly after the rotation is completed.

[0010] In one embodiment, the support assembly includes:

[0011] A support column, one end of which is fixedly connected to the ground, and the other end extends in a direction away from the ground;

[0012] An adjusting column, one end of which is hinged to the support column via a first motor, and the other end of which is hinged to the mirror body via a second motor;

[0013] The controller is communicatively connected to the first motor and the second motor, and the controller can control the rotation and locking of the output shafts of the first motor and the second motor.

[0014] In one embodiment, the axes of the output shafts of the first motor and the second motor are perpendicular.

[0015] In one embodiment, the axis of the support column is perpendicular to the axis of the adjustment column.

[0016] In one embodiment, the controller is used to control the mirror surface of the mirror body to rotate to an angle between 10° and 20° with the ground based on the data.

[0017] In one embodiment, the controller is further configured to control the heliostat to rotate to its nighttime return state when the efficiency of a single heliostat is below an efficiency threshold; so that the angle between the mirror surface of the mirror and the ground is between 8° and 12°, and the projection of the normal of the heliostat onto the ground is between 8° and 12° east of south.

[0018] In one embodiment, the tower-type solar thermal mirror field further includes:

[0019] A solar intensity acquisition module is communicatively connected to the controller and is used to acquire solar intensity. The controller is also used to calculate the efficiency of the heliostat based on the solar intensity.

[0020] In one embodiment, the heliostat further includes:

[0021] A cleaning brush is movably connected to the mirror body;

[0022] The controller is also used to control the mirror body to rotate to be perpendicular to the ground so that the heliostat is in a cleaning state, and the cleaning brush moves from top to bottom relative to the mirror body to sweep away the dust on the mirror surface.

[0023] In one embodiment, the cleaning brush includes:

[0024] A support arm is movably connected to the mirror body, and the support arm is movable relative to the mirror body;

[0025] The pivot is rotatably connected to the support arm;

[0026] The roller brush is fixedly connected to the rotating shaft;

[0027] The support arm moves relative to the mirror body, and the roller brush at least partially abuts against the mirror surface and can roll relative to the mirror surface.

[0028] In one embodiment, a heat absorber is provided on the solar collector tower, and the light spot of the heliostat is projected onto the heat absorber. The tower-type solar thermal mirror field further includes:

[0029] A light spot acquisition module is communicatively connected to the controller and is used to acquire the light spot projected by the heliostat. The controller is also used to control the heliostat corresponding to the light spot to rotate so that the light spot can be projected onto the receiver when the light spot deviates from the receiver.

[0030] The beneficial effects of this utility model are:

[0031] This invention provides a tower-type solar thermal mirror field. The solar collector tower is the core facility in the tower-type solar thermal mirror field, mainly used to convert solar energy into heat or electricity. By arranging multiple heliostats concentrically around the solar collector tower, the mirror surfaces of the heliostats precisely reflect sunlight onto the surface of the absorber at the top of the solar collector tower by tracking the solar azimuth and elevation angles in real time, forming a high-temperature focusing point. The support assembly in the heliostat supports the mirror body. By hinged to the support assembly, the mirror body can rotate relative to the support assembly, allowing the mirror surface to track the solar azimuth and elevation angles in real time. By communicating with the heliostat, the controller can control the rotation of the heliostat body relative to the support assembly, thereby tracking the solar azimuth and elevation angles in real time. By setting up meteorological data acquisition elements and placing them on the heliostat, the wind force and direction around the heliostat are collected. The controller then controls the rotation of the heliostat body according to the wind direction and force data collected by the meteorological data acquisition elements, so that the angle between the mirror surface and the ground is within a preset range, and the mirror body is fixed relative to the support assembly. This puts the heliostat in an emergency avoidance state to prevent damage to the heliostat and support assembly caused by changes in wind force and direction, thereby ensuring the reliability of the tower solar thermal mirror field operation. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the layout of a tower-type solar thermal mirror field provided in an embodiment of the present invention.

[0033] Figure 2 This is a schematic diagram of a heliostat in a tower-type solar thermal mirror field provided in an embodiment of the present invention.

[0034] Figure 3This is a schematic diagram showing the connection between the cleaning brush and the mirror body in a tower-type solar thermal mirror field according to an embodiment of the present invention.

[0035] Figure label:

[0036] 100. Solar collector tower; 200. Heliostat; 210. Support assembly; 211. Support column; 212. Adjustment column; 213. First motor; 214. Second motor; 220. Mirror body; 300. Cleaning brush; 310. Support arm; 320. Roller brush. Detailed Implementation

[0037] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0038] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0042] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0043] See Figures 1 to 3 This utility model provides a tower-type solar thermal mirror field, which includes a heat collection tower 100, multiple heliostats 200, a controller, and a meteorological data acquisition element. The multiple heliostats 200 are arranged concentrically with the heat collection tower 100 as the center, and each layer of heliostats 200 includes multiple heliostats 200. Each heliostat 200 includes a support assembly 210 and a mirror body 220. The mirror body 220 is hinged to the support assembly 210, and one end of the support assembly 210 away from the mirror body 220 is fixedly connected to the ground. The controller is communicatively connected to the heliostats 200. The meteorological data acquisition element is located on the heliostat 200 and is communicatively connected to the controller. The meteorological data acquisition element can collect current wind direction and wind force data. The controller is used to control the mirror body 220 to rotate until the angle between the mirror surface of the mirror body 220 and the ground is within a preset range, and to fix the mirror body 220 relative to the support assembly 210 after rotation.

[0044] In this technical solution, a tower-type solar thermal mirror field is provided. The collector tower 100 is the core facility of the tower-type solar thermal mirror field, mainly used to convert solar energy into heat or electricity. By arranging multiple heliostats 200 concentrically around the collector tower 100, the mirror surfaces of the heliostats 200 accurately reflect sunlight onto the surface of the absorber at the top of the collector tower 100 by tracking the solar azimuth and elevation angles in real time, forming a high-temperature focusing point. The support assembly 210 in the heliostat 200 supports the mirror body 220. By hinged to the support assembly 210, the mirror body 220 can rotate relative to the support assembly 210, thereby enabling the mirror surface of the mirror body 220 to track the solar azimuth and elevation angles in real time. By communicating with the heliostat 200, the controller can control the rotation of the mirror body 220 relative to the support assembly 210, thereby tracking the solar azimuth and elevation angles in real time. By setting up a meteorological data acquisition element and placing it on the heliostat 200, the wind force and direction of the environment around the heliostat 200 are collected through the meteorological data acquisition element. The controller controls the mirror body 220 to rotate until the angle between the mirror surface of the mirror body 220 and the ground is within a preset range, and the mirror body 220 is fixed relative to the support assembly 210. This puts the heliostat 200 in an emergency avoidance state to prevent damage to the heliostat 200 and the support assembly 210 caused by changes in wind force and direction, thereby ensuring the reliability of the tower solar thermal mirror field operation.

[0045] Specifically, the meteorological data acquisition element is a meteorological sensor, which can detect parameters such as wind speed, wind direction, temperature, humidity, air pressure, and rainfall. In this embodiment, it is mainly used to detect wind speed, i.e., wind force and wind direction. After the controller obtains the wind force and wind direction data collected by the meteorological data acquisition element, it can calculate the wind force effect value obtained by the mirror. When the wind force effect value obtained by the mirror is close to the maximum load-bearing capacity of the heliostat 200 and the support assembly 210, that is, when the maximum upper limit minus the alarm threshold is reached, the controller controls the heliostat 200 to rotate to the emergency avoidance state.

[0046] In some embodiments, the controller controls the rotation of the mirror surface of the heliostat 220 to an angle between 10° and 20° with respect to the ground based on data. Specifically, the controller plans the optimal adjustment route for the heliostat 200 based on wind force and direction data, and controls the rotation of the mirror surface of the heliostat 200 to an angle between 10° and 20° with respect to the ground. As a preferred embodiment, the mirror surface of the heliostat 200 is rotated to a position with an angle of approximately 15 degrees with respect to the ground. Simultaneously, the first motor 213 and the second motor 214 (described below) are kept stationary to lock the attitude of the heliostat 200, preventing damage to the heliostat 200 and the support assembly 210 caused by changes in wind force and direction.

[0047] In one specific embodiment, when the controller rotates the mirror 220 to the emergency avoidance state, the mirror surface of the mirror 220 rotates to an angle of 10° with the ground; in another specific embodiment, when the controller rotates the mirror 220 to the emergency avoidance state, the mirror surface of the mirror 220 rotates to an angle of 15° with the ground; in yet another specific embodiment, when the controller rotates the mirror 220 to the emergency avoidance state, the mirror surface of the mirror 220 rotates to an angle of 20° with the ground.

[0048] like Figure 2 As shown, in one embodiment, the support assembly 210 includes a support column 211 and an adjustment column 212. One end of the support column 211 is fixedly connected to the ground, and the other end extends in a direction away from the ground. One end of the adjustment column 212 is hinged to the support column 211 via a first motor 213, and the other end of the adjustment column 212 is hinged to the mirror body 220 via a second motor 214. The controller is communicatively connected to the first motor 213 and the second motor 214, and the controller can control the rotation and locking of the output shafts of the first motor 213 and the second motor 214.

[0049] In this embodiment, the support column 211 is fixedly connected to the concrete structure embedded in the foundation. The support column 211 can be a circular column or a square column. A first motor 213 is provided at the top of the support column 211, and the output shaft of the first motor 213 is fixedly connected to the adjusting column 212. The adjusting column 212 can be a circular column or a square column. A second motor 214 is provided at the end of the adjusting column 212 opposite to the support column 211, and the output shaft of the second motor 214 is fixedly connected to the mirror body 220. When the output shaft of the second motor 214 rotates relative to the adjusting column 212, the mirror body 220 rotates relative to the adjusting column 212. By communicating with the first motor 213 and the second motor 214, the controller can control the start and stop of the first motor 213 and the second motor 214, as well as the rotation direction of the first motor 213 and the second motor 214.

[0050] The adjusting column 212 is hinged to the support column 211 via the first motor 213, allowing the adjusting column 212 to rotate relative to the support column 211, thereby driving the mirror body 220 to rotate relative to the support column 211. The mirror body 220 is hinged to the adjusting column 212 via the second motor 214, allowing the mirror body 220 to rotate relative to the adjusting column 212, thus giving the mirror body 220 two rotational degrees of freedom, enabling the mirror body 220 to rotate 360° relative to the bottom surface.

[0051] Furthermore, the output shafts of the first motor 213 and the second motor 214 are perpendicular to each other. For example... Figure 2As shown, in one embodiment, the axis of the support column 211 is perpendicular to the axis of the adjustment column 212. By setting the axis of the support column 211 to be perpendicular to the axis of the adjustment column 212, the mirror body 220 is supported while facilitating relative rotation between the adjustment column 212 and the support column 211. Furthermore, by setting the output shafts of the first motor 213 and the second motor 214 to be perpendicular, the mirror body 220 can rotate 360° relative to the ground or the support column 211 through the rotation of the first motor 213 and the second motor 214, thereby enabling the mirror body 220 to track the solar azimuth and elevation angles in real time.

[0052] In one embodiment, the controller is also configured to control the heliostat 200 to rotate to the nighttime return state when the efficiency of a single heliostat 200 is below an efficiency threshold; so that the angle between the mirror surface of the mirror body 220 and the ground is between 8° and 12°, and the projection of the normal of the heliostat 200 onto the ground is between 8° and 12° east of south.

[0053] When the efficiency of a single heliostat 200 falls below the efficiency threshold, the controller rotates the heliostat 200 to its nighttime return position to protect it from damage in case of an emergency at night. Specifically, when the heliostat 200 is in its nighttime return position, the angle between the mirror surface of the mirror body 220 and the ground is between 8° and 12°, and the projection of the normal of the heliostat 200 onto the ground is between 8° and 12° east of south.

[0054] In one specific embodiment, when the heliostat 200 is in its nighttime return-to-position state, the angle between the mirror surface of the mirror body 220 and the ground is 8°, and the projection of the normal of the heliostat 200 onto the ground is 8° east of south. In another specific embodiment, when the heliostat 200 is in its nighttime return-to-position state, the angle between the mirror surface of the mirror body 220 and the ground is 10°, and the projection of the normal of the heliostat 200 onto the ground is 10° east of south. In yet another specific embodiment, when the heliostat 200 is in its nighttime return-to-position state, the angle between the mirror surface of the mirror body 220 and the ground is 12°, and the projection of the normal of the heliostat 200 onto the ground is 12° east of south.

[0055] In one embodiment, the tower-type solar thermal mirror field also includes a solar intensity acquisition module, which is communicatively connected to a controller to acquire light intensity. The controller is also used to calculate the efficiency of the heliostat 200 based on the light intensity.

[0056] Specifically, the solar intensity acquisition module is a solar intensity acquisition instrument, which can obtain solar intensity data. The solar trajectory module in the tower-type solar thermal mirror field can obtain operational data such as the solar trajectory elevation angle or azimuth angle. The controller can calculate the current efficiency of the corresponding heliostat 200 based on the solar intensity data and the solar trajectory elevation angle or azimuth angle. When the operating efficiency of the heliostat 200 is lower than the efficiency threshold, the controller controls the heliostat 200 to rotate to its nighttime return position.

[0057] like Figure 3 As shown, in one embodiment, the heliostat 200 further includes a cleaning brush 300, which is movably connected to the mirror body 220. The controller is also used to control the mirror body 220 to rotate to be perpendicular to the ground so that the heliostat 200 is in a cleaning state, and the cleaning brush 300 moves from top to bottom relative to the mirror body 220 to brush the dust on the mirror surface.

[0058] A cleaning brush 300 is provided on the mirror body 220 of the heliostat 200 and movably connected to the mirror body 220, allowing the cleaning brush 300 to move up and down relative to the mirror body 220. In this embodiment, when the mirror surface of the mirror body 220 is severely dirty, affecting the efficiency of the heliostat 200, the controller controls the mirror body 220 to rotate until it is perpendicular to the ground; and the controller can control the cleaning brush 300 to move relative to the mirror body 220, using the cleaning brush 300 to sweep away dust and dirt from the mirror surface. When the mirror body 220 is in the cleaning state, the mirror surface is perpendicular to the ground, so that when the cleaning brush 300 sweeps the mirror surface, the dust swept off easily falls downwards and is thus swept away from the mirror surface.

[0059] It is understood that the cleaning brush 300 can move relative to the mirror body 220 manually or automatically. In this embodiment, the latter is used. The cleaning brush 300 is connected to the mirror body 220 through a transmission assembly. The drive component on the transmission assembly is communicatively connected to the controller. The controller controls the operation of the drive component, thereby driving the cleaning brush 300 to move relative to the mirror body 220.

[0060] In one embodiment, the cleaning brush 300 includes a support arm 310, a rotating shaft, and a roller brush 320. The support arm 310 is movably connected to the mirror body 220 and is movable relative to the mirror body 220. The rotating shaft is rotatably connected to the support arm 310. The roller brush 320 is fixedly connected to the rotating shaft. The support arm 310 moves relative to the mirror body 220, and the roller brush 320 at least partially abuts against the mirror surface and is able to roll relative to the mirror surface.

[0061] Specifically, the support arm 310 is connected to the mirror body 220 via a transmission assembly. This transmission assembly can be a lead screw drive, a rack and pinion assembly, or a linkage mechanism. Connecting the support arm 310 to the transmission assembly allows the support arm 310 to move relative to the mirror body 220. By rotatably connecting the rotating shaft to the support arm 310 and fixing the roller brush 320 to the rotating shaft, when the support arm 310 moves relative to the mirror body 220, the friction between the roller brush 320 and the mirror surface causes the roller brush 320 to rotate relative to the mirror body 220, thereby removing dust.

[0062] In one embodiment, a heat collector is provided on the heat collection tower 100, and the light spot of the heliostat 200 is projected onto the heat collector. The tower-type solar thermal mirror field also includes a light spot acquisition module, which is communicatively connected to the controller and is used to acquire the light spot projected by the heliostat 200. The controller is also used to control the heliostat 200 corresponding to the light spot to rotate so that the light spot can be projected onto the heat collector when the light spot deviates from the heat collector.

[0063] The light spot on the heliostat 200 is acquired in real time by the light spot acquisition module. When the light spot deviates from the receiver, the controller can adjust the angle between the heliostat 200 and the receiver in real time, so that the light spot can be projected onto the receiver, thereby ensuring the thermal balance of the receiver surface. In this embodiment, the light spot acquisition module can be an image acquisition device such as an industrial camera.

[0064] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A tower-based solar thermal mirror field, characterized in that, The tower-type solar thermal mirror field includes: Heat collection tower; A multi-layered heliostat, wherein the multiple heliostats are arranged concentrically with the solar collector as the center, and each layer of the heliostats includes multiple heliostats; the heliostat includes a support assembly and a mirror body, the mirror body is hinged to the support assembly, and one end of the support assembly opposite to the mirror body is fixedly connected to the ground; The controller is communicatively connected to the heliostat; and A meteorological data acquisition element is mounted on the heliostat and is communicatively connected to the controller. The meteorological data acquisition element can collect current wind direction and wind force data. The controller is used to control the rotation of the mirror body according to the data until the angle between the mirror surface of the mirror body and the ground is within a preset range, and to fix the mirror body relative to the support assembly after the rotation is completed.

2. The tower-based solar optical thermal mirror field of claim 1, wherein, The support assembly includes: A support column, one end of which is fixedly connected to the ground, and the other end extends in a direction away from the ground; An adjusting column, one end of which is hinged to the support column via a first motor, and the other end of which is hinged to the mirror body via a second motor; The controller is communicatively connected to the first motor and the second motor, and the controller can control the rotation and locking of the output shafts of the first motor and the second motor.

3. The tower-based solar optical thermal mirror field of claim 2, wherein, The output shaft axes of the first motor and the second motor are perpendicular.

4. The tower-based solar optical thermal mirror field of claim 2, wherein, The axis of the support column is perpendicular to the axis of the adjustment column.

5. The tower-based solar optical thermal mirror field of claim 1, wherein, The controller is used to control the mirror surface of the mirror body to rotate to an angle between 10° and 20° with the ground based on the data.

6. The tower-based solar optical thermal mirror field of claim 1, wherein, The controller is also used to control the heliostat to rotate to the nighttime return state when the efficiency of a single heliostat is lower than the efficiency threshold; so that the angle between the mirror surface of the mirror body and the ground is between 8° and 12°, and the projection of the normal of the heliostat on the ground is between 8° and 12° east of south.

7. The tower-based solar optical thermal mirror field of claim 6, wherein, The tower-type solar thermal mirror field also includes: A solar intensity acquisition module is communicatively connected to the controller and is used to acquire solar intensity. The controller is also used to calculate the efficiency of the heliostat based on the solar intensity.

8. The tower-based solar optical thermal mirror field of claim 1, wherein, The heliostat also includes: A cleaning brush is movably connected to the mirror body; The controller is also used to control the mirror body to rotate to be perpendicular to the ground so that the heliostat is in a cleaning state, and the cleaning brush moves from top to bottom relative to the mirror body to sweep away the dust on the mirror surface.

9. The tower-based solar optical thermal mirror field of claim 8, wherein, The cleaning brush includes: A support arm is movably connected to the mirror body, and the support arm is movable relative to the mirror body; The pivot is rotatably connected to the support arm; The roller brush is fixedly connected to the rotating shaft; The support arm moves relative to the mirror body, and the roller brush at least partially abuts against the mirror surface and can roll relative to the mirror surface.

10. The tower-based solar optical thermal mirror field of claim 1, wherein, The solar collector tower is equipped with a heat absorber, and the light spot of the heliostat is projected onto the heat absorber. The tower-type solar thermal mirror field also includes: A light spot collection module is in communication connection with the controller, and is configured to collect the light spot projected by the heliostat. The controller is further configured to control the heliostat corresponding to the light spot to rotate to the light spot being able to project on the heat absorber when the light spot deviates from the heat absorber.

Images