A Fresnel solar thermal system

Abstract

The utility model relates to the technical field of solar heat utilization, disclose a kind of Fresnel solar heat utilization system, the system includes greenhouse structure of light transmission, linear Fresnel solar light concentration heat utilization device is equipped in greenhouse structure, the device includes Fresnel lens, heat collection component and tracking mechanism, heat collection component includes heat collection pipe, heat collection pipe is located at the light concentration side of Fresnel lens, and Fresnel lens is located on tracking mechanism;Greenhouse structure bottom is provided with light transmission isolation layer, and light transmission isolation layer is connected with light transmission side wall to form air supply air duct, and the circumferential side of greenhouse structure is equipped with cylindrical ventilation tower, and the air inlet of air supply channel is communicated with outside, and the air outlet is communicated with cylindrical ventilation tower;Wind turbine is equipped in cylindrical ventilation tower.In the system, greenhouse structure can block outside pollutants to fall on Fresnel lens, so that Fresnel lens maintains good light transmission, and ensures the solar energy utilization rate of device;Hot air current power generation system is formed below greenhouse structure, to further improve solar energy utilization rate.

Description

Technical Field

[0001] This utility model relates to the field of solar thermal utilization technology, and in particular to a Fresnel solar thermal utilization system. Background Technology

[0002] Concentrated solar thermal utilization focuses solar energy, using a high-temperature medium for heat collection and exchange, and then supplies heat or drives a steam turbine to generate electricity. Among these technologies, linear Fresnel solar thermal utilization has become the mainstream trend due to its relatively low cost. Currently, linear Fresnel solar thermal utilization technology mainly uses mirrors near the ground to concentrate light onto high-altitude heat collection tubes. Both the mirrors and the heat collection tubes are exposed to the atmosphere, making cleaning and maintenance inconvenient. The low reflectivity of the mirrors leads to low solar energy utilization efficiency. Furthermore, within the system's footprint, only sunlight reflected by the mirrors is utilized, leaving much solar thermal energy untapped, resulting in low solar energy utilization and consequently low system heat generation and power generation efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a Fresnel solar thermal utilization system. In this system, a greenhouse structure forms a protective cover around the linear Fresnel solar concentrator, preventing dust, debris, and other pollutants from the external environment from falling onto the Fresnel lens. This ensures that the Fresnel lens maintains good light transmittance, which is beneficial for guaranteeing the solar energy utilization rate of the linear Fresnel solar concentrator. A wind supply channel is formed below the greenhouse structure and connects with a cylindrical ventilation tower to form a solar thermal energy generation system, further improving the solar energy utilization rate.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A Fresnel solar thermal utilization system includes:

[0006] A greenhouse structure, comprising: a translucent roof and translucent sidewalls connected to the periphery of the translucent roof, wherein an interior space is formed between the translucent roof and the translucent sidewalls;

[0007] The indoor space is equipped with a linear Fresnel solar thermal concentrator, which includes a Fresnel lens, a heat collection assembly, and a tracking mechanism. The heat collection assembly includes a heat collection tube located on the concentrating side of the Fresnel lens. The Fresnel lens is mounted on the tracking mechanism, which drives the Fresnel lens to track the sun so that the focal point of the Fresnel lens always falls on the heat collection tube.

[0008] A light-transmitting isolation layer is provided at the bottom of the greenhouse structure. The periphery of the light-transmitting isolation layer is connected to the light-transmitting sidewall of the greenhouse structure, so that the space between the light-transmitting isolation layer and the bottom side of the greenhouse structure forms an air supply channel. The air supply channel has an air inlet and an air outlet, and the air inlet is connected to the atmospheric environment.

[0009] A cylindrical ventilation tower is provided on one side of the greenhouse structure, and the bottom of the cylindrical ventilation tower is connected to the air outlet of the air supply channel; a wind turbine is installed inside the cylindrical ventilation tower.

[0010] In the aforementioned Fresnel solar thermal utilization system, the linear Fresnel solar concentrator is installed within the greenhouse structure. The greenhouse structure forms a protective layer on the outside of the linear Fresnel solar concentrator, preventing dust, debris, and other pollutants from the external environment from falling onto the Fresnel lens. This ensures the Fresnel lens maintains good light transmittance, and the greenhouse structure's good light transmittance does not affect the Fresnel lens's light concentration, guaranteeing high solar energy utilization and improving the overall solar energy efficiency of the system. This also enhances the heat collection efficiency of the linear Fresnel solar concentrator. Furthermore, a wind supply channel is installed at the bottom of the greenhouse structure, forming a solar thermal power generation system with the cylindrical ventilation tower. This further utilizes solar energy, further improving the overall solar energy utilization efficiency of the Fresnel solar thermal utilization system. When the system only requires heating, no external power supply is needed. In addition, the greenhouse structure has a simple frame, is easy to construct, and can be standardized and modularized. The exterior of the greenhouse structure is easy to clean and maintain, ensuring cleanliness and maintaining light transmittance, thus improving the system's solar energy utilization efficiency and ultimately enhancing the overall system's heat production and power generation efficiency.

[0011] Optionally, the tracking mechanism includes: a frame for mounting the Fresnel lens, an inclinometer mounted on the frame, and a drive assembly for driving the frame to move circumferentially about the axis of the heat collection tube.

[0012] Optionally, the driving component includes:

[0013] An arc-shaped gear disk has external teeth on its convex side and its concave side facing the heat collection tube, and the position of the arc-shaped gear disk and the heat collection tube is relatively fixed.

[0014] The gear has external teeth that mesh with the external teeth of the arc-shaped gear disk. The frame is located on the protruding side of the arc-shaped gear disk, and the gear is connected to the frame via a gear shaft.

[0015] A power assembly, which is connected to the gear shaft for driving the gear to rotate;

[0016] A balancing component, connected to the frame, is used to maintain the plane containing the Fresnel lens tangent to the outer contour of the arc-shaped gear disk.

[0017] Optionally, the balancing assembly includes a hoisting assembly, which includes a first suspension device and a second suspension device. The first suspension device and the second suspension device are located on the side of the frame away from the arc-shaped gear disk, and the first suspension device and the second suspension device are respectively located opposite each other in the frame and on both sides of the gear shaft circumferentially.

[0018] The first suspension device includes a first traction rope and a first rope retraction device for retracting and extending the first traction rope, wherein the free end of the first traction rope is connected to the side of the frame near the first suspension device.

[0019] The second suspension device includes a second traction rope and a second rope retraction device for retracting and extending the second traction rope, wherein the free end of the second traction rope is connected to the side of the frame near the second suspension device.

[0020] Optionally, the first rope winding device includes: a first reel and a first motor that is pulsatingly connected to the first reel, the first traction rope being wound on the first reel, and the axis of the first reel being parallel to the axis of the gear shaft.

[0021] The second rope winding device includes a second reel and a second motor that is motive-connected to the second reel. The second traction rope is wound on the second reel, and the axis of the second reel is parallel to the axis of the first reel.

[0022] Optionally, the Fresnel solar thermal utilization system further includes a control device, wherein the inclinometer, the power assembly, and the first motor and the second motor are all signal-connected to the control device.

[0023] Optionally, the power component includes an electric motor.

[0024] Optionally, the heat collection assembly further includes: a base frame assembly disposed on the focusing side of the Fresnel lens and used to support the heat collection tube, the base frame assembly including: a base frame, a bracket and an elastic steel plate, the heat collection tube being mounted on the bracket, the bracket being mounted on the base frame via the elastic steel plate, and the elastic steel plate being capable of elastic deformation along the extension direction of the axis of the heat collection tube.

[0025] Optionally, the air supply channel is equipped with heat storage material.

[0026] Optionally, the wind turbine is connected to a battery. Attached Figure Description

[0027] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. Wherein:

[0028] Figure 1 This invention provides a schematic diagram of a Fresnel solar thermal utilization system according to an embodiment of the present invention.

[0029] Icons: 1-Transparent roof; 2-Transparent sidewall; 3-Heat collector pipe; 4-Transparent insulation layer; 5-Cylindrical ventilation tower; 6-Wind turbine; 7-Frame; 8-Inclinometer; 9-Circular gear disk; 10-Gear; 11-First suspension device; 12-Second suspension device; 13-Bracket; 14-Elastic steel plate; 15-Heat storage material; 16-Base frame. Detailed Implementation

[0030] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation of the present invention and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present invention without departing from the scope or spirit of the invention. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present invention encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0031] In the description of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected," "linked," and "set up" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0032] refer to Figure 1As shown, this utility model provides a Fresnel solar thermal utilization system, including: a greenhouse structure, the greenhouse structure including: a translucent roof 1 and translucent sidewalls 2 connected to the periphery of the translucent roof 1. Specifically, the translucent sidewalls 2 are vertically constructed on the ground, forming a cylindrical shape. The translucent roof 1 is located on top of the translucent sidewalls 2 and connected to the top of the translucent sidewalls 2. An indoor space is formed between the translucent roof 1 and the translucent sidewalls 2. The outer surfaces of the translucent roof 1 and the translucent sidewalls 2 are flat and regular, making cleaning and maintenance simpler and the maintenance cost low. Sunlight enters the indoor space through the translucent roof 1 and the translucent sidewalls 2. For example, the translucent roof 1 can be a roof made of a high light transmittance material, such as a transparent roof, specifically a high light transmittance glass. Glass is used to ensure light transmittance. Preferably, the light-transmitting sidewalls 2 around the roof can be divided into four: a first light-transmitting sidewall, a second light-transmitting sidewall, a third light-transmitting sidewall, and a fourth light-transmitting sidewall. The four light-transmitting sidewalls are connected sequentially around the perimeter of the light-transmitting roof 1. The first and third light-transmitting sidewalls are opposite each other, as are the second and fourth light-transmitting sidewalls. The light-transmitting sidewalls can be made of highly transparent materials, such as completely transparent sidewalls, specifically highly transparent glass, highly transparent plastic panels, etc. For example, the first light-transmitting sidewall faces the sun, facing due south, and the second light-transmitting sidewall faces east. Thus, all four light-transmitting sidewalls are made of highly transparent materials, achieving good light penetration and improving solar energy utilization.

[0033] A linear Fresnel solar concentrating thermal utilization device is installed inside the greenhouse structure. The linear Fresnel solar concentrating thermal utilization device includes: a Fresnel lens, a heat collection component, and a tracking mechanism. The Fresnel lens concentrates light and does not have the aging problems of the reflective layer and protective layer, so it can be used for a long time. The heat collection component includes a heat collection tube 3, which is located on the concentrating side of the Fresnel lens. The axis of the heat collection tube 3 is parallel to the light surface of the Fresnel lens, and the heat collection tube 3 is located at the focal point of the Fresnel lens. The light-incident side of the Fresnel lens faces upwards, so it can receive sunlight and concentrate the light on the heat collection tube 3. Specifically, the Fresnel lens is mounted on the tracking mechanism, which drives the Fresnel lens to move and track the sun so that the focal point of the Fresnel lens always falls on the heat collection tube 3. For example, the tracking mechanism can drive the Fresnel lens to move circumferentially around the axis of the heat collection tube 3, tracking the sun as it rotates, ensuring that the light-receiving surface of the Fresnel lens always faces the sun, so that the Fresnel lens can receive sunlight well and concentrate the light onto the heat collection tube 3. Preferably, the focal point of the Fresnel lens can be set to focus on the axis of the heat collection tube 3, so that the light is concentrated at the center of the heat collection tube 3.

[0034] In addition, a light-transmitting isolation layer 4 is provided at the bottom of the greenhouse structure. The light-transmitting isolation layer 4 can be a transparent isolation layer made of a high light transmittance material. For example, the light-transmitting isolation layer 4 can be an isolation layer made of a transparent material, such as high-strength transparent glass or transparent plastic. The periphery of the light-transmitting isolation layer 4 is connected to the light-transmitting sidewall 2 of the greenhouse structure so that the space between the light-transmitting isolation layer 4 and the bottom side of the greenhouse structure forms an air supply channel. Preferably, the periphery of the light-transmitting isolation layer 4 can be sealed to the light-transmitting sidewall 2 of the greenhouse structure. The air supply channel has an air inlet and an air outlet, which are respectively set on the light-transmitting sidewall 2 on opposite sides of the greenhouse structure. The air inlet is connected to the atmospheric environment. A cylindrical ventilation tower 5 is provided on one side of the greenhouse structure. Specifically, the cylindrical ventilation tower 5 is erected on the side of the greenhouse structure with the air outlet. The bottom of the cylindrical ventilation tower 5 is connected to the air outlet of the air supply channel. A wind turbine 6 is provided inside the cylindrical ventilation tower 5. The greenhouse structure serves as insulation, and the light-transmitting isolation layer 4 forms an air supply channel in the space between the bottom and the ground. The light-transmitting isolation layer 4 also serves as insulation, making the air supply channel also a greenhouse. The cylindrical ventilation tower 5 is equivalent to a chimney. Due to the greenhouse effect, the temperature inside the air supply channel is higher than that of the outside environment. The air in the air supply channel flows into the cylindrical ventilation tower 5 through the air outlet and is then discharged upwards through the cylindrical ventilation tower 5. Meanwhile, air from the outside environment is introduced into the air supply channel through the air inlet. As a result, a hot airflow is formed inside the air supply channel and the cylindrical ventilation tower 5, which drives the wind turbine 6 to work and generate electricity. In this way, a hot airflow power generation unit is also formed inside the greenhouse structure, which can enable the system to generate its own power when there is only a heating demand, without the need for external power supply.

[0035] In the aforementioned Fresnel solar thermal utilization system, the linear Fresnel solar concentrating thermal utilization device is installed inside the greenhouse structure. The greenhouse structure forms a protective layer on the outside of the linear Fresnel solar concentrating thermal utilization device, which can prevent dust, debris, and other pollutants from the external environment from falling onto the Fresnel lens, thus maintaining good light transmittance of the Fresnel lens. Furthermore, the greenhouse structure has good light transmittance, which does not affect the Fresnel lens's light concentration, ensuring high solar energy utilization and improving the overall solar energy utilization efficiency of the system. This also helps improve the heat collection efficiency of the linear Fresnel solar concentrating thermal utilization device. In addition, a wind supply channel is set at the bottom of the greenhouse structure, forming a hot airflow power generation system for solar thermal utilization with the cylindrical ventilation tower. This further utilizes solar heat, improving the overall solar energy utilization efficiency of the Fresnel solar thermal utilization system and increasing the system's power generation efficiency. When the system only requires heating, no external power supply is needed. Therefore, this embodiment uses the linear Fresnel solar concentrating device and hot airflow power generation technologies in synergy, making it suitable for projects with both heating and power supply needs, and requiring no external power supply when only heating is needed. Furthermore, the airflow within the air supply duct can carry heat from the greenhouse structure, mitigating the aging of electronic components and instruments within the greenhouse. A light-transmitting insulating layer separates the air supply duct from the upper part of the greenhouse structure, preventing airflow from interfering with the Fresnel lens tracking operation. In addition, the greenhouse structure has a simple frame, is easy to assemble and construct, can be standardized and modularized, and is easy to disassemble and relocate when there is no heat utilization demand. The exterior of the greenhouse structure is easy to clean and maintain, ensuring a clean and hygienic environment, preserving light transmittance, and improving the system's solar energy utilization rate, thereby increasing the system's heat production and power generation efficiency.

[0036] Continue to refer to Figure 1In one possible implementation, the tracking mechanism includes: a frame 7 for mounting the Fresnel lens, an inclinometer 8 mounted on the frame 7, and a drive assembly for driving the frame 7 to move circumferentially around the axis of the heat collection tube 3. The frame 7 supports the Fresnel lens, ensuring that the Fresnel lens does not deform under its own weight. Preferably, the drive assembly includes: an arc-shaped gear disk 9, a gear 10, a power assembly, and a balancing assembly. The arc-shaped gear disk 9 is arched, with external teeth on its convex side facing upwards and its concave side facing the heat collection tube 3. The heat collection tube 3 is located below the arc-shaped gear disk 9, and the positions of the arc-shaped gear disk 9 and the heat collection tube 3 are relatively fixed. The gear 10 is mounted on the arc-shaped gear disk 9, and the external teeth of the gear 10 mesh with the external teeth of the arc-shaped gear disk 9. The frame 7 is... On the convex side of the arc-shaped gear disk 9, the gear 10 is connected to the frame 7 via a gear shaft, and the frame 7 and the gear shaft are rotatably connected. The gear 10 and the gear shaft can be connected by a key. The power component is driven by the gear shaft and can drive the gear shaft to rotate, thereby driving the gear 10 to rotate. For example, the power component may include a motor, which may be fixedly connected to the frame 7. The output shaft of the motor is driven by the gear shaft to drive the gear shaft to rotate. The balancing component is connected to the frame 7 to maintain the plane where the Fresnel lens is located tangent to the outer contour line of the arc-shaped gear disk 9.

[0037] As the sun moves, frame 7 needs to rotate at a certain angle to ensure that the light-receiving surface of the Fresnel lens always faces the sun, achieving better light concentration. Based on the relationship between time and the sun's angle, the motor can be controlled according to the sun's current angle, causing frame 7 to rotate with the Fresnel lens. An inclinometer 8, mounted on frame 7, can detect the angle of the Fresnel lens's light-receiving surface in real time, ensuring that frame 7 rotates to an accurate tilt angle. This allows the Fresnel lens to be accurately aligned with the sun, ensuring tracking accuracy and thus achieving better light concentration and improving solar energy utilization.

[0038] Based on the aforementioned tracking mechanism, in one possible implementation, such as Figure 1 As shown, the aforementioned balancing assembly includes a hoisting assembly, which specifically includes: a first suspension device 11 and a second suspension device 12. The first suspension device 11 and the second suspension device 12 are located on the side of the frame 7 away from the arc-shaped gear disk 9, and the first suspension device 11 and the second suspension device 12 are respectively located opposite each other in the frame 7 and on both sides of the gear shaft circumferentially. Specifically, the first suspension device 11 includes a first traction rope and a first rope retraction device for retracting the first traction rope, and the free end of the first traction rope is connected to the side of the frame 7 near the first suspension device 11. The second suspension device 12 includes a second traction rope and a second rope retraction device for retracting the second traction rope, and the free end of the second traction rope is connected to the side of the frame 7 near the second suspension device 12.

[0039] Preferably, one, two, three, or more first suspension devices 11 can be provided. When two or more first suspension devices 11 are provided, each first suspension device 11 is distributed along the extension direction of the side connected to the frame 7. Similarly, one, two, three, or more second suspension devices 12 can also be provided. More preferably, the number of second suspension devices 12 is the same as that of the first suspension devices 11. In this way, the frame 7 is suspended at multiple positions on opposite sides of the frame 7, which makes the frame 7 more stable.

[0040] For example, refer to Figure 1 As shown, frame 7 can be a rectangular frame with a rectangular border around its outer perimeter. The rectangular border has four sides, namely the first, second, third, and fourth sides connected in sequence. The first and third sides are opposite each other, as are the second and fourth sides. The axis of the gear shaft is parallel to the first and third sides and is mounted on the second and fourth sides, rotatably connected to them. Gear 10 is mounted on the gear shaft and meshes with the arc-shaped gear disk 9. Frame 7 moves circumferentially around the axis of the arc-shaped gear disk 9. The first and second rope winding devices are located above the first and second sides, respectively. Both devices can be fixed to the light-transmitting sidewall 2 of the greenhouse structure. One end of the first traction rope is stored in... The first rope is inside the first rope winding and unwinding device, and the other end forms a free end on the outside. The free end of the first traction rope is connected to the first frame edge of the frame 7. For example, the first traction rope can be a high-strength steel wire, which is strong, firm, stable and reliable. Similarly, one end of the second traction rope is stored in the second rope winding and unwinding device, and the other end forms a free end on the outside. The free end of the second traction rope is connected to the third frame edge of the frame 7. For example, the second traction rope can be a high-strength steel wire, which is strong and firm. In this way, the first traction rope and the second traction rope pull on the first frame edge and the third frame edge on both sides of the frame 7, respectively. By winding and unwinding the first traction rope through the first rope winding and unwinding device, and cooperating with the second rope winding and unwinding device to wind and unwind the second traction rope, the frame 7 can maintain a tangent state with the outer contour of the arc-shaped gear disk 9 when rotating around the arc-shaped gear disk 9.

[0041] Specifically, the first rope winding / unwinding device includes: a first reel and a first motor drivenly connected to the first reel. A first traction rope is wound around the first reel, and the axis of the first reel is parallel to the axis of the gear shaft. The output shaft of the first motor is drivenly connected to the first reel, enabling it to rotate. Specifically, the output shaft of the first motor can rotate clockwise or counterclockwise, driving the first reel to rotate clockwise or counterclockwise, thereby enabling the first rope to be wound or unwound on the first reel. The first rope winding / unwinding device achieves the winding or unwinding of the first rope. The second rope winding / unwinding device can be connected to the first... The rope winding and unwinding device has the same structural configuration. The second rope winding and unwinding device includes a second reel and a second motor connected to the second reel. The second traction rope is wound on the second reel, and the axis of the second reel is parallel to the axis of the first reel. The output shaft of the second motor is connected to the second reel, driving it to rotate. Specifically, the output shaft of the second motor can rotate clockwise or counterclockwise, driving the second reel to rotate clockwise or counterclockwise, thereby enabling the second rope to be wound or unwound on the second reel. The second rope winding and unwinding device achieves the winding or unwinding of the second rope. The first motor and the second motor work together to achieve the pulling of the first and second ropes on the frame 7. The structure is simple and easy to adjust, allowing for flexible adjustment of the frame 7's state.

[0042] In one possible implementation, the aforementioned Fresnel solar thermal utilization system further includes a control device. The inclinometer, power assembly, and the first and second motors are all signal-connected to the control device. The control device includes a control module that stores a preset control program. Specifically, the inclinometer, power assembly, and the first and second motors are all signal-connected to the control module. The control module performs calculations and controls according to the preset program, providing corresponding control over the inclinometer, power assembly, and the first and second motors, enabling the components to work together and achieving automatic operation of the tracking mechanism.

[0043] For the installation of the heat collection tubes, please refer to... Figure 1 As shown, the heat collection assembly also includes a base frame assembly located on the focusing side of the Fresnel lens and used to support the heat collection tube 3. The base frame assembly includes a base frame 16, a bracket 13, and an elastic steel plate 14. The heat collection tube 3 is mounted on the bracket 13, and the bracket 13 supports the heat collection tube 3. Preferably, multiple brackets 13 can be arranged at intervals and connected to the heat collection tube 3 in the extension direction of the axis of the heat collection tube 3 to support the heat collection tube 3. Each heat collection tube 3 is connected to the elastic steel plate 14, and each bracket 13 is connected to the base frame 16 through the elastic steel plate 14. The elastic steel plate 14 can elastically deform along the extension direction of the axis of the heat collection tube 3. When the heat collection tube 3 thermally expands and extends in the extension direction of its own axis, the elastic steel plate 14 can deform along the extension direction of the heat collection tube 3 with the expansion of the heat collection tube, counteracting the expansion of the heat collection tube, so that the heat collection tube can be stably supported on the base frame.

[0044] On the other hand, such as Figure 1 As shown, in the Fresnel solar thermal utilization system described above, a heat storage material 15 is installed inside the air supply channel. The heat storage material 15 is installed inside the air supply channel, absorbing and storing heat during the day and releasing heat at night, maintaining the temperature inside the air supply channel higher than the outside temperature, so that the hot airflow is continuous, and continuous power generation is achieved.

[0045] Specifically, the aforementioned hot airflow power generation unit is also equipped with a storage battery. The wind turbine is connected to the storage battery, which can store electrical energy and supply power when the system needs power, or supply power to external systems when there is sufficient power.

[0046] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A Fresnel solar thermal utilization system, characterized in that, include: A greenhouse structure, comprising: a translucent roof and translucent sidewalls connected to the periphery of the translucent roof, wherein an interior space is formed between the translucent roof and the translucent sidewalls; The indoor space is equipped with a linear Fresnel solar thermal concentrator, which includes a Fresnel lens, a heat collection assembly, and a tracking mechanism. The heat collection assembly includes a heat collection tube located on the concentrating side of the Fresnel lens. The Fresnel lens is mounted on the tracking mechanism, which drives the Fresnel lens to track the sun so that the focal point of the Fresnel lens always falls on the heat collection tube. A light-transmitting isolation layer is provided at the bottom of the greenhouse structure. The periphery of the light-transmitting isolation layer is connected to the light-transmitting sidewall of the greenhouse structure, so that the space between the light-transmitting isolation layer and the bottom side of the greenhouse structure forms an air supply channel. The air supply channel has an air inlet and an air outlet, and the air inlet is connected to the atmospheric environment. A cylindrical ventilation tower is provided on one side of the greenhouse structure, and the bottom of the cylindrical ventilation tower is connected to the air outlet of the air supply channel; a wind turbine is installed inside the cylindrical ventilation tower.

2. The Fresnel solar thermal utilization system according to claim 1, characterized in that, The tracking mechanism includes: a frame for mounting the Fresnel lens, an inclinometer mounted on the frame, and a drive assembly for driving the frame to move circumferentially about the axis of the heat collection tube.

3. The Fresnel solar thermal utilization system according to claim 2, characterized in that, The driving component includes: An arc-shaped gear disk has external teeth on its convex side and its concave side facing the heat collection tube, and the position of the arc-shaped gear disk and the heat collection tube is relatively fixed. The gear has external teeth that mesh with the external teeth of the arc-shaped gear disk. The frame is located on the protruding side of the arc-shaped gear disk, and the gear is connected to the frame via a gear shaft. A power assembly, which is connected to the gear shaft for driving the gear to rotate; A balancing component, connected to the frame, is used to maintain the plane containing the Fresnel lens tangent to the outer contour of the arc-shaped gear disk.

4. The Fresnel solar thermal utilization system according to claim 3, characterized in that, The balancing assembly includes a hoisting assembly, which includes a first suspension device and a second suspension device. The first suspension device and the second suspension device are located on the side of the frame away from the arc-shaped gear disk, and the first suspension device and the second suspension device are respectively located opposite each other in the frame and on both sides of the gear shaft circumferentially. The first suspension device includes a first traction rope and a first rope retraction device for retracting and extending the first traction rope, wherein the free end of the first traction rope is connected to the side of the frame near the first suspension device. The second suspension device includes a second traction rope and a second rope retraction device for retracting and extending the second traction rope, wherein the free end of the second traction rope is connected to the side of the frame near the second suspension device.

5. The Fresnel solar thermal utilization system according to claim 4, characterized in that, The first rope winding and unwinding device includes: a first reel and a first motor that is pulsatingly connected to the first reel; the first traction rope is wound on the first reel; and the axis of the first reel is parallel to the axis of the gear shaft. The second rope winding device includes a second reel and a second motor that is motive-connected to the second reel. The second traction rope is wound on the second reel, and the axis of the second reel is parallel to the axis of the first reel.

6. The Fresnel solar thermal utilization system according to claim 5, characterized in that, It also includes a control device, and the inclinometer, the power assembly, the first motor and the second motor are all signal-connected to the control device.

7. The Fresnel solar thermal utilization system according to claim 3, characterized in that, The power unit includes an electric motor.

8. The Fresnel solar thermal utilization system according to claim 1, characterized in that, The heat collection assembly also includes a base frame assembly located on the focusing side of the Fresnel lens and used to support the heat collection tube. The base frame assembly includes a base frame, a support, and an elastic steel plate. The heat collection tube is mounted on the support, and the support is mounted on the base frame via the elastic steel plate. The elastic steel plate can elastically deform along the extension direction of the centerline of the heat collection tube.

9. The Fresnel solar thermal utilization system according to any one of claims 1-8, characterized in that, The air supply channel is equipped with heat storage material.

10. The Fresnel solar thermal utilization system according to claim 1, characterized in that, The wind turbine is connected to a battery.

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