Photo-thermal system and control method thereof

Abstract

The invention discloses a photo-thermal system and a control method thereof. The photo-thermal system comprises a support assembly, a photovoltaic power generation assembly, a water storage tank, a plurality of heat collectors, a driving mechanism and a light sensation sun tracking controller. The driving mechanism is in driving connection with the heat collector and / or the support assembly, and a heat collecting pipe of the heat collector is connected with the water storage tank. The light sensation sun tracking controller is used for tracking the sun in real time to determine the sunlight illumination angle and controlling the driving mechanism to drive the heat collector to move to the position where the heat collecting face faces the sunlight illumination direction. The invention provides a skid-mounted portable photo-thermal electricity storage integrated self-operated solar energy supply scheme, a photo-thermal system can still provide a high-temperature heat transfer working medium under the low-temperature environment condition in winter, the heat transfer working medium can be self-circulated, electric power can be self-supplied, and the reliability is high; in addition, the photo-thermal system is convenient to disassemble and assemble and suitable for supplying domestic hot water, heating, process hot oil and the like in the field and in the energy island environment and meeting the heat and energy consumption requirements of areas without energy supply.

Description

Technical Field

[0001] The present invention relates to the field of solar energy technology, and in particular to a photothermal system and a control method thereof. Background Art

[0002] The existing solar thermal system includes a bracket and photovoltaic panels, a heat collecting device and a water tank installed on the bracket. The photovoltaic panels convert the collected solar energy into electrical energy and supply power to the heat collecting device and the water tank connected thereto. The heat collecting device is connected to the water tank to heat the water in the water tank.

[0003] However, after the installation of this solar thermal system, the positions of the bracket and the various devices thereon are fixed, so that the orientation of the heat collecting device is also fixed. When the heat collecting part of the heat collecting device is facing away from the sunlight, the heat collecting effect will be greatly reduced, the water temperature will rise very slowly, and users will not be able to use hot water in time. Summary of the invention

[0004] The main purpose of the present invention is to provide a photothermal system and a control method thereof, aiming to improve the heat collection effect of the photothermal system, so as to improve energy utilization and enable users to use hot water in a timely manner.

[0005] To achieve the above-mentioned purpose, the present invention proposes a photothermal system, comprising a support assembly, a photovoltaic power generation assembly, a water storage tank, a plurality of heat collectors, a driving mechanism and a light-sensing sun tracking controller, wherein the photovoltaic power generation assembly, the plurality of heat collectors, the driving mechanism and the light-sensing sun tracking controller are respectively arranged on the support assembly;

[0006] The photovoltaic power generation assembly is electrically connected to the heat collector and the light-sensing sun tracking controller respectively, the light-sensing sun tracking controller is electrically connected to the driving mechanism, the heat collector and / or the bracket assembly is drivingly connected to the driving mechanism, the heat collector includes a heat collecting body formed with a heat collecting surface and at least one heat collecting tube arranged on the heat collecting surface of the heat collecting body, and the heat collecting tube is connected to the water storage tank;

[0007] The light-sensing sun tracking controller is used to track the sun in real time to determine the sunlight angle, and to control the driving mechanism to drive the collector and / or the bracket assembly to a position where the collecting surface faces the sunlight direction according to the sunlight angle.

[0008] Optionally, the driving mechanism includes a motor and a transmission component connection, the collector is mounted on the bracket assembly through a mounting frame, and the mounting frame can move in at least one direction, and the output end of the motor is connected to the mounting frame through the transmission component.

[0009] Optionally, the heat collecting surface is an arc-shaped concave surface; and / or the heat collecting surface is coated with a light-gathering material layer for enhancing light-gathering capability.

[0010] Optionally, the solar thermal system also includes a battery and an electronic control system, the photovoltaic power generation component is electrically connected to the input end of the battery, the output end of the battery is electrically connected to the electronic control system, and the electronic control system is electrically connected to the light-sensing sun tracking controller.

[0011] Optionally, the photovoltaic power generation component, the battery, the water tank, the plurality of collectors, the driving mechanism, the light-sensing sun tracking controller and the electronic control system are respectively detachably mounted on the bracket assembly, and the bracket assembly is an integral structure or a detachable structure.

[0012] Optionally, the photothermal system further comprises an electric heating device, which is disposed in the water storage tank and electrically connected to the electric control system, and is used to heat the working medium in the water storage tank.

[0013] Optionally, the photothermal system further comprises a temperature sensor, wherein the temperature sensor is disposed in the water tank and is used to detect water temperature, and the temperature sensor is electrically connected to the electric heating device and / or the photothermal tracking controller.

[0014] Optionally, the photovoltaic power generation component is tiltedly arranged on the support component; and / or the water tank is fixed between the photovoltaic power generation component and the top of the support component.

[0015] To achieve the above object, the present invention further provides a control method for a photothermal system, the control method comprising the following steps:

[0016] Detect the water temperature in the water tank and generate the current water temperature value to determine the current time;

[0017] Determine the target water temperature range for the current time according to a preset water temperature and time mapping relationship table;

[0018] The light sensing sun tracking controller is controlled to operate according to whether the current water temperature value is within the target water temperature range.

[0019] Optionally, the step of controlling the operation of the light-sensing sun tracking controller according to whether the current water temperature value is within the target water temperature range specifically includes:

[0020] When the current water temperature value is lower than the lower limit of the target water temperature range and the current time is the local daytime, controlling the light-sensing sun tracking controller to start the sunlight tracking mode;

[0021] When the current water temperature value is higher than the upper limit value of the target water temperature range, the light-sensing sun tracking controller is controlled to stop working.

[0022] In the technical solution of the present invention, the solar thermal system includes a bracket assembly, a photovoltaic power generation assembly, a water storage tank, a plurality of collectors, a driving mechanism and a light-sensing sun-tracking controller. The photovoltaic power generation assembly, the plurality of collectors, the driving mechanism and the light-sensing sun-tracking controller are respectively arranged on the bracket assembly; the photovoltaic power generation assembly is electrically connected to the collector and the light-sensing sun-tracking controller respectively, the light-sensing sun-tracking controller is electrically connected to the driving mechanism, the collector and / or the bracket assembly is drivingly connected to the driving mechanism, the collector includes a collector body formed with a collector surface and at least one collector tube arranged on the collector surface of the collector body, and the collector tube is connected to the water storage tank; the light-sensing sun-tracking controller is used for real-time tracking of the sun to determine the angle of sunlight, and is used to control the driving mechanism to drive the collector to move to a position where the collector surface faces the direction of sunlight according to the angle of sunlight. It can be understood that the solar thermal system of the present invention performs real-time sun tracking by arranging a light-sensing sun-tracking controller on the bracket assembly, and then controls the driving mechanism to drive the collector to move, and makes the collecting surface of the collector face the direction of sunlight to collect as much heat energy as possible, thereby improving the heat collection effect of the solar thermal system, thereby improving energy utilization and allowing users to use hot water in a timely manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 It is a structural schematic diagram of an embodiment of a photothermal system of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of a water storage tank, a heat collector and a driving mechanism in an embodiment of a photothermal system of the present invention;

[0026] Figure 3 A schematic diagram of a flow chart of an embodiment of a control method for a photothermal system of the present invention;

[0027] Figure 4 This is a detailed flow chart of an embodiment of a control method for a photothermal system of the present invention.

[0028] Description of Figure Numbers:

[0029] 10. Bracket assembly; 20. Photovoltaic power generation assembly; 30. Water storage tank; 40. Collector; 50. Driving mechanism; 60. Photosensitive sun tracking controller; 70. Battery and electronic control system; 41. Collector body; 42. Collector tube; 401. Collector surface.

[0030] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0035] The present invention provides a photothermal system.

[0036] Reference Figure 1 and Figure 2In one embodiment of the present invention, the solar thermal system includes a support assembly 10, a photovoltaic power generation assembly 20, a water storage tank 30, a plurality of collectors 40, a driving mechanism 50 and a light-sensing sun tracking controller 60. The photovoltaic power generation assembly 20, the plurality of collectors 40, the driving mechanism 50 and the light-sensing sun tracking controller 60 are respectively arranged on the support assembly 10; the photovoltaic power generation assembly 20 is electrically connected to the collector 40 and the light-sensing sun tracking controller 60, respectively, the light-sensing sun tracking controller 60 is electrically connected to the driving mechanism 50, and the collector 40 and / or the bracket assembly 10 are driven and connected to the driving mechanism 50, the collector 40 includes a collector body 41 with a collector surface 401 and at least one collector tube 42 arranged on the collector surface 401 of the collector body 41, and the collector tube 42 is connected to the water tank 30; the light-sensing sun tracking controller 60 is used for real-time tracking of the sun to determine the sunlight angle, and is used to control the driving mechanism 50 to drive the collector 40 to move to a position where the collector surface 401 faces the sunlight direction according to the sunlight angle.

[0037] In order to store electrical energy and utilize it rationally, the solar thermal system of this embodiment may also include a battery and an electronic control system 70 . The photovoltaic power generation component 20 is electrically connected to the input end of the battery, the output end of the battery is electrically connected to the electronic control system, and the electronic control system is electrically connected to the photosensitive sun tracking controller 60 .

[0038] In this embodiment, the bracket assembly 10 can adopt an integral structure or a detachable structure, preferably a detachable structure for easy disassembly and assembly. In addition, the photovoltaic power generation assembly 20, water storage tank 30, a plurality of collectors 40, a driving mechanism 50, a light-sensing sun tracking controller 60, a battery and an electronic control system 70 of this embodiment can be configured to be detachably mounted on the bracket assembly 10. When the transportation space permits, the entire assembly can be skidded and transported to the next location of use; when the transportation space is tight, the assembly can be disassembled for transportation, and quickly and easily assembled on site after arriving at the location of use. It is very suitable for the supply of domestic hot water, heating, process hot oil, etc. in the wild and energy island environments, as well as the heat and energy needs in areas without energy supply.

[0039] In this embodiment, in order to improve the power generation efficiency of the photovoltaic power generation assembly 20, the photovoltaic power generation assembly 20 can be tilted on the bracket assembly 10. Specifically, the tilt angle can be 30°, which is not limited here. In order to reduce the overall volume and improve the structural compactness of the solar thermal system, the photovoltaic power generation assembly 20 can be mounted on the top of the bracket assembly 10, and the water storage tank 30 can be fixed between the photovoltaic power generation assembly 20 and the bracket assembly 10.

[0040] In this embodiment, the driving mechanism 50 can be driven by a motor, a cylinder, a hydraulic cylinder, etc., which is not limited here.

[0041] It can be understood that the solar thermal system of the present invention performs real-time sun tracking by setting a light-sensing sun-tracking controller 60 on the bracket assembly 10, and then controls the driving mechanism 50 to drive the collector 40 to move, and makes the collecting surface 401 of the collector 40 face the direction of sunlight to collect as much heat energy as possible, thereby improving the heat collection effect of the solar thermal system, thereby improving energy utilization, and allowing users to use hot water in a timely manner.

[0042] Reference Figure 1 and Figure 2 In one embodiment, the driving mechanism 50 may include a motor and a transmission component connection, the collector 40 is mounted on the bracket assembly 10 through a mounting frame, and the mounting frame can move in at least one direction, and the output end of the motor is connected to the mounting frame through a transmission component. Among them, the transmission component can be a push rod or a connecting rod assembly, etc., which is not limited here.

[0043] In this embodiment, the heat collection surface 401 is configured as an arc-shaped concave surface, which helps to further improve the heat collection effect. Furthermore, a light-collecting material layer for enhancing the light-collecting ability can be coated on the heat collection surface 401 to obtain a better heat collection effect.

[0044] To ensure that users can enjoy hot water in a timely manner and further improve energy utilization, in one embodiment, the solar thermal system may also include an electric heating device, which is disposed in the water tank 30 and is electrically connected to the electronic control system. The electric heating device is used to heat the working fluid in the water tank 30.

[0045] In this embodiment, the photothermal system may also include a temperature sensor, which is disposed in the water tank 30 and is used to detect the water temperature. The temperature sensor is electrically connected to the electric heating device and / or the light-sensing sun-tracking controller 60. With such a configuration, the water temperature in the water tank 30 can be detected in real time, and can be fed back to the control system, which controls the operation of the electric heating device to achieve rapid heating. During the day, the light-sensing sun-tracking controller 60 can work at the same time, controlling the drive mechanism 50 to drive the collector 40 to adjust to a position where its heat collecting surface 401 faces the direction of sunlight. The two heating methods work together to greatly improve the heating efficiency.

[0046] In summary, the present invention provides a skid-mounted portable integrated solar thermal power storage self-powered solar energy supply solution. This solar thermal system is mainly composed of a bracket assembly 10, a concentrating trough collector 40, a photovoltaic power generation assembly 20, a water tank 30, a photosensitive sun tracking controller 60, a battery and an electronic control system 70. The system combines the photosensitive sun tracking controller 60 with the concentrating solar trough collector 40, and uses a fixed-angle photovoltaic power generation assembly 20 of a certain area installed in the upper space of the water tank 30 to provide the required electrical energy for the entire system. During the day, the drive mechanism 50 can be controlled to drive the collector 40 to move and track the sun in real time. The extra electrical energy can be stored in the battery for use when the entire system loses power. This ensures that the entire system can still provide a relatively high temperature heat transfer medium under low temperature conditions in winter. In addition, this solar thermal system adds an electric heating device to the water tank 30, which uses photovoltaic power generation or battery power to heat when needed, further improving the stability of the system's hot water supply.

[0047] The photothermal system of the present invention can realize self-circulation of heat transfer medium, self-supply of electricity, and complete related protection interlocking control logic. According to different user requirements, the bracket assembly 10 and each device in the system can be designed as an integral or detachable structure. When the transportation space allows, it can be skidded and transported to the next place of use as a whole; when the transportation space is tight, it can be disassembled for transportation, and quickly and easily assembled on site after arriving at the place of use. It is very suitable for the supply of domestic hot water, heating, process hot oil, etc. in the wild and energy island environments, as well as the heat and energy needs in areas without energy supply.

[0048] The present invention also provides a control method for a photothermal system, referring to Figures 1 to 3 The solar thermal system may be based on one or more of the above embodiments, and the control method includes the following steps:

[0049] S10, detecting the water temperature in the water storage tank 30 and generating a current water temperature value, and determining the current time;

[0050] S20, determining the target water temperature range for the current time according to the preset water temperature and time mapping relationship table;

[0051] S30, controlling the light sensing sun tracking controller 60 to operate according to whether the current water temperature value is within the target water temperature range.

[0052] In this embodiment, the temperature sensor of the photothermal system detects the water temperature in the water tank 30 in real time and feeds back the temperature signal to the control system; the control system compares the temperature signal and the current time with the system preset water temperature and time mapping relationship table to determine whether the water temperature value at the current time is within the target water temperature range; when the water temperature value is lower than the lower limit of the target water temperature range, the electric heating device can be controlled to work to quickly increase the water temperature to the target value; when the water temperature value is within the target water temperature range, the electric heating device can be controlled to stop working or turn on the insulation mode to ensure that the water temperature is always within the target temperature range; when the water temperature value is higher than the lower limit of the target water temperature range, the electric heating device can be controlled to stop working to allow the water temperature to naturally cool to the target value.

[0053] In addition, it should be noted that the solar thermal system can also be connected to the indoor control device by wired and / or wireless means. The control device can be a tablet, mobile phone, computer, control panel or remote control, etc., so that the user can set the target water temperature and control the working status of other devices. It is worth noting that when the solar thermal system obtains user instructions, the operating status of each device is switched from the default control mode to the control instructions issued by the user. In other words, the priority of the user control instruction should be higher than the system default operation instruction.

[0054] Based on the above embodiment, further, referring to Figures 1 to 4 According to whether the current water temperature is within the target water temperature range, step S30 of controlling the light sensing sun tracking controller 60 to work may specifically include:

[0055] S31, when the current water temperature is lower than the lower limit of the target water temperature range and the current time is the local daytime, controlling the light sensing sun tracking controller 60 to start the sunlight tracking mode;

[0056] S32: When the current water temperature is higher than the upper limit of the target water temperature range, the light sensing sun tracking controller 60 is controlled to stop working.

[0057] During the day, the solar thermal system can control whether the light-sensing sun-tracking controller 60 works or not according to the real-time detected water temperature value. Specifically, when the current water temperature value is lower than the lower limit of the target water temperature range, the sunlight tracking mode of the light-sensing sun-tracking controller 60 is turned on; when the current water temperature value is higher than the upper limit of the target water temperature range, the light-sensing sun-tracking controller 60 can be controlled to stop working. The advantage of doing this is that it not only achieves the regulation of water temperature, but also allows the light-sensing sun-tracking controller 60 and the driving mechanism 50 to not work continuously, and only turn on when needed, thereby saving electricity and being more energy-saving and environmentally friendly.

[0058] At night, there is no need to start the light-sensing sun tracking controller 60 and the driving mechanism 50 and other related tracking devices, so as to further save electric energy.

[0059] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A photothermal system, characterized in that: It includes a bracket assembly, a photovoltaic power generation assembly, a water storage tank, a plurality of heat collectors, a driving mechanism and a light-sensing sun-tracking controller, wherein the photovoltaic power generation assembly, the plurality of heat collectors, the driving mechanism and the light-sensing sun-tracking controller are respectively arranged on the bracket assembly; The photovoltaic power generation assembly is electrically connected to the heat collector and the light-sensing sun tracking controller respectively, the light-sensing sun tracking controller is electrically connected to the driving mechanism, the heat collector and / or the bracket assembly is drivingly connected to the driving mechanism, the heat collector includes a heat collecting body formed with a heat collecting surface and at least one heat collecting tube arranged on the heat collecting surface of the heat collecting body, and the heat collecting tube is connected to the water storage tank; The light-sensing sun tracking controller is used to track the sun in real time to determine the sunlight angle, and to control the driving mechanism to drive the collector and / or the bracket assembly to a position where the collecting surface faces the sunlight direction according to the sunlight angle.

2. The photothermal system according to claim 1, characterized in that: The driving mechanism includes a motor and a transmission component connection. The collector is mounted on the bracket assembly through a mounting frame, and the mounting frame can move in at least one direction. The output end of the motor is connected to the mounting frame through the transmission component.

3. The photothermal system according to claim 1, characterized in that: The heat collecting surface is an arc-shaped concave surface; and / or the heat collecting surface is coated with a light-collecting material layer for enhancing light-collecting capability.

4. The photothermal system according to claim 1, characterized in that: The photothermal system also includes a battery and an electronic control system. The photovoltaic power generation component is electrically connected to the input end of the battery, the output end of the battery is electrically connected to the electronic control system, and the electronic control system is electrically connected to the light-sensing sun tracking controller.

5. The photothermal system according to claim 4, characterized in that: The photovoltaic power generation component, the battery, the water tank, the plurality of collectors, the driving mechanism, the light-sensing sun tracking controller and the electronic control system are respectively detachably mounted on the bracket assembly, and the bracket assembly is an integral structure or a detachable structure.

6. The photothermal system according to claim 4, characterized in that: The photothermal system also includes an electric heating device, which is disposed in the water storage tank and electrically connected to the electric control system, and is used to heat the working medium in the water storage tank.

7. The photothermal system according to claim 6, characterized in that: The photothermal system also includes a temperature sensor, which is arranged in the water tank and is used to detect the water temperature. The temperature sensor is electrically connected to the electric heating device and / or the photosensitive sun tracking controller.

8. The photothermal system according to claim 1, characterized in that: The photovoltaic power generation component is tiltedly arranged on the support component; and / or the water storage tank is fixed between the photovoltaic power generation component and the top of the support component.

9. A control method for a photothermal system, characterized in that: The control method comprises the following steps: Detect the water temperature in the water tank and generate the current water temperature value to determine the current time; Determine the target water temperature range for the current time according to a preset water temperature and time mapping relationship table; The light sensing sun tracking controller is controlled to operate according to whether the current water temperature value is within the target water temperature range.

10. The control method of the photothermal system according to claim 9, characterized in that: The step of controlling the operation of the light-sensing sun tracking controller according to whether the current water temperature value is within the target water temperature range specifically includes: When the current water temperature value is lower than the lower limit of the target water temperature range and the current time is the local daytime, controlling the light-sensing sun tracking controller to start the sunlight tracking mode; When the current water temperature value is higher than the upper limit value of the target water temperature range, the light-sensing sun tracking controller is controlled to stop working.

Images