Separation type light heat storage system suitable for high-cold region

Abstract

The utility model belongs to new energy technology field discloses a kind of separated light heat storage system suitable for alpine region, comprising: photovoltaic power generation unit;Energy storage unit is electrically connected with photovoltaic power generation unit by cable;Light heat collection unit, light heat collection unit includes collector and the circulating pump for the power of collector;Control system;Circulating pump is electrically connected with the output end of energy storage unit by cable;Control system includes controller and the environmental sensor group electrically connected with controller, and environmental sensor group at least includes wind speed sensor and temperature sensor;The utility model is physically separated by photovoltaic power generation unit, energy storage unit and light heat collection unit, independently installed on respective ground support.This layout makes each unit can be best deployed according to own function requirement, avoids mutual interference, structure is independent, greatly improves the layout flexibility and environmental adaptability of system under complex terrain and severe weather conditions in alpine region.

Description

Technical Field

[0001] This utility model relates to the field of new energy technology, and in particular to a split solar thermal energy storage system suitable for high-altitude and cold regions. Background Technology

[0002] In high-altitude and frigid regions, such as the Qinghai-Tibet Plateau and the frigid northwest of my country, traditional energy supply systems face severe challenges. Extreme low temperatures can significantly reduce the efficiency of photovoltaic power generation, drastically degrade or even damage battery performance, and cause the heat collection medium in conventional solar thermal systems to freeze easily, posing a risk of pipeline freezing and cracking. Existing energy systems are mostly single-function designs or simple combinations, lacking the ability to operate collaboratively and intelligently in high-altitude and frigid environments.

[0003] Furthermore, common applications in high-altitude and cold regions, such as oil and gas well sites, not only require electricity but also anti-condensation heating for production facilities (such as oil storage tanks). Existing systems often rely on additional gas or electric heating equipment, resulting in poor economic and environmental performance. Therefore, there is an urgent need for a separate system that can adapt to high-altitude and cold environments, comprehensively utilize solar energy, possess high reliability, and achieve combined power and heat supply. Utility Model Content

[0004] The main purpose of this utility model is to provide a split solar thermal energy storage system suitable for high-altitude and cold regions, aiming to solve the technical problem that existing energy systems are mostly single-function designs or simple combinations, lacking the ability to operate collaboratively and intelligently in high-altitude and cold environments.

[0005] To achieve the aforementioned objectives, the first aspect of this utility model proposes a split-type solar thermal energy storage system suitable for high-altitude and cold regions, comprising: Photovoltaic power generation unit; The energy storage unit is electrically connected to the photovoltaic power generation unit via a cable; A solar thermal collector unit, comprising a collector and a circulating pump that provides power to the collector; Control system; The circulating pump is electrically connected to the output terminal of the energy storage unit via the cable; The control system includes a controller and an environmental sensor group electrically connected to the controller, the environmental sensor group including at least a wind speed sensor and a temperature sensor; The controller is electrically connected to the drive mechanism of the solar thermal collector and the battery management system of the energy storage unit.

[0006] Furthermore, the solar thermal collector unit is a trough solar collector, its heat collection medium is antifreeze heat transfer oil, and the heat collection tube of the collector is a vacuum heat collection tube structure composed of a metal heat absorption tube and a glass outer tube.

[0007] Furthermore, the drive mechanism includes a motor and a reducer electrically connected to the controller, the motor driving the solar collector to rotate about its axis via the reducer.

[0008] Furthermore, the energy storage unit includes a battery box and a heating device disposed within the battery box, the heating device being electrically connected to the battery management system.

[0009] Furthermore, the system also includes an emergency mains power interface, which is electrically connected to the power supply circuit of the circulating pump via a switch.

[0010] Furthermore, the environmental sensor group also includes a pressure sensor disposed on the solar collector.

[0011] Furthermore, the control system also includes a human-machine interface and a 4G communication module, both of which are electrically connected to the controller.

[0012] Furthermore, the photovoltaic power generation unit, energy storage unit, and solar thermal collector unit are independently and fixedly installed on the ground support.

[0013] Furthermore, the system is applied to oil and gas well sites, where the photovoltaic power generation unit and energy storage unit supply power to the pumping unit, and the solar thermal collector unit is connected to the oil storage tank through a heat exchanger.

[0014] Furthermore, the metal heat-absorbing tube is made of 304 stainless steel, and the glass outer tube is made of borosilicate glass.

[0015] Beneficial effects: 1. This utility model discloses a split photovoltaic-thermal storage system suitable for high-altitude and cold regions. The photovoltaic power generation unit, energy storage unit, and photovoltaic thermal collector unit are physically separated and independently installed on their respective ground supports. This layout allows each unit to be optimally deployed according to its own functional requirements, avoiding mutual interference. The independent structure greatly enhances the system's layout flexibility and environmental adaptability in complex terrain and harsh climate conditions in high-altitude and cold regions.

[0016] 2. This utility model presents a separate photovoltaic thermal energy storage system suitable for high-altitude and cold regions. The separate structure lays the foundation for independent control and fault isolation of each unit. The control system can independently manage the tracking, start-up and shutdown of the photovoltaic thermal unit and the charging, discharging and heating of the energy storage unit based on feedback from the environmental sensor group. This avoids the risk of a single fault causing the entire system to fail in traditional integrated systems, and significantly improves the system's fault tolerance and reliability.

[0017] 3. This utility model's split-type solar thermal energy storage system, suitable for high-altitude and cold regions, utilizes an environmental sensor group including wind speed and temperature sensors, linked with a controller. This allows the system to perceive harsh environmental conditions in high-altitude and cold regions in real time. The controller can promptly adjust the operating status of the solar thermal collector unit (e.g., by retracting or adjusting the collector via a drive mechanism) and manage the operating mode of the energy storage unit, greatly improving the system's survivability and operational reliability in extreme environments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a split-type solar thermal energy storage system suitable for high-altitude and cold regions according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the collector structure of a split-type solar thermal energy storage system suitable for high-altitude and cold regions according to an embodiment of this utility model; Figure 3 This is an embodiment of a split-type solar thermal energy storage system suitable for high-altitude and cold regions. Figure 2 A schematic diagram of a partial cross-section viewed from the front.

[0019] in: 1. Photovoltaic power generation unit; 2. Energy storage unit; 21. Battery box; 22. Heating device; 3. Photothermal heat collection unit; 31. Heat collector; 311. Heat collection tube; 3111. Metal heat absorption tube; 3112. Glass outer tube; 32. Circulation pump; 33. Drive mechanism; 331. Motor; 332. Reducer; 4. Control system; 41. Controller; 42. Environmental sensor group; 421. Wind speed sensor; 422. Temperature sensor; 423. Pressure sensor; 43. Human-machine interface; 44. 4G communication module; 5. Emergency mains power interface; 51. Switch; 6. Oil pumping unit; 7. Heat exchanger; 8. Oil storage tank.

[0020] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0022] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," 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. They do not 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. 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, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly and specifically defined.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] Reference Figures 1-3 An embodiment of this utility model provides a split-type solar thermal energy storage system suitable for high-altitude and cold regions, comprising: Photovoltaic power generation unit 1; Energy storage unit 2 is electrically connected to photovoltaic power generation unit 1 via a cable; The solar thermal collector unit 3 includes a collector 31 and a circulating pump 32 that provides power to the collector 31. Control system 4; The circulating pump 32 is electrically connected to the output end of the energy storage unit 2 via the cable; The control system 4 includes a controller 41 and an environmental sensor group 42 electrically connected to the controller 41. The environmental sensor group 42 includes at least a wind speed sensor 421 and a temperature sensor 422. The controller 41 is electrically connected to the drive mechanism 33 of the solar thermal collector unit 3 and the battery management system of the energy storage unit 2.

[0026] In this embodiment, the photovoltaic power generation unit 1 includes multiple photovoltaic modules, which are fixedly installed on the ground by brackets. A tilted arrangement is preferred to adapt to the local latitude and low-angle sunlight in winter, improving power generation efficiency. The photovoltaic power generation unit 1 is electrically connected to the energy storage unit 2 via cables, storing the generated electrical energy in the energy storage unit 2. The energy storage unit 2 includes a battery pack and a battery management system. The battery pack is preferably a lithium-ion battery or a lithium iron phosphate battery, which has good low-temperature performance. The battery management system monitors the battery's charge / discharge status, temperature, and health status, and is electrically connected to the circulation pump 32 of the photovoltaic power generation unit 1 and the solar thermal collector unit 3 via cables, achieving reasonable distribution and output of electrical energy. The solar thermal collector unit 3 includes a collector 31 and a circulation pump 32. The collector 31 is preferably a trough-type solar collector, which is fixedly installed by brackets and its angle can be adjusted by a drive mechanism 33 to track the sun's position. The circulation pump 32 is used to circulate the heat collection medium in the system. It is electrically connected to the output end of the energy storage unit 2 via cables and is powered by the energy storage unit 2.

[0027] The control system 4 includes a controller 41 and an environmental sensor group 42. The controller 41 can be a PLC or a microcontroller, and is electrically connected to the drive mechanism 33 of the solar thermal collector unit 3 and the battery management system of the energy storage unit 2, respectively. The environmental sensor group 42 includes at least a wind speed sensor 421 and a temperature sensor 422, which are respectively installed near the collector 31 and at key parts of the system to monitor the ambient wind speed and temperature in real time. Based on the data collected by the environmental sensor group 42, the controller 41 determines whether to start or adjust the working state of the solar thermal collector unit 3. For example, when the temperature is lower than a set threshold or the wind speed is too high, the controller 41 can control the drive mechanism 33 to adjust the angle of the collector 31 or suspend the heat collection operation to protect the system safety.

[0028] Furthermore, the solar thermal collector unit 3 is a trough-type solar collector, and its heat collection medium is antifreeze heat transfer oil, which can maintain fluidity at extremely low temperatures and avoid freezing. The heat collection tube 311 of the collector 31 adopts a vacuum heat collection tube structure composed of a metal heat absorption tube 3111 and a glass outer tube 3112, which effectively reduces heat loss and improves heat collection efficiency.

[0029] Optionally, the solar thermal collector unit 3 is a trough solar collector, and its heat collection medium is antifreeze heat transfer oil. The heat collection tube 311 of the collector 31 is a vacuum heat collection tube structure composed of a metal heat absorption tube 3111 and a glass outer tube 3112.

[0030] The system employs antifreeze heat transfer oil and a 311 vacuum heat collection tube structure, which effectively prevents the working fluid from freezing and reduces heat loss, thereby improving heat collection efficiency and system stability during winter operation.

[0031] Optionally, the drive mechanism 33 includes a motor 331 and a reducer 332 electrically connected to the controller 41, wherein the motor 331 drives the solar collector 31 to rotate around its axis through the reducer 332.

[0032] The drive mechanism 33 includes a motor 331 and a reducer 332. The motor 331 is preferably a stepper motor or a servo motor. The reducer 332 drives the solar collector 31 to rotate around its axis, achieving solar tracking. The motor 331 is electrically connected to the controller 41, receiving control commands and executing corresponding actions. The energy storage unit 2 also includes a battery box 21 and a heating device 22 disposed within the battery box 21. The heating device 22 can be an electric heating film or a PTC heater, and is electrically connected to the battery management system. When the battery temperature is lower than a set value, the battery management system activates the heating device 22 to ensure the battery operates within a suitable temperature range, extending battery life. Driving the solar collector 31 to rotate via the motor 331 and reducer 332 achieves solar tracking, maximizing light energy absorption efficiency, and is particularly suitable for low-sunlight conditions in cold regions.

[0033] Optionally, the energy storage unit 2 includes a battery box 21 and a heating device 22 disposed inside the battery box 21, the heating device 22 being electrically connected to the battery management system.

[0034] The battery box 21 is equipped with a heating device 22 to prevent the battery from degrading or being damaged in low-temperature environments, thus ensuring a continuous and stable power supply to the energy storage unit 2. Optionally, the system also includes an emergency mains power interface 5, which is electrically connected to the power supply circuit of the circulating pump 32 via a switch 51.

[0035] The system also features an emergency mains power interface 5, which is electrically connected to the power supply circuit of the circulating pump 32 via a switch 51. When the energy storage unit 2 is low on power or malfunctions, the system can be switched to mains power via switch 51 to ensure continuous operation. This enhances the system's power supply redundancy and reliability.

[0036] Optionally, the environmental sensor group 42 may also include a pressure sensor 423 disposed on the solar collector 31.

[0037] The environmental sensor group 42 may also include a pressure sensor 423 disposed on the collector 31 for monitoring the working fluid pressure in the collector tubes 311 to prevent pipe blockage or rupture due to low temperature, thereby improving system safety.

[0038] Optionally, the control system 4 further includes a human-machine interface 43 and a 4G communication module 44, both of which are electrically connected to the controller 41.

[0039] The control system 4 may also include a human-machine interface 43 and a 4G communication module 44. The human-machine interface 43 may be a touch screen or a button panel, used to display system status and parameter settings. The 4G communication module 44 enables remote monitoring and data transmission, facilitating system management and fault diagnosis in high-altitude and remote areas.

[0040] Optionally, the photovoltaic power generation unit 1, the energy storage unit 2, and the solar thermal collector unit 3 are independently fixed on the ground support.

[0041] The photovoltaic power generation unit 1, energy storage unit 2, and solar thermal collector unit 3 are independently and fixedly installed on the ground support, which facilitates modular installation and maintenance, reduces system complexity, and adapts to the complex terrain and climate conditions of high-altitude and cold regions. Optionally, the system is applied to oil and gas well sites, where the photovoltaic power generation unit 1 and energy storage unit 2 supply power to the pumping unit 6, and the solar thermal collector unit 3 is connected to the oil storage tank 8 through a heat exchanger 7.

[0042] This system can be applied to oil and gas well sites in high-altitude and cold regions. Photovoltaic power generation unit 1 and energy storage unit 2 supply power to the pumping unit 6, while solar thermal collector unit 3 is connected to the oil storage tank 8 via heat exchanger 7 to heat the stored oil, preventing solidification and improving extraction efficiency. This achieves synergistic utilization of photovoltaic and solar thermal energy, enhancing overall energy efficiency and the economic viability of oilfield operations.

[0043] Optionally, the metal heat-absorbing tube 3111 is made of 304 stainless steel, and the glass outer tube 3112 is made of borosilicate glass.

[0044] The metal heat absorber tube 3111 is made of 304 stainless steel, which has good corrosion resistance and thermal conductivity; the glass outer tube 3112 is made of borosilicate glass, which has high light transmittance and good temperature difference resistance, making it suitable for environments with large temperature variations in cold regions. This ensures the long-term stable operation of the heat collector tube 311 in cold environments.

[0045] Explanation: First, solar energy is converted into electrical energy by the photovoltaic modules of photovoltaic power generation unit 1 and stored in the battery pack of energy storage unit 2 via cable; the controller 41 of control system 4 automatically controls the drive mechanism 33 of solar thermal collector unit 3 to adjust the angle of collector 31 to track the sun based on the wind speed, temperature and pressure data collected in real time by environmental sensor group 42, and drives antifreeze heat transfer oil to circulate and absorb heat in vacuum collector tube 311 through circulation pump 32; energy storage unit 2 also supplies power to the system's electrical equipment. When the temperature inside battery box 21 is too low, the battery management system activates heating device 22 to keep the battery warm; in case of extreme weather or power shortage, the system can switch to mains power supply through emergency mains interface 5 and switch 51; when applied to oil and gas well sites, the system can also heat oil storage tank 8 through heat exchanger 7, and realize local and remote monitoring through human-machine interface 43 and 4G communication module 44.

[0046] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A split-type solar thermal energy storage system suitable for high-altitude and cold regions, characterized in that, include: Photovoltaic power generation unit (1); The energy storage unit (2) is electrically connected to the photovoltaic power generation unit (1) via a cable; Photothermal heat collection unit (3), the photothermal heat collection unit (3) includes a collector (31) and a circulation pump (32) that provides power to the collector (31); Control system (4); The circulating pump (32) is electrically connected to the output end of the energy storage unit (2) via the cable; The control system (4) includes a controller (41) and an environmental sensor group (42) electrically connected to the controller (41), the environmental sensor group (42) including at least a wind speed sensor (421) and a temperature sensor (422). The controller (41) is electrically connected to the drive mechanism (33) of the solar thermal collector (3) and the battery management system of the energy storage unit (2).

2. The split-type solar thermal energy storage system suitable for high-altitude and cold regions according to claim 1, characterized in that, The solar thermal collector unit (3) is a trough solar collector, and its heat collection medium is antifreeze heat transfer oil. The heat collection tube (311) of the collector (31) is a vacuum heat collection tube structure composed of a metal heat absorption tube (3111) and a glass outer tube (3112).

3. The split-type solar thermal energy storage system suitable for high-altitude and cold regions according to claim 2, characterized in that, The drive mechanism (33) includes a motor (331) and a reducer (332) electrically connected to the controller (41), wherein the motor (331) drives the solar collector (31) to rotate about its axis via the reducer (332).

4. The split-type solar thermal energy storage system suitable for high-altitude and cold regions according to claim 1, characterized in that, The energy storage unit (2) includes a battery box (21) and a heating device (22) disposed in the battery box (21), the heating device (22) being electrically connected to the battery management system.

5. The split-type solar thermal energy storage system suitable for high-altitude and cold regions according to claim 1, characterized in that, The system also includes an emergency mains power interface (5), which is electrically connected to the power supply circuit of the circulating pump (32) via a switch (51).

6. The split-type solar thermal energy storage system suitable for high-altitude and cold regions according to claim 1, characterized in that, The environmental sensor group (42) also includes a pressure sensor (423) disposed on the solar collector (31).

7. The split-type solar thermal energy storage system suitable for high-altitude and cold regions according to claim 1, characterized in that, The control system (4) further includes a human-machine interface (43) and a 4G communication module (44), both of which are electrically connected to the controller (41).

8. The split-type solar thermal energy storage system suitable for high-altitude and cold regions according to claim 1, characterized in that, The photovoltaic power generation unit (1), energy storage unit (2) and solar thermal collector unit (3) are independently fixed on the ground support.

9. The split-type solar thermal energy storage system suitable for high-altitude and cold regions according to any one of claims 1-8, characterized in that, The system is applied to oil and gas well sites. The photovoltaic power generation unit (1) and energy storage unit (2) supply power to the pumping unit (6). The solar thermal collector unit (3) is connected to the oil storage tank (8) through a heat exchanger (7).

10. The split-type solar thermal energy storage system suitable for high-altitude and cold regions according to claim 2, characterized in that, The metal heat-absorbing tube (3111) is made of 304 stainless steel, and the glass outer tube (3112) is made of borosilicate glass.

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