Thermal energy conversion and storage device based on photovoltaic power generation

Abstract

The utility model relates to the technical field of energy conversion, and discloses a thermal energy conversion and storage device based on photovoltaic power generation, which comprises a heat storage silo, a base, a filling port, a discharge port, a heat exchange water inlet, a heat exchange water outlet, a power line and a monitoring control computer, sand is used as a heat energy storage medium and is an environment-friendly energy storage solution, materials used by the sand are rich and environment-friendly, and the sand has high heat capacity, so that the sand can store a large amount of heat energy under the condition of no obvious temperature loss; when heat energy needs to be released and external fluid passes through the heat exchange U-shaped pipe, the fluid exchanges heat with the high-temperature sand, absorbs the heat energy of the sand and is heated, the sensors monitor the temperature of the fluid when the fluid enters, flows through and leaves, and the efficiency and safety of the heat energy transfer process are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of energy conversion, and in particular to a thermal energy conversion and energy storage device based on photovoltaic power generation. Background Art

[0002] Currently, there are few technical products for energy storage and conversion utilization, and the common electric energy storage and conversion technologies have harsh conditions, require favorable geographical conditions and sufficient minerals, and are relatively costly. Although coal-fired power generation is a form of energy storage, it has problems such as high pollution, high cost, small reserves, short life, and a small range of applications. It is not suitable for large-scale storage and transportation of energy. The thermal energy conversion and storage device based on photovoltaic power generation has broad application prospects in the field of energy and power engineering due to its high efficiency, environmental protection, and practicality. It can effectively utilize solar energy for thermal energy conversion and storage, providing strong support for solving the energy crisis and promoting sustainable development. To this end, we propose a thermal energy conversion and storage device based on photovoltaic power generation. Utility Model Content

[0003] (1) Technical problems solved

[0004] In view of the deficiencies of the existing technology, the present invention provides a thermal energy conversion and energy storage device based on photovoltaic power generation, which solves the above-mentioned problems.

[0005] (2) Technical solution

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a thermal energy conversion and storage device based on photovoltaic power generation, comprising a heat storage silo, a base, a filling port, a discharge port, a heat exchange water inlet, a heat exchange water outlet, a power cord and a monitoring and control computer, wherein the interior of the heat storage silo is filled with sand, a filling port is provided at the top of the heat storage silo, a base is fixedly installed at the bottom of the heat storage silo, a discharge port is provided on one side of the outer surface of the heat storage silo, a monitoring and control computer is provided on the surface of the heat storage silo close to the discharge port, a heat exchange water inlet is provided on one side of the outer surface of the heat storage silo, a heat exchange water outlet is provided at the end of the heat storage silo facing away from the heat exchange water inlet, and a power cord is provided on one side of the base.

[0007] Preferably, the heat storage silo is made of an insulated steel container.

[0008] Preferably, a plurality of medium temperature sensors are provided at the bottom of the heat storage silo.

[0009] Preferably, a heat exchange U-shaped tube is provided inside the heat storage silo, and one end of the heat exchange water inlet and the heat exchange water outlet extends through the interior of the heat storage silo and is connected to the heat exchange U-shaped tube.

[0010] Preferably, the heat exchange U-shaped tube includes an inlet temperature sensor, a U-shaped tube temperature sensor, and an outlet temperature sensor. An inlet temperature sensor is fixedly installed at the interface between the heat exchange U-shaped tube and the heat exchange inlet, an outlet temperature sensor is fixedly installed at the interface between the heat exchange U-shaped tube and the heat exchange outlet, and a U-shaped tube temperature sensor is arranged in the middle section of the heat exchange U-shaped tube.

[0011] Preferably, a plurality of heating resistance grids and energizing brackets are further arranged inside the heat storage silo. Both ends of the plurality of heating resistance grids are fixedly installed inside the heat storage silo through the plurality of energizing brackets, and one end of the energizing bracket extends through the bottom end of the heat storage silo and communicates with the inside of the base.

[0012] Preferably, a power controller is arranged inside the base. The power cord extends through and is connected to the power controller inside the base, and the power controller connects the plurality of energizing brackets together through the power cord.

[0013] (III) Beneficial effects

[0014] Compared with the prior art, the present utility model provides a thermal energy conversion and energy storage device based on photovoltaic power generation, which has the following beneficial effects:

[0015] 1. This thermal energy conversion and energy storage device based on photovoltaic power generation uses sand as a heat energy storage medium, which is an environmentally friendly energy storage solution because the materials used for sand are abundant and environmentally friendly, and sand has a high heat capacity, which means that it can store a large amount of heat energy without significant temperature loss.

[0016] 2. When this thermal energy conversion and energy storage device based on photovoltaic power generation needs to release heat energy, when an external fluid passes through the heat exchange U-shaped tube, the fluid exchanges heat with the high-temperature sand, absorbs the heat energy of the sand and heats up. Each group of sensors respectively monitors the temperature when the fluid enters, flows through, and leaves, ensuring the efficiency and safety of the heat energy transfer process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0018] Figure 2 is a sectional structural schematic diagram of the present utility model;

[0019] Figure 3 is a top view structural schematic diagram of the present utility model.

[0020] In the figure: 1. Heat storage silo; 2. Base; 3. Filling port; 4. Discharge port; 5. Heat exchange water inlet; 6. Heat exchange water outlet; 7. Power cord; 8. Heating resistor network; 9. Power controller; 10. Heat exchange U-tube; 11. Water inlet temperature sensor; 12. U-tube temperature sensor; 13. Water outlet temperature sensor; 14. Medium temperature sensor; 15. Monitoring and control computer; 16. Power bracket. DETAILED DESCRIPTION

[0021] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0022] See also Figures 1-3 , a thermal energy conversion and storage device based on photovoltaic power generation, including a heat storage silo 1, a base 2, a filling port 3, a discharge port 4, a heat exchange water inlet 5, a heat exchange water outlet 6, a power cord 7 and a monitoring and control computer 15. The medium filled inside the heat storage silo 1 is sand, and a filling port 3 is provided at the top of the heat storage silo 1, and a base 2 is fixedly installed at the bottom end of the heat storage silo 1. A discharge port 4 is provided on one side of the outer surface of the heat storage silo 1, and a monitoring and control computer 15 is provided on the surface of the heat storage silo 1 near the discharge port 4. A heat exchange water inlet 5 is provided on one side of the outer surface of the heat storage silo 1, and a heat exchange water outlet 6 is provided at the end of the heat storage silo 1 away from the heat exchange water inlet 5. A power cord 7 is provided on one side of the base 2. Using sand as a heat energy storage medium is an environmentally friendly energy storage solution because the materials used in sand are abundant and environmentally friendly, and sand has a high heat capacity, which means that it can store a large amount of heat energy without significant temperature loss.

[0023] Furthermore, the heat storage silo 1 is made of an insulating steel container.

[0024] Furthermore, a plurality of medium temperature sensors 14 are provided at the bottom of the heat storage silo 1 .

[0025] Furthermore, a heat exchange U-shaped tube 10 is provided inside the heat storage silo 1 , and one end of the heat exchange water inlet 5 and the heat exchange water outlet 6 both extend through the interior of the heat storage silo 1 and are connected to the heat exchange U-shaped tube 10 .

[0026] Further, the heat exchange U-shaped tube 10 includes an inlet temperature sensor 11, a U-shaped tube temperature sensor 12, and an outlet temperature sensor 13. The inlet temperature sensor 11 is fixedly installed at the interface between the heat exchange U-shaped tube 10 and the heat exchange inlet 5. The outlet temperature sensor 13 is fixedly installed at the interface between the heat exchange U-shaped tube 10 and the heat exchange outlet 6. The U-shaped tube temperature sensor 12 is arranged in the middle section of the heat exchange U-shaped tube 10. When heat energy needs to be released, when the external fluid passes through the heat exchange U-shaped tube, the fluid exchanges heat with the high-temperature sand, absorbs the heat energy of the sand and heats up. Each group of sensors respectively monitors the temperature of the fluid when it enters, flows through, and leaves, ensuring the efficiency and safety of the heat energy transfer process.

[0027] Further, a plurality of heating resistor grids 8 and energizing brackets 16 are also arranged inside the heat storage silo 1. Both ends of the plurality of heating resistor grids 8 are fixedly installed inside the heat storage silo 1 through the plurality of energizing brackets 16. One end of the energizing bracket 16 penetrates and extends out of the bottom end of the heat storage silo 1 and is communicated with the inside of the base 2.

[0028] Further, a power controller 9 is arranged inside the base 2. The power cord 7 penetrates and extends into the inside of the base 2 and is connected to the power controller 9. The power controller 9 connects the plurality of energizing brackets 16 together through the power cord 7.

[0029] Working principle: Sand is used as the heat energy storage medium. When there is surplus electric energy in a photovoltaic power generation system, for example, the power supply controller 9 receives the electric energy and transmits it to the energized support 16 through the power cord 7. The heating resistance network 8 on the energized support 16 starts to work, converting the electric energy into heat energy, and then heating the sand in the heat storage silo 1. Due to its high specific heat capacity, the sand can store a large amount of heat energy. The medium temperature sensor 14 inside the heat storage silo 1 monitors the temperature of the sand in real time to ensure that the sand is heated within a safe temperature range. During the release process, when heat energy needs to be released, the external fluid enters the heat exchange U-shaped tube 10 through the heat exchange water inlet 5. In the heat exchange U-shaped tube 10, the fluid exchanges heat with the high-temperature sand, absorbs the heat energy of the sand and heats up. The inlet water temperature sensor 11, the U-shaped tube temperature sensor 12, and the outlet water temperature sensor 13 respectively monitor the temperature of the fluid when it enters, flows through, and leaves the heat exchange U-shaped tube 10 to ensure the efficiency and safety of the heat energy transfer process. The heated fluid flows out through the heat exchange water outlet 6 and is used for heating, hot water, etc. The monitoring and control computer 15 receives and processes the data from each temperature sensor, and displays the temperature conditions in the heat storage silo and the heat exchange U-shaped tube in real time. Based on the monitoring data, the monitoring and control computer 15 can intelligently adjust the power of the heating resistance network 8, thereby controlling the heating speed and temperature of the sand. If abnormal temperatures are detected or the system malfunctions, the monitoring and control computer 15 will immediately issue an alarm and take corresponding safety measures, such as cutting off the power supply or starting an emergency cooling system. In summary, the sand can convert electric energy into heat energy and store it in the sand, and then release the heat energy as needed, achieving an effective conversion and long-term storage between electric energy and heat energy. This system not only has the characteristics of high efficiency and environmental protection, but also has the functions of intelligent monitoring and management, ensuring the safe and stable operation of the system. At the same time, no pollution is generated during the energy storage and release processes. The sand can maintain a high temperature for several months without significant temperature drop. The sand has a high heat capacity, which means it can store a large amount of heat energy without significant temperature loss. Using sand to store heat energy is an environmentally friendly energy storage solution because the materials used in sand are abundant and environmentally friendly.

[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A thermal energy conversion and energy storage device based on photovoltaic power generation, comprising a heat storage silo (1), a base (2), a filling port (3), a discharge port (4), a heat exchange water inlet (5), a heat exchange water outlet (6), a power cord (7) and a monitoring and control computer (15). The medium filled inside the heat storage silo (1) is sand. It is characterized in that: The top of the heat storage silo (1) is provided with a filling port (3), the bottom of the heat storage silo (1) is fixedly mounted with a base (2), one side of the outer surface of the heat storage silo (1) is provided with a discharge port (4), the surface of the heat storage silo (1) close to the discharge port (4) is provided with a monitoring and control computer (15), one side of the outer surface of the heat storage silo (1) is provided with a heat exchange water inlet (5), the end of the heat storage silo (1) away from the heat exchange water inlet (5) is provided with a heat exchange water outlet (6), and one side of the base (2) is provided with a power cord (7).

2. The thermal energy conversion and energy storage device based on photovoltaic power generation according to claim 1, wherein: The heat storage silo (1) is made of an insulating steel container.

3. A thermal energy conversion and energy storage device based on photovoltaic power generation according to claim 1, characterized in that: A plurality of groups of medium temperature sensors (14) are provided at the bottom end of the interior of the heat storage silo (1).

4. A thermal energy conversion and energy storage device based on photovoltaic power generation according to claim 1, characterized in that: A heat exchange U-shaped tube (10) is provided inside the heat storage silo (1), and one end of the heat exchange water inlet (5) and the heat exchange water outlet (6) both extend through the interior of the heat storage silo (1) and are connected to the heat exchange U-shaped tube (10).

5. The thermal energy conversion energy storage device based on photovoltaic power generation according to claim 4, wherein: The heat exchange U-shaped tube (10) comprises a water inlet temperature sensor (11), a U-shaped tube temperature sensor (12) and a water outlet temperature sensor (13); the water inlet temperature sensor (11) is fixedly installed at the interface between the heat exchange U-shaped tube (10) and the heat exchange water inlet (5); the water outlet temperature sensor (13) is fixedly installed at the interface between the heat exchange U-shaped tube (10) and the heat exchange water outlet (6); and the U-shaped tube temperature sensor (12) is provided in the middle section of the heat exchange U-shaped tube (10).

6. The thermal energy conversion energy storage device based on photovoltaic power generation according to claim 1, characterized in that: The interior of the heat storage silo (1) is further provided with a plurality of groups of heating resistor nets (8) and powered brackets (16), both ends of the plurality of groups of heating resistor nets (8) are fixedly mounted inside the heat storage silo (1) via the plurality of groups of powered brackets (16), and one end of the powered bracket (16) extends through the bottom end of the heat storage silo (1) and is in communication with the interior of the base (2).

7. A thermal energy conversion and energy storage device based on photovoltaic power generation according to claim 6, characterized in that: A power controller (9) is provided inside the base (2), and the power line (7) extends through the base (2) and is connected to the power controller (9). The power controller (9) connects multiple groups of powered brackets (16) together through the power line (7).

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