Solar particle heat storage and heat exchange device and method

Abstract

In the device, a horizontal rotating device is supported on a base, a supporting frame is connected with the horizontal rotating device so as to horizontally rotate along with the horizontal rotating device, one end of the rotating device supporting frame is connected with the supporting frame, and the other end of the rotating device supporting frame is connected with the supporting frame through an angle control device; the particle circulation heating system rotating device is installed on the rotating device supporting frame to provide rotation, the particle heat storage and heat exchange system supporting frame is installed on the particle circulation heating system rotating device, and the particle heat storage and heat exchange system supporting frame is provided with a light condensation system. The light condensation system is provided with a solar tracking system for controlling a horizontal rotating device and an angle control device to move, the particle heat storage and heat exchange system is fixed to a particle heat storage and heat exchange system supporting frame, and the particle heat storage and heat exchange system periodically rotates in a reciprocating mode through a particle circulation heating system rotating device. And particles in the particle heat storage and heat exchange system are heated through the light condensation system.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal energy storage of solar energy, and particularly to a solar particle heat storage and heat exchange device and method. Background Art

[0002] The thermal energy storage technology of solar energy refers to storing solar energy by heating a heat storage medium so as to release the thermal energy for use when needed. This technology is widely applied in fields such as solar thermal power generation and clean heating. The solar thermal energy storage technology mainly includes sensible heat storage, latent heat storage, and thermochemical heat storage.

[0003] Sensible heat storage has the highest degree of commercialization. It stores and releases heat through the temperature change of a substance. The energy storage density is related to the specific heat capacity and temperature of materials (such as molten salt, oil, and water), and its advantage is low cost. Common heat storage media such as molten salt, oil, and water have poor stability at high temperatures, which limits the improvement of the energy storage density. Solid particles have become new heat storage media due to their advantages such as high working temperature (able to withstand over 1000°C), wide working temperature range, good chemical stability, and low cost. In the patent with the application number 202321361559.8, a Brayton solar thermal power generation system based on solid particle heat storage is disclosed. In the patent with the application number 202410693478.0, a concentrating solar-driven coal gasification continuous operation system based on solid particle heat storage is disclosed. In the patent with the application number 202221468276.9, a solid particle energy storage solar thermal power generation system is disclosed. The above systems all absorb solar energy through solid particles and perform sensible heat storage. The particles are heated by a particle collector (heat absorber) and stored in a high-temperature tank. The low-temperature particles after heat exchange are stored in a low-temperature tank and enter the particle collector through a particle conveying system (such as a particle chain bucket conveyor). Although the particles can withstand high temperatures, the sensible heat storage of the particles has a lower energy storage density compared to latent heat storage and thermochemical heat storage, and the particle conveying system increases the heat loss and cost of the particles, and the high-temperature particles have a significant impact on the service life of the conveying system.

[0004] In summary, it is important and urgent to develop a solar particle heat storage and heat exchange device with high energy storage density, small heat loss, and simple and efficient particle circulation at present.

[0005] The information disclosed in the background art section is only used to enhance the understanding of the background of the present invention, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0006] Aiming at the deficiencies or defects existing in the prior art, a solar particle heat storage and heat exchange device and method are provided, which realize two heat storage methods of sensible heat and latent heat through high-temperature-resistant particles and phase change spheres, have high energy storage density, simple and efficient particle circulation, small system heat loss, and simple operation and maintenance.

[0007] The object of the present invention is achieved by the following technical solutions.

[0008] A solar particle heat storage and heat exchange device includes

[0009] a base

[0010] An attitude adjustment system includes

[0011] a horizontal rotation device, which is supported on the base

[0012] a support frame, which is connected to the horizontal rotation device to rotate horizontally therewith

[0013] a rotating device support frame, one end of which is connected to the support frame, and the other end is connected to the support frame through an angle control device, and the angle between the rotating device support frame and the horizontal plane is adjusted through the angle control device;

[0014] a particle circulating heating system, which includes

[0015] a particle circulating heating system rotating device, which is installed on the rotating device support frame to provide rotation

[0016] a particle heat storage and heat exchange system support frame, which is installed on the particle circulating heating system rotating device, and the particle heat storage and heat exchange system support frame is provided with a light concentrating system, and the light concentrating system is provided with a sun tracking system for controlling the movement of the horizontal rotation device and the angle control device

[0017] a particle heat storage and heat exchange system, which is fixed on the particle heat storage and heat exchange system support frame, and the particle heat storage and heat exchange system rotates periodically and reciprocally through the particle circulating heating system rotating device, and the particles in the particle heat storage and heat exchange system are heated through the light concentrating system.

[0018] In the above-mentioned solar particle heat storage and heat exchange device, the particle heat storage and heat exchange system includes

[0019] a first particle heat storage tank

[0020] a first particle shunt system, which communicates with the first particle heat storage tank, and the first particle shunt system includes a particle heat exchange channel, a particle discharge channel and a particle heat collection channel for dividing the particles flowing out of the first particle heat storage tank into three paths

[0021] a second particle heat storage tank

[0022] a second particle shunt system, which communicates with the second particle heat storage tank, and the second particle shunt system divides the particles flowing out of the second particle heat storage tank into three paths and communicates with the particle heat exchange channel, the particle loading channel and the particle heat collection channel.

[0023] In the described solar particle heat storage and heat exchange device, a particle loading valve is provided at the outlet of the particle loading channel, and a particle discharging valve is provided at the outlet of the particle discharging channel.

[0024] In the described solar particle heat storage and heat exchange device, a first particle heat collecting valve, a first particle heat collector, a particle storage tank, a second particle heat collector, and a second particle heat collecting valve are sequentially arranged in the direction of the particle heat collecting channel from the first particle shunt system towards the second particle shunt system. The flow rates of the particles in the first particle heat collector and the second particle heat collector during the periodic reciprocating rotation of the particle heat storage and heat exchange system are respectively controlled by the first particle heat collecting valve and the second particle heat collecting valve;

[0025] A first particle heat exchange valve, a particle heat exchanger, and a second particle heat exchange valve are sequentially arranged in the direction of the particle heat exchange channel from the first particle shunt system towards the second particle shunt system. The flow rates of the particles in the particle heat exchanger during the periodic reciprocating rotation of the particle heat storage and heat exchange system are controlled by the first particle heat exchange valve and the second particle heat exchange valve.

[0026] In the described solar particle heat storage and heat exchange device, the rotating device of the particle circulation heating system includes a fluid medium rotating joint support. The fluid medium inlet rotating joint of the particle heat exchanger and the fluid medium outlet rotating joint of the particle heat exchanger are fixed on the fluid medium rotating joint support and are respectively connected to the fluid medium inlet and outlet of the particle heat exchanger.

[0027] In the described solar particle heat storage and heat exchange device, a phase change sphere, a temperature measuring device, and a particle filling height measuring device are arranged in the first particle heat storage tank. The phase change spheres are orderly stacked by the constraint of the grille fixed on the outer shell of the storage tank. A phase change sphere filter screen is arranged at the outlet of the particle heat storage tank to realize the orderly and disorderly stacking of the phase change spheres during the periodic reciprocating rotation of the particle heat storage and heat exchange system, and strengthen the heat transfer between the particles and the phase change spheres.

[0028] In the described solar particle heat storage and heat exchange device, the minimum distance between the phase change sphere filter screen and the grille is greater than 3 times the particle diameter. The mesh size of the phase change sphere filter screen is smaller than the diameter of the phase change sphere. The phase change sphere is a hollow spherical shell, and a phase change medium is encapsulated inside it.

[0029] In the described solar particle heat storage and heat exchange device, the control box is arranged on the support frame to control the operation of the solar particle heat storage and heat exchange device.

[0030] In the described solar particle heat storage and heat exchange device, the solar particle heat storage and heat exchange device is connected and used with an external energy conversion and / or storage device.

[0031] The heat exchange method of the solar energy particle heat storage and heat exchange device includes:

[0032] S1: At the initial moment, store the particles in the first particle heat storage tank, and rotate the first particle heat storage tank to the top through the rotating device of the particle circulation heating system;

[0033] S2: Fully open the first particle heat exchange valve, set the opening angle of the second particle heat exchange valve according to the required heat exchange amount and the outlet temperature of the fluid medium, and open the second particle heat exchange valve to make the particles in the particle heat exchanger densely filled;

[0034] S3: Monitor the particle temperature and the particle filling height in the first particle heat storage tank, and monitor the outlet flow rate of the second particle heat exchange valve. When the particle filling height in the first particle heat storage tank or the outlet flow rate of the second particle heat exchange valve reaches the set critical value, close the first particle heat exchange valve and the second particle heat exchange valve, and start the rotating device of the particle circulation heating system to rotate the first particle heat storage tank to the bottom;

[0035] S4: Fully open the second particle heat exchange valve, set the opening angle of the first particle heat exchange valve according to the required heat exchange amount and the outlet temperature of the fluid medium, and open the first particle heat exchange valve;

[0036] S5: Monitor the particle temperature and the particle filling height in the second particle heat storage tank, and monitor the outlet flow rate of the first particle heat exchange valve. When the particle filling height in the second particle heat storage tank or the outlet flow rate of the first particle heat exchange valve reaches the set critical value, close the first particle heat exchange valve and the second particle heat exchange valve, and start the rotating device of the particle circulation heating system to rotate the second particle heat storage tank to the bottom;

[0037] S6: Repeat steps S2 - S5. When the particle temperature drops to the set value, store the particles in the first particle heat storage tank and close the first particle heat exchange valve and the second particle heat exchange valve.

[0038] Compared with the prior art, the beneficial effects brought by the present invention are:

[0039] The particle circulating heating system of the present invention realizes continuous heating and / or heat exchange of particles through periodic reciprocating rotation, with small particle heat loss, high energy conversion efficiency, and no particle loss caused by particle transportation. The working temperature range of the particles is wide and not affected by the external temperature. Compared with heat storage media such as molten salt, oil, and water, the particle circulating heating system can operate at lower and higher temperatures. The combination of sensible heat and latent heat storage methods is achieved through high-temperature-resistant particles and phase change spheres. The heat storage particles can be selected from low-cost solid particles such as natural sand and industrial solid bulk materials. The phase change medium in the phase change sphere can be freely replaced according to the heat storage temperature range, and the system can achieve heat storage in different temperature ranges. The particle circulating heating system can simultaneously store and extract heat of the particles, and the flow rate distribution of heat storage and heat extraction particles can be allocated by adjusting the valve opening. The phase change spheres in the particle heat storage tank can be switched between orderly stacking and disorderly stacking through a grille, a phase change sphere filter screen, and a particle circulating heating system rotating device, and the heat exchange efficiency between the particles and the phase change spheres is high.

[0040] The above description is only an overview of the technical solution of the present invention. In order to make the technical means of the present invention clearer and to enable those skilled in the art to implement it according to the content of the specification, and to make the above and other purposes, features, and advantages of the present invention more obvious and understandable, the following will illustrate with specific embodiments of the present invention. Brief Description of the Drawings

[0041] By reading the following detailed description of the preferred specific embodiments, various other advantages and benefits of the present invention will become clear to those of ordinary skill in the art. The drawings in the specification are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. Obviously, the following described drawings are only some embodiments of the present invention, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts. Moreover, throughout the drawings, the same reference numerals are used to represent the same components.

[0042] In the drawings:

[0043] Figure 1 is an axonometric view of the main body components of an embodiment of the present invention;

[0044] Figure 2 is a left view of the main body components of an embodiment of the present invention;

[0045] Figure 3 is a rear view of the main body components of an embodiment of the present invention;

[0046] Figure 4 is a left view of the particle heat storage and heat exchange system of the present invention;

[0047] Figure 5Front view of the particle heat storage and heat exchange system of the present invention;

[0048] Figure 6 Cross-sectional view of the particle heat storage tank of the present invention.

[0049] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments. Detailed implementation manners

[0050] The specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although specific embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0051] It should be noted that certain terms are used in the specification and claims to refer to specific components. Those skilled in the art should understand that technicians may use different terms to refer to the same component. The specification and claims do not use the difference in terms as a way to distinguish components, but use the difference in the functions of components as the criterion for distinction. As mentioned throughout the specification and claims, "comprising" or "including" is an open-ended term and should be interpreted as "including but not limited to". The following description of the embodiments of the present invention is for the purpose of general principles of the specification and is not intended to limit the scope of the present invention. The scope of protection of the present invention shall be defined by the appended claims.

[0052] For the convenience of understanding the embodiments of the present invention, the following will further explain with reference to the accompanying drawings by taking several specific embodiments as examples, and each accompanying drawing does not constitute a limitation to the embodiments of the present invention.

[0053] For better understanding, as Figures 1 to 6 shown, a solar particle heat storage and heat exchange device includes,

[0054] Base 1,

[0055] The attitude adjustment system includes,

[0056] A horizontal rotation device 2, which is supported on the base 1,

[0057] A support frame 4, which is connected to the horizontal rotation device 2 to rotate horizontally therewith,

[0058] A rotating device support frame 6, one end of which is connected to the support frame 4, and the other end is connected to the support frame 4 through an angle control device 5. The angle between the rotating device support frame 6 and the horizontal plane is adjusted through the angle control device 5; further, the angle control device 5 includes a hydraulic cylinder.

[0059] A particle circulating heating system, comprising

[0060] A particle circulating heating system rotating device 10, which is installed on the rotating device support frame 6 to provide rotation

[0061] A particle heat storage and heat exchange system support frame 7, which is installed on the particle circulating heating system rotating device 10. The particle heat storage and heat exchange system support frame 7 is provided with a light concentrating system 9, and the light concentrating system 9 is provided with a solar tracking system for controlling the movement of the horizontal rotating device 2 and the angle control device 5

[0062] The solar tracking system includes a microcontroller, a photoelectric sensor and a bracket. The horizontal rotating device 2 and the angle control device 5 are controlled by the photoelectric sensor and the astronomical algorithm embedded in the microcontroller, so that the device always faces the sun directly, thereby achieving maximum energy capture

[0063] A particle heat storage and heat exchange system 8, which is fixed on the particle heat storage and heat exchange system support frame 7. The particle heat storage and heat exchange system 8 is periodically rotated reciprocally by the particle circulating heating system rotating device 10, and the particles in the particle heat storage and heat exchange system 8 are heated by the light concentrating system 9

[0064] In a preferred embodiment of the solar particle heat storage and heat exchange device, the particle heat storage and heat exchange system 8 includes

[0065] A first particle heat storage tank 8-1

[0066] A first particle shunt system 8-2, which communicates with the first particle heat storage tank 8-1. The first particle shunt system 8-2 includes a particle heat exchange channel, a particle discharge channel and a particle heat collection channel for dividing the particles flowing out of the first particle heat storage tank 8-1 into three paths

[0067] A second particle heat storage tank 8-9

[0068] A second particle shunt system 8-8, which communicates with the second particle heat storage tank 8-9. The second particle shunt system 8-8 divides the particles flowing out of the second particle heat storage tank 8-9 into three paths and communicates with the particle heat exchange channel, the particle loading channel and the particle heat collection channel

[0069] In a preferred embodiment of the solar particle heat storage and heat exchange device, a particle loading valve 8-16 is provided at the outlet of the particle loading channel, and a particle discharge valve 8-10 is provided at the outlet of the particle discharge channel

[0070] In a preferred embodiment of the solar particle heat storage and heat exchange device, in the direction from the first particle shunt system 8-2 to the second particle shunt system 8-8, a first particle heat collection valve 8-3, a first particle heat collector 8-4, a particle storage tank 8-5, a second particle heat collector, and a second particle heat collection valve 8-7 are sequentially arranged in the particle heat collection channel. The first particle heat collection valve 8-3 and the second particle heat collection valve 8-7 are respectively used to control the particle flow rates in the first particle heat collector 8-4 and the second particle heat collector 8-6 during the periodic reciprocating rotation of the particle heat storage and heat exchange system 8;

[0071] In the direction from the first particle shunt system 8-2 to the second particle shunt system 8-8, a first particle heat exchange valve 8-11, a particle heat exchanger 8-12, and a second particle heat exchange valve 8-15 are sequentially arranged in the particle heat exchange channel. The first particle heat exchange valve 8-11 and the second particle heat exchange valve 8-15 are used to control the particle flow rate in the particle heat exchanger 8-12 during the periodic reciprocating rotation of the particle heat storage and heat exchange system 8.

[0072] In a preferred embodiment of the solar particle heat storage and heat exchange device, the particle circulation heating system rotating device 10 includes a fluid medium rotating joint bracket 11. The particle heat exchanger fluid medium inlet rotating joint 8-13 and the particle heat exchanger fluid medium outlet rotating joint 8-14 are fixed on the fluid medium rotating joint bracket 11 and are respectively connected to the fluid medium inlet and outlet of the particle heat exchanger 8-12.

[0073] In a preferred embodiment of the solar particle heat storage and heat exchange device, a phase change sphere, a temperature measuring device, and a particle filling height measuring device are arranged in the first particle heat storage tank 8-1. The phase change spheres are orderly stacked by being restricted by the grid 8-1-4 fixed on the storage tank housing 8-1-2. A phase change sphere filter screen 8-1-3 is arranged at the outlet of the particle heat storage tank. During the periodic reciprocating rotation of the particle heat storage and heat exchange system 8, the orderly and disorderly stacking of the phase change spheres is realized, strengthening the heat transfer between the particles and the phase change spheres.

[0074] In a preferred embodiment of the solar particle heat storage and heat exchange device, the minimum distance between the phase change sphere filter screen 8-1-3 and the grid 8-1-4 is greater than three times the particle diameter. The mesh size of the phase change sphere filter screen 8-1-3 is smaller than the diameter of the phase change sphere. The phase change sphere 8-1-5 is a hollow spherical shell, and a phase change medium is encapsulated inside it.

[0075] In a preferred embodiment of the solar particle heat storage and heat exchange device, the control box 3 is arranged on the support frame 4 to control the operation of the solar particle heat storage and heat exchange device.

[0076] The control box 3 includes a main control module, a power management unit, a signal processing circuit and a communication interface. Each functional module is electrically connected through an internal bus. The control lines of the horizontal rotation device 2, the angle control device 5, the particle circulation heating system rotation device 10, the solar tracking system and the valves and sensors in the particle heat storage and heat exchange system 8 are all connected to the control box 3, and the operation of the solar particle heat storage and heat exchange device is controlled by the main control module in the control box 3.

[0077] In a preferred embodiment of the solar particle heat storage and heat exchange device, the solar particle heat storage and heat exchange device is connected and used with an external energy conversion and / or storage device.

[0078] The heat exchange method of the solar particle heat storage and heat exchange device includes

[0079] S1: At the initial moment, the particles are stored in the first particle heat storage tank 8-1, and the first particle heat storage tank 8-1 is rotated to the top through the particle circulation heating system rotation device 10;

[0080] S2: Fully open the first particle heat exchange valve 8-11, set the opening angle of the second particle heat exchange valve 8-15 according to the required heat exchange amount and the fluid medium outlet temperature, and open the second particle heat exchange valve so that the particles in the particle heat exchanger 8-12 are densely filled;

[0081] S3: Monitor the particle temperature and particle filling height in the first particle heat storage tank 8-1, and monitor the outlet flow rate of the second particle heat exchange valve 8-15. When the particle filling height in the first particle heat storage tank 8-1 or the outlet flow rate of the second particle heat exchange valve 8-15 reaches the set critical value, close the first particle heat exchange valve 8-11 and the second particle heat exchange valve 8-15, and start the particle circulation heating system rotation device 10 to rotate the first particle heat storage tank 8-1 to the bottom;

[0082] S4: Fully open the second particle heat exchange valve 8-15, set the opening angle of the first particle heat exchange valve 8-11 according to the required heat exchange amount and the fluid medium outlet temperature, and open the first particle heat exchange valve 8-11;

[0083] S5: Monitor the particle temperature and particle filling height in the second particle heat storage tank 8-9, and monitor the outlet flow rate of the first particle heat exchange valve 8-11. When the particle filling height in the second particle heat storage tank 8-9 or the outlet flow rate of the first particle heat exchange valve 8-11 reaches the set critical value, close the first particle heat exchange valve 8-11 and the second particle heat exchange valve 8-15, and start the particle circulation heating system rotation device 10 to rotate the second particle heat storage tank 8-9 to the bottom;

[0084] S6: Repeat steps S2 - S5. When the particle temperature drops to the set value, store the particles in the first particle heat storage tank 8 - 1 and close the first particle heat exchange valve 8 - 11 and the second particle heat exchange valve 8 - 15.

[0085] In one embodiment, the solar particle heat storage and heat exchange device includes: an attitude adjustment system and a particle circulation heating system; as Figures 1 to 3 shown. The solar particle heat storage and heat exchange device stores heat by concentrating solar energy to heat solid particles. The attitude adjustment system adjusts the attitude of the particle circulation heating system, including rotation in the horizontal direction and adjustment of the angle with the horizontal plane, to achieve control of the particle flow state within the particle circulation heating system and solar light tracking. The particle circulation heating system realizes continuous heating and / or heat exchange of the particles through periodic reciprocating rotation.

[0086] The solar particle heat storage and heat exchange device stores heat by concentrating solar energy to heat solid particles;

[0087] The attitude adjustment system adjusts the attitude of the particle circulation heating system to achieve control of the particle flow state and solar light tracking;

[0088] The particle circulation heating system realizes continuous heating and / or heat exchange of the particles through periodic reciprocating rotation;

[0089] The attitude adjustment system includes: a horizontal rotation device 2, a support frame 4, an angle control device 5, and a rotation device support frame 6;

[0090] The support frame 4 is connected to the base 1 through the horizontal rotation device 2 and drives its horizontal rotation;

[0091] One end of the rotation device support frame 6 is connected to the support frame 4, and the other end is connected to the support frame 4 through the angle control device 5. The angle between the particle heat storage and heat exchange system 8 and the horizontal plane is adjusted through the angle control device 5;

[0092] The particle circulation heating system includes: a particle heat storage and heat exchange system support frame 7, a particle heat storage and heat exchange system 8, and a particle circulation heating system rotation device 10;

[0093] The particle heat storage and heat exchange system 8 is fixed on the particle heat storage and heat exchange system support frame 7;

[0094] The particle heat storage and heat exchange system support frame 7 is connected to the rotation device support frame 6 through the particle circulation heating system rotation device 10, as Figure 2 shown. The periodic reciprocating rotation of the particle heat storage and heat exchange system 8 is realized through the particle circulation heating system rotation device 10;

[0095] The support frame 7 of the particle heat storage and heat exchange system is provided with a concentrating system 9, which heats the particles in the particle heat storage and heat exchange system 8. The concentrating system 9 is provided with a solar tracking system, which controls the movement of the horizontal rotation device 2 and the angle control device 5 through the solar tracking system to achieve the maximum light energy capture efficiency.

[0096] The particle heat storage and heat exchange system 8 includes: a first particle heat storage tank 8-1, a first particle shunt system 8-2, a first particle collector 8-4, a particle storage tank 8-5, a second particle collector 8-6, a second particle shunt system 8-8, a second particle heat storage tank 8-9, and a particle heat exchanger 8-12.

[0097] The first particle heat storage tank 8-1 is connected to the first particle shunt system 8-2, and the second particle heat storage tank 8-9 is connected to the second particle shunt system 8-8.

[0098] The first particle shunt system 8-2 divides the particles flowing out of the first particle heat storage tank 8-1 into three paths, namely a particle heat exchange channel, a particle discharge channel, and a particle heat collection channel.

[0099] The second particle shunt system 8-8 divides the particles flowing out of the second particle heat storage tank 8-9 into three paths, namely a particle heat exchange channel, a particle loading channel, and a particle heat collection channel.

[0100] The outlet of the particle discharge channel of the first particle shunt system 8-2 is connected to the particle discharge valve 8-10.

[0101] The outlet of the particle loading channel of the second particle shunt system 8-8 is connected to the particle loading valve 8-16.

[0102] Between the particle heat collection channels of the first particle shunt system 8-2 and the second particle shunt system 8-8, a first particle heat collection valve 8-3, a first particle collector 8-4, a particle storage tank 8-5, a second particle collector 8-6, and a second particle heat collection valve 8-7 are sequentially arranged. The first particle heat collection valve 8-3 and the second particle heat collection valve 8-7 are used to control the particle flow rate in the particle collector during the periodic reciprocating rotation of the particle heat storage and heat exchange system 8 and ensure that the particles always maintain a dense filling in the collector, as Figure 4 shown;

[0103] A first particle heat exchange valve 8-11, a particle heat exchanger 8-12, and a second particle heat exchange valve 8-15 are sequentially arranged between the particle heat exchange channels of the first particle flow splitting system 8-2 and the second particle flow splitting system 8-8. The first particle heat exchange valve 8-11 and the second particle heat exchange valve 8-15 are used to control the particle flow rate in the particle heat exchanger 8-12 during the periodic reciprocating rotation of the particle heat storage and heat exchange system 8 and ensure that the particles always maintain a dense filling in the particle heat exchanger 8-12;

[0104] The particle flow splitting system is composed of pipes at multiple different angles. For example, Figure 4 As shown, it enables the particles in the particle heat storage and heat exchange system 8 at different angles to flow out and flow into the first particle heat storage tank 8-1 and the second particle heat storage tank 8-9 smoothly.

[0105] The rotating device 10 of the particle circulating heating system is provided with a fluid medium rotary joint bracket 11. The particle heat exchanger fluid medium inlet rotary joint 8-13 and the particle heat exchanger fluid medium outlet rotary joint 8-14 are fixed on the fluid medium rotary joint bracket 11 and are respectively connected to the fluid medium inlet and outlet of the particle heat exchanger 8-12.

[0106] A phase change sphere, a temperature measuring device, and a particle filling height measuring device are arranged in the first particle heat storage tank. The phase change sphere is composed of a high-strength and corrosion-resistant hollow spherical shell, and a phase change medium is encapsulated inside it;

[0107] The phase change spheres are orderly stacked by being restricted by the grille 8-1-4 fixed on the outer shell 8-1-2 of the storage tank. A phase change sphere filter screen 8-1-3 is arranged at the outlet of the particle heat storage tank. The minimum distance between the phase change sphere filter screen 8-1-3 and the grille 8-1-4 is greater than three times the particle diameter. The mesh size of the phase change sphere filter screen 8-1-3 is smaller than the diameter of the phase change sphere. During the periodic reciprocating rotation of the particle heat storage and heat exchange system 8, the orderly and disorderly stacking of the phase change spheres is realized, strengthening the heat transfer between the particles and the phase change spheres. The first particle heat storage tank is connected to the first particle flow splitting system via the particle heat storage tank interface flange 8-1-1. Further, the structure of the second particle heat storage tank is the same as that of the first particle heat storage tank.

[0108] The particle collector and the particle heat exchanger 8-12 are provided with particle flow rate and temperature monitoring devices. The particle heat storage and heat exchange system 8 is provided with a heat insulation layer. The control box 3 is arranged on the support frame 4 to control the operation of the solar particle heat storage and heat exchange device. Multiple particle collectors are arranged in series and / or in parallel to increase the energy input.

[0109] The light-receiving surface of the particle collector is provided with a high-absorptivity coating, and the particle flow channel of the particle collector is provided with internal fins.

[0110] The solar particle heat storage and heat exchange device is used in connection with other external energy conversion and / or storage devices.

[0111] When the solar particle heat storage and heat exchange device of the present invention is in operation, the particle heat storage process includes the following steps:

[0112] S1: Determine the change range of the angle between the particle heat storage and heat exchange system 8 and the horizontal plane according to the particle flow characteristics and the change of the solar altitude angle;

[0113] S2: At the initial moment, store the particles in the first particle heat storage tank 8-1, and rotate the first particle heat storage tank 8-1 to the top through the particle circulation heating system rotating device 10;

[0114] S3: Start the concentrating system, and adjust the attitude of the particle heat storage and heat exchange system 8 according to the output signal of the solar tracking system;

[0115] S4: Fully open the first particle heat collecting valve 8-3, set the opening angle of the second particle heat collecting valve 8-7 according to the set temperature and the current irradiation intensity, and open the second particle heat collecting valve 8-7;

[0116] S5: Monitor the particle temperature and the particle filling height in the first particle heat storage tank 8-1, and monitor the outlet flow rate of the second particle heat collecting valve 8-7. When the particle filling height in the first particle heat storage tank 8-1 or the outlet flow rate of the second particle heat collecting valve 8-7 reaches the set critical value, close the first particle heat collecting valve 8-3 and the second particle heat collecting valve 8-7, start the particle circulation heating system rotating device 10, and rotate the first particle heat storage tank 8-1 to the bottom;

[0117] S6: Fully open the second particle heat collecting valve 8-7, set the opening angle of the first particle heat collecting valve 8-3 according to the set temperature and the current irradiation intensity, and open the first particle heat collecting valve 8-3;

[0118] S7: Monitor the particle temperature and the particle filling height in the second particle heat storage tank 8-9, and monitor the outlet flow rate of the first particle heat collecting valve 8-3. When the particle filling height in the second particle heat storage tank 8-9 or the outlet flow rate of the first particle heat collecting valve 8-3 reaches the set critical value, close the first particle heat collecting valve 8-3 and the second particle heat collecting valve 8-7, start the particle circulation heating system rotating device 10, and rotate the second particle heat storage tank 8-9 to the bottom;

[0119] S8: Repeat steps S4-S7. When the particle heat storage tank reaches the set temperature or the solar irradiation intensity drops to the set value, close the concentrating system, the first particle heat collecting valve 8-3 and the second particle heat collecting valve 8-7.

[0120] When the solar particle heat storage and heat exchange device of the present invention is in operation, the particle heat exchange process includes the following steps:

[0121] S1: At the initial moment, store the particles in the first particle heat storage tank 8-1, and rotate the first particle heat storage tank 8-1 to the top through the particle circulation heating system rotating device 10;

[0122] S2: Fully open the first particle heat exchange valve 8-11, set the opening angle of the second particle heat exchange valve 8-15 according to the required heat exchange amount and the fluid medium outlet temperature, open the second particle heat exchange valve 8-15, and ensure that the particles in the particle heat exchanger 8-12 are densely filled;

[0123] S3: Monitor the particle temperature and the particle filling height in the first particle heat storage tank 8-1, and monitor the outlet flow rate of the second particle heat exchange valve 8-15. When the particle filling height in the first particle heat storage tank 8-1 or the outlet flow rate of the second particle heat exchange valve 8-15 reaches the set critical value, close the first particle heat exchange valve 8-11 and the second particle heat exchange valve 8-15, start the particle circulation heating system rotating device 10, and rotate the first particle heat storage tank 8-1 to the bottom;

[0124] S4: Fully open the second particle heat exchange valve 8-15, set the opening angle of the first particle heat exchange valve 8-11 according to the required heat exchange amount and the fluid medium outlet temperature, and open the first particle heat exchange valve 8-11;

[0125] S5: Monitor the particle temperature and the particle filling height in the second particle heat storage tank 8-9, and monitor the outlet flow rate of the first particle heat exchange valve 8-11. When the particle filling height in the second particle heat storage tank 8-9 or the outlet flow rate of the first particle heat exchange valve 8-11 reaches the set critical value, close the first particle heat exchange valve 8-11 and the second particle heat exchange valve 8-15, start the particle circulation heating system rotating device 10, and rotate the second particle heat storage tank 8-9 to the bottom;

[0126] S6: Repeat steps S2 - S5. When the particle temperature drops to the set value, store the particles in the first particle heat storage tank 8-1 and close the first particle heat exchange valve 8-11 and the second particle heat exchange valve 8-15.

[0127] When the solar particle heat storage and heat exchange device of the present invention is in operation, the particle heat storage process and the heat exchange process can be carried out simultaneously.

[0128] In the base and attitude adjustment system, the base 1 supports the entire device, the horizontal rotating device 2 is installed on the base, the support frame 4 realizes horizontal rotation through the horizontal rotating device 2, one end of the rotating device support frame 6 is connected to the support frame 4, and the other end is connected to the support frame 4 through the angle control device 5. The angle between the rotating device support frame 6 and the horizontal plane is adjusted through the angle control device 5. This design enables the device to automatically adjust the angle according to the position of the sun, maximizing the light energy capture efficiency.

[0129] The angle control device 5 includes a hydraulic cylinder for precisely controlling the angle of the rotating device support frame 6. The hydraulic cylinder provides high-precision angle control, ensuring that the device can accurately track the sun's position.

[0130] In the particle circulation heating system, the particle circulation heating system rotating device 10 is installed on the rotating device support frame 6, providing a periodic reciprocating rotation function. The particle circulation heating system rotating device 10 ensures the cyclic flow of particles between the first particle heat storage tank 8-1 and the second particle heat storage tank 8-9, realizing the efficient transport and energy transfer of particles.

[0131] The particle heat storage and heat exchange system support frame 7 is installed on the particle circulation heating system rotating device 10 and is provided with a concentrating system 9, which is equipped with a sun tracking system. The concentrating system concentrates the sun's rays to increase the energy density, while the sun tracking system ensures the efficient operation of the concentrating system. The particle heat storage and heat exchange system 8 is fixed on the particle heat storage and heat exchange system support frame 7 and heats the internal particles through the concentrating system 9. The particles, as the heat storage medium, can store a large amount of thermal energy at high temperatures, suitable for long-term energy storage.

[0132] The particle heat storage and heat exchange system includes components such as the first particle heat storage tank 8-1, the first particle diversion system 8-2, the second particle heat storage tank 8-9, and the second particle diversion system 8-8. These components work together to achieve the effective distribution and flow control of particles, improving the flexibility and efficiency of the system. The first particle diversion system 8-2 divides the particles in the first particle heat storage tank 8-1 into three paths: the particle heat exchange channel, the particle discharge channel, and the particle heat collection channel; the second particle diversion system 8-8 performs a similar function.

[0133] The design of the diversion system optimizes the flow path of the particles, ensuring the effective transfer and recovery of heat.

[0134] A particle loading valve 8-16 is provided at the outlet of the particle loading channel, and a particle discharge valve 8-10 is provided at the outlet of the particle discharge channel. The use of the valves allows for precise control of the particle flow rate, thereby optimizing the operating efficiency of the system. The particle heat collection channel is provided with multiple valves (such as the first particle heat collection valve 8-3 and the second particle heat collection valve 8-7) and heat collectors (such as the first particle heat collector 8-4 and the second particle heat collector 8-6) to control the particle flow rate through these valves.

[0135] The heat collector and the valves work together to ensure that the particles are densely packed during the heat collection process, improving the heat exchange efficiency. The particle heat exchange channel is provided with a particle heat exchanger 8-12 and corresponding valves (such as the first particle heat exchange valve 8-11 and the second particle heat exchange valve 8-15) for controlling the particle flow rate and the heat exchange process. The design of the heat exchanger optimizes the heat transfer process, ensuring efficient energy conversion.

[0136] A first particle heat storage tank 8-1 is provided with phase change spheres, a temperature measuring device and a particle filling height measuring device. The phase change spheres enhance the heat storage capacity by absorbing and releasing latent heat. The temperature measuring device and the particle filling height measuring device provide real-time monitoring data to ensure the stable operation of the system. The phase change spheres are constrained by a grille 8-1-4 fixed to the outer shell 8-1-2 of the storage tank. A phase change sphere filter screen 8-1-3 is provided at the outlet of the particle heat storage tank. During the periodic reciprocating rotation of the particle heat storage and heat exchange system 8, the orderly and disorderly accumulation of the phase change spheres is realized, and the heat transfer between the particles and the phase change spheres is strengthened. The design of the phase change spheres significantly improves the heat storage efficiency and reduces the heat loss at the same time.

[0137] The control box 3 is arranged on the support frame 4 to control the operation of the solar particle heat storage and heat exchange device. The control box integrates a main control module, a power management unit, a signal processing circuit and a communication interface, ensuring the automated and intelligent operation of the system.

[0138] The particle heat storage process and the heat exchange process realize the particle heat storage and heat exchange process through a series of steps (such as S1-S8), ensuring that the particles can effectively utilize solar energy in different states.

[0139] The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present application to the form disclosed herein. Although several example aspects and embodiments have been discussed above, those skilled in the art will recognize some of their variations, modifications, alterations, additions, and subcombinations.

Claims

1. A solar energy particle heat storage and heat exchange device, characterized in that, It includes a base The attitude adjustment system includes a horizontal rotation device supported on the base a support frame connected to the horizontal rotation device to rotate horizontally therewith a rotating device support frame, one end of which is connected to the support frame, and the other end is connected to the support frame through an angle control device, and the included angle of the rotating device support frame relative to the horizontal plane is adjusted through the angle control device; a particle circulation heating system, which includes a particle circulation heating system rotating device installed on the rotating device support frame to provide rotation a particle heat storage and heat exchange system support frame installed on the particle circulation heating system rotating device, and a concentrating system is provided on the particle heat storage and heat exchange system support frame, and a solar tracking system for controlling the movement of the horizontal rotation device and the angle control device is provided on the concentrating system a particle heat storage and heat exchange system fixed on the particle heat storage and heat exchange system support frame, and the particle heat storage and heat exchange system rotates periodically and reciprocally through the particle circulation heating system rotating device, and the particles in the particle heat storage and heat exchange system are heated through the concentrating system.

2. The solar particle heat storage and heat exchange device according to claim 1, characterized in that, Preferably, the particle heat storage and heat exchange system includes a first particle heat storage tank a first particle shunt system communicating with the first particle heat storage tank, and the first particle shunt system includes a particle heat exchange channel, a particle discharge channel and a particle heat collection channel for dividing the particles flowing out of the first particle heat storage tank into three paths a second particle heat storage tank a second particle shunt system communicating with the second particle heat storage tank, and the second particle shunt system divides the particles flowing out of the second particle heat storage tank into three paths and communicates with the particle heat exchange channel, the particle loading channel and the particle heat collection channel.

3. The solar particle heat storage and heat exchange device according to claim 2, characterized in that, A particle loading valve is provided at the outlet of the particle loading channel, and a particle discharge valve is provided at the outlet of the particle discharge channel.

4. The solar particle heat storage and heat exchange device according to claim 2, wherein The following are sequentially arranged on the particle heat collection channel in the direction from the first particle shunt system to the second particle shunt system: a first particle heat collection valve, a first particle heat collector, a particle storage tank, a second particle heat collector and a second particle heat collection valve, and the particle flow rates in the first particle heat collector and the second particle heat collector during the periodic reciprocating rotation of the particle heat storage and heat exchange system are controlled by the first particle heat collection valve and the second particle heat collection valve respectively; The following are sequentially arranged on the particle heat exchange channel in the direction from the first particle shunt system to the second particle shunt system: a first particle heat exchange valve, a particle heat exchanger and a second particle heat exchange valve, and the particle flow rates in the particle heat exchanger during the periodic reciprocating rotation of the particle heat storage and heat exchange system are controlled by the first particle heat exchange valve and the second particle heat exchange valve.

5. The solar particle heat storage and heat exchange device according to claim 4, characterized in that, The particle circulation heating system rotating device includes a fluid medium rotary joint support, and a particle heat exchanger fluid medium inlet rotary joint and a particle heat exchanger fluid medium outlet rotary joint are fixed on the fluid medium rotary joint support and are respectively connected to the fluid medium inlet and outlet of the particle heat exchanger.

6. The solar particle heat storage and heat exchange device according to claim 2, characterized in that, A phase change sphere, a temperature measuring device and a particle filling height measuring device are arranged in the first particle heat storage tank. The phase change spheres are orderly stacked by being constrained by a grid fixed to the outer shell of the storage tank. A phase change sphere filter screen is arranged at the outlet of the particle heat storage tank. During the periodic reciprocating rotation of the particle heat storage and heat exchange system, the orderly and disorderly stacking of the phase change spheres is realized, and the heat transfer between the particles and the phase change spheres is strengthened.

7. The solar particle heat storage and heat exchange device according to claim 6, characterized in that, The minimum distance between the phase change sphere filter screen and the grid is greater than three times the particle diameter. The mesh size of the phase change sphere filter screen is smaller than the diameter of the phase change sphere. The phase change sphere is a hollow spherical shell, and a phase change medium is encapsulated inside it.

8. The solar particle heat storage and heat exchange device according to claim 1, characterized in that, The control box is arranged on the support frame to control the operation of the solar particle heat storage and heat exchange device.

9. The solar particle heat storage and heat exchange device according to claim 1, characterized in that, The solar particle heat storage and heat exchange device is connected and used with an external energy conversion and / or storage device.

10. The heat exchange method of the solar particle heat storage and heat exchange device according to any one of claims 1-9, characterized in that It includes S1: At the initial moment, store the particles in the first particle heat storage tank, and rotate the first particle heat storage tank to the top through the rotating device of the particle circulating heating system; S2: Fully open the first particle heat exchange valve, set the opening angle of the second particle heat exchange valve according to the required heat exchange amount and the outlet temperature of the fluid medium, and open the second particle heat exchange valve to make the particles in the particle heat exchanger densely filled; S3: Monitor the particle temperature and particle filling height in the first particle heat storage tank, and monitor the outlet flow rate of the second particle heat exchange valve. When the particle filling height in the first particle heat storage tank or the outlet flow rate of the second particle heat exchange valve reaches the set critical value, close the first particle heat exchange valve and the second particle heat exchange valve, and start the rotating device of the particle circulating heating system to rotate the first particle heat storage tank to the bottom; S4: Fully open the second particle heat exchange valve, set the opening angle of the first particle heat exchange valve according to the required heat exchange amount and the outlet temperature of the fluid medium, and open the first particle heat exchange valve; S5: Monitor the particle temperature and particle filling height in the second particle heat storage tank, and monitor the outlet flow rate of the first particle heat exchange valve. When the particle filling height in the second particle heat storage tank or the outlet flow rate of the first particle heat exchange valve reaches the set critical value, close the first particle heat exchange valve and the second particle heat exchange valve, and start the rotating device of the particle circulating heating system to rotate the second particle heat storage tank to the bottom; S6: Repeat steps S2 - S5. When the particle temperature drops to the set value, store the particles in the first particle heat storage tank and close the first particle heat exchange valve and the second particle heat exchange valve.

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