Photo-thermal energy storage system

Abstract

The invention discloses a photo-thermal energy storage system, and relates to the technical field of photo-thermal energy storage, and the photo-thermal energy storage system is characterized in that a phase change substance is arranged in an energy storage box, a heat exchange flow path penetrates through the energy storage box and is in heat exchange cooperation with the phase change substance, a cooling device comprises a heat exchange shell and a water absorption gel plate, and a solar photovoltaic panel abuts against the heat exchange shell. A mounting cavity is defined by the heat exchange shell, the heat exchange shell is provided with a first wall part and a second wall part which are opposite, a mounting cavity outlet is formed in the first wall part, a mounting cavity inlet is formed in the second wall part, and the two ends of the heat exchange flow path are connected with the mounting cavity outlet and the mounting cavity inlet correspondingly to form a circulating flow path; the water absorption gel plate is arranged in the mounting cavity and abuts against the heat exchange shell, and a steam space is formed between the first wall part and the water absorption gel plate. The heat of the solar photovoltaic panel is absorbed through the water absorption gel plate, and the heat exchange flow path is matched with the phase change material in a heat exchange manner, so that the working efficiency of the solar photovoltaic panel and the solar energy utilization rate can be improved, and energy conservation and emission reduction are facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of photothermal energy storage, and in particular to a photothermal energy storage system. Background Art

[0002] In the related technologies, photovoltaic energy, as a clean and renewable energy form, has received extensive attention and application. Due to the selective absorption of electromagnetic wave frequencies by the photoelectric effect, high-frequency light waves can be used for photovoltaic power generation while the energy of low-frequency light waves will be wasted and dissipated in the form of heat, which will also greatly increase the temperature of solar photovoltaic panels and further reduce the conversion efficiency of solar photovoltaic panels, which makes the energy utilization rate of solar photovoltaic panels not high. The insufficient energy utilization rate of solar energy and the high temperature of solar photovoltaic panels, which lead to low efficiency of solar photovoltaic panels, are the problems that need to be solved urgently in the current solar photovoltaic modules. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to propose a solar thermal energy storage system that can absorb the heat of solar photovoltaic panels to reduce the working temperature of solar photovoltaic panels, improve the working efficiency of solar photovoltaic panels, and improve the utilization rate of solar energy, which is also conducive to energy conservation and emission reduction.

[0004] According to an embodiment of the present invention, the photothermal energy storage system includes: a heat exchange flow path and an energy storage box, wherein a phase change material is arranged in the energy storage box, the heat exchange flow path is arranged in the energy storage box and cooperates with the phase change material for heat exchange; a solar photovoltaic panel and a cooling device, wherein the cooling device includes a heat exchange shell and a water-absorbing gel plate, the solar photovoltaic panel and the heat exchange shell are in abutment with each other, the heat exchange shell defines an installation cavity, the heat exchange shell has a first wall portion and a second wall portion opposite to each other, the first wall portion forms an installation cavity outlet, the second wall portion forms an installation cavity inlet, the two ends of the heat exchange flow path are respectively connected to the installation cavity outlet and the installation cavity inlet to form a circulation flow path, the water-absorbing gel plate is arranged in the installation cavity and in abutment with the heat exchange shell, and the water-absorbing gel plate is spaced apart from the first wall portion to form a steam space between the first wall portion and the water-absorbing gel plate.

[0005] According to the photothermal energy storage system of the embodiment of the present invention, the heat of the solar photovoltaic panel is absorbed by the water-absorbing gel plate to reduce the working temperature of the solar photovoltaic panel, effectively improve the working environment of the solar photovoltaic panel, and improve the working efficiency of the solar photovoltaic panel. Through the cooperation of the heat exchange flow path and the phase change material heat exchange, the heat of the solar photovoltaic panel can be stored in the energy storage box and used for heating needs, thereby improving the utilization rate of solar energy and being beneficial to energy conservation and emission reduction.

[0006] According to some embodiments of the present invention, the first wall portion is configured as a top wall of the heat exchange shell, the second wall portion is configured as a bottom wall of the heat exchange shell, and the water-absorbing gel plate abuts against the second wall portion.

[0007] According to some embodiments of the present invention, the cooling device also includes: a water supply plate, which is arranged in the installation cavity, the water supply plate and the water absorbent gel plate are in contact with each other, a guide groove is formed on the surface of the water supply plate facing the water absorbent gel plate, a sintered capillary core is formed on the inner surface of the guide groove, and the water supply plate and the water absorbent gel plate are both in contact with the second wall portion.

[0008] According to some embodiments of the present invention, the heat exchange shell has a third wall portion, which is connected between the first wall portion and the second wall portion to define an installation cavity, the solar photovoltaic panel abuts the third wall portion, the water-absorbing gel plate is located between the solar photovoltaic panel and the water supply plate, the guide groove extends to the end of the water supply plate facing the second wall portion, and the guide groove is arranged corresponding to the inlet of the installation cavity.

[0009] According to some embodiments of the present invention, the guide groove includes: a connected main guide groove and a branch guide groove, the main guide groove extends along the arrangement direction of the first wall portion and the second wall portion, one end of the branch guide groove is connected to the main guide groove, and an angle is formed between the branch guide groove and the main guide groove.

[0010] According to some embodiments of the present invention, the water-absorbing gel plate comprises: a foam metal skeleton and a water-absorbing gel layer, wherein the foam metal skeleton is embedded in the water-absorbing gel layer.

[0011] According to some embodiments of the present invention, a one-way flow limiting inclined plate is provided in the heat exchange flow path, and along the material flow direction in the heat exchange flow path, the upstream end of the one-way flow limiting inclined plate is fixedly connected to the heat exchange flow path, the one-way flow limiting inclined plate is inclined toward the heat exchange flow path, and the downstream end of the one-way flow limiting inclined plate is separated from the heat exchange flow path.

[0012] According to some embodiments of the present invention, the cooling device further comprises: an insulating blanket, which is disposed on the outer surface of the heat exchange shell and is formed with an assembly hole, and the solar photovoltaic panel is assembled in the assembly hole.

[0013] According to some embodiments of the present invention, the heat exchange flow path has a first heat exchange section for exchanging heat with the phase change material, and a first heat exchange fin is disposed on an outer surface of the first heat exchange section.

[0014] According to some embodiments of the present invention, the solar thermal energy storage system further includes: an energy release pipeline, which is arranged in the energy storage box and cooperates with the phase change material for heat exchange, and the energy release pipeline has a second heat exchange section for heat exchange with the phase change material, and the outer surface of the second heat exchange section is provided with a second heat exchange plate.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 is a schematic structural diagram of a solar thermal energy storage system according to an embodiment of the present invention;

[0018] Figure 2 yes Figure 1 Sectional view along AA;

[0019] Figure 3 yes Figure 2 An enlarged schematic diagram of the hydrogel plate at B in the middle;

[0020] Figure 4 yes Figure 2 Cross-sectional view along CC;

[0021] Figure 5 yes Figure 2 The enlarged schematic diagram at D in the middle;

[0022] Figure 6 yes Figure 2 The enlarged schematic diagram at E in the middle;

[0023] Figure 7 It is a schematic diagram of the layout of the heat exchange flow path and the energy release pipeline in the energy storage box of an embodiment of the present invention.

[0024] Reference numerals:

[0025] Solar thermal energy storage system 100;

[0026] Heat exchange flow path 10; one-way flow limiting inclined plate 11; upstream end 111; downstream end 112; first heat exchange section 12; first heat exchange fin 13;

[0027] Energy storage box 20; phase change material 21;

[0028] Solar photovoltaic panels 30;

[0029] Cooling device 40;

[0030] Heat exchange shell 41; first wall portion 411; second wall portion 412; installation cavity 413; installation cavity outlet 414; installation cavity inlet 415; steam space 416; third wall portion 417;

[0031] Water-absorbing gel plate 42; foam metal skeleton 421; water-absorbing gel layer 422;

[0032] Water delivery plate 43; guide groove 431; main guide groove 432; branch guide groove 433;

[0033] Insulating blanket 44; Assembly hole 441;

[0034] Energy release pipeline 50; second heat exchange section 51; second heat exchange fin 52. DETAILED DESCRIPTION

[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] Reference below Figure 1-Figure 7 The solar thermal energy storage system 100 according to an embodiment of the present invention includes: a heat exchange flow path 10 and an energy storage box 20, wherein a phase change material 21 is arranged in the energy storage box 20, and the heat exchange flow path 10 is arranged in the energy storage box 20 and cooperates with the phase change material 21 for heat exchange; a solar photovoltaic panel 30 and a cooling device 40, wherein the cooling device 40 includes a heat exchange shell 41 and a water-absorbing gel plate 42, wherein the solar photovoltaic panel 30 and the heat exchange shell 41 are in contact with each other, and the heat exchange shell 41 defines an installation cavity 413, and the heat exchange shell 41 has a first relative The first wall portion 411 and the second wall portion 412, the first wall portion 411 forms a mounting cavity outlet 414, the second wall portion 412 forms a mounting cavity inlet 415, both ends of the heat exchange flow path 10 are respectively connected to the mounting cavity outlet 414 and the mounting cavity inlet 415 to form a circulation flow path, the water-absorbing gel plate 42 is arranged in the mounting cavity 413 and abuts against the heat exchange shell 41, and the water-absorbing gel plate 42 is spaced apart from the first wall portion 411 to form a steam space 416 between the first wall portion 411 and the water-absorbing gel plate 42.

[0037] The energy storage box 20 is provided with a phase change material 21, which can be a mixture of paraffin, stearic acid, and hydrated sodium sulfate to make the phase change temperature 50±2°C. The phase change material 21 can absorb or release a large amount of heat when the material state changes. When the phase change material 21 changes from solid to liquid, it can absorb heat, thereby storing thermal energy. When the phase change material 21 changes from liquid to solid, it can release heat, thereby providing thermal energy. The heat exchange flow path 10 passes through the energy storage box 20 and cooperates with the phase change material 21 for heat exchange. For example, when the temperature of the fluid in the heat exchange flow path 10 is higher than the phase change temperature of the phase change material 21, the heat in the fluid will be transferred to the phase change material 21, causing the phase change material 21 to undergo a phase change and store heat. When the temperature of the fluid in the heat exchange flow path 10 is lower than the phase change temperature of the phase change material 21, the phase change material 21 will release the stored heat to the fluid, causing the temperature of the fluid in the heat exchange flow path 10 to increase. The present application is explained by taking the example that the temperature of the fluid in the heat exchange flow path 10 is higher than the phase change temperature of the phase change material 21, and the heat in the fluid will be transferred to the phase change material 21, causing the phase change material 21 to undergo a phase change and store heat.

[0038] The cooling device 40 includes a heat exchange shell 41 and a water-absorbing gel plate 42. The solar photovoltaic panel 30 is arranged outside the heat exchange shell 41. The solar photovoltaic panel 30 and the heat exchange shell 41 are abutted to transfer the heat generated by the solar photovoltaic panel 30 to the heat exchange shell 41, and then transfer the heat to the water-absorbing gel plate 42 in the heat exchange shell 41 through the heat exchange shell 41. The bound water in the water-absorbing gel plate 42 can absorb heat and evaporate, and then can cool the solar photovoltaic panel 30, thereby effectively improving the working environment of the solar photovoltaic panel 30 and improving the working efficiency of the solar photovoltaic panel 30.

[0039] The heat exchange shell 41 defines a mounting cavity 413, and the heat exchange shell 41 has a first wall portion 411 and a second wall portion 412 opposite to each other. Figure 2 As shown, taking the heat exchange shell 41 placed in the up and down direction as an example, the first wall portion 411 is located above the second wall portion 412, the first wall portion 411 forms an installation cavity outlet 414, and the second wall portion 412 forms an installation cavity inlet 415. The two ends of the heat exchange flow path 10 are respectively connected to the installation cavity outlet 414 and the installation cavity inlet 415 to form a circulation flow path. The water-absorbing gel plate 42 is arranged in the installation cavity 413 and abuts against the heat exchange shell 41, and the water-absorbing gel plate 42 and the solar photovoltaic panel 30 can be arranged correspondingly, so that the heat generated by the solar photovoltaic panel 30 can be quickly transferred to the water-absorbing gel plate 42. When the water-absorbing gel plate 42 absorbs the heat generated by the solar photovoltaic panel 30, the water-absorbing gel plate 42 can be used to absorb the heat generated by the solar photovoltaic panel 30. After the heat is absorbed, the bound water in the water-absorbing gel plate 42 can evaporate into steam, and the steam enters the heat exchange flow path 10 from the installation cavity outlet 414. The steam in the heat exchange flow path 10 is converted into condensed water after heat exchange with the phase change material 21 in the energy storage box 20. The condensed water enters the water-absorbing gel plate 42 from the installation cavity inlet 415 to form a circulation flow path to continuously cool the solar photovoltaic panel 30, so that the solar photovoltaic panel 30 can be in a working environment with a suitable temperature to improve the working efficiency of the solar photovoltaic panel 30, and the phase change material 21 in the energy storage box 20 can be used for heating indoors or other equipment, thereby improving the utilization rate of solar energy and being beneficial to energy conservation and emission reduction.

[0040] The water-absorbing gel plate 42 is spaced apart from the first wall portion 411 to form a steam space 416 between the first wall portion 411 and the water-absorbing gel plate 42, which facilitates the flow of steam. During the heat absorption and evaporation process of the water-absorbing gel plate 42, the air pressure in the steam space 416 gradually increases to encourage the steam to enter the heat exchange flow path 10 from the installation cavity outlet 414. The steam in the heat exchange flow path 10 is converted into condensed water after heat exchange with the phase change material 21 in the energy storage box 20, which also encourages the condensed water to flow from the heat exchange flow path 10 to the installation cavity inlet 415. The condensed water then enters the water-absorbing gel plate 42 from the installation cavity inlet 415, forming a circulating flow path to continuously cool the solar photovoltaic panel 30, thereby improving the cooling efficiency of the cooling device 40.

[0041] According to the solar thermal energy storage system 100 of the embodiment of the present invention, the water-absorbing gel plate 42 absorbs the heat of the solar photovoltaic panel 30, effectively improving the working environment of the solar photovoltaic panel 30 to improve the working efficiency of the solar photovoltaic panel 30, and the heat exchange between the heat exchange flow path 10 and the phase change material 21 can be stored in the energy storage box 20 and used for heating needs, thereby improving the utilization rate of solar energy and being beneficial to energy conservation and emission reduction.

[0042] According to some embodiments of the present invention, Figure 2 As shown, the first wall portion 411 is configured as the top wall of the heat exchange shell 41 , the second wall portion 412 is configured as the bottom wall of the heat exchange shell 41 , and the water-absorbing gel plate 42 abuts against the second wall portion 412 .

[0043] The first wall portion 411 is configured as the top wall of the heat exchange shell 41, and the second wall portion 412 is configured as the bottom wall of the heat exchange shell 41, so that the first wall portion 411 and the second wall portion 412 are opposite and spaced apart, and a mounting cavity 413 with sufficient space can be formed in the heat exchange shell 41 for mounting the water-absorbing gel plate 42, and the first wall portion 411 and the second wall portion 412 serve as the main supporting structure of the heat exchange shell 41, ensuring the overall stability and reliability of the cooling device 40. In addition, the first wall portion 411 is configured as the top wall of the heat exchange shell 41, and the second wall portion 412 is configured as the bottom wall of the heat exchange shell 41, so that the mounting cavity outlet 414 can be arranged above the mounting cavity inlet 415, so that the steam in the steam space 416 flows into the heat exchange flow path 10 from the mounting cavity outlet 414, and the liquid in the heat exchange flow path 10 flows into the mounting cavity 413 from the mounting cavity inlet 415 under the action of the gravity of the liquid in the heat exchange flow path 10.

[0044] The water-absorbing gel plate 42 abuts against the second wall portion 412 so that the second wall portion 412 supports the water-absorbing gel plate 42, thereby facilitating the water-absorbing gel plate 42 to maintain its original shape and size, thereby maintaining its water absorption, moisture retention and heat conduction properties.

[0045] Further, the bottom wall edge portion of the water-absorbing gel plate 42 and the edge portion of the upper surface of the second wall portion 412 can be fixedly connected by welding, or the bottom wall edge portion of the water-absorbing gel plate 42 and the edge portion of the upper surface of the second wall portion 412 can be fixedly connected by bonding, but the present invention is not limited thereto, and the bottom wall edge portion of the water-absorbing gel plate 42 and the edge portion of the upper surface of the second wall portion 412 can also be fixedly connected by other means, as long as the bottom wall edge portion of the water-absorbing gel plate 42 and the edge portion of the upper surface of the second wall portion 412 are fixedly connected. This application takes the example that the bottom wall edge portion of the water-absorbing gel plate 42 and the edge portion of the upper surface of the second wall portion 412 can be fixedly connected by welding. The welded connection has long-term stability and is not easily affected by environmental factors such as temperature and humidity, ensuring that the connection between the water-absorbing gel plate 42 and the second wall portion 412 will not change during long-term use, thereby improving the overall stability and reliability of the cooling device 40.

[0046] According to some embodiments of the present invention, Figure 2 As shown, the cooling device 40 also includes: a water conveying plate 43, which is arranged in the installation cavity 413, the water conveying plate 43 and the water-absorbing gel plate 42 are in contact with each other, a guide groove 431 is formed on the surface of the water conveying plate 43 facing the water-absorbing gel plate 42, a sintered capillary core is formed on the inner surface of the guide groove 431, and the water conveying plate 43 and the water-absorbing gel plate 42 are both in contact with the second wall portion 412.

[0047] The water conveying plate 43 can be made of metal materials, for example, the water conveying plate 43 can be made of metal materials such as copper and aluminum. The present application takes the water conveying plate 43 made of metal copper as an example for explanation. The water conveying plate 43 is arranged in the installation cavity 413, and the water conveying plate 43 and the water absorbing gel plate 42 are attached. For example, the water conveying plate 43 and the water absorbing gel plate 42 can be fixedly connected by welding, or the water conveying plate 43 and the water absorbing gel plate 42 can be fixedly connected by bonding, but the present invention is not limited thereto. The water conveying plate 43 and the water absorbing gel plate 42 can also be fixedly connected by other means, as long as the water conveying plate 43 and the water absorbing gel plate 42 are attached. The present application takes the example of the fixed connection between the water supply plate 43 and the water absorbent gel plate 42 by welding as an example. Specifically, the edge portions of the two opposite wall surfaces of the water absorbent gel plate 42 and the water supply plate 43 are connected by welding so that the water supply plate 43 and the water absorbent gel plate 42 fit together. This can ensure that the water supply plate 43 and the water absorbent gel plate 42 are firmly connected without affecting the normal use of the water supply plate 43 and the water absorbent gel plate 42, thereby improving the overall stability and reliability of the cooling device 40.

[0048] A guide groove 431 may be formed on the surface of the water conveying plate 43 facing the water absorbing gel plate 42. The steam formed by the heat absorption and evaporation of the water absorbing gel plate 42 may be concentrated in the steam space 416 along the guide groove 431, and the steam enters the heat exchange flow path 10 through the installation cavity outlet 414. The condensed water formed after the steam in the heat exchange flow path 10 exchanges heat with the phase change material 21 in the energy storage box 20 enters the guide groove 431 through the heat exchange flow path 10 and the installation cavity inlet 415. A sintered capillary core is formed on the inner surface of the guide groove 431. Under the action of the capillary force provided by the sintered capillary core and the osmotic pressure difference in the water absorbing gel plate 42, the condensed water can be spread over the guide groove 431 as much as possible, so that the water absorbing gel plate 42 can evenly reabsorb the condensed water in the guide groove 431 to form a circulation flow path, thereby continuously cooling the solar photovoltaic panel 30, and then the solar photovoltaic panel 30 can be placed in a working environment with a suitable temperature to improve the working efficiency of the solar photovoltaic panel 30.

[0049] The water conveying plate 43 and the water absorbing gel plate 42 are both in contact with the second wall portion 412, so that the heat exchange shell 41 supports the water conveying plate 43 and the water absorbing gel plate 42, ensuring the stability and reliability of the water conveying plate 43 and the water absorbing gel plate 42 during operation, helping to prevent displacement or deformation of components caused by vibration or temperature changes, and making it easier to position the water conveying plate 43 and the water absorbing gel plate 42, so that it is easier to correspond and align the water conveying plate 43 and the water absorbing gel plate 42, so that steam and condensed water can flow smoothly between the water conveying plate 43 and the water absorbing gel plate 42, thereby improving the cooling efficiency of the cooling device 40.

[0050] According to some embodiments of the present invention, Figure 2 As shown, the heat exchange shell 41 has a third wall portion 417, and the third wall portion 417 is connected between the first wall portion 411 and the second wall portion 412 to define an installation cavity 413. The solar photovoltaic panel 30 abuts against the third wall portion 417, and the water-absorbing gel plate 42 is located between the solar photovoltaic panel 30 and the water conveying plate 43. The guide groove 431 extends to the end of the water conveying plate 43 facing the second wall portion 412, and the guide groove 431 is arranged corresponding to the installation cavity inlet 415.

[0051] Among them, the third wall portion 417 is connected between the first wall portion 411 and the second wall portion 412 to define the installation cavity 413. The third wall portion 417 and the first wall portion 411 and the second wall portion 412 can be fixedly connected by welding, or the third wall portion 417, the first wall portion 411, and the second wall portion 412 can be integrally formed, but the present invention is not limited to this. The third wall portion 417 and the first wall portion 411 and the second wall portion 412 can also be connected by other means, as long as the third wall portion 417 is connected between the first wall portion 411 and the second wall portion 412 to define the installation cavity 413.

[0052] The solar photovoltaic panel 30 is in contact with the third wall 417, so that the solar photovoltaic panel 30 can exchange heat with the heat exchange shell 41. The water-absorbing gel plate 42 is located between the solar photovoltaic panel 30 and the water conveying plate 43, so that the water-absorbing gel plate 42 absorbs the heat of the solar photovoltaic panel 30 and evaporates to generate steam. The steam can flow into the steam space 416 through the water-absorbing gel plate 42, and the steam can enter the guide groove 431 of the water conveying plate 43 and flow to the steam space 416 along the guide groove 431. In addition, the water-absorbing gel plate 42 is located between the solar photovoltaic panel 30 and the water conveying plate 43, which is conducive to the water-absorbing gel plate 42 maintaining its original shape and size, thereby maintaining its water absorption, moisture retention and heat conduction properties. The guide groove 431 extends to the end of the water conveying plate 43 facing the second wall portion 412. The guide groove 431 is arranged corresponding to the installation cavity inlet 415, so that the condensed water in the heat exchange flow path 10 can enter the guide groove 431 from the installation cavity inlet 415, and then evenly enter the water-absorbing gel plate 42, so that the water-absorbing gel plate 42 can reabsorb the condensed water more evenly, so that the water-absorbing gel plate 42 can evenly absorb the heat of the solar photovoltaic panel 30, avoid local overheating of the solar photovoltaic panel 30, and thus improve the stability and working efficiency of the solar photovoltaic panel 30.

[0053] According to some embodiments of the present invention, Figure 4 As shown, the guide groove 431 includes: a connected main guide groove 432 and a branch guide groove 433, the main guide groove 432 extends along the arrangement direction of the first wall portion 411 and the second wall portion 412, one end of the branch guide groove 433 is connected to the main guide groove 432, and an angle is formed between the branch guide groove 433 and the main guide groove 432.

[0054] Among them, the main flow groove 432 extends along the arrangement direction of the first wall portion 411 and the second wall portion 412, and a sintered capillary core is formed on the inner surface of the guide groove 431. The capillary force provided by the sintered capillary core can guide the condensed water in the main flow groove 432 toward the direction of the first wall portion 411, and one end of the branch guide groove 433 is connected to the main flow groove 432, and an angle is formed between the branch guide groove 433 and the main flow groove 432, which can change the flow direction of the condensed water so that the condensed water can be more widely distributed on the wall surface of the water conveying plate 43 facing the water-absorbing gel plate 42, so that the water-absorbing gel plate 42 quickly and evenly absorbs and retains a large amount of water, thereby realizing the collection and directional flow of the condensed water, and ensuring that the condensed water can be fully absorbed and stored.

[0055] It can be explained that the opening direction and angle of the angle formed between the branch guide groove 433 and the main guide groove 432 can be reasonably set according to actual conditions. This application takes the angle formed between the branch guide groove 433 and the main guide groove 432 opening toward the second wall portion 412 as an example for explanation.

[0056] According to some embodiments of the present invention, Figure 3 As shown, the water-absorbing gel plate 42 includes a foam metal skeleton 421 and a water-absorbing gel layer 422 , wherein the foam metal skeleton 421 is embedded in the water-absorbing gel layer 422 .

[0057] Among them, the foam metal skeleton 421 can be made of a metal material with good thermal conductivity, such as foam copper, foam aluminum, etc. This application takes the foam metal skeleton 421 made of foam copper material as an example for explanation. The water-absorbing gel layer 422 can be made of acrylamide material, and 45% mass fraction of lithium bromide can be selected as a hygroscopic solution. The foam metal skeleton 421 is embedded in the water-absorbing gel layer 422, which can provide strength and stability for the water-absorbing gel layer 422. Since the water-absorbing gel layer 422 is soft and easy to deform, the embedding of the foam metal skeleton 421 can effectively reduce the excessive deformation of the water-absorbing gel layer 422 when absorbing water or being pressed, thereby maintaining the overall shape and dimensional stability of the water-absorbing gel plate 42, so that the water-absorbing gel plate 42 has higher reliability and durability, thereby effectively extending the service life of the water-absorbing gel plate 42.

[0058] In addition, the foam metal skeleton 421 has good thermal conductivity and can transfer heat to the water-absorbing gel layer 422 more effectively. The porous structure of the foam metal skeleton 421 also helps the steam and condensed water to flow smoothly in the water-absorbing gel plate 42, thereby helping the steam to flow from the water-absorbing gel plate 42 into the water conveying plate 43, and also helps the water-absorbing gel plate 42 to capture condensed water from the water conveying plate 43. The water-absorbing gel layer 422 can absorb and store condensed water. The embedding of the foam metal skeleton 421 not only does not affect the water absorption capacity of the water-absorbing gel layer 422, but also promotes the penetration and diffusion of condensed water by providing a larger surface area and pores, thereby making the distribution of condensed water in the water-absorbing gel layer 422 more uniform, so as to enhance the cooling effect of the water-absorbing gel plate 42.

[0059] Furthermore, the manufacturing method of the water-absorbing gel sheet 42 may be:

[0060] Step 1: Add 60 mL of deionized water to a beaker, then add 0.0092 g of N,N'methylenebisacrylamide and 0.027 g of 2-hydroxy-4'-(2-hydroxyethoxy)2-methylpropiophenone. Then heat and stir evenly to 90°C under a magnetic machine.

[0061] Step 2: When the magnetic machine is stirring evenly and the temperature is above 90°C, add 0.445g of agarose and continue stirring until no particles are visible in the solution.

[0062] Step three, prepare a metal mold with the same length and width as the solar photovoltaic panel 30 (this size varies with the component structure) and a thickness of 1.5 mm, and put a foam copper plate with the same length and width as the solar photovoltaic panel 30 and a thickness of 1.5 mm into the mold.

[0063] Step 4: When no particles are visible under the stirring of the magnetic machine and the solution becomes viscous, pour it into the mold and quickly put it in the refrigerator for 45-60 minutes.

[0064] Step 5, take out the mold, irradiate the water-absorbing gel plate 42 embedded with the foam metal skeleton 421 under ultraviolet light for 4 hours, and then put it into a heating table at 60° C. to dry until the water-absorbing gel layer 422 is completely dry.

[0065] Step 6: Place the dried water-absorbing gel sheet 42 into a lithium bromide solution with a mass fraction of 45% and let it stand for 2 hours. After wiping off the liquid on the surface, the water-absorbing gel sheet 42 is prepared.

[0066] However, the present invention is not limited thereto, and the preparation method of the water-absorbing gel plate 42 can also be reasonably improved according to actual conditions, as long as the working requirements of the water-absorbing gel plate 42 can be met.

[0067] According to some embodiments of the present invention, Figure 5 and Figure 6 As shown, a one-way flow limiting inclined plate 11 may be provided in the heat exchange flow path 10. Along the material flow direction in the heat exchange flow path 10, the upstream end 111 of the one-way flow limiting inclined plate 11 is fixedly connected to the heat exchange flow path 10, the one-way flow limiting inclined plate 11 is inclined toward the heat exchange flow path 10, and the downstream end 112 of the one-way flow limiting inclined plate 11 is separated from the heat exchange flow path 10.

[0068] Among them, a one-way flow limiting inclined plate 11 may be provided in the heat exchange flow path 10, and the one-way flow limiting inclined plate 11 may be made of metal materials, such as copper, aluminum and other metal materials. In this application, the one-way flow limiting inclined plate 11 is made of metal copper material, and the heat exchange flow path 10 may also be made of metal materials, such as copper, aluminum and other metal materials. In this application, the heat exchange flow path 10 is made of metal copper material. Along the material flow direction in the heat exchange flow path 10, the upstream end 111 of the one-way flow limiting inclined plate 11 is fixedly connected to the heat exchange flow path 10, for example, the one-way flow limiting inclined plate 11 and the inner wall of the heat exchange flow path 10 can be fixedly connected by welding, or the one-way flow limiting inclined plate 11 and the heat exchange flow path 10 can be integrally formed, but the present invention is not limited thereto, and the one-way flow limiting inclined plate 11 and the inner wall of the heat exchange flow path 10 can also be fixedly connected by other means, as long as the upstream end 111 of the one-way flow limiting inclined plate 11 is fixedly connected to the heat exchange flow path 10. The one-way flow limiting inclined plate 11 is inclined toward the heat exchange flow path 10, and the downstream end 112 of the one-way flow limiting inclined plate 11 is spaced from the heat exchange flow path 10 to guide the fluid in the heat exchange flow path 10 to flow from the upstream end 111 of the one-way flow limiting inclined plate 11 to the downstream end 112 of the one-way flow limiting inclined plate 11, and also greatly increases the resistance of the fluid in the heat exchange flow path 10 to flow from the downstream end 112 of the one-way flow limiting inclined plate 11 to the upstream end 111 of the one-way flow limiting inclined plate 11, so that the fluid in the heat exchange flow path 10 can be driven from the upstream end to the downstream end by the pressure difference generated by the heat absorption and evaporation of the water-absorbing gel layer 422 and the thermal expansion of the steam without external drive, so as to achieve the effect of directional circulation of the fluid in the heat exchange flow path 10 (such as Figure 1 Clockwise flow in the heat exchange flow path 10) can not only reduce the structural complexity of the solar thermal energy storage system 100, but also reduce the manufacturing cost of the solar thermal energy storage system 100, and can effectively limit the backflow of the fluid in the heat exchange flow path 10, thereby avoiding damage to the solar thermal energy storage system 100.

[0069] According to some embodiments of the present invention, Figure 2 As shown, the cooling device 40 further includes: a heat-insulating blanket 44 , which is disposed on the outer surface of the heat exchange shell 41 and is formed with an assembly hole 441 , and the solar photovoltaic panel 30 is assembled in the assembly hole 441 .

[0070] The heat-insulating cladding 44 is usually made of a material with high thermal resistance, such as glass fiber, rock wool or aerogel, etc. These materials can effectively isolate heat transfer, so that the heat-insulating cladding 44 can reduce the loss of heat and the influence of the external environment on the cooling effect of the cooling device 40, thereby maintaining the temperature difference between the inside of the cooling device 40 and the outside. The heat-insulating cladding 44 is arranged on the outer surface of the heat exchange shell 41 and is formed with an assembly hole 441. The solar photovoltaic panel 30 is assembled in the assembly hole 441 to ensure that the solar photovoltaic panel 30 does not interfere with the heat insulation effect of the heat-insulating cladding 44. The outer surface of the solar photovoltaic panel 30 can perform photovoltaic action. The wall surface of the solar photovoltaic panel 30 that is in contact with the heat exchange shell 41 can exchange heat with the water-absorbing gel plate 42 in the heat exchange shell 41, thereby cooling the solar photovoltaic panel 30, so that the solar photovoltaic panel 30 is at a suitable working temperature, thereby improving the working efficiency of the solar photovoltaic panel 30.

[0071] According to some embodiments of the present invention, Figure 7 As shown, the heat exchange path 10 has a first heat exchange section 12 for exchanging heat with the phase change material 21. The first heat exchange section 12 can be constructed in a spiral shape, which can increase the length of the heat exchange path 10 to increase the heat exchange area between the heat exchange path 10 and the phase change material 21. The outer surface of the first heat exchange section 12 is provided with a first heat exchange plate 13, which can further increase the heat exchange area between the heat exchange path 10 and the phase change material 21, thereby improving the heat exchange efficiency, and further significantly reducing the time required for heat exchange, so as to improve the energy efficiency of the solar thermal energy storage system 100.

[0072] According to some embodiments of the present invention, Figure 7 As shown, the solar thermal energy storage system 100 also includes: an energy release pipeline 50, which is arranged in the energy storage box 20 and cooperates with the phase change material 21 for heat exchange, and the energy release pipeline 50 has a second heat exchange section 51 for heat exchange with the phase change material 21, and the outer surface of the second heat exchange section 51 is provided with a second heat exchange plate 52.

[0073] Among them, the energy release pipeline 50 is arranged through the energy storage box 20 and cooperates with the phase change material 21 for heat exchange. For example, when it is necessary to heat the room or other equipment, the heat stored in the phase change material 21 can be transported to the room or other equipment through the energy release pipeline 50. The energy release pipeline 50 has a second heat exchange section 51 for heat exchange with the phase change material 21. The second heat exchange section 51 can be constructed in a spiral shape, which can increase the length of the energy release pipeline 50 to increase the heat exchange area between the energy release pipeline 50 and the phase change material 21, and the outer surface of the second heat exchange section 51 is provided with a second heat exchange plate 52, which can further increase the heat exchange area between the energy release pipeline 50 and the phase change material 21, thereby improving the heat exchange efficiency, and further significantly reducing the time required for heat exchange, so as to improve the energy efficiency of the solar thermal energy storage system 100.

[0074] Furthermore, the first heat exchange section 12 and the second heat exchange section 51 can be arranged in a double helix cross shape, which can improve the structural stability of the first heat exchange section 12 and the second heat exchange section 51 while reducing the space occupancy rate of the first heat exchange section 12 and the second heat exchange section 51. The double-pipe countercurrent structure of the first heat exchange section 12 and the second heat exchange section 51 has a higher average logarithmic temperature drop during the heat exchange process, and the first heat exchange plate 13 and the second heat exchange plate 52 can be arranged in a DNA base pair shape, which can effectively increase the heat exchange area of ​​the first heat exchange section 12 and the second heat exchange section 51, thereby ensuring that the phase change material 21 can maintain a higher melting rate when storing energy, and can also ensure that the phase change material 21 can achieve a higher regeneration rate when releasing energy, thereby improving the energy efficiency of the solar thermal energy storage system 100.

[0075] The solar photovoltaic panel 30 absorbs the sun's radiation energy, wherein the radiation energy of high-frequency light waves can be used to generate electricity, while the radiation energy of low-frequency light waves cannot be absorbed by the solar photovoltaic panel 30 and is dissipated in the form of heat, thereby increasing the temperature of the solar photovoltaic panel 30. The temperature increase will reduce the power conversion efficiency of the solar photovoltaic panel 30.

[0076] The working principle of the solar thermal energy storage system 100 is as follows: the water-absorbing gel plate 42 absorbs the heat of the solar photovoltaic panel 30 and makes the water in the water-absorbing gel layer 422 evaporate into steam, the steam is concentrated into the steam space 416 along the guide groove 431 of the water conveying plate 43, and the steam enters the heat exchange flow path 10 through the installation cavity outlet 414, the steam in the heat exchange flow path 10 exchanges heat with the phase change material 21 in the energy storage box 20 to form condensed water, and the condensed water is generated by the limiting effect of the one-way flow limiting inclined plate 11 in the heat exchange flow path 10, the heat absorption and evaporation of the water-absorbing gel layer 422, and the thermal expansion of the steam. The pressure difference can self-drive the condensed water through the heat exchange flow path 10 and the installation cavity inlet 415 into the guide groove 431. A sintered capillary core is formed on the inner surface of the guide groove 431. The capillary force provided by the sintered capillary core and the osmotic pressure difference in the water-absorbing gel plate 42 can make the water-absorbing gel plate 42 reabsorb the condensed water to form a directional circulation flow path, so as to continuously cool the solar photovoltaic panel 30, and then the solar photovoltaic panel 30 can be placed in a working environment with a suitable temperature, so as to improve the working efficiency and conversion efficiency of the solar photovoltaic panel 30.

[0077] In addition, the heat of the solar photovoltaic panel 30 can be stored in the energy storage box 20 through heat exchange between the phase change material 21 and the heat exchange flow path 10. The phase change material 21 can also exchange heat with the energy release pipeline 50 to use the stored heat for indoor or other equipment that requires heating, thereby improving the utilization rate of solar energy and is also beneficial to energy conservation and emission reduction.

[0078] The solar thermal energy storage system 100 of the present application realizes zero-energy self-driving operation of the heat exchange flow path 10, avoids the need for an external driving mechanism, improves the working efficiency and conversion efficiency of the solar photovoltaic panel 30, improves the utilization rate of solar energy, and is also conducive to energy conservation and emission reduction.

[0079] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0080] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A solar thermal energy storage system, characterized in that: include: A heat exchange flow path and an energy storage box, wherein a phase change material is arranged in the energy storage box, and the heat exchange flow path passes through the energy storage box and cooperates with the phase change material for heat exchange; A solar photovoltaic panel and a cooling device, wherein the cooling device comprises a heat exchange shell and a water-absorbing gel plate, wherein the solar photovoltaic panel and the heat exchange shell are in abutment with each other, wherein the heat exchange shell defines an installation cavity, wherein the heat exchange shell has a first wall portion and a second wall portion opposite to each other, wherein the first wall portion forms an installation cavity outlet, and the second wall portion forms an installation cavity inlet, wherein both ends of the heat exchange flow path are respectively connected to the installation cavity outlet and the installation cavity inlet to form a circulation flow path, wherein the water-absorbing gel plate is arranged in the installation cavity and in abutment with the heat exchange shell, and wherein the water-absorbing gel plate is spaced apart from the first wall portion to form a steam space between the first wall portion and the water-absorbing gel plate.

2. The solar thermal energy storage system according to claim 1, characterized in that: The first wall portion is configured as a top wall of the heat exchange shell, the second wall portion is configured as a bottom wall of the heat exchange shell, and the water-absorbing gel plate abuts against the second wall portion.

3. The solar thermal energy storage system according to claim 1, characterized in that: The cooling device further includes: a water conveying plate, which is arranged in the installation cavity, the water conveying plate and the water-absorbing gel plate are in contact with each other, a guide groove is formed on the surface of the water conveying plate facing the water-absorbing gel plate, a sintered capillary core is formed on the inner surface of the guide groove, and the water conveying plate and the water-absorbing gel plate are both in contact with the second wall portion.

4. The solar thermal energy storage system according to claim 3, characterized in that: The heat exchange shell has a third wall portion, which is connected between the first wall portion and the second wall portion to define the installation cavity, the solar photovoltaic panel abuts against the third wall portion, the water-absorbing gel plate is located between the solar photovoltaic panel and the water conveying plate, the guide groove extends to the end of the water conveying plate facing the second wall portion, and the guide groove is arranged corresponding to the inlet of the installation cavity.

5. The solar thermal energy storage system according to claim 3, characterized in that: The guide groove includes: a connected main guide groove and a branch guide groove, the main guide groove extends along the arrangement direction of the first wall portion and the second wall portion, one end of the branch guide groove is connected to the main guide groove, and an angle is formed between the branch guide groove and the main guide groove.

6. The solar thermal energy storage system according to any one of claims 1 to 5, characterized in that: The water-absorbing gel plate comprises a foam metal frame and a water-absorbing gel layer, wherein the foam metal frame is embedded in the water-absorbing gel layer.

7. The solar thermal energy storage system according to any one of claims 1 to 5, characterized in that: A one-way flow limiting inclined plate is provided in the heat exchange flow path. Along the material flow direction in the heat exchange flow path, the upstream end of the one-way flow limiting inclined plate is fixedly connected to the heat exchange flow path. The one-way flow limiting inclined plate is inclined toward the heat exchange flow path, and the downstream end of the one-way flow limiting inclined plate is separated from the heat exchange flow path.

8. The solar thermal energy storage system according to any one of claims 1 to 5, characterized in that: The cooling device further comprises: a heat-insulating blanket, which is arranged on the outer surface of the heat exchange shell and is formed with an assembly hole, and the solar photovoltaic panel is assembled in the assembly hole.

9. The solar thermal energy storage system according to any one of claims 1 to 5, characterized in that: The heat exchange flow path has a first heat exchange section for exchanging heat with the phase change material, and a first heat exchange fin is disposed on an outer surface of the first heat exchange section.

10. The solar thermal energy storage system according to any one of claims 1 to 5, characterized in that: Also includes: An energy release pipeline is provided through the energy storage box and cooperates with the phase change material for heat exchange. The energy release pipeline has a second heat exchange section for heat exchange with the phase change material, and a second heat exchange plate is provided on the outer surface of the second heat exchange section.

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