A thermochemical energy storage module and device

Abstract

This invention relates to the technical field of heat exchange, and more particularly to a thermochemical energy storage module and device, comprising a housing component; and a heat exchange component filled with a heat storage material disposed within the housing component, wherein the heat storage material is provided with at least one channel for a medium to pass through, and the heat storage material is charged or released when the medium passes through the channel. This thermochemical energy storage module and device can achieve heat exchange with a single module. A heating component electrically heats the calcium-based heat storage material, causing a chemical reaction to generate an intermediate substance, thus completing heat storage. When releasing heat, water vapor is introduced into the channel to react with the intermediate substance, generating heat storage material and simultaneously releasing heat. The released heat is carried away by the introduced water vapor, completing the heat release process.

Description

Technical Field

[0001] This invention relates to the field of heat exchange technology, and more particularly to a thermochemical energy storage module and device. Background Technology

[0002] my country's demand for thermal energy storage is rapidly increasing with the growth of renewable energy and energy modernization. In particular, thermal energy storage in solar thermal power generation projects is developing rapidly. Currently, several solar thermal power generation projects in my country have implemented thermal energy storage systems, and in the future, more thermal energy storage systems will be integrated with various energy projects.

[0003] Existing thermochemical thermal storage devices suffer from the following typical defects due to immature heat transfer and reactor structure design: unreasonable distribution of heat exchange tubes within the container makes efficient and uniform heat exchange difficult; and issues related to material properties and system integration hinder large-capacity thermal storage. Therefore, this invention provides a thermochemical energy storage module and device. Summary of the Invention

[0004] In view of the problems existing in the above-mentioned thermal storage devices, the present invention is proposed.

[0005] Therefore, one of the objectives of this invention is to provide a thermochemical energy storage module that facilitates a reasonable layout to improve heat exchange efficiency.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a thermochemical energy storage module, comprising,

[0007] Containing components; and,

[0008] A heat exchange component is filled with heat storage material in a housing component, and the heat storage material is provided with at least one channel for the medium to pass through, wherein the heat storage material is charged or released when the medium passes through the channel.

[0009] As a preferred embodiment of the thermochemical energy storage module of the present invention, the accommodating component is square and made of metal material, and its contents are provided with a accommodating space for filling thermal storage material.

[0010] In a preferred embodiment of the thermochemical energy storage module of the present invention, the heat storage material is filled in the accommodating space, and the heat storage material is calcium hydroxide or calcium oxide.

[0011] As a preferred embodiment of the thermochemical energy storage module of the present invention, a ventilation pipe is embedded in the heat storage material, the interior of the ventilation pipe is a channel for medium flow, and the ventilation pipe is provided with pores communicating with the heat storage material.

[0012] In a preferred embodiment of the thermochemical energy storage module of the present invention, the ventilation pipe is U-shaped, the end of the ventilation pipe extends beyond the receiving component, and both ends are provided with insulating flanges.

[0013] As a preferred embodiment of the thermochemical energy storage module of the present invention, wherein: a temperature probe blind tube is embedded in the thermal storage material, and a temperature sensor is provided in the temperature probe blind tube.

[0014] In a preferred embodiment of the thermochemical energy storage module of the present invention, heat-conducting fins are provided on the outer side of the ventilation pipe, and the heat-conducting fins are spirally arranged on the ventilation pipe.

[0015] The beneficial effects of this thermochemical energy storage module are as follows: a single module can achieve heat exchange. By heating to a specified temperature using electric heating, the heat storage material undergoes a chemical reaction to generate intermediate substances, thus completing heat storage. When releasing heat, water vapor is introduced into the channel to react with the intermediate substances to generate heat storage material, while simultaneously releasing heat. The released heat is carried away by the unreacted water vapor introduced, completing the heat release process.

[0016] Another objective of this invention is to provide a thermochemical energy storage module that facilitates a reasonable layout to improve heat exchange efficiency.

[0017] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an energy storage device, including a thermochemical energy storage module, and further comprising;

[0018] The mounting components include multiple support spaces for the insertion of the thermochemical energy storage module; and...

[0019] The heating component controls the temperature of the thermochemical energy storage module inside the carrying space through electric heating. The electric heating circuit is connected to the heat exchange component, and multiple circuits are connected in series.

[0020] In a preferred embodiment of the energy storage device of the present invention, the installation component includes an installation shell, the installation shell is provided with a plurality of support structures, and the space between adjacent support structures and between the support structures and the inner wall of the shell is provided as a bearing space.

[0021] In a preferred embodiment of the energy storage device of the present invention, the heating component includes insulating ceramic sheets disposed at the bottom of the receiving component and at the end face of the insulating flange.

[0022] The beneficial effects of this invention are: multiple carrying spaces can accommodate multiple thermochemical energy storage modules, the thermochemical energy storage modules can be assembled, and multiple thermochemical energy storage modules can be connected in series and parallel to improve heat exchange capacity. The thermochemical energy storage modules can be rationally combined and installed to improve heat exchange efficiency and heat storage capacity. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of the energy storage device of the present invention.

[0025] Figure 2 This is a schematic diagram of the overall structure of the thermochemical energy storage module of the present invention.

[0026] Figure 3 This is a schematic diagram of the ventilation pipe structure of the thermochemical energy storage module of the present invention.

[0027] Figure 4 This is a schematic diagram of the installation structure of the energy storage device of the present invention.

[0028] Figure 5 This is a schematic diagram of multiple ventilation pipes in the energy storage device of the present invention. Detailed Implementation

[0029] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0032] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include the three-dimensional spatial dimensions of length, width, and depth.

[0033] Example 1, referring to Figure 2The first embodiment of the present invention provides a thermochemical energy storage module, including a housing component 100, a heat exchange component 200, and a heating component 400.

[0034] The heat exchange component 200 includes a heat storage material 201 filled in the housing component 100, and the heat storage material 201 is provided with at least one channel 202 for the medium to pass through, wherein the heat storage material 201 is charged or released when the medium passes through the channel 202.

[0035] The housing component 100 is square and made of metal. It has a housing space for filling the heat storage material 201, and the heat storage material 201 is calcium hydroxide.

[0036] When the heating component 400 heats the heat storage material 201, the calcium hydroxide absorbs heat and undergoes a chemical reaction to generate calcium oxide and water vapor. The water vapor flows away through the channel 202. At this time, the thermochemical energy storage module can store heat.

[0037] When the heat storage material 201 in the thermochemical energy storage module is calcium oxide, when water vapor passes through the channel 202, the water vapor reacts with the calcium oxide to generate calcium hydroxide and release heat. The heat is discharged with the unreacted water vapor, thus completing the heat release.

[0038] The multiple channels 202 in the thermal storage material 201 can increase the efficiency of thermal storage or heat release.

[0039] During use, heat storage or heat release is achieved depending on the composition of the heat storage material 201. When the heat storage material 201 is calcium hydroxide, the heating component 400 can electrically heat the calcium hydroxide to generate calcium oxide through an endothermic reaction, thus completing heat storage. When the heat storage material 201 is calcium oxide, water vapor is introduced to contact the calcium oxide, which can then react to generate calcium hydroxide. The heat generated is carried away by the water vapor, thus completing heat release.

[0040] Furthermore, thermal storage materials can be made from compounds based on metal hydroxide systems and compounds based on metal carbonate systems;

[0041] The metal hydroxide system includes systems such as Ca(OH)2 / CaO, Mg(OH)2 / MgO, Ba(OH)2 / BaO, and Sr(OH)2 / SrO. This system stores heat through the endothermic decomposition of metal hydroxide at high temperatures and releases heat through the reaction of water vapor and metal oxides to generate metal hydroxide.

[0042] The metal carbonate system includes systems such as CaCO3 / CaO, PbCO3 / PbO, and BaCO3 / BaO. Similar to metal hydroxides, this system achieves heat storage and release through the decomposition and formation of metal carbonates.

[0043] Example 2, refer to Figure 2 and Figure 3 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that a ventilation pipe 202a is embedded in the heat storage material 201. The interior of the ventilation pipe 202a is a medium flow channel 202, and the ventilation pipe 202a is provided with an air hole 202b that communicates with the heat storage material 201.

[0044] Ventilation pipe 202a supplies water vapor for circulation, while vent 202b facilitates contact between water vapor and heat storage material 201. When heat storage material 201 is calcium oxide, it can release heat.

[0045] The heat storage material 201 is provided with multiple ventilation pipes 202a, and the ventilation pipes 202a can be connected by flanges and hoses to increase the length of the ventilation pipes 202a, increase the movement distance of water vapor, and improve the heat storage or heat release capacity.

[0046] Meanwhile, the ventilation pipes 202a are not connected, and multiple ventilation pipes 202a can simultaneously introduce steam for heat exchange or heat release. Different steam introduction methods can be selected according to different working conditions.

[0047] Furthermore, the ventilation duct 202a is U-shaped, with its end extending beyond the receiving component 100, and both ends are equipped with insulating flanges 202c. The U-shaped ventilation duct 202a design allows the insulating flanges 202c to be located at the same end, with the inlet and outlet ends on the same side. It also facilitates construction when the ventilation ducts 202a are connected in parallel, as construction can be carried out only at the same end.

[0048] Furthermore, a temperature sensing blind tube 203 is embedded in the thermal storage material 201, and a temperature sensor 204 is installed in the temperature sensing blind tube 203. Multiple temperature sensing blind tubes 203 can be installed in the thermal storage material 201, and the temperature of the thermal storage material 201 is monitored by the temperature sensor 204 in the temperature sensing blind tube 203. Preferably, the temperature sensing blind tube 203 is located in the middle of the U-shaped ventilation pipe 202a.

[0049] Furthermore, the outer side of the ventilation duct 202a is provided with heat-conducting fins 202d, which are spirally arranged on the ventilation duct 202a. The heat-conducting fins 202d on the outer side of the ventilation duct 202a can improve the heat transfer performance. At the same time, the threaded shape of the heat-conducting fins 202d can increase the heat transfer contact area. The threaded shape of the heat-conducting fins 202d is convenient to install on the ventilation duct 202a. Only one welding is needed to complete the installation and fixation of the heat-conducting fins 202d of the entire duct.

[0050] The remaining structure is the same as that in Example 1.

[0051] During use, heat storage or heat release is achieved depending on the composition of the heat storage material 201. When the heat storage material 201 is calcium hydroxide, the heating component 400 heats it, causing the calcium hydroxide to absorb heat and react to generate calcium oxide, thus completing heat storage. When the heat storage material 201 is calcium oxide, excess water vapor is introduced into the ventilation pipe 202a to contact the calcium oxide, causing the calcium oxide to react and generate calcium hydroxide. The heat generated is carried away by the water vapor, thus completing heat release.

[0052] Example 3, referring to Figures 1-5 The third embodiment of the present invention provides an energy storage device, which includes a thermochemical energy storage module, an installation component 300, and a heating component 400.

[0053] The installation component 300 includes multiple thermochemical energy storage modules that can be plugged into the space. The thermochemical energy storage modules are generally square and can be plugged into the space inside the installation component 300.

[0054] Furthermore, the mounting assembly 300 includes a mounting housing 301, in which a plurality of support structures 302 are provided. The space between adjacent support structures 302 and between the support structures 302 and the inner wall of the housing is provided as a bearing space. The thermochemical energy storage module is placed in the bearing space and supported by the support structures 302. The mounting assembly 300 has vertical columns and horizontal columns, and each vertical column and horizontal column has at least one bearing space.

[0055] When installing the thermochemical energy storage module, simply plug the thermochemical energy storage module into the installation component 300. At the same time, multiple thermochemical energy storage modules can be connected to form a whole, increasing the heat storage or heat release capacity.

[0056] The heating component 400 controls the temperature of the thermochemical energy storage module inside the carrying space through electric heating. The electric heating circuit is connected to the housing component 100, and multiple circuits are connected in series. The total voltage is maintained at 36V, a safe voltage for the human body, to ensure safe production. The circuit is connected to the power supply equipment to heat the thermochemical energy storage module. Electric heating can raise the temperature of the environment to a suitable temperature for the heat storage reaction to occur.

[0057] Furthermore, the heating assembly 400 includes insulating ceramic sheets 401 disposed at the bottom of the receiving assembly 100 and at the end face of the insulating flange 202c. The insulating ceramic sheets 401 can ensure that unrelated structures are not heated, thus preventing heat loss.

[0058] Furthermore, such as Figure 5As shown, the ventilation pipes 202a in the multiple thermochemical energy storage modules are staggered, that is, no two adjacent sets of ventilation pipes 202a are in the same plane and are staggered relative to each other, which aims to improve the efficiency of heat transfer.

[0059] Usage process: By assembling the thermochemical energy storage modules in the installation component 300, the energy storage device is assembled according to the appropriate working conditions. The number of thermochemical energy storage modules can be customized. First, after connecting the multiple ventilation pipes 202a in a single thermochemical energy storage module, one air inlet and one air outlet are left. Then, the air inlets and outlets left in multiple thermochemical energy storage modules are connected to form a whole, thus completing the selection and installation of the energy storage device.

[0060] Then, the heating component 400 can heat the installation component 300 to increase the ambient temperature, so that it meets the chemical reaction in the thermochemical energy storage module. By passing water vapor through the ventilation pipe 202a and circulating it in multiple thermochemical energy storage modules, the function of heat storage or heat exchange is realized.

[0061] The remaining structure is the same as that in Example 2.

[0062] Compared with existing technologies, this invention adopts an innovative method of electric heating to heat the thermal storage material 201, employs a thermal storage drawer structure design, and utilizes independent thermochemical energy storage modules to improve heat exchange efficiency. It also provides the ability to combine multiple energy storage devices, offering a wider range of applications and a more rational heat exchange distribution. Furthermore, it incorporates structures such as insulating flanges 202c and insulating ceramic sheets 401 to prevent energy loss and improve energy storage efficiency. This makes the thermochemical energy storage device safer, more stable, and easier to maintain, ensuring the stability, safety, and high efficiency of the thermochemical thermal storage device during operation.

[0063] The product structure of this invention has a novel design, which solves the defects of existing thermochemical thermal storage devices, greatly increases the capacity of thermochemical thermal storage devices, reduces heat loss during the process, and improves the thermal storage efficiency of the device.

[0064] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely exemplary. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0065] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention) may be omitted.

[0066] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A thermochemical energy storage module, characterized in that: include, Accommodating component (100); and, A heat exchange assembly (200) is filled with heat storage material (201) in a housing assembly (100), and the heat storage material (201) is provided with at least one channel (202) for the medium to pass through, wherein the heat storage material (201) is charged or released when the medium passes through the channel (202); The receiving component (100) is square and made of metal, and its contents have a receiving space for filling the heat storage material (201). The heat storage material (201) is filled in the accommodating space, and the heat storage material (201) is calcium hydroxide or calcium oxide; A ventilation pipe (202a) is embedded in the heat storage material (201). The interior of the ventilation pipe (202a) is a channel (202) for medium flow, and the ventilation pipe (202a) is provided with a vent (202b) that communicates with the heat storage material (201). The ventilation duct (202a) is U-shaped, with its end extending beyond the receiving assembly (100), and both ends are provided with insulating flanges (202c). A temperature probe blind tube (203) is embedded in the heat storage material (201), and a temperature sensor (204) is installed in the temperature probe blind tube (203). The ventilation duct (202a) is provided with heat-conducting fins (202d) on the outside, and the heat-conducting fins (202d) are spirally arranged on the ventilation duct (202a); When the heat storage material (201) is calcium hydroxide, the heating component (400) can be electrically heated to make the calcium hydroxide absorb heat and react to generate calcium oxide, thus completing the heat storage. When the heat storage material (201) is calcium oxide, water vapor is introduced to contact with the calcium oxide, which can cause the calcium oxide to react and generate calcium hydroxide. The heat generated is carried away by the water vapor, thus completing the heat release.

2. A heat exchange device, characterized in that: Including the thermochemical energy storage module as described in claim 1, and further comprising: Installation component (300) includes multiple space-supporting space heating chemical energy storage module plug-in; as well as, The heating component (400) controls the temperature of the thermochemical energy storage module inside the carrying space through electric heating. The electric heating circuit is connected to the heat exchange component (200), and multiple circuits are connected in series.

3. The heat exchange device according to claim 2, characterized in that: The mounting assembly (300) includes a mounting housing (301), in which a plurality of support structures (302) are provided, and the space between adjacent support structures (302) and between the support structures (302) and the inner wall of the housing is provided as a load-bearing space.

4. The heat exchange device according to claim 3, characterized in that: The heating assembly (400) includes insulating ceramic sheets (401) disposed at the bottom of the receiving assembly (100) and at the end of the insulating flange (202c).

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