Thermochemical energy storage module and device

Abstract

The invention relates to the technical field of heat exchange, in particular to a thermochemical energy storage module and device. And the heat exchange assembly is filled with a heat storage material arranged in the containing assembly, at least one channel allowing a medium to penetrate through is further formed in the heat storage material, and the heat storage material of the heat exchange assembly conducts heat charging or heat releasing when the medium penetrates through the channel. According to the thermochemical energy storage module and device, heat exchange can be achieved through a single module, the calcium-based heat storage material is electrically heated through the heating assembly, a chemical reaction occurs to generate an intermediate substance, heat storage is completed, during heat release, water vapor is introduced into the channel and makes contact with the intermediate substance to react to generate a heat storage material, and meanwhile heat can be released; and the released heat is taken out by the introduced water vapor, so that the heat release process is completed.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange, and in particular to a thermochemical energy storage module and device. Background Art

[0002] The demand for heat storage in my country is rising rapidly with the growth of renewable energy and energy modernization. In particular, thermal energy storage in solar thermal power generation projects is developing rapidly. At present, many solar thermal power generation projects in my country have implemented heat storage systems, and in the future, more heat storage systems will be combined with various energy projects.

[0003] The existing thermochemical heat storage devices have the following typical defects due to the immaturity of heat transfer and reactor structure design: the heat exchange tubes are not reasonably distributed in the container, making it difficult to achieve efficient and uniform heat exchange; and due to problems such as material properties and system integration, it is difficult to achieve large-capacity heat storage. To this end, the present invention provides a thermochemical energy storage module and device. Summary of the invention

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

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

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a thermochemical energy storage module, comprising:

[0007] housing components; and,

[0008] The heat exchange component is filled with a heat storage material arranged in the containing component, and at least one channel for medium to pass through is also arranged in the heat storage material, and the heat storage material is charged or released when the medium passes through the channel.

[0009] As a preferred solution of the thermochemical energy storage module of the present invention, the containing component is set to be square and made of metal material, and has a containing space for filling with heat storage material.

[0010] As a preferred solution 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 solution of the thermochemical energy storage module of the present invention, a ventilation pipe is buried in the heat storage material, the interior of the ventilation pipe is a channel for medium circulation, and the ventilation pipe is provided with air holes connected to the heat storage material.

[0012] As a preferred solution of the thermochemical energy storage module of the present invention, the ventilation duct is U-shaped, the end of the ventilation duct exceeds the accommodating component, and insulating flanges are provided at both ends.

[0013] As a preferred solution of the thermochemical energy storage module of the present invention, a temperature detection blind tube is buried in the heat storage material, and a temperature sensor is provided in the temperature detection blind tube.

[0014] As a preferred solution of the thermochemical energy storage module of the present invention, heat-conducting fins are arranged on the outside of the ventilation duct, and the heat-conducting fins are spirally arranged on the ventilation duct.

[0015] The beneficial effects of this thermochemical energy storage module are as follows: a single module can achieve heat exchange. By using electric heating to heat to a specified temperature, the heat storage material undergoes a chemical reaction to generate an intermediate substance, thereby completing heat storage. When releasing heat, water vapor is passed into the channel to contact and react with the intermediate substance to generate a heat storage material, while releasing heat at the same time. The released heat is carried out by the water vapor that has not participated in the reaction, thereby completing the heat release process.

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

[0017] In order to solve the above technical problems, the present invention provides the following technical solutions: an energy storage device, including a thermochemical energy storage module, and further comprising;

[0018] An installation assembly comprising a plurality of bearing spaces for the thermochemical energy storage module to be plugged in; and

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

[0020] As a preferred solution of the energy storage device of the present invention, the installation assembly includes a mounting shell, a plurality of supporting structures are provided in the mounting shell, and bearing spaces are provided between adjacent supporting structures and between the supporting structures and the inner wall of the shell.

[0021] As a preferred solution of the energy storage device of the present invention, the heating component includes insulating ceramic sheets arranged at the bottom of the accommodating component and the end surface of the insulating flange.

[0022] The beneficial effects of the present invention are as follows: multiple bearing spaces can be used to install 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 in parallel to improve heat exchange capacity, and the thermochemical energy storage modules can be reasonably combined and installed to improve heat exchange efficiency and heat storage capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

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

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

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

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

[0028] Figure 5 Schematic diagram of multiple ventilation pipes of the energy storage device of the present invention DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present 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 term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0032] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0033] Example 1, reference Figure 2, which is the first embodiment of the present invention, provides a thermochemical energy storage module, including a containing 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 containing component 100, and at least one channel 202 for medium to pass through is also provided in the heat storage material 201, and the heat storage material 201 is charged with heat or releases heat when the medium passes through the channel 202.

[0035] The containing component 100 is square in shape and made of metal material, and contains a containing 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, and the water vapor flows away along 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, and the heat is discharged along with the unreacted water vapor to complete the heat release.

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

[0039] During use, heat storage or heat release is achieved according to the different components of the heat storage material 201. When the heat storage material 201 is calcium hydroxide, the heating component 400 performs electrical heating to make the calcium hydroxide absorb heat and react to generate calcium oxide, thereby completing heat storage. When the heat storage material 201 is calcium oxide, water vapor is introduced into contact with calcium oxide, thereby making the calcium oxide react to generate calcium hydroxide, and the generated heat is taken away by the water vapor, thereby completing heat release.

[0040] Furthermore, the heat storage material can be made of compounds of the metal hydroxide system and compounds of the metal carbonate system;

[0041] The metal hydroxide systems include Ca(OH)2 / CaO, Mg(OH)2 / MgO, Ba(OH)2 / BaO and Sr(OH)2 / SrO systems. The system stores heat through the endothermic decomposition of metal hydroxide at high temperature and releases heat through the reaction of water vapor and metal oxide to form metal hydroxide.

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

[0043] Example 2, reference Figure 2 and Figure 3 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: a ventilation pipe 202a is buried in the heat storage material 201, the interior of the ventilation pipe 202a is a channel 202 for medium circulation, and the ventilation pipe 202a is provided with an air hole 202b connected to the heat storage material 201.

[0044] The ventilation pipe 202a allows water vapor to circulate, while the air holes 202b facilitate the water vapor to contact with the heat storage material 201, so that heat can be released when the heat storage material 201 is calcium oxide.

[0045] A plurality of ventilation pipes 202a are provided in the heat storage material 201, and the ventilation pipes 202a can be connected with flanges and hoses to increase the length of the ventilation pipes 202a, increase the moving distance of water vapor, and improve the heat storage or heat release capacity.

[0046] At the same time, the ventilation pipes 202a are not connected, and water vapor can be introduced into multiple ventilation pipes 202a at the same time for heat exchange or heat release, and different water vapor introduction methods can be selected according to different working conditions.

[0047] Furthermore, the ventilation duct 202a is U-shaped, and the end of the ventilation duct 202a exceeds the containing component 100, and insulating flanges 202c are provided at both ends. The U-shaped ventilation duct 202a is set so that the insulating flange 202c is located at the same end, the air inlet end and the outlet end are on the same side, and the ventilation duct 202a is also convenient for construction when connected in parallel, and construction only needs to be carried out at the same end.

[0048] Furthermore, a temperature detection blind tube 203 is buried in the heat storage material 201, and a temperature sensor 204 is provided in the temperature detection blind tube 203, wherein a plurality of temperature detection blind tubes 203 may be provided in the heat storage material 201, and the temperature of the heat storage material 201 is monitored by the temperature sensor 204 in the temperature detection blind tube 203; wherein the preferred temperature detection blind tube 203 is arranged in the middle of the U-shaped ventilation duct 202a.

[0049] Furthermore, a heat-conducting fin 202d is provided on the outside of the ventilation duct 202a, and the heat-conducting fin 202d is spirally arranged on the ventilation duct 202a. The heat-conducting fin 202d is arranged on the outside of the ventilation duct 202a to improve the heat transfer performance. At the same time, the threaded heat-conducting fin 202d can increase the contact area of ​​heat transfer. The threaded heat-conducting fin 202d is easy to install on the ventilation duct 202a, and the installation and fixation of the heat-conducting fin 202d of the entire duct can be completed by welding at one place.

[0050] The remaining structures are the same as those of Example 1.

[0051] During use, heat storage or heat release is achieved according to the different components of the heat storage material 201. When the heat storage material 201 is calcium hydroxide, the heating component 400 is heated to make the calcium hydroxide react to generate calcium oxide, thereby 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, thereby making the calcium oxide react to generate calcium hydroxide, and the generated heat is taken away by the water vapor, thereby completing heat release.

[0052] Example 3, reference Figure 1-Figure 5 , which is a third embodiment of the present invention, provides an energy storage device, which includes a thermochemical energy storage module, a mounting component 300 and a heating component 400.

[0053] The installation component 300 includes a plurality of bearing spaces for plugging in the thermochemical energy storage module, wherein the thermochemical energy storage module is square in shape as a whole and can be plugged into the bearing space in the installation component 300 .

[0054] Furthermore, the installation component 300 includes an installation shell 301, in which a plurality of support structures 302 are provided. A bearing space is provided between adjacent support structures 302 and between the support structure 302 and the inner wall of the shell. The thermochemical energy storage module is placed in the bearing space and supported by the support structure 302. The installation component 300 is provided with vertical columns and horizontal columns, and each of the vertical columns and horizontal columns is provided with at least one bearing space.

[0055] When installing the thermochemical energy storage module, it is only necessary to plug the thermochemical energy storage module into the installation assembly 300. At the same time, multiple thermochemical energy storage modules can be connected to each other so that the multiple thermochemical energy storage modules are combined into a whole to increase the heat storage or heat release capacity.

[0056] Among them, 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 containing component 100, and multiple circuits are connected in series. The total voltage is maintained at a human safety voltage of 36V 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 environment temperature to a suitable temperature for the heat storage reaction to occur.

[0057] Furthermore, the heating component 400 includes insulating ceramic sheets 401 disposed at the bottom of the containing component 100 and the end surface of the insulating flange 202c, wherein the insulating ceramic sheets 401 can ensure that irrelevant structures are not heated and cause heat loss.

[0058] Further, such as Figure 5As shown, the ventilation pipes 202a in the multiple thermochemical energy storage modules are staggered, that is, two groups of ventilation pipes 202a adjacent to each other are not in the same plane, but are staggered relative to each other, in order to improve the efficiency of heat transfer.

[0059] Usage process: By assembling the thermochemical energy storage module in the installation assembly 300, the energy storage device is assembled according to the appropriate working conditions, and the number of thermochemical energy storage modules installed can be customized. First, after connecting multiple ventilation pipes 202a in a single thermochemical energy storage module, an air inlet and an air outlet are reserved, and then the air inlets and air outlets reserved in multiple thermochemical energy storage modules are connected, and multiple thermochemical energy storage modules are spliced ​​together to form a whole, and the selection and installation of the energy storage device are completed;

[0060] The installation component 300 can then be heated by the heating component 400 to increase the ambient temperature so that it satisfies the chemical reaction in the thermochemical energy storage module. The water vapor passes through the ventilation pipe 202a and circulates in multiple thermochemical energy storage modules to achieve the function of heat storage or heat exchange.

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

[0062] Compared with the prior art, the present invention adopts an innovative way of electric heating to heat the heat storage material 201, adopts the structural design of the heat storage drawer, and the independent thermochemical energy storage module can improve the heat exchange efficiency. At the same time, it provides the combination capability of multiple energy storage devices, has a wider range of adaptability, and a more reasonable heat exchange division. In addition, the insulating flange 202c, insulating ceramic sheet 401 and other structures are added to prevent energy loss and improve energy storage efficiency. The thermochemical energy storage device is safer and more stable, easy to maintain, and ensures the stability, safety and efficiency of the working process of the thermochemical heat storage device.

[0063] The product structure of the present invention is novel in design, which solves the defects of the existing thermochemical heat storage device, greatly improves the capacity of the thermochemical heat storage device, reduces the heat loss during the device process, and improves the heat storage efficiency of the device.

[0064] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0065] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0066] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A thermochemical energy storage module, characterized in that: include, a receiving assembly (100); and A heat exchange component (200) is filled with a heat storage material (201) arranged in a containing component (100), and at least one channel (202) for a medium to pass through is also arranged in the heat storage material (201), and the heat storage material (201) is charged with heat or releases heat when the medium passes through the channel (202).

2. The thermochemical energy storage module according to claim 1, characterized in that: The containing assembly (100) is in a square shape and is made of a metal material, and has a containing space therein for filling with the heat storage material (201).

3. The thermochemical energy storage module according to claim 2, characterized in that: The heat storage material (201) is filled in the accommodating space, and the heat storage material (201) is calcium hydroxide or calcium oxide.

4. The thermochemical energy storage module according to any one of claims 1 to 3, characterized in that: A ventilation pipe (202a) is buried in the heat storage material (201), the interior of the ventilation pipe (202a) is a channel (202) for medium circulation, and the ventilation pipe (202a) is provided with an air hole (202b) that is in communication with the heat storage material (201).

5. The thermochemical energy storage module according to claim 4, characterized in that: The ventilation duct (202a) is arranged in a U shape, an end of the ventilation duct (202a) exceeds the containing assembly (100), and insulating flanges (202c) are arranged at both ends.

6. The thermochemical energy storage module according to claim 5, characterized in that: A temperature detection blind tube (203) is buried in the heat storage material (201), and a temperature sensor (204) is provided in the temperature detection blind tube (203).

7. The thermochemical energy storage module according to claim 4, characterized in that: A heat-conducting fin (202d) is provided on the outside of the ventilation duct (202a), and the heat-conducting fin (202d) is spirally arranged on the ventilation duct (202a).

8. An energy storage device, characterized in that: The thermochemical energy storage module according to any one of claims 1 to 7 further comprises: An installation assembly (300) includes a plurality of bearing spaces for plugging in thermal chemical energy storage modules; as well as, The heating component (400) controls the temperature of the thermochemical energy storage module inside the bearing space by electric heating. The electric heating circuit is connected to the heat exchange component (200), and a plurality of circuits are connected in series.

9. The energy storage device according to claim 8, characterized in that: The mounting assembly (300) comprises a mounting shell (301), wherein a plurality of supporting structures (302) are arranged in the mounting shell (301), and bearing spaces are provided between adjacent supporting structures (302) and between the supporting structures (302) and the inner wall of the shell.

10. The energy storage device according to claim 8, characterized in that: The heating component (400) comprises insulating ceramic sheets (401) arranged at the bottom of the containing component (100) and at the end of the insulating flange (202c).

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