Heat supply system and method based on thermochemical energy storage and phase change energy storage

Abstract

The invention discloses a heat supply system and method based on thermochemical energy storage and phase change energy storage, an outlet of a water storage tank is divided into two paths after passing through a first water pump, one path is communicated with a pipe side inlet of a thermochemical reactor, the other path is communicated with an inlet of a heat exchanger, a pipe side outlet of the thermochemical reactor is divided into three paths, the first path is communicated with an inlet of the phase change heat storage unit, the second path is communicated with a shell side inlet of the thermochemical reactor, the third path is communicated with an inlet of the heat exchanger, a shell side outlet of the thermochemical reactor is communicated with an inlet of the ejector, an outlet of the water storage tank is communicated with an inlet of the ejector, and an outlet of the water storage tank is communicated with an outlet of the heat exchanger. An outlet of the ejector communicates with an inlet of the phase change heat storage unit, an outlet of the phase change heat storage unit communicates with an inlet of the heat exchanger, an outlet of the heat exchanger communicates with an inlet of the water storage tank, and the energy utilization efficiency of the system and method is high.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy storage, and relates to a heating system and method based on thermochemical energy storage and phase change energy storage. Background Art

[0002] A thermochemical reactor provides the necessary heat and reaction environment, allowing raw materials to undergo a chemical reaction under certain conditions to produce the desired product. The principle generally involves the transfer and utilization of thermal energy to accelerate or promote chemical reactions. Thermochemical energy storage is an important means of addressing the instability of photovoltaic and wind power generation. Thermochemical energy storage utilizes the bond energy of reversible chemical reactions to store thermal energy. When excess heat is available, endothermic chemical reactions proceed, absorbing the heat into the system, and the reaction products are separated and stored. When heat is needed, the reaction products recombine, releasing heat. Simply using thermochemical energy storage often results in low energy efficiency. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a heating system and method based on thermochemical energy storage and phase change energy storage, which has high energy utilization efficiency.

[0004] To achieve the above-mentioned object, the present invention discloses a heating system based on thermochemical energy storage and phase change energy storage, comprising a water storage tank, a first water pump, a thermochemical reactor, a heat exchanger, a phase change heat storage unit and an ejector;

[0005] The outlet of the water storage tank is divided into two paths after passing through the first water pump, one of which is connected to the tube side inlet of the thermochemical reactor, and the other is connected to the inlet of the heat exchanger. The tube side outlet of the thermochemical reactor is divided into three paths, among which the first path is connected to the inlet of the phase change heat storage unit, the second path is connected to the shell side inlet of the thermochemical reactor, and the third path is connected to the inlet of the heat exchanger. The shell side outlet of the thermochemical reactor is connected to the inlet of the ejector, the outlet of the water storage tank is connected to the inlet of the ejector, the outlet of the ejector is connected to the inlet of the phase change heat storage unit, the outlet of the phase change heat storage unit is connected to the inlet of the heat exchanger, and the outlet of the heat exchanger is connected to the inlet of the water storage tank.

[0006] Furthermore, the outlet of the first water pump is connected to the tube-side inlet of the thermochemical reactor via a first regulating valve.

[0007] Furthermore, the tube-side outlet of the thermochemical reactor is divided into three paths after passing through the first switch valve.

[0008] Furthermore, the tube-side outlet of the thermochemical reactor is connected to the shell-side inlet of the thermochemical reactor via a third regulating valve.

[0009] Furthermore, the tube-side outlet of the thermochemical reactor is connected to the inlet of the heat exchanger via a second regulating valve.

[0010] Furthermore, the outlet of the ejector is connected to the inlet of the phase change heat storage unit via a second switching valve.

[0011] Furthermore, the outlet of the water storage tank is connected to the inlet of the ejector via the second water pump.

[0012] Furthermore, the thermochemical reactor is provided with an electric heating device, and heat storage materials are arranged outside the tube side of the thermochemical reactor.

[0013] The present invention discloses a heating method based on thermochemical energy storage and phase change energy storage, comprising the following steps:

[0014] During the heat storage process, the electric heating device in the thermochemical reactor is started to decompose the heat storage medium and generate water vapor. The second water pump is started to use the second water pump to pump the feed water in the water storage tank through the ejector to eject the steam in the thermochemical reactor. The resulting mixed steam passes through the second switch valve and enters the phase change heat storage unit for heat exchange and cooling. The cooled hot water passes through the heat exchanger to supply heat to the outside to form cooling water, which is then returned to the water storage tank.

[0015] During the heat release process, the first water pump is started, the first regulating valve is opened, and part of the feed water output from the water storage tank is heated on the tube side of the thermochemical reactor and then enters the heat exchanger. The other part of the feed water output from the water storage tank enters the phase change heat storage unit for heat exchange and temperature increase to form steam, and then enters the tube side of the thermochemical reactor, where an exothermic reaction occurs.

[0016] The present invention discloses a heating method based on thermochemical energy storage and phase change energy storage, comprising the following steps:

[0017] During the heat storage process, the electric heating device in the thermochemical reactor is started to decompose the heat storage medium to generate water vapor. The second water pump is started to pump the feed water in the water storage tank through the ejector to eject the steam in the thermochemical reactor. The resulting mixed steam directly enters the heat exchanger through the second regulating valve to supply heat to the outside to form cooling water, which is then returned to the water storage tank.

[0018] During the heat release process, the first water pump is started, the first regulating valve is opened, and part of the feed water is heated through the tube side of the thermochemical reactor. The resulting hot water enters the heat exchanger, and the resulting steam enters the shell side of the thermochemical reactor through the third regulating valve to react with the reaction medium in an exothermic reaction. Another part of the feed water output from the water storage tank enters the phase change heat storage unit for heat exchange and temperature increase to form steam, which then enters the tube side of the thermochemical reactor.

[0019] The present invention has the following beneficial effects:

[0020] The heating system and method based on thermochemical energy storage and phase change energy storage described in the present invention are more controllable during specific operation based on the phase change energy storage process, high material energy storage density, and long energy storage cycle. They can meet the needs of heating or cooling and are suitable for thermal energy storage and release in different scenarios. At the same time, a phase change energy storage unit is introduced. During the heat storage process, a thermochemical reactor is used to absorb heat using the phase change energy storage unit. During the heat release process, the phase change energy storage unit is used to release heat to generate steam, which is then sent to the thermochemical reactor to improve energy utilization efficiency. The structure is simple and the practicability is extremely strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 It is a structural diagram of the present invention.

[0023] Among them, 1 is a water storage tank, 2 is the first water pump, 3 is the first regulating valve, 4 is a thermochemical reactor, 5 is the first switch valve, 6 is a heat exchanger, 7 is the second water pump, 8 is an ejector, 9 is the second switch valve, 10 is a phase change heat storage unit, 11 is the second regulating valve, and 12 is the third regulating valve. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0025] In the description of the present invention, it is to be understood that the terms “include” and “comprise” indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0026] It should also be understood that the terms used in the present specification are only for the purpose of describing particular embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0027] It should be further understood that the term "and / or" as used in the present specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects are in an "or" relationship.

[0028] It should be understood that although the terms "first," "second," and "third" may be used to describe preset ranges in embodiments of the present invention, these preset ranges should not be limited to these terms. These terms are merely used to distinguish one preset range from another. For example, without departing from the scope of embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0029] The word "if," as used herein, may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to the determination" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)," depending on the context.

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] The accompanying drawings illustrate various schematic diagrams of structures according to embodiments disclosed herein. These figures are not drawn to scale; for clarity, some details are exaggerated and some details may be omitted. The shapes of the various regions and layers shown in the figures, as well as their relative sizes and positional relationships, are merely exemplary and may deviate in practice due to manufacturing tolerances or technical limitations. Those skilled in the art may design regions / layers with different shapes, sizes, and relative positions as needed.

[0032] Example 1

[0033] refer to Figure 1 The heating system based on thermochemical energy storage and phase change energy storage described in the present invention includes a water storage tank 1, a first water pump 2, a thermochemical reactor 4, a heat exchanger 6, a phase change heat storage unit 10 and an ejector 8; the outlet of the water storage tank 1 is divided into two paths after passing through the first water pump 2, one of which is connected to the tube side inlet of the thermochemical reactor 4, and the other is connected to the inlet of the heat exchanger 6. The tube side outlet of the thermochemical reactor 4 is divided into three paths, among which the first path is connected to the inlet of the phase change heat storage unit 10, the second path is connected to the shell side inlet of the thermochemical reactor 4, and the third path is connected to the inlet of the heat exchanger 6. The shell side outlet of the thermochemical reactor 4 is connected to the inlet of the ejector 8, the outlet of the water storage tank 1 is connected to the inlet of the ejector 8, the outlet of the ejector 8 is connected to the inlet of the phase change heat storage unit 10, the outlet of the phase change heat storage unit 10 is connected to the inlet of the heat exchanger 6, and the outlet of the heat exchanger 6 is connected to the inlet of the water storage tank 1.

[0034] Example 2

[0035] refer to Figure 1 To further improve this application, the heating system based on thermochemical energy storage and phase change energy storage described in the present invention includes a water storage tank 1, a first water pump 2, a first regulating valve 3, a thermochemical reactor 4, a first switch valve 5, a heat exchanger 6, a second water pump 7, an ejector 8, a second switch valve 9, a phase change heat storage unit 10, a second regulating valve 11 and a third regulating valve 12;

[0036] The outlet of the water storage tank 1 is divided into two paths after passing through the first water pump 2, one of which is connected to the tube side inlet of the thermochemical reactor 4, and the other is connected to the inlet of the heat exchanger 6. The tube side outlet of the thermochemical reactor 4 is divided into three paths, among which the first path is connected to the inlet of the phase change heat storage unit 10, the second path is connected to the shell side inlet of the thermochemical reactor 4, and the third path is connected to the inlet of the heat exchanger 6. The shell side outlet of the thermochemical reactor 4 is connected to the inlet of the ejector 8, the outlet of the water storage tank 1 is connected to the inlet of the ejector 8, the outlet of the ejector 8 is connected to the inlet of the phase change heat storage unit 10, the outlet of the phase change heat storage unit 10 is connected to the inlet of the heat exchanger 6, and the outlet of the heat exchanger 6 is connected to the inlet of the water storage tank 1.

[0037] As an embodiment of the present invention, the outlet of the first water pump 2 is connected to the pipe-side inlet of the thermochemical reactor 4 via the first regulating valve 3 , and the amount of feed water entering the thermochemical reactor 4 is controlled by the first regulating valve 3 .

[0038] As an embodiment of the present invention, the tube-side outlet of the thermochemical reactor 4 is divided into three paths after passing through the first switch valve 5 .

[0039] As an embodiment of the present invention, the tube side outlet of the thermochemical reactor 4 is connected to the shell side inlet of the thermochemical reactor 4 through the third regulating valve 12, and the tube side outlet of the thermochemical reactor 4 is connected to the inlet of the heat exchanger 6 through the second regulating valve 11. The amount of the working fluid entering the shell side of the thermochemical reactor 4 is adjusted by the third regulating valve 12, and the amount of the working fluid entering the heat exchanger 6 is adjusted by the second regulating valve 11.

[0040] As an embodiment of the present invention, the outlet of the ejector 8 is connected to the inlet of the phase change heat storage unit 10 via the second switching valve 9 .

[0041] As an embodiment of the present invention, the outlet of the water storage tank 1 is connected to the inlet of the ejector 8 through the second water pump 7, and the feed water in the water storage tank 1 is sent into the ejector 8 through the second water pump 7.

[0042] As an embodiment of the present invention, the reaction medium in the thermochemical reactor 4 is a calcium hydroxide / calcium oxide or magnesium hydroxide / magnesium oxide system; the thermochemical reactor 4 is provided with an electric heating device, and a heat storage material is arranged outside the tube side of the thermochemical reactor 4.

[0043] As an embodiment of the present invention, this embodiment also includes a controller, which is connected to the first water pump 2, the first regulating valve 3, the first switch valve 5, the second water pump 7, the second switch valve 9, the second regulating valve 11 and the third regulating valve 12. The first water pump 2, the first regulating valve 3, the first switch valve 5, the second water pump 7, the second switch valve 9, the second regulating valve 11 and the third regulating valve 12 are controlled by the controller to achieve automatic control.

[0044] Example 3

[0045] refer to Figure 1 This embodiment discloses a heating method based on thermochemical energy storage and phase change energy storage. The heating method based on thermochemical energy storage and phase change energy storage is implemented based on the heating system based on thermochemical energy storage and phase change energy storage. The heating system based on thermochemical energy storage and phase change energy storage includes a water storage tank 1, a first water pump 2, a first regulating valve 3, a thermochemical reactor 4, a first switching valve 5, a heat exchanger 6, a second water pump 7, an ejector 8, a second switching valve 9, a phase change heat storage unit 10, a second regulating valve 11 and a third regulating valve 12. The specific connection relationship is as shown in Example 2.

[0046] Specifically, the heating method based on thermochemical energy storage and phase change energy storage includes the following steps:

[0047] The electric heating rated load of the thermochemical reactor is set to Pmax. When the electric load required by the thermochemical energy storage heating system to be consumed by the outside world is Pmax, the thermochemical energy storage system will be in the full module heat storage state, and the electric heating device in the thermochemical reactor 4 will be started to decompose the heat storage medium to generate water vapor. The second water pump 7 will be started to use the second water pump 7 to pass the feed water in the water storage tank 1 through the ejector 8 to eject the steam in the thermochemical reactor 4. The power of the second water pump 7 is set to Pw, and its size is related to the steam temperature Ta at the outlet of the ejector 8. The steam at the outlet pressure of the ejector 8 of the equipment is The saturation temperature is Tb, then Pw = c*(1 / (Ta / Tb)), where c is the proportional coefficient; the formed mixed steam enters the phase change heat storage unit 10 through the second switching valve 9 for heat exchange and cooling, and the cooled hot water passes through the heat exchanger 6 to supply heat to the outside to form cooling water, which is returned to the water storage tank 1. In addition, the mixed steam output by the ejector 8 can also directly enter the heat exchanger 6 through the second regulating valve 11 to increase the heat exchange power and improve flexibility. When the material temperature T1 in the thermochemical reactor 4 is greater than T1max, it is considered that the heat storage condition is terminated.

[0048] When the external electrical load required to be absorbed by the thermochemical energy storage heating system is 0, the thermochemical energy storage system will be in a full-module heat storage state, and the heat release power of the thermochemical reactor 4 is set to Qmax. When the external steam load demand is Qmax, the thermochemical energy storage system will be in a heat release state. At this time, the first water pump 2 is started, the first regulating valve 3 is opened, and part of the feed water enters the heat exchanger 6 after being heated by the thermochemical reactor 4. Steam can also enter the shell side of the thermochemical reactor 4 through the third regulating valve 12 to react with the reaction medium. The material temperature in the thermochemical reactor 4 is set to T1, and its temperature change rate is dT1. When the material temperature T1 in the thermochemical reactor 4 is lower than T1a, the third regulating valve 12 is adjusted to open. The opening degree K of the third regulating valve 12 is related to dT1 and T1. When dT1 is greater than 0, k1=1-d*dT1+e*(T1 / T1max), d and e are proportional coefficients, and T1max is the maximum temperature of the material; when dT1 is less than 0, the third regulating valve 12 is closed.

[0049] The feed water output from the water storage tank 1 enters the phase change heat storage unit 10, is heated to become steam, and then enters the thermochemical reactor 4 through the third regulating valve 12. At this time, the heat release rate Q on the shell side of the thermochemical reactor 4 is proportional to the opening k1 of the third regulating valve 12 and the steam flow f from the phase change heat storage unit 10, that is, Q = a1k1 + a2f, where a1 and a2 are proportional coefficients. During the heat release process, the temperature of the phase change material inside the phase change material is T2. The heat released by the system during the heat release process is W = m1(h+c1ΔT1)+m2(r+c2ΔT2), where m1 is the total mass of the material in the thermochemical reactor 4, m2 is the total mass of the material in the phase change heat storage unit 10, h is the chemical heat of the material in the thermochemical reactor 4, r is the latent heat of phase change of the material in the phase change heat storage unit 10, c1 and c2 are specific heat capacities, ΔT1 and ΔT2 are temperature changes, and the heat release ratio k is set to W / W0. When k is greater than 0.9, the heat release process can be considered to be completed and the next heat storage reaction begins. At this time, it can be ensured that the hot water temperature in the heat storage tank 1 is not lower than the utilization temperature.

[0050] When the external electrical load required by the thermochemical energy storage heating system is greater than 0 and less than Pmax, the thermochemical energy storage system will be in a partial heat storage state, and the electric heating in the thermochemical reactor 4 is adjusted to the external demand power.

[0051] When the external steam demand Q is greater than 0, the thermochemical energy storage system will be in a partial heat release state. At this time, when the electric heating in the thermochemical reactor 4 is turned on and the power is P, if P is greater than Q, the third regulating valve 12 will not be opened. When P is less than Q, the material temperature T1 in the thermochemical reactor 4 is observed. When T1 is lower than T1a, the third regulating valve 12 will be opened.

[0052] It should be noted that the present invention is characterized in that:

[0053] 1) The present invention can realize 24-hour heating with green electricity, and is suitable for heating scenarios and emergency protection scenarios.

[0054] 2) The present invention combines thermochemical energy storage with phase change energy storage to achieve energy utilization efficiency exceeding 95%.

[0055] 3) This system is a closed cycle and can be skid-mounted to form a mobile heat source vehicle.

[0056] Those skilled in the art will readily identify other embodiments of the present invention after considering the specification and disclosure of the invention. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the invention being indicated by the following claims.

[0057] It should be understood that the present invention is not limited to the exact construction described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0058] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A heating system based on thermochemical energy storage and phase change energy storage, characterized in that: It comprises a water storage tank (1), a first water pump (2), a thermochemical reactor (4), a heat exchanger (6), a phase change heat storage unit (10) and an ejector (8); The outlet of the water storage tank (1) is divided into two paths after passing through the first water pump (2), one of which is connected to the tube side inlet of the thermochemical reactor (4), and the other is connected to the inlet of the heat exchanger (6). The tube side outlet of the thermochemical reactor (4) is divided into three paths, wherein the first path is connected to the inlet of the phase change heat storage unit (10), the second path is connected to the shell side inlet of the thermochemical reactor (4), and the third path is connected to the inlet of the heat exchanger (6). The shell side outlet of the thermochemical reactor (4) is connected to the inlet of the ejector (8), the outlet of the water storage tank (1) is connected to the inlet of the ejector (8), the outlet of the ejector (8) is connected to the inlet of the phase change heat storage unit (10), the outlet of the phase change heat storage unit (10) is connected to the inlet of the heat exchanger (6), and the outlet of the heat exchanger (6) is connected to the inlet of the water storage tank (1).

2. The heating system based on thermochemical energy storage and phase change energy storage according to claim 1 is characterized in that: The outlet of the first water pump (2) is connected to the tube-side inlet of the thermochemical reactor (4) via a first regulating valve (3).

3. The heating system based on thermochemical energy storage and phase change energy storage according to claim 2 is characterized in that: The tube-side outlet of the thermochemical reactor (4) is divided into three paths after passing through the first switch valve (5).

4. The heating system based on thermochemical energy storage and phase change energy storage according to claim 3 is characterized in that: The tube-side outlet of the thermochemical reactor (4) is connected to the shell-side inlet of the thermochemical reactor (4) via a third regulating valve (12).

5. The heating system based on thermochemical energy storage and phase change energy storage according to claim 4 is characterized in that: The tube-side outlet of the thermochemical reactor (4) is connected to the inlet of the heat exchanger (6) via a second regulating valve (11).

6. The heating system based on thermochemical energy storage and phase change energy storage according to claim 5 is characterized in that: The outlet of the ejector (8) is connected to the inlet of the phase-change heat storage unit (10) via the second switching valve (9).

7. The heating system based on thermochemical energy storage and phase change energy storage according to claim 6, characterized in that: The outlet of the water storage tank (1) is connected to the inlet of the ejector (8) via the second water pump (7).

8. The heating system based on thermochemical energy storage and phase change energy storage according to claim 1, characterized in that: The thermochemical reactor (4) is provided with an electric heating device, and heat storage materials are arranged outside the tube side of the thermochemical reactor (4).

9. A heating method based on thermochemical energy storage and phase change energy storage, characterized in that: The heating system based on thermochemical energy storage and phase change energy storage according to claim 7 comprises the following steps: During the heat storage process, the electric heating device in the thermochemical reactor (4) is started to decompose the heat storage medium to generate water vapor, and the second water pump (7) is started. The feed water in the water storage tank (1) is passed through the ejector (8) by the second water pump (7) to eject the steam in the thermochemical reactor (4). The formed mixed steam passes through the second switch valve (9) and enters the phase change heat storage unit (10) for heat exchange and cooling. The cooled hot water passes through the heat exchanger (6) to supply heat to the outside to form cooling water, and the cooling water is returned to the water storage tank (1); During the heat release process, the first water pump (2) is started, the first regulating valve (3) is opened, and part of the feed water output from the water storage tank (1) is heated on the tube side of the thermochemical reactor (4) and then enters the heat exchanger (6). Another part of the feed water output from the water storage tank (1) enters the phase change heat storage unit (10) for heat exchange and temperature increase to form steam, and then enters the tube side of the thermochemical reactor (4), where an exothermic reaction occurs.

10. A heating method based on thermochemical energy storage and phase change energy storage, characterized in that: The heating system based on thermochemical energy storage and phase change energy storage according to claim 7 comprises the following steps: During the heat storage process, the electric heating device in the thermochemical reactor (4) is started to decompose the heat storage medium to generate water vapor, and the second water pump (7) is started. The feed water in the water storage tank (1) is passed through the ejector (8) by the second water pump (7) to eject the steam in the thermochemical reactor (4). The resulting mixed steam directly enters the heat exchanger (6) through the second regulating valve (11) to supply heat to the outside to form cooling water, and the cooling water is returned to the water storage tank (1); During the heat release process, the first water pump (2) is started, the first regulating valve (3) is opened, and part of the feed water is heated through the tube side of the thermochemical reactor (4). The hot water thus formed enters the heat exchanger (6), and the steam thus formed enters the shell side of the thermochemical reactor (4) through the third regulating valve (12) to react with the reaction medium in an exothermic reaction. Another part of the feed water output from the water storage tank (1) enters the phase change heat storage unit (10) for heat exchange and temperature increase to form steam, which then enters the tube side of the thermochemical reactor (4).

Images