JP7472509B2 - Heat storage body and chemical heat storage reactor - Google Patents

Description

The present invention relates to a heat storage body and a chemical heat storage reactor.

Conventionally, chemical heat storage reactors equipped with a heat storage body capable of repeatedly storing and releasing heat through a chemical reaction with water are known. For example, Patent Document 1 discloses a chemical heat storage reactor equipped with a lower heat storage body that generates steam by reacting with water, and an upper heat storage body that is disposed above the lower heat storage body and generates heat by reacting with the steam generated by the lower heat storage body.

JP 2019-184119 A

The lower heat storage body described in Patent Document 1 includes a heat storage molding made of a heat storage material and a tubular member that covers the heat storage molding, and a filter section is disposed in the tubular member to allow reactive water that reacts with the heat storage material to flow into the inside of the tubular member. However, because this filter section is disposed in a portion of the tubular member, reactive water that flows into the inside of the tubular member through the filter section first reacts with the heat storage material near the filter section. In addition, the reaction of the heat storage material located away from the filter section with the reactive water is slower than that of the heat storage material near the filter section. For this reason, the expansion of the heat storage material due to the reaction with water becomes non-uniform, which may damage the restraining member.

The present invention has been made to solve the above-mentioned problems, and aims to provide a technology that suppresses damage to restraining members caused by expansion of the heat storage material in a chemical heat storage reactor.

The present invention has been made to solve at least some of the above problems, and can be realized in the following form.

(1) According to one aspect of the present invention, a heat storage body is provided. The heat storage body includes a heat storage material that generates steam by reacting with reactive water, a cylindrical restraining member that is disposed on the outside of the heat storage material, and a flow path forming portion that is formed on at least one of the heat storage material and the restraining member and that forms a flow path between the heat storage material and the restraining member for circulating reactive water that is supplied to the heat storage material.

According to this configuration, a flow path for circulating the reaction water is formed between the heat storage material and the restraining member by the flow path forming section. This allows the reaction water to spread over a wide area of the heat storage material, so that the hydration reaction of the heat storage material can proceed at the same time over a wide area of the heat storage material. Therefore, the expansion of the heat storage material due to the hydration reaction becomes uniform, and damage to the restraining member due to non-uniform expansion can be suppressed.

(2) In the heat storage body of the above embodiment, the flow path forming portion is a groove portion formed on the inner surface of the restraining member, and the groove portion may extend along the axial direction of the restraining member and be arranged in a row in a plurality of portions along the circumferential direction of the restraining member. According to this configuration, for example, the reaction water supplied to the heat storage body from the axial direction of the restraining member can flow through the groove portion to the side opposite to the side to which the reaction water of the heat storage material is supplied. This allows the reaction water to be distributed over a wide area in the axial direction of the heat storage material, so that the expansion of the heat storage material due to the hydration reaction becomes uniform, and damage to the restraining member due to uneven expansion can be suppressed.

(3) In the heat storage body of the above embodiment, the flow path forming portion is a groove portion formed on the outer surface of the heat storage material, and the groove portion may extend along the axial direction of the heat storage material, and a plurality of the groove portions may be arranged side by side along the circumferential direction of the heat storage material. According to this configuration, the reaction water supplied to the heat storage body from the axial direction of the heat storage material can flow through the groove portion to the side opposite to the side to which the reaction water of the heat storage material was supplied. This allows the reaction water to be distributed over a wide area in the axial direction of the heat storage material, so that the expansion of the heat storage material due to the hydration reaction becomes uniform, and damage to the restraining member due to non-uniform expansion can be suppressed.

(4) In the heat storage body of the above embodiment, the flow path forming portion is a groove portion formed on the inner surface of the restraining member, and the groove portion may extend along the circumferential direction of the restraining member, and multiple groove portions may be arranged side by side along the axial direction of the restraining member. According to this configuration, for example, reaction water supplied to the heat storage body from the radial direction of the restraining member can flow through the groove portion to the side opposite to the side to which the reaction water of the heat storage material is supplied. This allows the reaction water to be distributed over a wide area in the circumferential direction of the heat storage material, so that the expansion of the heat storage material due to the hydration reaction becomes uniform, and damage to the restraining member due to uneven expansion can be suppressed.

(5) In the heat storage body of the above embodiment, the flow path forming portion is a groove portion formed on the outer surface of the heat storage material, and the groove portion may extend along the circumferential direction of the heat storage material, and a plurality of the groove portions may be arranged side by side along the axial direction of the heat storage material. According to this configuration, for example, the reaction water supplied to the heat storage body from the radial direction of the heat storage material can flow through the groove portion to the side opposite to the side to which the reaction water of the heat storage material is supplied. This allows the reaction water to be distributed over a wide area in the circumferential direction of the heat storage material, so that the expansion of the heat storage material due to the hydration reaction becomes uniform, and damage to the restraining member due to uneven expansion can be suppressed.

(6) According to another aspect of the present invention, a chemical heat storage reactor is provided. This chemical heat storage reactor comprises the above-mentioned heat storage body, a heat generating heat storage body that generates heat by reacting with steam generated by the heat storage body, and a reaction vessel that contains the heat storage body and the heat generating heat storage body. According to this configuration, in the heat storage body, the flow path formed by the flow path forming portion allows the reactive water to spread over a wide area of the heat storage material, so that the expansion of the heat storage material due to the hydration reaction becomes uniform, and damage to the restraining member due to uneven expansion can be suppressed.

The present invention can be realized in various forms, such as a method for manufacturing a heat storage body, a method for manufacturing a chemical heat storage reactor, a computer program for causing a computer to execute the manufacture of a heat storage body, a server device for distributing a computer program, a non-transitory storage medium storing a computer program, etc.

FIG. 2 is a schematic diagram of the chemical heat storage device according to the first embodiment. 2 is a cross-sectional view taken along line AA in FIG. 1. 3 is a cross-sectional view taken along line BB in FIG. 2. FIG. 2 is a perspective view of a steam generating heat storage medium provided in the chemical heat storage reactor. FIG. 2 is a schematic diagram of a heat storage material provided in a steam generation heat storage body. 4 is a schematic diagram of a heat storage material restraining cover provided in the steam generation heat storage body. FIG. FIG. 1 is a first diagram illustrating the operation of a chemical heat storage reactor. FIG. 2 is a second diagram illustrating the operation of the chemical heat storage reactor. FIG. 4 is a diagram for explaining the function of a heat storage medium for generating steam. FIG. 11 is a schematic diagram of a heat storage material provided in a steam generation heat storage body of a second embodiment. FIG. 4 is a diagram for explaining the function of a heat storage medium for generating steam. FIG. 13 is a schematic diagram of a heat storage body for steam generation according to a third embodiment. FIG. 1 is a first diagram illustrating the operation of a chemical heat storage reactor. FIG. 2 is a second diagram illustrating the operation of the chemical heat storage reactor. FIG. 13 is a perspective view of a heat storage body for steam generation according to a fourth embodiment. 4 is a schematic diagram of a heat storage material restraining cover provided in the steam generation heat storage body. FIG. FIG. 4 is a first diagram illustrating the function of a heat storage medium for generating steam. FIG. 4 is a second diagram illustrating the function of the steam generating heat storage body. FIG. 13 is a schematic diagram of a heat storage material provided in a steam generation heat storage body of a fifth embodiment. FIG. 4 is a first diagram illustrating the function of a heat storage medium for generating steam. FIG. 4 is a second diagram illustrating the function of the steam generating heat storage body.

First Embodiment
FIG. 1 is a schematic diagram of a chemical heat storage device 100 of the first embodiment. FIG. 2 is a cross-sectional view of line A-A in FIG. 1, which is a cross-sectional view of the chemical heat storage reactor 101 provided in the chemical heat storage device 100, for example, in the horizontal direction. FIG. 3 is a cross-sectional view of line B-B in FIG. 2, which is a cross-sectional view of the chemical heat storage reactor 101, for example, in the vertical direction. The chemical heat storage device 100 can repeatedly release and store thermal energy by a chemical reaction in the chemical heat storage reactor 101. As shown in FIG. 1, the chemical heat storage device 100 includes a chemical heat storage reactor 101 and a tank 6. The chemical heat storage reactor 101 includes a steam generation heat storage body 1, a heat generation heat storage body 90, and a reaction vessel 7 (see FIGS. 2 and 3). The reaction vessel 7 has a storage space 8 that stores the steam generation heat storage body 1 and the heat generation heat storage body 90. The tank 6 stores the reaction water and steam water to be supplied to the chemical heat storage reactor 101. Between the chemical heat storage reactor 101 and the tank 6, a connection flow path 5a and a manifold 5b are arranged. The connection flow path 5a connects the manifold 5b and the tank 6, and sends the reaction water and steam water stored in the tank 6 to the manifold 5b. The manifold 5b distributes the reaction water and steam water supplied to the chemical heat storage reactor 101 by the tank 6 so that they are supplied to a predetermined position of the chemical heat storage reactor 101. The x-axis direction shown in Figures 1 to 3, 7, and 8 is the direction in which the steam generation heat storage body 1 or the heat generation heat storage body 90 is arranged in the reaction vessel 7, and the y-axis direction is the direction in which the steam generation heat storage body 1 and the heat generation heat storage body 90 are arranged in the reaction vessel 7, which is perpendicular to the x-axis direction. The z-axis direction is perpendicular to the x-axis direction and the y-axis direction.

Figure 4 is a perspective view of the steam generating heat storage body 1 provided in the chemical heat storage reactor 101. The steam generating heat storage body 1 includes a heat storage material 10, a heat storage material restraining cover 20, and a groove portion 22. In this embodiment, the chemical heat storage reactor 101 includes three steam generating heat storage bodies 1. The steam generating heat storage body 1 generates heat for generating steam using reaction water supplied by the tank 6. The steam generating heat storage body 1 corresponds to the "heat storage body" in the claims. The heat storage material restraining cover 20 corresponds to the "restraining member" in the claims. In Figure 4, the heat storage material 10 is hatched to make it easier to recognize the shape of the groove portion 22.

FIG. 5 is a schematic diagram of the heat storage material 10 included in the heat storage body 1 for steam generation. FIG. 5(a) is a perspective view of the heat storage material 10, FIG. 5(b) is a schematic diagram of the heat storage material 10 viewed from a direction along the central axis C10 of the heat storage material 10, which is approximately coaxial with the central axis C1 of the heat storage body 1 for steam generation, and FIG. 5(c) is a cross-sectional view including the central axis C10 of the heat storage material 10. The heat storage material 10 is, for example, a molded body of calcium oxide, which is one of the oxides of alkaline earth metals. The heat storage material 10 is molded into a predetermined shape by kneading and firing calcium oxide granules with a binder such as a clay mineral. In this embodiment, the heat storage material 10 is formed into a cylindrical shape. The heat storage material 10 generates heat by a hydration reaction shown in formula (1) and stores heat by a dehydration reaction shown in formula (2), and can reversibly repeat heat generation and heat storage.
CaO + H ₂ O → Ca(OH) ₂ + Q1 ... (1)
Ca(OH) ₂ + Q2 → CaO + H ₂ O ... (2)
In addition, Q1 in formula (1) represents the amount of heat generated in the hydration reaction, and Q2 in formula (2) represents the amount of heat stored in the dehydration reaction.

Figure 6 is a schematic diagram of the heat storage material restraining cover 20 provided in the heat storage body 1 for generating steam. Figure 6(a) is a diagram of the heat storage material restraining cover 20 viewed from a direction along the central axis C20 of the heat storage material restraining cover 20, which is approximately coaxial with the central axis C1 of the heat storage body 1 for generating steam, and Figure 6(b) is a cross-sectional view including the central axis C20 of the heat storage material restraining cover 20. For ease of explanation, Figure 6(a) shows a cross-sectional view of the state in which the heat storage material 10 (two-dot chain line 10 shown in Figure 6(a)) is inserted inside the heat storage material restraining cover 20.

The heat storage material restraining cover 20 is a cylindrical member arranged on the outside of the heat storage material 10. The heat storage material restraining cover 20 is formed to cover the outer surface 10a of the heat storage material 10. The heat storage material restraining cover 20 has a through hole 21 formed along the central axis C20 into which the heat storage material 10 is inserted. A plurality of grooves 22 are arranged on the inner surface 20a of the heat storage material restraining cover 20 that forms the through hole 21. The plurality of grooves 22 extend along the direction of the central axis C20 of the heat storage material restraining cover 20 and are arranged side by side along the circumferential direction of the heat storage material restraining cover 20. In this embodiment, the grooves 22 are arranged on the inner surface 20a of the heat storage material restraining cover 20 to both ends of the heat storage material restraining cover 20 as shown in FIG. 6 (b). As shown in FIG. 6(a), when the heat storage material 10 is placed in the through hole 21, a flow path 22a through which the reactive water can flow is formed inside the heat storage material restraining cover 20 by the outer surface 10a of the heat storage material 10 and the groove portion 22. The multiple groove portions 22 correspond to the "flow path forming portion" in the claims. The heat storage material restraining cover 20 corresponds to the "restraining member" in the claims. Note that, although the heat storage material restraining cover 20 is formed in a cylindrical shape in this embodiment, it may be a tube with a rectangular cross section or other shapes.

The heat generating heat storage body 90 includes a heat storage material 91 and a heat storage material restraining cover 92 (see Figures 2 and 3). In this embodiment, the chemical heat storage reactor 101 includes eight heat generating heat storage bodies 90. The heat generating heat storage body 90 generates heat using steam generated by the heat generated by the steam generating heat storage body 1.

The heat storage material 91 is a molded body of calcium oxide, which is an oxide of alkaline earth metals, like the heat storage material 10 of the steam generating heat storage body 1. The heat storage material 91 is molded into a cylindrical shape by kneading calcium oxide granules with a binder such as a clay mineral and firing the mixture.

The heat storage material restraining cover 92 is a cylindrical member disposed on the outside of the heat storage material 91, and has a through hole 93 through which the heat storage material 91 is inserted along the central axis C90 of the heat generating heat storage body 90 (see FIG. 2). In this embodiment, the heat storage material restraining cover 92 has holes 94 formed at predetermined positions that restrict the passage of the granular matter that constitutes the heat storage material 91 while allowing the passage of steam.

In this embodiment, in the storage space 8 of the chemical heat storage reactor 101, the central axis C1 of each of the three steam generating heat storage bodies 1 and the central axis C90 of each of the eight heat generating heat storage bodies 90 are arranged along the z-axis direction (see FIG. 2). That is, the steam generating heat storage body 1 and the heat generating heat storage body 90 are arranged in a state in which the central axis C1 of each of the three steam generating heat storage bodies 1 and the central axis C90 of each of the eight heat generating heat storage bodies 90 are approximately parallel to the z-axis. At this time, the three steam generating heat storage bodies 1 are arranged so as to be aligned along the x-axis direction. On each of the positive and negative sides of the three steam generating heat storage bodies 1 in the y-axis direction, four heat generating heat storage bodies 90 are arranged so as to be aligned along the x-axis direction (see FIG. 2).

In the chemical heat storage reactor 101, as described above, three cylindrical steam generating heat storage bodies 1 and eight cylindrical heat generating heat storage bodies 90 are arranged side by side, so that a gap is formed between adjacent heat storage bodies. In this embodiment, as shown in FIG. 2, the gap between the steam generating heat storage body 1 and the heat generating heat storage body 90 is the first gap Sp1, and the gap between the steam generating heat storage body 1 or the heat generating heat storage body 90 and the reaction vessel 7 is the second gap Sp2.

In this embodiment, a plurality of through holes 5c, 5d are formed in the wall of the manifold 5b side of the reaction vessel 7 (see FIG. 3). Water supplied to the storage space 8 flows through each of the through holes 5c, 5d. The manifold 5b distributes the flow of water so that the reaction water supplied by the tank 6 flows through the through holes 5c and the steam water flows through the through holes 5d.

In this embodiment, as shown in FIG. 3, the storage space 8 is partitioned by a plurality of partition members 9a, 9b, and 9c. The partition member 9a is connected to the inner wall of the reaction vessel 7 and the positive end of the steam generation heat storage body 1 in the z-axis direction. The storage space 8a partitioned by the partition member 9a communicates with the through hole 5c and the flow path 22a of the steam generation heat storage body 1. The partition member 9b is connected to the inner wall of the reaction vessel 7 and the negative end of the steam generation heat storage body 1 in the z-axis direction. The storage space 8b partitioned by the partition member 9b communicates with the flow path 22a of the steam generation heat storage body 1. The partition member 9c is connected to the inner wall of the reaction vessel 7 and the positive end of the heat generation heat storage body 90 in the z-axis direction. The partition member 9c, together with the partition member 9a, forms a flow path 8c that communicates with the through hole 5d and the first gap Sp1.

Figure 7 is a first diagram explaining the function of the chemical heat storage reactor 101. Figure 8 is a second diagram explaining the function of the chemical heat storage reactor 101. Next, the heat dissipation function of the chemical heat storage device 100 will be explained. When the chemical heat storage device 100 dissipates heat, reaction water and steam water are supplied from the tank 6 to the chemical heat storage reactor 101 via the connection flow path 5a and the manifold 5b. The reaction water flows into the storage space 8a of the chemical heat storage reactor 101 through the through hole 5c. The steam water flows into the first gap Sp1 through the through hole 5d and the flow path 8c.

The reactive water passes through the storage space 8a and flows into the multiple flow paths 22a of the steam generating heat storage body 1 (solid line arrows W1 in FIG. 8). The reactive water flowing through the flow paths 22a undergoes a hydration reaction with the heat storage material 10 of the steam generating heat storage body 1. When the reactive water and the heat storage material 10 undergo a hydration reaction, the heat storage material 10 generates heat. The reactive water that leaves the steam generating heat storage body 1 without undergoing a hydration reaction with the heat storage material 10 remains in the storage space 8b, and the reactive water is prevented from reacting with the heat storage material 91 of the heat generating heat storage body 90.

The heat generated in the heat storage material 10 heats the steam water (solid arrow W2 in FIG. 8) flowing through the first gap Sp1 via the heat storage material restraining cover 20 (dotted arrow H1 in FIG. 7 and FIG. 8). The steam generated from the steam water by the heat of the heat storage material 10 flows directly into the inside of the heat storage material restraining cover 92 when it flows on the negative side of the z-axis direction of the heat generation heat storage body 90 (dotted arrow V1 in FIG. 8). In addition, the steam that does not flow directly into the inside of the heat storage material restraining cover 92 when it flows on the negative side of the z-axis direction of the heat generation heat storage body 90 flows into the inside of the heat storage material restraining cover 92 through the hole 94 formed in the heat storage material restraining cover 92 when it flows through the second gap Sp2 (dotted arrow V2 in FIG. 8). The steam flowing into the inside of the heat storage material restraining cover 92 undergoes a hydration reaction with the heat storage material 91, causing the heat storage material 91 to generate heat. The heat generated in the heat storage material 91 is released to the outside of the chemical heat storage reactor 101 via the reaction vessel 7.

Figure 9 is a diagram explaining the function of the steam generating heat storage body 1. Figure 9 shows a cross-sectional view including the central axis C1 of the steam generating heat storage body 1. Here, the function of the steam generating heat storage body 1 when the chemical heat storage device 100 releases heat is explained.

In the steam generating heat storage body 1, as shown in FIG. 9, when the reactive water flows into the flow path 22a from one end E11 side of the steam generating heat storage body 1 (solid line arrow W1 shown in FIG. 9), it flows along the central axis C1 toward the other end E12. The heat storage material 10 generates heat by undergoing a hydration reaction with the reactive water W11 flowing through the flow path 22a. The heat generated in the heat storage material 10 is released to the outside of the heat storage material restraining cover 20 (dotted line arrow H1 shown in FIG. 9), and the steam water flowing outside the heat storage material restraining cover 20 is turned into steam. In the steam generating heat storage body 1, the reactive water W11 flowing into the flow path 22a from one end E11 side flows through the flow path 22a formed along the central axis C1, so it can reach the other end E12 of the steam generating heat storage body 1. That is, the reactive water is distributed throughout the entire heat storage material 10, so that the hydration reaction proceeds throughout the heat storage material 10, and heat is generated throughout the entire heat storage material 10. In this way, in the steam generating heat storage body 1, the reactive water flowing through one end of the steam generating heat storage body 1 flows into the flow path 22a, so that the reactive water can be distributed throughout the entire heat storage material 10.

In general, when a heat storage material that generates heat by hydration is reacted with steam, the steam tends to diffuse uniformly inside the heat storage material, so the hydration reaction with the steam tends to proceed at the same time throughout the heat storage material, and the heat storage material tends to expand uniformly. On the other hand, when a heat storage material is hydrated with reactive water, the reactive water is less likely to diffuse inside the heat storage material than steam, so the heat storage material expands from the part that reacted with the reactive water. In a heat storage body in which the heat storage material is covered with a heat storage material restraining cover, if a reactive water inlet is provided in part of the heat storage material restraining cover, the heat storage material expands from the part near the inlet. Also, as described above, reactive water is less likely to diffuse, so the reactive water is less likely to reach parts away from the inlet. For this reason, the hydration reaction of the heat storage material away from the inlet proceeds more slowly than the hydration reaction of the heat storage material near the inlet, so the expansion due to the hydration reaction of the heat storage material becomes non-uniform, and there is a risk of the heat storage material restraining cover being damaged.

According to the heat storage body 1 for generating steam of this embodiment described above, a flow path 22a for circulating the reaction water is formed by the groove portion 22 between the outer surface 10a of the heat storage material 10 and the inner surface 20a of the heat storage material restraining cover 20. As a result, as shown in FIG. 9, the reaction water can be distributed throughout the heat storage material 10, so that the hydration reaction of the heat storage material 10 can proceed at the same timing throughout the heat storage material 10. Therefore, the expansion of the heat storage material 10 due to the hydration reaction becomes uniform, so that damage to the heat storage material restraining cover 20 due to uneven expansion can be suppressed.

In addition, according to the steam generating heat storage body 1 of this embodiment, a plurality of grooves 22 are arranged on the inner surface 20a of the heat storage material restraining cover 20. The plurality of grooves 22 extend along the direction of the central axis C20 of the heat storage material restraining cover 20, and are arranged side by side along the circumferential direction of the heat storage material restraining cover 20. As a result, in the steam generating heat storage body 1, the reaction water W11 flowing into the flow path 22a from one end E11 side flows through the flow path 22a formed along the central axis C1, so that the reaction water W11 can be distributed throughout the entire heat storage material 10. Therefore, the expansion of the heat storage material 10 due to the hydration reaction becomes uniform, and damage to the heat storage material restraining cover 20 due to uneven expansion can be suppressed.

In addition, according to the chemical heat storage reactor 101 of this embodiment, steam for generating heat from the heat storage material 91 of the heat generating heat storage body 90 is generated by a hydration reaction between the reaction water in the heat storage body 1 for steam generation and the heat storage material 10. At this time, as shown in FIG. 8, inside the reaction vessel 7, the reaction water flows only through the storage space 8a, the flow path 22a of the heat storage body 1 for steam generation, and the storage space 8b, so that the reaction water can be prevented from directly contacting the heat storage material 91 of the heat generating heat storage body 90. This can prevent the heat storage material 91 from expanding unevenly due to contact between the heat storage material 91 and the reaction water, and the heat storage material restraining cover 92 from being damaged.

Second Embodiment
Fig. 10 is a schematic diagram of the heat storage material included in the steam generating heat storage body 2 of the second embodiment. Fig. 11 is a diagram for explaining the action of the steam generating heat storage body 2. The steam generating heat storage body 2 of the second embodiment is different from the steam generating heat storage body of the first embodiment (Fig. 4) in the member in which the grooves are arranged and the direction in which the flow paths are formed.

The steam generating heat storage body 2 in this embodiment includes a heat storage material 30 and a heat storage material restraining cover 40. The steam generating heat storage body 2 generates heat using reactive water supplied by the tank 6. The steam generating heat storage body 2 corresponds to the "heat storage body" in the claims. The heat storage material restraining cover 40 corresponds to the "restraining member" in the claims.

The heat storage material 30 is, for example, a formed body of calcium oxide, which is one of the oxides of alkaline earth metals. The heat storage material 30 is formed into a predetermined shape by kneading calcium oxide granules with a binder such as a clay mineral and firing it. In this embodiment, the heat storage material 30 is formed in a cylindrical shape. A plurality of grooves 32 are arranged on the outer surface 30a of the heat storage material 30. The plurality of grooves 32 extend along the direction of the central axis C30 of the heat storage material 30, which is approximately coaxial with the central axis C2 of the steam generation heat storage body 2, and are arranged side by side along the circumferential direction of the heat storage material 30. In this embodiment, the grooves 32 are formed on the outer surface 30a of the heat storage material 30 to both ends of the heat storage material 30 as shown in FIG. 10(b). As shown in FIG. 10A, when the heat storage material restraining cover 40 is placed on the outside of the heat storage material 30, the grooves 32 of the heat storage material 30 and the inner surface 40a of the heat storage material restraining cover 40 form flow paths 32a on the inside of the heat storage material restraining cover 40 through which the reactive water can flow. The multiple grooves 32 correspond to the "flow path forming portion" in the claims.

The heat storage material restraining cover 40 is a cylindrical member that is placed on the outside of the columnar heat storage material 30. The heat storage material restraining cover 40 is formed to cover the outer surface 30a of the heat storage material 30. The heat storage material restraining cover 40 has a through hole through which the heat storage material 30 is inserted, along a central axis that is approximately coaxial with the central axis C2 of the steam generating heat storage body 2. Note that, although the heat storage material restraining cover 40 is formed in a cylindrical shape in this embodiment, it may be a tube with a rectangular cross section or other shapes to match the shape of the heat storage material 30.

11 is a diagram for explaining the function of the steam generating heat storage body 2, and is a cross-sectional view including the central axis C2 of the steam generating heat storage body 2. In the steam generating heat storage body 2, as shown in FIG. 11, when the reactive water flows into the flow path 32a from one end E21 side of the steam generating heat storage body 2 (solid line arrow W1 shown in FIG. 11), it flows along the central axis C2 toward the other end E22. The heat storage material 30 generates heat by hydration reaction with the reactive water W11 flowing through the flow path 32a. The heat generated in the heat storage material 30 is released to the outside of the heat storage material restraining cover 40 (dotted line arrow H1 shown in FIG. 11), and the steam water flowing outside the heat storage material restraining cover 40 becomes steam. In the steam generating heat storage body 2, the reactive water W11 flowing into the flow path 32a from one end E21 side flows through the flow path 32a formed along the central axis C2, so it can reach the other end E22 of the steam generating heat storage body 2. That is, the reactive water is distributed throughout the entire heat storage material 30, so that the hydration reaction proceeds throughout the heat storage material 30, and heat is generated throughout the entire heat storage material 30. In this way, in the steam generating heat storage body 2, the reactive water flowing through one end of the steam generating heat storage body 2 flows into the flow path 32a, so that the reactive water can be distributed throughout the entire heat storage material 30.

As described above, according to the present embodiment of the heat storage body 2 for generating steam, a flow path 32a for circulating reactive water is formed between the groove portion 32 of the heat storage material 30 and the heat storage material restraining cover 40. This allows the reactive water to flow to the end of the heat storage material 30, so that the hydration reaction of the heat storage material 30 can be carried out over a wide area. Therefore, damage to the heat storage material restraining cover 40 due to uneven expansion can be suppressed.

In addition, according to the heat storage body 2 for steam generation of this embodiment, a plurality of grooves 32 are arranged on the outer surface 30a of the heat storage material 30. The plurality of grooves 32 are extended along the direction of the central axis C30 of the heat storage material 30 and arranged in a row along the circumferential direction of the heat storage material 30. As a result, the reaction water supplied to the heat storage material 30 from the axial direction of the heat storage material restraining cover 40 flows through the flow path 32a formed between the grooves 32 and the heat storage material restraining cover 40, and is supplied to the opposite side to the side to which the reaction water is supplied (see FIG. 11). Therefore, the reaction water can be distributed throughout the heat storage material 30, so that the expansion of the heat storage material 30 due to the hydration reaction becomes uniform, and damage to the heat storage material restraining cover 40 due to uneven expansion can be suppressed.

Third Embodiment
Fig. 12 is a schematic diagram of the steam generating heat storage body 3 of the third embodiment. Fig. 13 is a first diagram for explaining the operation of the chemical heat storage reactor 101 in this embodiment. Fig. 14 is a second diagram for explaining the operation of the chemical heat storage reactor 101 in this embodiment. The steam generating heat storage body 3 of the third embodiment is different from the steam generating heat storage body of the second embodiment (Fig. 10) in the configuration of the heat storage material restraining cover.

The steam generating heat storage body 3 in this embodiment includes a heat storage material 30 and a heat storage material restraining cover 50. The steam generating heat storage body 3 generates heat using reactive water supplied by the tank 6. The steam generating heat storage body 3 corresponds to the "heat storage body" in the claims.

The heat storage material restraining cover 50 is a cylindrical member arranged on the outside of the heat storage material 30. As shown in FIG. 12(a), the heat storage material restraining cover 50 is formed so as to cover the outer surface 30a of the heat storage material 30. The heat storage material restraining cover 50 has a through hole 51 into which the heat storage material 30 is inserted along a central axis that is substantially coaxial with the central axis C3 of the steam generating heat storage body 3. The heat storage material restraining cover 50 has holes 52 formed at predetermined positions that restrict the passage of the granular material constituting the heat storage material 30 while allowing the passage of the reaction water (see FIG. 12(b)). That is, the heat storage material restraining cover 50 is formed of a hole forming portion P53 in which the hole 52 is formed, and a wall portion P54 in which the hole 52 is not formed and does not allow the passage of the reaction water or steam. In this embodiment, the heat storage material restraining cover 50 is formed in a cylindrical shape, but may have a cylindrical shape with a rectangular cross section or other shapes according to the shape of the heat storage material 30.

In the chemical heat storage reactor 101 of this embodiment, as shown in FIG. 13, among the gaps between the steam generating heat storage 3 and the heat generating heat storage 90, the gap formed by the hole forming portion P53 of the steam generating heat storage 3 is the first gap Sp31, and the gap formed by the wall portion P54 of the steam generating heat storage 3 is the second gap Sp32. In addition, the gap between the steam generating heat storage 3 or the heat generating heat storage 90 and the reaction vessel 7 is the third gap Sp33.

In this embodiment, as shown in FIG. 14, the storage space 8 is partitioned by a plurality of partition members 9d, 9e, 9f, and 9g. The partition member 9d is connected to the positive side of the wall portion P54 of the steam generation heat storage body 3 in the z-axis direction and the inner wall of the reaction vessel 7, and the partition member 9e is connected to the negative side of the wall portion P54 of the steam generation heat storage body 3 in the z-axis direction and the inner wall of the reaction vessel 7. The partition member 9f is connected to the positive side of the z-axis direction of the portion of the heat generation heat storage body 90 where the hole 94 is not formed and the inner wall of the reaction vessel 7. The partition member 9g is connected to the negative side of the z-axis direction of the portion of the heat generation heat storage body 90 where the hole 94 is not formed and the first gap Sp31 is formed, and the inner wall of the reaction vessel 7. As a result, as shown in FIG. 14, the reactive water flowing through the through hole 5c of the reaction vessel 7 flows through the first gap Sp31 but does not flow into the second gap Sp32, thereby preventing the reactive water from reacting with the heat storage material 91 of the heat generating heat storage body 90.

Next, the heat dissipation function of the chemical heat storage device 100 will be described. When the chemical heat storage device 100 dissipates heat, reaction water and steam water are supplied from the tank 6 to the chemical heat storage reactor 101 via the connecting flow path 5a and the manifold 5b.

The reaction water supplied by the tank 6 flows through the through hole 5c into the flow path 8d of the chemical heat storage reactor 101. When the chemical heat storage device 100 first releases heat, the reaction water flows through the flow path 8d and mainly into the multiple flow paths 32a of the steam generation heat storage body 3 (solid line arrow W1 shown in FIG. 14). The reaction water flowing through the flow path 32a undergoes a hydration reaction with the heat storage material 30. This causes the heat storage material 10 to generate heat. Note that the reaction water that does not flow into the flow path 32a in the flow path 8d flows through the first gap Sp31 (solid line arrow W11 shown in FIG. 14), and can flow into the inside of the heat storage material restraining cover 50 through the hole 52 of the steam generation heat storage body 3 and react with the heat storage material 30 (solid line arrow W12 shown in FIG. 14). The reaction water that flows to the opposite side of the manifold 5b of the steam generating heat storage body 3 without undergoing a hydration reaction with the heat storage material 30 remains in the flow path 8e, so the reaction between the reaction water and the heat storage material 91 of the heat generating heat storage body 90 is suppressed.

The water for steam supplied by the tank 6 flows through the second gap Sp32 through the through hole 5d. The water for steam flowing through the second gap Sp32 (solid arrow W2 in FIG. 14) is heated by the heat released from the steam generating heat storage body 3 (dotted arrow H1 in FIG. 13 and FIG. 14) and becomes steam (dotted arrows V1 and V2 in FIG. 14). The steam generated in the second gap Sp32 flows into the inside of the heat storage material restraining cover 92 from the end of the heat generating heat storage body 90 on the negative side in the z-axis direction or through the hole 94 formed in the heat storage material restraining cover 92. The steam flowing into the inside of the heat storage material restraining cover 92 undergoes a hydration reaction with the heat storage material 91, causing the heat storage material 91 to generate heat. The heat generated in the heat storage material 91 is released to the outside of the chemical heat storage reactor 101 through the reaction vessel 7.

When the chemical heat storage device 100 releases heat for the first time, the heat storage material 30 and the reaction water undergo a hydration reaction, and the heat storage material 30 expands, so that the flow path 32a may disappear. In this case, when the chemical heat storage device 100 releases heat for the second time, the reaction water mainly flows through the first gap Sp31, and flows into the inside of the heat storage material restraining cover 50 through the hole 52 of the steam generating heat storage body 3, and reacts with the heat storage material 30. Since the first gap Sp31 is formed from the end of the reaction vessel 7 on the manifold 5b side to the opposite end, the reaction water can be supplied to the opposite side of the manifold 5b of the heat storage material 30.

As described above, according to the present embodiment of the heat storage body 3 for generating steam, a flow path 32a for circulating reactive water is formed between the groove portion 32 arranged in the heat storage material 30 and the heat storage material restraining cover 50. This allows the reactive water to flow to the end of the heat storage material 30, so that the hydration reaction of the heat storage material 30 can be carried out over a wide area. Therefore, damage to the heat storage material restraining cover 50 due to uneven expansion can be suppressed.

In addition, according to the steam generating heat storage body 3 of this embodiment, when the chemical heat storage device 100 releases heat for the second time, reactive water is supplied to the heat storage material 30, which has no flow path 32a due to expansion caused by the first hydration reaction, through the first gap Sp31 and the hole 52. As a result, even when releasing heat for the second time or later, the heat storage material 30 of the steam generating heat storage body 3 can undergo a hydration reaction with reactive water over the entire area, and the hydration reaction rate in the heat storage material 30 can be improved compared to the second embodiment.

Fourth Embodiment
Fig. 15 is a perspective view of the steam generating heat storage body 4 of the fourth embodiment. Fig. 16 is a schematic diagram of a heat storage material restraining cover 60 provided in the steam generating heat storage body 4 of the present embodiment. The steam generating heat storage body 4 of the fourth embodiment is different from the steam generating heat storage body of the first embodiment (Fig. 4) in the direction in which the flow paths are formed.

The steam generating heat storage body 4 in this embodiment includes a heat storage material 10 and a heat storage material restraining cover 60. The steam generating heat storage body 4 generates heat using reactive water supplied by the tank 6. The steam generating heat storage body 4 corresponds to the "heat storage body" in the claims. The steam generating heat storage body 4 is inserted into a through hole 61 formed in the heat storage material 10.

Figure 16(a) is a perspective view of the heat storage material restraining cover 60, Figure 16(b) is a view of the heat storage material restraining cover 60 viewed from a direction along the central axis C60 of the heat storage material restraining cover 60, and Figure 16(c) is a cross-sectional view including the central axis C60 of the heat storage material restraining cover 60. For ease of explanation, Figure 16(c) shows a cross-sectional view of the heat storage material 10 (dotted line 10 shown in Figure 16(c)) inserted inside the heat storage material restraining cover 60.

The heat storage material restraining cover 60 is a cylindrical member arranged on the outside of the heat storage material 10. The heat storage material restraining cover 60 is formed so as to cover the outer surface 10a of the heat storage material 10 (see FIG. 16(c)). The heat storage material restraining cover 60 has a through hole 61 formed along the central axis C60. A plurality of grooves 62 are arranged on the inner surface 60a of the heat storage material restraining cover 60 forming the through hole 61. The plurality of grooves 62 extend along the circumferential direction of the heat storage material restraining cover 60 and are arranged side by side along the direction of the central axis C60 of the heat storage material restraining cover 60. In this embodiment, the grooves 62 are formed in an annular shape on the inner surface 60a of the heat storage material restraining cover 60. As shown in FIG. 16(c), when the heat storage material 10 is arranged in the through hole 61, the outer surface 10a of the heat storage material 10 and the grooves 62 form a flow path 62a on the inside of the heat storage material restraining cover 60 through which the reactive water can flow. The multiple grooves 62 correspond to the "flow path forming portion" in the claims. The heat storage material restraining cover 60 corresponds to the "restraining member" in the claims.

In this embodiment, holes 63 are formed in a predetermined portion of the heat storage material restraining cover 60. The holes 63 restrict the passage of the granular material constituting the heat storage material 10, while allowing the passage of the reactive water. That is, as shown in FIG. 16(b), the heat storage material restraining cover 60 is formed by a hole forming portion P63 in which the holes 63 are formed, and a wall portion P64 that does not allow the passage of reactive water or steam. The ratio of the hole forming portion P63 and the wall portion P64 in the heat storage material restraining cover 60 varies depending on the position in the storage space 8, and can be set arbitrarily. Specifically, the hole forming portion P63 is arranged corresponding to the area where the reactive water flows, and the wall portion P64 is arranged corresponding to the area where the heat generating heat storage body 90 that generates heat by steam is arranged. In this embodiment, the heat storage material restraining cover 60 is formed in a cylindrical shape, but it may be a cylindrical shape with a rectangular cross section or other shapes.

Figure 17 is a first diagram explaining the function of the steam generating heat storage body 4. Figure 18 is a second diagram explaining the function of the steam generating heat storage body 4. Figure 17 shows a cross-sectional view including the central axis C4 of the steam generating heat storage body 4, and Figure 18 shows a cross-sectional view perpendicular to the central axis C4 of the steam generating heat storage body 4. Here, the function of the steam generating heat storage body 4 when the chemical heat storage device 100 releases heat will be explained.

The reactive water flowing outside the hole forming portion P63 of the steam generating heat storage body 4 (solid line arrow W0 in FIG. 17 and FIG. 18) flows into the inside of the heat storage material restraining cover 60 through the hole 63 of the hole forming portion P63 (solid line arrow W1 in FIG. 17 and FIG. 18). The reactive water that flows into the inside of the heat storage material restraining cover 60 flows through the flow path 62a formed by the outer surface 10a of the heat storage material 10 and the groove portion 62 (dotted line arrow W12 in FIG. 17 and solid line arrow W12 in FIG. 18). That is, the reactive water flows inside the heat storage material restraining cover 60 along the groove portion 62. The reactive water flowing through the flow path 62a hydrates with the heat storage material 10 while flowing toward the position opposite the position where the reactive water flowed into the inside of the heat storage material restraining cover 60. When a relatively large amount of reaction water flows into the inside of the heat storage material restraining cover 60, some of the reaction water can reach a position opposite the position where the reaction water flows into the inside of the heat storage material restraining cover 60, and the reaction water spreads throughout the heat storage material 10. As a result, the hydration reaction proceeds at the same time throughout the heat storage material 10. The heat generated by the progress of the hydration reaction is released to the outside of the heat storage material restraining cover 60 through the wall P64 (dotted arrow H1 in Figures 17 and 18).

According to the steam generating heat storage body 4 of this embodiment described above, a flow path 62a for circulating the reaction water is formed by the groove portion 62 between the outer surface 10a of the heat storage material 10 and the inner surface 60a of the heat storage material restraining cover 60. This allows the reaction water to spread throughout the entire heat storage material 10, so that the hydration reaction of the heat storage material 10 can proceed at the same timing throughout the heat storage material 10. Therefore, the expansion of the heat storage material 10 due to the hydration reaction becomes uniform, so that damage to the heat storage material restraining cover 60 due to uneven expansion can be suppressed.

In addition, according to the steam generating heat storage body 4 of this embodiment, the multiple grooves 62 are extended along the circumferential direction of the heat storage material restraining cover 60 and are arranged side by side along the direction of the central axis C60 of the heat storage material restraining cover 60. As a result, the reaction water flowing along the central axis C4 on the outside of the heat storage material restraining cover 60 can flow to the opposite side to the side to which the reaction water was supplied by flowing through the grooves 62 on the inside of the heat storage material restraining cover 60. Therefore, the reaction water can be distributed throughout the entire heat storage material 10, so that the expansion of the heat storage material 10 due to the hydration reaction becomes uniform, and damage to the heat storage material restraining cover 60 due to uneven expansion can be suppressed.

Fifth Embodiment
Fig. 19 is a schematic diagram of the heat storage material 70 included in the steam generating heat storage body 5 of the fifth embodiment. Fig. 20 is a first diagram for explaining the function of the steam generating heat storage body 5. Fig. 21 is a second diagram for explaining the function of the steam generating heat storage body 5. Fig. 20 shows a cross-sectional view including the central axis C5 of the steam generating heat storage body 5, and Fig. 21 shows a cross-sectional view perpendicular to the central axis C5 of the steam generating heat storage body 5. The steam generating heat storage body 5 of the fifth embodiment is different from the steam generating heat storage body 2 of the second embodiment (Fig. 10) in the direction in which the flow passages are formed.

The steam generating heat storage body 5 in this embodiment includes a heat storage material 70 and a heat storage material restraining cover 40. The steam generating heat storage body 5 generates heat using reactive water supplied by the tank 6. The steam generating heat storage body 5 corresponds to the "heat storage body" in the claims.

The heat storage material 70 is, for example, a formed body of calcium oxide, which is one of the oxides of alkaline earth metals. The heat storage material 70 is formed into a predetermined shape by kneading calcium oxide granules with a binder such as a clay mineral and firing it. In this embodiment, the heat storage material 70 is formed into a substantially cylindrical shape. A plurality of grooves 72 are arranged on the outer surface 70a of the heat storage material 70. The plurality of grooves 72 extend along the circumferential direction of the heat storage material 70 and are arranged side by side along the central axis C70 of the heat storage material 70. In this embodiment, the grooves 72 are formed in a ring shape on the outer surface 70a of the heat storage material 70. The plurality of grooves 72 correspond to the "flow path forming portion" in the claims.

The heat storage material restraining cover 40 is a cylindrical member arranged on the outside of the heat storage material 70. The heat storage material restraining cover 40 has a through hole formed along the central axis into which the heat storage material 70 is inserted. The heat storage material restraining cover 40 has holes 42 formed at predetermined positions that restrict the passage of the granular material constituting the heat storage material 70 while allowing the passage of reaction water (see FIG. 20). That is, the heat storage material restraining cover 40 has a hole forming portion P43 in which the hole 42 is formed, and a wall portion P44 in which the hole 42 is not formed and does not allow the passage of reaction water or steam. When the heat storage material 70 is inserted into the through hole of the heat storage material restraining cover 40, a flow path 72a through which the reaction water can flow is formed inside the heat storage material restraining cover 40 by the inner surface 40a and the groove portion 72 that form the through hole of the heat storage material restraining cover 40 (see FIG. 19(b)).

Next, the action of the heat storage body 5 for steam generation will be described. The reaction water flowing outside the hole formation part P43 of the heat storage body 5 for steam generation (solid line arrow W0 in FIG. 20 and FIG. 21) flows into the inside of the heat storage material restraining cover 40 through the hole 42 of the hole formation part P43 (solid line arrow W1 in FIG. 20 and FIG. 21). The reaction water that flows into the inside of the heat storage material restraining cover 40 flows through the flow path 72a formed by the groove part 72 of the heat storage material 70 and the inner side surface 40a of the heat storage material restraining cover 40 (dotted line arrow W12 in FIG. 20 and solid line arrow W12 in FIG. 21). The reaction water flowing through the flow path 72a can reach a position opposite to the position where the reaction water flows into the inside of the heat storage material restraining cover 40, so that the reaction water spreads throughout the heat storage material 70. As a result, the hydration reaction proceeds at the same timing throughout the heat storage material 70, and heat is generated. The heat generated by the progress of the hydration reaction is released to the outside of the heat storage material restraining cover 40 through the wall P44 (dotted arrow H1 in Figures 20 and 21).

According to the steam generating heat storage body 5 of this embodiment described above, a flow path 72a for circulating the reaction water is formed by the groove portion 72 between the heat storage material 70 and the inner surface 40a of the heat storage material restraining cover 40. This allows the reaction water to spread throughout the heat storage material 70, so that the hydration reaction of the heat storage material 70 can be carried out at the same timing throughout the heat storage material 70. Therefore, damage to the heat storage material restraining cover 40 due to uneven expansion can be suppressed.

In addition, according to the steam generating heat storage body 5 of this embodiment, a plurality of grooves 72 are formed on the outer surface 70a of the heat storage material 70. The plurality of grooves 72 are extended along the circumferential direction of the heat storage material 70 and are arranged side by side along the direction of the central axis C70 of the heat storage material 70. As a result, the reaction water supplied to the heat storage material 70 from the radial direction of the heat storage material 70 flows through the grooves 72 and is supplied to the opposite side to the side to which the reaction water is supplied. Therefore, the reaction water can be distributed throughout the entire heat storage material 70, so that the expansion of the heat storage material 70 due to the hydration reaction becomes uniform, and damage to the heat storage material restraining cover 40 due to uneven expansion can be suppressed.

<Modifications of this embodiment>
The present invention is not limited to the above-described embodiment, and can be embodied in various forms without departing from the spirit and scope of the invention. For example, the following modifications are also possible.

[Modification 1]
In the above-described embodiment, the groove portion extends along the circumferential or axial direction of the heat storage body, and a plurality of groove portions are arranged side by side along the axial or circumferential direction of the heat storage body. However, the direction in which the groove portions extend and the direction in which they are arranged side by side are not limited to this. For example, the groove portions may be formed in a spiral shape on the inner surface of the heat storage material restraining cover or the outer surface of the heat storage material.

[Modification 2]
In the above-described embodiment, a plurality of grooves are arranged, however, the number of grooves may be one.

[Modification 3]
The "flow path forming portion" described in the above embodiment may be, for example, in one heat storage body for steam generation, the groove portion 22 of the first embodiment and the groove portion 62 of the fourth embodiment formed in one heat storage material restraining cover. Also, in one heat storage body for steam generation, the groove portion 22 of the first embodiment may be formed in the heat storage material restraining cover, and the groove portion 72 of the fifth embodiment may be formed in the heat storage material. This makes it easier to distribute the reactive water in both the axial direction and the circumferential direction of the heat storage material in the heat storage body for steam generation, so that the expansion of the heat storage material becomes more uniform, and damage to the heat storage material restraining cover due to uneven expansion can be further suppressed.

[Modification 4]
In the first and second embodiments, the groove portion is formed on the inner surface of the heat storage material restraining cover or the outer surface of the heat storage material up to both ends of the heat storage material restraining cover or the heat storage material. However, the groove portion may be formed in a part of the heat storage material, not to both ends. Also, in the third and fourth embodiments, the groove portion is formed in an annular shape on the inner surface of the heat storage material restraining cover or the outer surface of the heat storage material. However, the groove portion is not limited to an annular shape. It may be formed in an arc shape.

Although this aspect has been described above based on the embodiment and modified examples, the embodiment of the above-mentioned aspect is intended to facilitate understanding of this aspect and does not limit this aspect. This aspect may be modified or improved without departing from the spirit and scope of the claims, and this aspect includes equivalents. Furthermore, if a technical feature is not described as essential in this specification, it may be deleted as appropriate.

1, 2, 3, 4, 5...Steam generating heat storage body 5a...Connection flow path 5b...Manifold 5c, 5d...Through hole 6...Tank 7...Reaction vessel 8,...Accommodation space 9, 9a, 9b, 9c, 9d, 9e, 9f, 9g...Partition member 10, 30, 70, 91...Heat storage material 10a, 30a, 70a...Outer surface 20, 40, 50, 60, 92...Heat storage material restraining cover 20a, 40a, 60a...Inner surface 21, 51, 61...Through hole 22, 32, 62, 72...Groove portion 22a, 32a, 62a, 72a...Flow path 23, 42, 52, 63, 94...Hole 90...Heat generating heat storage body 100...Chemical heat storage device 101...Chemical heat storage reactor P43, P53, P63... Hole forming portion P44, P54, P64... Wall portion Sp1, Sp31... First gap Sp2, Sp32... Second gap Sp33... Third gap

Claims (6)

A heat storage body,
A columnar heat storage material that generates steam by reacting with reactive water;
A cylindrical restraining member that accommodates the heat storage material therein, the restraining member having an inner surface formed to conform to an outer surface of the heat storage material;
A groove portion that forms a flow path for circulating reactive water supplied to the heat storage material between the heat storage material and the restraining member, the groove portion being formed on at least one of an outer surface of the heat storage material and an inner surface of the restraining member.
Heat storage body. The heat storage body according to claim 1,
The groove portion is
formed on an inner surface of the restraining member,
The restraining member includes a plurality of the first and second electrodes extending along an axial direction of the restraining member and arranged in a line along a circumferential direction of the restraining member.
Heat storage body. The heat storage body according to claim 1 or 2,
The groove portion is
is formed on the outer surface of the heat storage material,
A plurality of the heat storage members are arranged in a line along the circumferential direction of the heat storage material, and extend along the axial direction of the heat storage material.
Heat storage body. The heat storage body according to any one of claims 1 to 3,
The groove portion is
formed on the inner surface of the restraining member,
A plurality of the restraining members are arranged in a line along the axial direction of the restraining member, the restraining members being provided to extend along the circumferential direction of the restraining member.
Heat storage body. The heat storage body according to any one of claims 1 to 4,
The groove portion is
It is formed on the outer surface of the heat storage material,
A plurality of the heat storage material members are arranged in a line along the axial direction of the heat storage material, and extend along the circumferential direction of the heat storage material.
Heat storage body. 1. A chemical heat storage reactor comprising:
A heat storage body according to any one of claims 1 to 5,
A heat generating heat storage body that generates heat by reacting with steam generated by the heat storage body;
A reaction vessel containing the heat storage body and the heat generating heat storage body,
Chemical heat storage reactor.

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