Chemical thermal storage device

Abstract

The objective is to provide a chemical heat storage device that has high reaction efficiency and high heat transfer efficiency during heat storage and release, resulting in high overall energy efficiency. [Solution] The chemical heat storage device 1 comprises a reactor 2 that partitions a storage section 22 inside, a heat storage body 4 arranged in the storage section 22, a heat transfer member 5 arranged inside the heat storage body 4 that partitions a heat transfer medium channel 52 through which a heat transfer medium that exchanges heat with the heat storage body 4 passes, and a channel member 6 arranged inside the heat storage body 4 that partitions a reaction medium channel 60 through which a reaction medium passes and which opens toward the heat storage body 4.

Description

Technical Field

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[0001] The present disclosure relates to a chemical heat storage device that can reversibly store and release heat by utilizing the heat of a chemical reaction.

Background Art

[0002] Patent Document 1 discloses a chemical heat storage device having a chemical heat storage material, a reactor, and a heat exchange mechanism. The chemical heat storage material is filled in the reactor. On the wall of the reactor, a first opening for inflow of reaction gas and a second opening for outflow of generated gas are provided.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the case of the chemical heat storage device of the same document, during heat release, the reaction gas flows from the outside to the inside of the reactor only through the first opening. Therefore, it is difficult for the reaction gas to diffuse throughout the chemical heat storage material. Also, during heat storage, the generated gas flows out from the inside to the outside of the reactor only through the second opening. Therefore, it is difficult to recover the generated gas from the entire chemical heat storage material. Thus, in the case of the chemical heat storage device of the same document, the reaction efficiency during heat storage and release is low. Therefore, the energy efficiency of the entire system (for example, a chemical heat pump, an exhaust heat recovery and utilization system, an engine warm-up device, etc.) equipped with the chemical heat storage device is low.

[0005] Furthermore, Patent Document 1 does not disclose the specific configuration of the heat exchange mechanism. Let's assume that the heat exchange mechanism is a heat transfer tube inserted inside the chemical heat storage material. In this case, the heat transfer tube is prone to deformation over time due to volume changes (expansion and contraction) of the chemical heat storage material associated with heat storage and release, as well as the weight of the heat transfer tube itself. As a result, the position of the heat transfer tube relative to the chemical heat storage material is prone to change, and gaps are likely to occur between the chemical heat storage material and the heat transfer tube. Therefore, it is difficult to recover heat from the entire chemical heat storage material to the heat transfer tube during heat release. Also, it is difficult to supply heat from the heat transfer tube to the entire chemical heat storage material during heat storage. Thus, in the case of the chemical heat storage device described in the document, the heat transfer efficiency during heat storage and release is low. Therefore, the overall energy efficiency of the system equipped with the chemical heat storage device is low.

[0006] Therefore, the present disclosure aims to provide a chemical heat storage device that has high reaction efficiency and heat transfer efficiency during heat storage and release, and high overall energy efficiency. [Means for solving the problem]

[0007] (1) In order to solve the above problems, the chemical heat storage device of the present disclosure is characterized by comprising: a reactor that partitions a storage section internally; a heat storage body disposed in the storage section; a heat transfer member disposed inside the heat storage body and partitioning a heat transfer medium channel through which a heat transfer medium that exchanges heat with the heat storage body passes; and a flow channel member disposed inside the heat storage body and partitioning a reaction medium channel through which a reaction medium passes and which opens toward the heat storage body.

[0008] In this configuration, a flow channel member is arranged inside the heat storage body. A reaction medium flow channel is partitioned inside the flow channel member. The reaction medium flow channel opens toward the heat storage body. Therefore, the reaction medium can be supplied to the inside of the heat storage body through the reaction medium flow channel. Consequently, the reaction medium can easily diffuse throughout the entire heat storage body. In addition, the reaction medium can be recovered from inside the heat storage body through the reaction medium flow channel. Consequently, the reaction medium can be easily recovered from the entire heat storage body. In this way, this configuration can increase the reaction efficiency during heat storage and release. Therefore, the energy efficiency of the entire system equipped with a chemical heat storage device of this configuration (e.g., chemical heat pump, waste heat recovery and utilization system, engine warm-up system, etc.) can be increased.

[0009] (1-1) In the configuration of (1) above, it is preferable to further provide a support member that directly or indirectly supports the heat transfer member. Here, "directly supporting" means that the support member supports the heat transfer member without the need for other members. "Indirectly supporting" means that the support member supports the heat transfer member through other members (one or more).

[0010] In this configuration, the support member directly or indirectly supports the heat transfer member. Therefore, the heat transfer member is less likely to deform. Consequently, the position of the heat transfer member relative to the heat storage body does not change easily. Thus, during heat dissipation, heat can be easily recovered from the entire heat storage body to the heat transfer member. Also, during heat storage, heat can be easily supplied from the heat transfer member to the entire heat storage body. In this way, this configuration allows for high heat transfer efficiency during heat storage and release. Therefore, the overall energy efficiency of the system equipped with this chemical heat storage device can be increased.

[0011] (1-2) In any of the above configurations, it is preferable that a reaction medium channel is provided in the wall of the reactor, which connects the outside of the reactor to the housing and through which the reaction medium passes.

[0012] In this configuration, a reaction medium channel is provided in the wall of the reactor. The reaction medium channel opens toward the heat storage body in the containment section. Therefore, the reaction medium can be supplied to the outer surface of the heat storage body via the reaction medium channel. In addition, the reaction medium can be recovered from the outer surface of the heat storage body via the reaction medium channel.

[0013] (2) In order to solve the above problems, the chemical heat storage apparatus of the present disclosure comprises a reactor that partitions a storage section internally, a heat storage body disposed in the storage section, a heat transfer member disposed inside the heat storage body and partitioning a heat transfer medium channel through which a heat transfer medium that exchanges heat with the heat storage body passes, and a support member that directly or indirectly supports the heat transfer member, wherein a reaction medium channel is provided in the wall of the reactor that connects the outside of the reactor to the storage section and through which the reaction medium passes.

[0014] In this configuration, a reaction medium channel is provided in the wall of the reactor. The reaction medium channel opens toward the heat storage body in the containment section. Therefore, the reaction medium can be supplied to the outer surface of the heat storage body via the reaction medium channel. In addition, the reaction medium can be recovered from the outer surface of the heat storage body via the reaction medium channel.

[0015] Furthermore, in this configuration, the support member directly or indirectly supports the heat transfer member. Therefore, the heat transfer member is less likely to deform. Consequently, the position of the heat transfer member relative to the heat storage body does not change easily. Thus, during heat dissipation, heat can be easily recovered from the entire heat storage body to the heat transfer member. Also, during heat storage, heat can be easily supplied from the heat transfer member to the entire heat storage body. In this way, this configuration can increase the heat transfer efficiency during heat storage and release. Therefore, the overall energy efficiency of the system equipped with this chemical heat storage device can be increased.

[0016] (2-1) In the configuration of (2) above, it is preferable that the heat storage body does not have a flow channel member that partitions the reaction medium flow path through which the reaction medium passes and opens toward the heat storage body. With this configuration, the volume of the heat storage body, that is, the volume of the housing, can be reduced by the amount by which the flow channel member is not arranged. In addition, the number of parts of the chemical heat storage device can be reduced and the structure can be simplified. Also, the shape of the housing can be simplified compared to the case in which a flow channel member is arranged in the housing. As a result, the heat storage body can be filled to every corner of the housing. Consequently, the occurrence of dead space in the housing can be suppressed.

[0017] (2-2) In any of the above configurations, the support member is a direct support member that is placed inside the heat storage body and directly supports the heat transfer member, and it is preferable that the direct support member has a higher thermal conductivity than the heat storage body. With this configuration, heat can be rapidly exchanged between the heat transfer medium and the heat storage body via the support member.

[0018] (3) In the configuration of (1) above, the flow channel member is better configured to be one of the following (A) to (C): (A) A tubular flow channel member that partitions the reaction medium flow channel inside, has an outer surface in contact with the heat storage body, and the reaction medium flow channel opens to the outer surface. (B) A hollow plate-shaped flow channel member that partitions the reaction medium flow channel inside, has an outer surface in contact with the heat storage body, and the reaction medium flow channel opens to the outer surface. (C) A double tubular flow channel member that partitions an annular reaction medium flow channel inside, has an outer surface and an inner surface in contact with the heat storage body, and the reaction medium flow channel opens to the outer surface and the inner surface.

[0019] According to any of the configurations (A) to (C), the reaction medium can be supplied into the heat storage body via the reaction medium channel. Furthermore, the reaction medium can be recovered from inside the heat storage body. Note that (A) to (C) may be combined as appropriate. For example, (A) and (B), (A) and (C), (B) and (C), and (A), (B), and (C) may be used in combination.

[0020] (4) In any of the above configurations, the reactor is an inner vessel, the reaction medium flow path is an inner flow path that opens to the heat storage body at multiple locations, and further comprises a reaction medium supply member disposed outside the inner vessel and partitioning an outer flow path that communicates with the inner flow path, wherein the reaction medium supply member is preferably configured to be selected from the following (D) to (F): (D) An outer vessel that covers the inner vessel from the outside and partitions the outer flow path between its own inner surface and the outer surface of the inner vessel. (E) A double-tube outer manifold that covers the inner vessel from the outside and partitions the annular outer flow path inside. (F) An outer supply pipe that partitions the outer flow path inside.

[0021] In any of the configurations (D) to (F), the internal flow path opens to the heat storage body at multiple points. This makes it easy to diffuse the reaction medium throughout the heat storage body. It also makes it easy to recover the reaction medium from the entire heat storage body.

[0022] According to configuration (D), the outer surface of the inner container can be used to partition the outer flow path. That is, the inner container wall can be used to partition the inner storage area and the outer flow path on the outside. This provides excellent space-saving advantages. According to configuration (E), the outer flow path can be arranged independently of the inner container. This suppresses heat transfer between the heat storage body and the outer flow path via the inner container wall. In addition, an annular outer flow path can be arranged to surround the inner container. According to configuration (F), the outer flow path can be arranged independently of the inner container. This suppresses heat transfer between the heat storage body and the outer flow path via the inner container wall. Configurations (D) to (F) may be combined as appropriate. For example, (D) and (E), (D) and (F), (E) and (F), and (D) and (E) and (F) may be used in combination.

[0023] (5) In any of the above configurations, it is preferable that the number of passes of the heat transfer member to the heat storage body be one or more. For example, if the flow rate of the heat transfer medium is low, the number of passes should be increased. If the flow rate of the heat transfer medium is high, the number of passes should be decreased.

[0024] (6) In any of the above configurations, it is preferable that the volume of the storage portion is smaller than the volume of the heat storage body after expansion due to the chemical reaction. According to this configuration, it is possible to suppress the occurrence of dead space in the storage portion. Further, according to this configuration, when the heat storage body expands, the heat storage body can be pressed against the heat transfer member. Therefore, the heat transfer property between the heat transfer medium and the heat storage body can be enhanced. Further, according to this configuration, when the heat storage body expands, the heat storage body can be pressed against the opening of the reaction medium flow path. Therefore, the reaction efficiency can be increased.

Effects of the Invention

[0025] According to the chemical heat storage device of the present disclosure, at least one of the reaction efficiency and the heat transfer efficiency during heat storage and heat release can be increased. Therefore, the energy efficiency of the entire system can be increased.

Brief Description of the Drawings

[0026] [Figure 1] FIG. 1 is a perspective view of the chemical heat storage device of the first embodiment. [Figure 2] FIG. 2 is an exploded perspective view of the chemical heat storage device. [Figure 3] FIG. 3 is a partial transparent perspective view of the chemical heat storage device. [Figure 4] FIG. 4 is a combined perspective view of a plurality of heat transfer members and a plurality of direct support members of the chemical heat storage device. [Figure 5] FIG. 5 is an exploded perspective view of a plurality of heat transfer members and a plurality of direct support members of the chemical heat storage device. [Figure 6] FIG. 6 is a cross-sectional view of the chemical heat storage device in the front-rear direction. [Figure 7] FIG. 7 is an enlarged view within the frame VII of FIG. 6. [Figure 8] FIG. 8 is a cross-sectional view of the chemical heat storage device in the VIII-VIII direction of FIG. 6. [Figure 9] FIG. 9 is an enlarged view within the frame IX of FIG. 8. [Figure 10]Figure 10 is an exploded perspective view of the chemical heat storage device of the second embodiment. [Figure 11] Figure 11 is a partially transmitted perspective view of the chemical thermal energy storage device. [Figure 12] Figure 12 is a cross-sectional view of the chemical thermal energy storage device in the front-to-back direction. [Figure 13] Figure 13 is an enlarged view of the area within frame XIII in Figure 12. [Figure 14] Figure 14 is a cross-sectional view taken from XIV to XIV in Figure 12. [Figure 15] Figure 15 is an enlarged view of the area within frame XV in Figure 14. [Figure 16] Figure 16 is a cross-sectional view perpendicular to the axis of the chemical heat storage device of the third embodiment. [Figure 17] Figure 17 is a cross-sectional view perpendicular to the axis of the chemical heat storage device of the fourth embodiment. [Figure 18] Figure 18 is an enlarged view of the area within frame XVIII in Figure 17. [Figure 19] Figure 19 is a cross-sectional view perpendicular to the axis of the chemical heat storage device of the fifth embodiment. [Figure 20] Figure 20 is a cross-sectional view perpendicular to the axis of the chemical heat storage device of the sixth embodiment. [Figure 21] Figure 21 is a cross-sectional view perpendicular to the axis of the chemical heat storage device of the seventh embodiment. [Figure 22] Figure 22 is a cross-sectional view perpendicular to the axis of the chemical heat storage device of the eighth embodiment. [Figure 23] Figure 23 is a cross-sectional view of the chemical heat storage device according to the ninth embodiment, in the front-to-back direction. [Figure 24] Figure 24 is a cross-sectional view of the chemical heat storage device according to the tenth embodiment, in the front-to-back direction. [Figure 25] Figures 25(A) to 25(G) are partial cross-sectional views perpendicular to the axial direction of other embodiments (1 to 7) of chemical heat storage devices. [Modes for carrying out the invention]

[0027] Embodiments of the chemical heat storage device of this disclosure will be described below. In the following figures, the front-to-back direction corresponds to the axial direction of the inner container and the outer container. At least one of the up-and-down direction and the left-to-right direction corresponds to the axial direction (direction perpendicular to the axial direction; cross-sectional direction; radial direction) of the inner container and the outer container.

[0028] <First Embodiment> Figure 1 shows a perspective view of the chemical heat storage device of this embodiment. Figure 2 shows an exploded perspective view of the same chemical heat storage device. Figure 3 shows a partially transmitted perspective view of the same chemical heat storage device. Figure 4 shows a combined perspective view of the multiple heat transfer members and multiple direct support members of the same chemical heat storage device. Figure 5 shows an exploded perspective view of the multiple heat transfer members and multiple direct support members of the same chemical heat storage device. Figure 6 shows a cross-sectional view of the chemical heat storage device in the front-rear direction (axial direction). Figure 7 shows an enlarged view of the area within frame VII of Figure 6. Figure 8 shows a cross-sectional view of Figure 6 in the direction VIII-VIII (perpendicular to the axis). Figure 9 shows an enlarged view of the area within frame IX of Figure 8. Note that Figure 6 corresponds to the cross-sectional view in the direction VI-VI of Figure 8.

[0029] In Figure 1, the inner container 2, heat transfer member mounting plate 81, and indirect support member 87 inside the outer container 3 are shown by dotted lines. In Figure 3, the components (heat transfer member 5, tubular flow channel member 6, direct support member 7) inside the inner container 2 (housing section 22) are shown through the inner container 2, heat transfer member mounting plate 81, and indirect support member 87. The heat storage body 4 is omitted. In Figures 6 and 7, the tubular flow channel member 6 on the far side (left side) is shown through the heat storage body 4.

[0030] [Configuration of a chemical thermal storage system] First, the configuration of the chemical heat storage device 1 of this embodiment will be described. As shown in Figures 1 to 9, the chemical heat storage device 1 of this embodiment comprises an inner container 2, an outer container 3, a heat storage body 4, a plurality of heat transfer members 5, a plurality of tubular flow path members 6, a plurality of direct support members 7, a reaction medium supply and discharge pipe 80, a heat transfer member mounting plate 81, a heat medium supply and discharge pipe 82, a partition wall 83, a heat medium supply pipe 84, a heat medium discharge pipe 85, an end plate 86, a plurality of indirect support members 87, and two legs 88. The direct support members 7 and the indirect support members 87 are included in the concept of "support members" in this disclosure.

[0031] (Inner container 2) As shown in Figures 2, 6, and 8, the inner vessel (reactor) 2 is made of metal, extends in the front-to-back direction (horizontal direction), and has a bottomed cylindrical shape that opens to the front. That is, the central axis A1 of the cross-section perpendicular to the inner vessel 2 (see Figures 6 and 8) extends in the front-to-back direction.

[0032] The inner container 2 comprises a side circumferential wall portion 20, an end wall portion 21, and a housing portion 22. The side circumferential wall portion 20 has a cylindrical shape extending in the front-rear direction. The end wall portion 21 seals the rear end opening of the side circumferential wall portion 20.

[0033] As shown in Figures 1, 6, and 8, the side perimeter wall portion 20 is provided with a plurality of mounting holes 200. The mounting holes 200 penetrate the side perimeter wall portion 20 in the vertical direction. The plurality of mounting holes 200 are arranged along the entire length of the side perimeter wall portion 20 in the front-rear direction. The plurality of mounting holes 200 are arranged in the upper and lower portions of the side perimeter wall portion 20. In each of the upper and lower portions, the plurality of mounting holes 200 are arranged in two rows (the extension direction is in the front-rear direction, and the juxtaposition direction is in the left-right direction). The housing portion 22 is partitioned inside the inner container 2.

[0034] (Outer container 3, legs 88) As shown in Figures 1, 2, 6, and 8, the outer container 3 is made of metal, extends in the front-to-back direction, and has a bottomed cylindrical shape that opens to the front. That is, the central axis A2 (see Figures 6 and 8) of the cross-section perpendicular to the axial direction of the outer container 3 extends in the front-to-back direction. The outer container 3 covers the inner container 2 from the outside (radially outward and rear (one axial side) centered on the central axes A1 and A2). The central axes A1 and A2 coincide. That is, the outer container 3 is arranged coaxially with the inner container 2.

[0035] The outer container 3 comprises a side circumferential wall portion 30 and an end wall portion 31. The side circumferential wall portion 30 has a cylindrical shape extending in the front-rear direction. The end wall portion 31 seals the rear end opening of the side circumferential wall portion 30. The end wall portion 31 is provided with a mounting hole 310. The mounting hole 310 penetrates the radial center of the end wall portion 31 in the front-rear direction along the central axis A2.

[0036] The outer container 3 defines the outer channel 32. Specifically, the outer channel 32 is defined between the inner surface of the outer container 3 and the outer surface of the inner container 2. As shown in Figure 8, in a cross-section perpendicular to the axial direction, the outer channel 32 exhibits an annular shape centered on the central axis A2.

[0037] As shown in Figure 1, the two legs 88 are positioned at both the front and rear ends of the outer container 3. The two legs 88 are erected on the factory floor (not shown). The two legs 88 support the outer container 3, i.e., the chemical heat storage device 1, from below.

[0038] (Heat storage element 4) As shown in Figures 6, 8, and 9, the heat storage body 4 is filled into the housing section 22. The heat storage body 4 contains heat storage material particles made of a chemical heat storage material (calcium oxide after dehydration, calcium hydroxide after hydration) and clay minerals. The heat storage body 4 can expand and contract through chemical reactions (hydration reaction, dehydration reaction) with water vapor (H2O). Water vapor is included in the concept of "reaction medium" in this disclosure.

[0039] The volume of the housing section 22 (more specifically, the portion of the housing section 22 in which the components (multiple heat transfer members 5, multiple tubular flow channel members 6, and multiple direct support members 7) are not arranged) is smaller than the volume of the heat storage body 4 after expansion due to the hydration reaction. Therefore, after expansion (after the hydration reaction), the heat storage body 4 is in pressure contact with the inner surface of the inner container 2 (the surface that partitions the housing section 22), the outer surfaces of the multiple heat transfer members 5 (described later), the outer surfaces of the multiple tubular flow channel members 6, and the outer surfaces of the multiple direct support members 7. In other words, the heat storage body 4 is constrained by these components.

[0040] (Heat transfer component 5) As shown in Figures 3 to 9, the heat transfer member 5 is made of metal and has a U-shaped cylindrical form. That is, the heat transfer member 5 comprises two straight pipe sections 50 and a curved pipe section 51. The straight pipe sections 50 extend in the front-rear direction. The two straight pipe sections 50 are arranged opposite each other in the vertical direction. The curved pipe section 51 extends in a C-shape that bulges towards the rear. The curved pipe section 51 connects the rear ends of the two straight pipe sections 50.

[0041] The heat transfer member 5 is housed in the housing section 22, except for its front end (the portion fixed to the mounting hole 810 of the heat transfer member mounting plate 81, which will be described later). The heat transfer member 5 is positioned inside the heat storage body 4. The outer surface of the heat transfer member 5 is in contact with the heat storage body 4. The heat transfer member 5 has a heat transfer medium channel 52 inside. The heat transfer medium can flow through the heat transfer medium channel 52. The heat transfer medium exchanges heat with the heat storage body 4 through the wall portion of the heat transfer member 5. As shown in Figure 8, in the housing section 22, the straight pipe portions 50 of the multiple heat transfer members 5 are arranged in the vertical, horizontal, and vertical directions. As shown in Figure 6, the multiple heat transfer members 5 are arranged throughout the entire housing section 22 (i.e., the heat storage body 4).

[0042] (Tubular flow channel member 6) As shown in Figures 3, 6 to 9, the tubular flow channel member 6 is made of metal and has a straight tubular shape extending in the vertical direction. Any single tubular flow channel member 6 is attached to a pair of mounting holes 200 of the inner container 2 (a pair of mounting holes 200 that are opposite each other in the vertical direction, as shown in Figure 8).

[0043] The tubular flow channel member 6 is housed in the housing section 22, except for its upper and lower ends (the parts fixed to the mounting holes 200). The tubular flow channel member 6 is positioned inside the heat storage body 4. The outer surface of the tubular flow channel member 6 is in contact with the heat storage body 4.

[0044] As shown in Figure 8, the tubular flow channel member 6 has an inner flow channel (reaction medium flow channel) 60 inside. The inner flow channel 60 has two outer openings 600 and a plurality of inner openings 601. The two outer openings 600 are provided at both the upper and lower ends of the tubular flow channel member 6. That is, the two outer openings 600 open to the outside of the inner container 2 (outer flow channel 32) through the mounting holes 200 of the inner container 2. The plurality of inner openings 601 are provided in the wall portion of the tubular flow channel member 6 (the portion located in the housing portion 22). As shown in Figure 9, the inner openings 601 open toward the heat storage body 4. The size (diameter) of the inner openings 601 is set to allow water vapor to pass through, but to be large enough that the heat storage material particles of the heat storage body 4 cannot easily pass through.

[0045] As shown in Figures 7 and 8, the multiple inner openings 601 are distributed throughout the entire wall of the tubular flow channel member 6. Furthermore, the multiple inner openings 601 are distributed along the entire vertical length of the heat storage body 4. Water vapor can pass through the inner flow channels 60. The water vapor is supplied to the heat storage body 4 through the inner openings 601. Conversely, the water vapor is discharged from the heat storage body 4 through the inner openings 601. As shown in Figures 3, 6, and 8, in the housing section 22, the multiple tubular flow channel members 6 are arranged in the front-to-back and left-to-right directions. The multiple tubular flow channel members 6 are arranged throughout the entire housing section 22 (i.e., the heat storage body 4).

[0046] (Direct support member 7) As shown in Figures 3 to 6, the direct support member 7 is made of metal and has a disc shape that extends in the vertical direction. The direct support member 7 is positioned in the housing section 22. The outer circumferential surface of the direct support member 7 is in contact with the inner surface of the side circumferential wall portion 20 of the inner container 2 (the surface that defines the housing section 22).

[0047] As shown in Figure 6, the multiple direct support members 7 are arranged side by side in the front-to-back direction, spaced apart at predetermined intervals. The multiple direct support members 7 divide the housing section 22 into multiple rooms 220 arranged in the front-to-back direction. The direct support members 7 are provided with multiple support holes 70. The support holes 70 penetrate the direct support members 7 in the front-to-back direction. The straight pipe section 50 of the heat transfer member 5 is inserted through the support holes 70. The support holes 70, and thus the direct support members 7, directly support the heat transfer member 5. Furthermore, the direct support members 7 directly position the heat transfer member 5.

[0048] (Reaction medium supply and discharge pipe 80) As shown in Figures 1, 2, and 6, the reaction medium supply and discharge pipe 80 is made of metal and has a short-axis circular shape. The reaction medium supply and discharge pipe 80 is attached to the mounting hole 310 in the end wall portion 31 of the outer container 3. Water vapor is supplied from outside the outer container 3 to the outer flow path 32 via the reaction medium supply and discharge pipe 80. Also, water vapor is discharged from the outer flow path 32 to the outside of the outer container 3 via the reaction medium supply and discharge pipe 80.

[0049] (Heat transfer component mounting plate 81) As shown in Figures 1 to 3 and Figure 6, the heat transfer member mounting plate 81 is made of metal and has a disc shape extending in the vertical, horizontal, and vertical directions. The heat transfer member mounting plate 81 is positioned on the front side of the inner container 2 and the outer container 3. The heat transfer member mounting plate 81 seals the front openings of the inner container 2 and the outer container 3. The heat transfer member mounting plate 81 has a plurality of mounting holes 810. The mounting holes 810 penetrate the heat transfer member mounting plate 81 in the front-to-back direction. The front end of the straight pipe section 50 of the heat transfer member 5 is attached to the mounting holes 810. The mounting holes 810, that is, the heat transfer member mounting plate 81, support the heat transfer member 5. The heat transfer member mounting plate 81 also fixes the heat transfer member 5 in place.

[0050] (Heat medium supply / discharge pipe 82) As shown in Figures 1, 2, and 6, the heat transfer medium supply and discharge pipe 82 is made of metal and has a short-axis cylindrical shape extending in the front-rear direction. The heat transfer medium supply and discharge pipe 82 is located in front of the heat transfer member mounting plate 81. The heat transfer member mounting plate 81 seals the rear end opening of the heat transfer medium supply and discharge pipe 82. The heat transfer medium supply and discharge pipe 82 is located on the central axes A1 and A2. The heat transfer medium supply and discharge pipe 82 has two mounting holes 820. The mounting holes 820 penetrate the wall of the heat transfer medium supply and discharge pipe 82 in the vertical direction. The two mounting holes 820 are located opposite each other in the vertical direction.

[0051] (bulkhead 83) As shown in Figures 2 and 6, the partition wall 83 is made of metal and has a flat plate shape extending in the front-rear, left-right, and right directions (horizontal direction). The partition wall 83 divides the internal space of the heat transfer medium supply and discharge cylinder 82 into a lower supply chamber 830 and an upper discharge chamber 831. The supply chamber 830 communicates with the lower mounting hole 820, and the discharge chamber 831 communicates with the upper mounting hole 820. One end (upstream end) of the heat transfer medium flow path 52 of the heat transfer member 5 communicates with the supply chamber 830. The other end (downstream end) of the heat transfer medium flow path 52 of the heat transfer member 5 communicates with the discharge chamber 831.

[0052] (heat medium supply pipe 84, heat medium discharge pipe 85, end plate 86) As shown in Figures 1, 2, and 6, the heat transfer medium supply pipe 84 is made of metal and has a short-axis circular shape. The heat transfer medium supply pipe 84 is attached to the lower mounting hole 820 of the heat transfer medium supply and discharge pipe 82. The heat transfer medium is supplied to the supply chamber 830 from outside the heat transfer medium supply and discharge pipe 82 via the heat transfer medium supply pipe 84. The heat transfer medium discharge pipe 85 is made of metal and has a short-axis circular shape. The heat transfer medium discharge pipe 85 is attached to the upper mounting hole 820 of the heat transfer medium supply and discharge pipe 82. The heat transfer medium is discharged from the discharge chamber 831 to the outside of the heat transfer medium supply and discharge pipe 82 via the heat transfer medium discharge pipe 85. The end plate 86 is made of metal and has a disc shape that extends in the vertical, horizontal, and vertical directions. The end plate 86 seals the front end opening of the heat transfer medium supply and discharge pipe 82.

[0053] (Indirect support member 87) As shown in Figures 1-3 and 6-8, the indirect support member 87 is made of metal and has a gear-like annular shape extending in the vertical, horizontal, and vertical directions. The indirect support member 87 is positioned between the outer surface of the side circumferential wall portion 20 of the inner container 2 and the inner surface of the side circumferential wall portion 30 of the outer container 3. The indirect support member 87 ensures an outer flow path 32 between the outer surface of the side circumferential wall portion 20 of the inner container 2 and the inner surface of the side circumferential wall portion 30 of the outer container 3. Multiple indirect support members 87 are arranged at predetermined intervals in the front-rear direction. Multiple openings 870 that are recessed radially inward are arranged on the outer circumferential surface of the indirect support member 87. Multiple openings 870 are arranged at predetermined intervals in the circumferential direction. Each part of the outer flow path 32 communicates with each other in the front-rear direction through the openings 870. The indirect support member 87 supports the inner container 2. The indirect support member 87 also positions the inner container 2. Furthermore, the indirect support member 87 indirectly supports the heat transfer member 5 via the inner container 2 and the direct support member 7. In addition, the indirect support member 87 indirectly positions the heat transfer member 5 via the inner container 2 and the direct support member 7.

[0054] (Reaction medium route R1, heat medium route R2) As shown in Figures 6 to 9, a reaction medium route R1 for water vapor is set up between the outside of the chemical heat storage device 1 and the heat storage body 4 in the storage section 22, passing through the reaction medium supply and discharge pipe 80, the outer flow path 32, and the inner flow path 60, from the outside toward the heat storage body 4.

[0055] As shown in Figure 6, a heat transfer medium route R2 is set up between the heat transfer medium supply pipe 84 and the heat transfer medium discharge pipe 85, passing through the supply chamber 830, the heat transfer medium flow path 52, and the discharge chamber 831, from the heat transfer medium supply pipe 84 to the heat transfer medium discharge pipe 85.

[0056] [Operation of chemical thermal storage devices] Next, the operation of the chemical heat storage device 1 of this embodiment will be described. As mentioned above, the heat storage body 4 contains heat storage material particles made of a chemical heat storage material (calcium oxide after dehydration, and calcium hydroxide after hydration) and clay minerals. Here, a granular material containing multiple heat storage material particles is referred to as "heat storage material granules". The state in which the heat storage body 4 contained in the storage section 22 has not yet undergone a hydration reaction is referred to as the "initial state".

[0057] (During heat dissipation and hydration reactions) In its initial state, the heat storage material particles in the heat storage material granules of the heat storage body 4 are made of calcium oxide. During heat release, water vapor is supplied to the entire heat storage body 4 via the reaction medium route R1 shown in Figures 6 to 9. Upon supply of water vapor, the chemical heat storage material (calcium oxide) of the heat storage body 4 releases heat through the following hydration reaction and becomes calcium hydroxide. Note that Q1 is the amount of heat released. CaO + H2O → Ca(OH)2 + Q1 Due to the hydration reaction, the heat storage body 4 expands and presses against the inner surface of the inner container 2 (the surface that partitions the storage section 22), the outer surface of the heat transfer member 5, the outer surface of the tubular flow channel member 6, and the outer surface of the direct support member 7. In other words, the heat storage body 4 is restrained by these members.

[0058] The heat Q1 generated by the hydration reaction moves to the heat transfer medium in the heat transfer medium channel 52 via the heat storage body 4, the direct support member 7, and the walls of the heat transfer member 5. The heat transfer medium heated by the heat Q1 flows out to the outside via the heat transfer medium route R2.

[0059] (During heat storage and dehydration reactions) During heat storage, a high-temperature heat transfer medium is flowed through the heat transfer medium route R2 shown in Figures 6 to 9. The heat from the heat transfer medium is transferred to the heat storage body 4 via the wall of the heat transfer member 5 and the direct support member 7. The chemical heat storage material (calcium hydroxide) in the heat storage body 4, heated by this heat, stores heat through the following dehydration reaction and becomes calcium oxide. Note that Q2 is the amount of heat stored. Ca(OH)2 + Q2 → CaO + H2O The water vapor (H2O) generated by the dehydration reaction is discharged to the outside of the chemical heat storage device 1 via the reaction medium route R1 (opposite direction to the arrows shown in Figures 6 and 7).

[0060] [Effects and Effects] Next, the effects of the chemical heat storage device 1 of this embodiment will be described. As shown in Figures 6 to 9, according to the chemical heat storage device 1 of this embodiment, the tubular flow channel member 6 is arranged inside the heat storage body 4. Inside the tubular flow channel member 6, an inner flow channel 60 is partitioned. The inner opening 601 of the inner flow channel 60 opens toward the heat storage body 4. Therefore, water vapor can be supplied to the inside of the heat storage body 4 via the inner flow channel 60. As a result, water vapor can easily diffuse throughout the heat storage body 4. In addition, water vapor can be recovered from the inside of the heat storage body 4 via the inner flow channel 60. As a result, water vapor can be easily recovered from the entire heat storage body 4. In this way, according to the chemical heat storage device 1 of this embodiment, the reaction efficiency during heat storage and release can be increased. As a result, the energy efficiency of the entire system equipped with the chemical heat storage device 1 of this embodiment (for example, a chemical heat pump, a waste heat recovery and utilization system, an engine warm-up system, etc.) can be increased.

[0061] As shown in Figures 3 to 7, the chemical heat storage device 1 of this embodiment is equipped with a direct support member 7 inside the heat storage body 4. The direct support member 7 directly supports the heat transfer member 5. Therefore, the heat transfer member 5 is less likely to deform. Specifically, the heat transfer member 5 is less likely to bend downward in a cantilever shape with its front end (the part fixed to the heat transfer member mounting plate 81) as the pivot point. Therefore, the position of the heat transfer member 5 relative to the heat storage body 4 is less likely to change, and a gap is less likely to occur between the heat storage body 4 and the heat transfer member 5. Thus, during heat release, it is easier to recover heat from the entire heat storage body 4 to the heat transfer member 5. Also, during heat storage, it is easier to supply heat from the heat transfer member 5 to the entire heat storage body 4. In this way, the chemical heat storage device 1 of this embodiment can increase the heat transfer efficiency during heat storage and release. Therefore, the energy efficiency of the entire system equipped with the chemical heat storage device 1 of this embodiment can be increased.

[0062] As shown in Figures 1 to 3 and Figures 6 to 8, the chemical heat storage device 1 of this embodiment is equipped with an indirect support member 87 between the inner container 2 and the outer container 3. The indirect support member 87 supports the inner container 2. Therefore, the inner container 2 is less likely to deform. Specifically, the inner container 2 is less likely to bend downward in a cantilevered manner, with its front end (the part fixed to the heat transfer member mounting plate 81) as the pivot point. Consequently, it is possible to suppress variations in the flow area of ​​the annular outer flow path 32 shown in Figure 8 (the upper part becomes wider and the lower part becomes narrower).

[0063] Furthermore, when the inner container 2 is supported in a cantilevered manner, the structure of the inner container 2 itself needs to be made thicker in order to suppress the curvature of the inner container 2. This increases heat loss. In contrast, when the indirect support member 87 is provided, it is not necessary to make the structure of the inner container 2 itself thicker. Therefore, heat loss can be reduced.

[0064] As shown in Figures 6 and 7, the indirect support member 87 indirectly supports the heat transfer member 5 via the inner container 2 and the direct support member 7. Therefore, the position of the heat transfer member 5 relative to the heat storage body 4 does not change easily. Thus, during heat dissipation, heat can be easily recovered from the entire heat storage body 4 to the heat transfer member 5. Also, during heat storage, heat can be easily supplied from the heat transfer member 5 to the entire heat storage body 4. Therefore, the heat transfer efficiency during heat storage and dissipation can be increased. Furthermore, the indirect support member 87 and the direct support member 7 are aligned radially via the side peripheral wall portion 20. Therefore, the positioning accuracy of the heat transfer member 5 is high.

[0065] As shown in Figures 3, 6 to 9, the chemical heat storage device 1 of this embodiment is equipped with a tubular flow channel member 6. The tubular flow channel member 6 is straight. Therefore, the flow resistance of the inner flow channel 60 is small. Water vapor can be supplied to the inside of the heat storage body 4 through the inner flow channel 60. In addition, water vapor can be recovered from the inside of the heat storage body 4. The tubular flow channel member 6 extends in the vertical direction. Therefore, the tubular flow channel member 6 and the straight pipe section 50 of the heat transfer member 5 can be arranged to be perpendicular to each other.

[0066] As shown in Figures 6 to 9, the inner flow path 60 is provided with multiple inner openings 601. That is, the inner flow path 60 opens to the heat storage body 4 at multiple locations. This makes it easy to diffuse water vapor throughout the heat storage body 4. It also makes it easy to recover water vapor from the entire heat storage body 4.

[0067] Furthermore, the multiple inner openings 601 are distributed at predetermined intervals across the entire wall portion of the tubular flow channel member 6 (the portion located in the housing portion 22). Additionally, the multiple inner openings 601 are distributed at predetermined intervals across the entire vertical length of the heat storage body 4. This facilitates the diffusion of water vapor throughout the heat storage body 4 and also facilitates the recovery of water vapor from the entire heat storage body 4.

[0068] As shown in Figures 1, 2, and 6-9, the chemical heat storage device 1 of this embodiment includes an outer container 3. Therefore, the outer surface of the inner container 2 can be used to partition the outer flow path 32. That is, the inner storage section 22 and the outer flow path 32 can be partitioned on the outside, separated by the walls of the inner container 2 (side peripheral wall section 20, end wall section 21). Therefore, it is excellent in terms of space saving.

[0069] As shown in Figures 6 to 8, multiple heat transfer members 5 are arranged in the housing section 22. This allows for a larger surface area for the heat transfer members 5. Consequently, the heat transfer efficiency between the heat transfer medium and the heat storage body 4 can be increased.

[0070] The volume of the housing section 22 shown in Figures 6 to 8 is smaller than the volume of the heat storage body 4 after expansion due to the hydration reaction. Therefore, the occurrence of dead space in the housing section 22 can be suppressed. In addition, when the heat storage body 4 expands, it can be pressed against the heat transfer member 5. Therefore, the heat transfer between the heat transfer medium and the heat storage body 4 can be increased. In addition, when the heat storage body 4 expands, it can be pressed against the inner opening 601 of the inner flow path 60. Therefore, the reaction efficiency can be increased.

[0071] As shown in Figure 3, multiple heat transfer members 5, multiple tubular flow channel members 6, and multiple direct support members 7 are intricately arranged inside the inner container 2 (container section 22). Therefore, the shape of the containment section 22 is complex. In this regard, the heat storage body 4 in its initial state is an aggregate (powder) of heat storage material granules. Therefore, when the heat storage body 4 expands from its initial state during the first heat release (hydration reaction), the heat storage material granules are appropriately crushed (for example, the heat storage material granules break down into lumps (a combination of multiple heat storage material particles) or individual heat storage material particles), and can spread to every corner of the containment section 22 along its shape. Thus, despite the complex shape of the containment section 22, the occurrence of dead space in the containment section 22 can be suppressed.

[0072] Furthermore, because the heat storage body 4 expands while being moderately crushed, the expansion pressure can be reduced compared to the case where the heat storage body 4 is a molded body (a pressed and fired body of heat storage material particles or heat storage material granules; the concept of "heat storage body" in this disclosure also includes such molded bodies). Therefore, it is not necessary to provide excessive pressure-resistant structures (for example, increasing the wall thickness of the wall, reinforcement, changing the material, etc.) to each component (heat transfer member 5, tubular flow channel member 6, direct support member 7) arranged in the inner container 2 and the housing section 22.

[0073] <Second Embodiment> The main difference between the chemical heat storage device of this embodiment and the chemical heat storage device of the first embodiment is that the inner container is U-shaped rather than straight. Also, there are no tubular flow channel members. Furthermore, there are no direct support members. Here, we will mainly explain the differences.

[0074] Figure 10 shows an exploded perspective view of the chemical heat storage device of this embodiment. Figure 11 shows a partially transmitted perspective view of the same chemical heat storage device. Figure 12 shows a cross-sectional view of the same chemical heat storage device in the front-to-back direction (axial direction). Figure 13 shows an enlarged view of the area within frame XIII in Figure 12. Figure 14 shows a cross-sectional view of Figure 12 in the XIV-XIV direction (perpendicular to the axis). Figure 15 shows an enlarged view of the area within frame XV in Figure 14. Note that Figure 12 corresponds to the cross-sectional view in the XII-XII direction in Figure 14.

[0075] In these figures, parts corresponding to Figure 2 (corresponding to Figure 10), Figure 3 (corresponding to Figure 11), Figure 6 (corresponding to Figure 12), Figure 7 (corresponding to Figure 13), Figure 8 (corresponding to Figure 14), and Figure 9 (corresponding to Figure 15) are indicated by the same reference numerals. Also, in Figure 11, the opening 201 is depicted only in a part of the side peripheral wall portion 20 of the inner container 2, but as will be described later, the opening 201 is arranged throughout the entire side peripheral wall portion 20 (the portion that partitions the housing portion 22). Furthermore, in Figure 11, the inner container 2 is shown through the indirect support member 87.

[0076] As shown in Figures 10 to 15, the inner container 2 is made of metal and has a U-shaped cylindrical form. That is, the side circumferential wall portion 20 of the inner container 2 comprises two straight cylindrical portions 23 and a curved cylindrical portion 24. The side circumferential wall portion 20 is included in the concept of "wall portion" in this disclosure. The straight cylindrical portions 23 extend in the front-rear direction. The two straight cylindrical portions 23 are arranged opposite each other in the vertical direction. The curved cylindrical portion 24 extends in a C-shape that bulges towards the rear. The curved cylindrical portion 24 connects the rear ends of the two straight cylindrical portions 23.

[0077] As shown in Figure 11, the side perimeter wall portion 20 has a mesh-like structure overall. That is, multiple openings 201 are provided throughout the side perimeter wall portion 20. The openings 201 are included in the concept of "reaction medium flow path" in this disclosure. The openings 201 connect the outside of the inner container 2 (outer flow path 32) to the housing portion 22. The size (diameter) of the openings 201 is set to allow water vapor to pass through, but to be large enough that the heat storage material particles of the heat storage body 4 cannot easily pass through.

[0078] As shown in Figure 12, the heat transfer member 5 has a U-shaped cylindrical form. The heat transfer member 5 is housed in the housing section 22, except for the front end (the part fixed to the mounting hole 810 of the heat transfer member mounting plate 81). Specifically, the straight pipe section 50 is located radially inward of the straight pipe section 23. The curved pipe section 51 is located radially inward of the curved pipe section 24.

[0079] As shown in Figures 10 to 14, the multiple indirect support members 87 are arranged at predetermined intervals in the front-rear direction. Each indirect support member 87 has two support holes 871, one above the other. The support holes 871 penetrate the indirect support member 87 in the front-rear direction. Two straight cylindrical portions 23 of the inner container 2 are inserted through the two support holes 871. The two support holes 871, i.e., the indirect support member 87, support the two straight cylindrical portions 23. The indirect support member 87 also positions the two straight cylindrical portions 23. Furthermore, the indirect support member 87 indirectly supports the heat transfer member 5 via the inner container 2.

[0080] As shown in Figures 12 to 15, a reaction medium route R1 for water vapor is set up between the outside of the chemical heat storage device 1 and the heat storage body 4 in the storage section 22, passing through the reaction medium supply and discharge pipe 80, the outer flow path 32, and the opening 201, from the outside toward the heat storage body 4.

[0081] As shown in Figure 12, a heat transfer medium route R2 is set up between the heat transfer medium supply pipe 84 and the heat transfer medium discharge pipe 85, passing through the supply chamber 830, the heat transfer medium flow path 52, and the discharge chamber 831, from the heat transfer medium supply pipe 84 to the heat transfer medium discharge pipe 85.

[0082] The chemical heat storage device 1 of this embodiment and the chemical heat storage device of the first embodiment have similar effects and advantages in respect of the parts that are common to each other. As shown in Figures 11, 13, and 14, a number of openings 201 are provided in the side peripheral wall portion 20 of the inner container 2. The openings 201 open toward the heat storage body 4 of the housing portion 22. Therefore, water vapor can be supplied to the outer surface of the heat storage body 4 through the openings 201. In addition, water vapor can be recovered from the outer surface of the heat storage body 4 through the openings 201.

[0083] As shown in Figure 15, the housing section 22 does not contain the tubular flow channel member 6 and the direct support member 7 shown in Figure 8. Therefore, the volume of the housing section 22 can be reduced. In addition, the number of parts of the chemical heat storage device 1 can be reduced and the structure can be simplified.

[0084] Furthermore, compared to the case where a tubular flow channel member 6 and a direct support member 7 are arranged in the housing section 22, the shape of the housing section 22 can be simplified. As a result, the heat storage body 4 can be filled to every corner of the housing section 22. Therefore, the occurrence of dead space in the housing section 22 can be suppressed.

[0085] As shown in Figures 13 and 14, the multiple openings 201 are distributed at predetermined intervals across the entire side periphery wall 20 of the inner container 2 (the portion that partitions the storage area 22). This makes it easy to diffuse water vapor throughout the heat storage body 4. It also makes it easy to recover water vapor from the entire heat storage body 4.

[0086] As shown in Figures 10 to 14, the indirect support member 87 indirectly supports the heat transfer member 5 via the inner container 2 and the heat storage body 4. In other words, the indirect support member 87 indirectly supports the heat storage body 4 and the heat transfer member 5 via the inner container 2. Therefore, the position of the heat transfer member 5 relative to the heat storage body 4 does not change easily. Thus, it is easy to recover heat from the entire heat storage body 4 to the heat transfer member 5. Also, it is easy to supply heat from the heat transfer member 5 to the entire heat storage body 4. In this way, the chemical heat storage device 1 of this embodiment can increase the reaction efficiency during heat storage and release. Therefore, the energy efficiency of the entire system equipped with the chemical heat storage device 1 of this embodiment (for example, a chemical heat pump, a waste heat recovery and utilization system, an engine warm-up device, etc.) can be increased.

[0087] Furthermore, the inner container 2 has numerous openings 201. As a result, the inner container 2 has low strength. Consequently, the inner container 2 is prone to deformation over time due to volume changes (expansion and contraction) of the heat storage body 4 associated with heat storage and release, the weight of the heat storage body 4, and the weight of the inner container 2. When the inner container 2 deforms, the position of the heat transfer member 5 relative to the heat storage body 4 changes. However, the inner container 2 is reinforced and supported by an indirect support member 87. As a result, the inner container 2 is less prone to deformation. Consequently, the position of the heat transfer member 5 relative to the heat storage body 4 does not change easily. Therefore, the reaction efficiency during heat storage and release can be increased.

[0088] <Third Embodiment> The main difference between the chemical heat storage device of this embodiment and the chemical heat storage device of the first embodiment is that the tubular flow channel member extends in the front-to-back direction rather than the up-and-down direction. This section will primarily explain the differences.

[0089] Figure 16 shows a cross-sectional view perpendicular to the axis of the chemical heat storage device of this embodiment. Note that parts corresponding to those in Figure 8 are indicated by the same reference numerals. The heat transfer member 5 comprises two straight pipe sections 50 and a curved pipe section 51. The straight pipe sections 50 extend in the front-rear direction. The two straight pipe sections 50 are arranged opposite each other in the upper-left to lower-right direction. As shown by the dashed line in Figure 16, the curved pipe section 51 connects the rear ends of the two straight pipe sections 50.

[0090] The tubular flow channel member 6 has a bottomed, straight tubular shape that extends in the front-rear direction. The two tubular flow channel members 6 are arranged opposite each other in the upper-right to lower-left direction. As shown in Figure 6 above, the front end of the tubular flow channel member 6 is inserted into and fixed in the mounting hole 810 of the heat transfer member mounting plate 81. However, this front end is sealed. Therefore, the inner flow channel 60 inside the tubular flow channel member 6 is isolated from the supply chamber 830 and discharge chamber 831 (i.e., the heat transfer medium route R2) shown in Figure 6. The rear end of the tubular flow channel member 6 penetrates the end wall portion 21 of the inner container 2 shown in Figure 6.

[0091] The tubular flow channel member 6 is housed in the housing section 22, except for its front and rear ends. The tubular flow channel member 6 is positioned inside the heat storage body 4. The outer surface of the tubular flow channel member 6 is in contact with the heat storage body 4. The outer opening 600 is provided at the rear end of the tubular flow channel member 6. The outer opening 600 opens into the outer flow channel 32 (the portion between the end wall sections 21 and 31) shown in Figure 6. Multiple inner openings 601 are distributed throughout the entire wall portion of the tubular flow channel member 6 (the portion located in the housing section 22). Furthermore, multiple inner openings 601 are distributed along the entire length of the heat storage body 4 in the front-rear direction.

[0092] Multiple direct support members 7 are arranged side by side in the front-to-back direction, spaced apart at predetermined intervals. Each direct support member 7 is provided with four support holes 70. The support holes 70 penetrate the direct support member 7 in the front-to-back direction. The four support holes 70 are positioned at the vertices of a square when viewed from the front. A straight pipe section 50 of the heat transfer member 5 is inserted through each of the two support holes 70 at one diagonal position. A tubular flow channel member 6 is inserted through each of the two support holes 70 at the other diagonal position.

[0093] The chemical heat storage device 1 of this embodiment and the chemical heat storage device of the first embodiment have similar effects and advantages with respect to the parts that share a common configuration. The tubular flow channel member 6 extends in the front-rear direction. Therefore, the tubular flow channel member 6 and the straight pipe section 50 of the heat transfer member 5 can be arranged parallel to each other.

[0094] The direct support member 7 supports the heat transfer member 5 and the tubular flow channel member 6. Therefore, the heat transfer member 5 and the tubular flow channel member 6 are less likely to deform. Consequently, the relative positional relationship between the heat storage body 4, the heat transfer member 5, and the tubular flow channel member 6 is less likely to change.

[0095] The indirect support member 87 indirectly supports the heat transfer member 5 and the tubular flow channel member 6 via the inner container 2 and the direct support member 7. Therefore, the relative positional relationship between the heat storage body 4, the heat transfer member 5, and the tubular flow channel member 6 is unlikely to change. Furthermore, the indirect support member 87 and the direct support member 7 are aligned radially via the side circumferential wall portion 20. Therefore, the positioning accuracy of the heat transfer member 5 and the tubular flow channel member 6 is high.

[0096] <Fourth Embodiment> The main difference between the chemical heat storage device of this embodiment and the chemical heat storage device of the first embodiment is that a hollow plate-shaped flow channel member is used instead of a tubular flow channel member. The differences will be explained in detail here.

[0097] Figure 17 shows a cross-sectional view perpendicular to the axis of the chemical heat storage device of this embodiment. Figure 18 shows an enlarged view of the area within frame XVIII in Figure 17. In these figures, parts corresponding to those in Figures 8 and 9 are indicated by the same reference numerals.

[0098] The side periphery wall portion 20 of the inner container 2 is provided with a plurality of slits 202. The slits 202 penetrate the side periphery wall portion 20 in the left-right direction. The plurality of slits 202 are arranged in the left and right portions of the side periphery wall portion 20. In each of the left and right portions, the plurality of slits 202 are arranged in two rows (the extension direction is in the front-rear direction, and the juxtaposition direction is in the up-down direction). The plurality of slits 202 are arranged corresponding to the chambers 220 (the space between a pair of direct support members 7 adjacent in the front-rear direction, as shown in Figures 6 and 7 above). In any single chamber 220, a pair of left-right slits 202 are arranged in two layers, upper and lower.

[0099] The hollow plate-shaped flow channel member 6a is made of metal and has a flat plate shape that extends in the front-rear, left-right, and right directions (horizontal direction). The hollow plate-shaped flow channel member 6a is arranged in the housing section 22. The hollow plate-shaped flow channel member 6a is attached to a pair of left and right slits 202. Two hollow plate-shaped flow channel members 6a are arranged in two stages, upper and lower, in any single room 220. The two stages of hollow plate-shaped flow channel members 6a divide the room 220 into three small rooms 220a, upper and lower.

[0100] The hollow plate-shaped flow channel member 6a partitions an inner flow channel (reaction medium flow channel) 60 inside. The inner flow channel 60 comprises two outer openings 600 and a plurality of inner openings 601. The two outer openings 600 are located at both the left and right ends of the hollow plate-shaped flow channel member 6a. That is, the two outer openings 600 open to the outside of the inner container 2 (outer flow channel 32) through a pair of left and right slits 202 of the inner container 2. The plurality of inner openings 601 are located in the wall portion of the hollow plate-shaped flow channel member 6a (the portion located in the housing portion 22). The inner openings 601 open toward the heat storage body 4. The size (diameter) of the inner openings 601 is set to allow water vapor to pass through, but to be large enough that the heat storage material particles of the heat storage body 4 cannot easily pass through.

[0101] Multiple inner openings 601 are distributed throughout the entire wall of the hollow plate-shaped flow channel member 6a. Furthermore, multiple inner openings 601 are distributed along the entire length of the chamber 220 in the front-to-back direction. Water vapor can pass through the inner flow channels 60. Water vapor is supplied to the heat storage body 4 through the inner openings 601. Conversely, water vapor is discharged from the heat storage body 4 through the inner openings 601.

[0102] The chemical heat storage device 1 of this embodiment and the chemical heat storage device of the first embodiment have similar effects and advantages in respect of the parts that are common to each other. The chemical heat storage device 1 of this embodiment is equipped with a hollow plate-shaped flow channel member 6a. Therefore, water vapor can be supplied into the heat storage body 4 via the inner flow channel (reaction medium flow channel) 60. In addition, water vapor can be recovered from inside the heat storage body 4.

[0103] The inner flow path 60 opens at multiple locations relative to the heat storage body 4. This makes it easy to diffuse water vapor throughout the heat storage body 4. It also makes it easy to recover water vapor from the entire heat storage body 4. Furthermore, the multiple inner openings 601 are distributed at predetermined intervals across the entire wall portion (the portion located in the housing portion 22) of the hollow plate-shaped flow path member 6a. Furthermore, the multiple inner openings 601 are distributed at predetermined intervals along the entire length of the heat storage body 4 in the front-rear direction. This makes it easy to diffuse water vapor throughout the heat storage body 4. It also makes it easy to recover water vapor from the entire heat storage body 4.

[0104] The heat storage body 4 is prone to being pulverized due to volume changes (expansion and contraction) associated with heat storage and release. The fine particles of the heat storage body 4 tend to flow down the containment section 22 due to their own weight. As a result, the density of the heat storage body 4 in the containment section 22 tends to be sparser in the upper part and denser in the lower part.

[0105] In this regard, the hollow plate-shaped flow channel member 6a divides any single chamber 220 into multiple smaller chambers 220a. Therefore, the heat storage body 4 is less likely to flow down from the upper chamber 220a to the lower chamber 220a. Consequently, uneven distribution of the heat storage body 4 in the storage section 22 can be suppressed.

[0106] <Fifth Embodiment> The main difference between the chemical heat storage device of this embodiment and the chemical heat storage device of the first embodiment is that a double-tubular flow channel member is used instead of a tubular flow channel member. The differences will be explained in detail here.

[0107] Figure 19 shows a cross-sectional view perpendicular to the axis of the chemical heat storage device of this embodiment. Parts corresponding to those in Figure 8 are indicated by the same reference numerals. A double-tubular flow channel member 6b is arranged in the housing section 22. The double-tubular flow channel member 6b is made of metal and comprises a main member 61 and a plurality of branch members 62.

[0108] The main body 61 has a double-circular tubular shape extending in the front-rear direction. The main body 61 comprises an outer circumferential wall portion 63 and an inner circumferential wall portion 64. The inner circumferential wall portion 64 is located radially inward of the outer circumferential wall portion 63. The outer circumferential wall portion 63 and the inner circumferential wall portion 64 are arranged coaxially (on the central axis A1). Both the front and rear ends of the main body 61 are sealed.

[0109] An inner flow path 60 is partitioned inside the main member 61 (between the outer peripheral wall 63 and the inner peripheral wall 64). In a cross-section perpendicular to the axis, the inner flow path 60 has an annular shape centered on the central axis A1. The housing section 22 comprises an outer housing section 22a and an inner housing section 22b, flanking the main member 61. The outer housing section 22a and the inner housing section 22b are each filled with a heat storage body 4. The outer housing section 22a is partitioned between the side peripheral wall 20 and the outer peripheral wall 63. The outer surface of the outer peripheral wall 63 is in contact with the heat storage body 4 of the outer housing section 22a. The inner housing section 22b is partitioned radially inward of the inner peripheral wall 64. The inner surface of the inner peripheral wall 64 is in contact with the heat storage body 4 of the inner housing section 22b.

[0110] Multiple inner openings 601 are distributed throughout the entire wall portion (outer peripheral wall portion 63, inner peripheral wall portion 64) of the main member 61. Multiple inner openings 601 are distributed along the entire length of the heat storage body 4 in the front-rear direction. The inner openings 601 of the outer peripheral wall portion 63 open toward the heat storage body 4 in the outer housing portion 22a. The inner openings 601 of the inner peripheral wall portion 64 open toward the heat storage body 4 in the inner housing portion 22b.

[0111] The branch members 62 have a straight tubular shape that extends radially (in a cross-section perpendicular to the axis, in the radial direction of a circle centered on the central axis A1). The branch members 62 connect the main body 61 and the side circumferential wall portion 20 of the inner container 2. The outer opening 600 is located at the radial outer end of the branch member 62. The outer opening 600 opens into the outer flow path 32 (the portion between the side circumferential wall portion 20 and the side circumferential wall portion 30). Multiple branch members 62 are spaced apart at predetermined intervals and arranged side by side in the front-rear direction.

[0112] Each heat transfer member 5 extends radially across both sides of the main body 61. Specifically, of the pair of straight pipe sections 50a and 50b, the radially outer straight pipe section 50a extends radially outward along the outer peripheral wall section 63 in the front-rear direction. The radially inner straight pipe section 50b extends radially inward along the inner peripheral wall section 64 in the front-rear direction. The curved pipe section 51 extends radially across the rear end of the main body 61. The curved pipe section 51 connects the rear ends of the pair of straight pipe sections 50a and 50b.

[0113] Multiple direct support members 7 are interposed between the side circumferential wall portion 20 and the outer circumferential wall portion 63 at predetermined intervals in the front-rear direction. The direct support members 7 divide the outer housing portion 22a into multiple outer rooms 221a arranged in the front-rear direction, as shown in Figure 6 above. The outer circumferential wall portion 63 and the radially outer straight pipe portion 50a are inserted through multiple support holes 70 of the direct support members 7. The direct support members 7 directly support the outer circumferential wall portion 63 and the radially outer straight pipe portion 50a. Furthermore, the direct support members 7 directly position the outer circumferential wall portion 63 and the radially outer straight pipe portion 50a.

[0114] Multiple direct support members 7a are arranged radially inward of the inner circumferential wall portion 64, spaced apart at predetermined intervals in the front-rear direction. The direct support members 7a divide the inner housing portion 22b into multiple inner chambers 221b arranged in the front-rear direction, similar to the multiple chambers 220 shown in Figure 6. The radially inward straight pipe portion 50b is inserted through multiple support holes 70a of the direct support members 7a. The direct support members 7a directly support the radially inward straight pipe portion 50b. Furthermore, the direct support members 7a directly position the radially inward straight pipe portion 50b.

[0115] The chemical heat storage device 1 of this embodiment and the chemical heat storage device of the first embodiment have similar effects with respect to the parts that are common to their configuration. The chemical heat storage device 1 of this embodiment is equipped with a double-tubular flow channel member 6b. Therefore, steam can be supplied into the heat storage body 4 via an annular inner flow channel (reaction medium flow channel) 60. Furthermore, steam can be recovered from inside the heat storage body 4.

[0116] The inner flow path 60 opens at multiple locations relative to the heat storage body 4. This makes it easy to diffuse water vapor throughout the heat storage body 4. It also makes it easy to recover water vapor from the entire heat storage body 4. Furthermore, the multiple inner openings 601 are distributed at predetermined intervals across the entire outer periphery wall portion 63 and inner periphery wall portion 64 (the portion located in the housing portion 22) of the main body 61. Furthermore, the multiple inner openings 601 are distributed at predetermined intervals along the entire length of the heat storage body 4 in the front-to-back direction. This makes it easy to diffuse water vapor throughout the heat storage body 4. It also makes it easy to recover water vapor from the entire heat storage body 4.

[0117] <Sixth Embodiment> The main difference between the chemical heat storage device of this embodiment and the chemical heat storage device of the third embodiment is that the outer opening of the inner flow channel of the tubular flow channel member opens to the outer surface of the side periphery wall of the inner container, rather than the outer surface of the end wall of the inner container. The differences will be explained in detail here.

[0118] Figure 20 shows a cross-sectional view perpendicular to the axis of the chemical heat storage device of this embodiment. Parts corresponding to those in Figure 16 are indicated by the same reference numerals. The tubular flow channel member 6 is located inside the heat storage body 4. The outer surface of the tubular flow channel member 6 is in contact with the heat storage body 4.

[0119] The tubular flow channel member 6 comprises a main member 61 and a plurality of branch members 62. The main member 61 has a straight tubular shape extending in the front-rear direction. Both the front and rear ends of the main member 61 are sealed. The plurality of inner openings 601 are distributed throughout the entire wall of the tubular flow channel member 6. Furthermore, the plurality of inner openings 601 are distributed throughout the entire length of the heat storage body 4 in the front-rear direction.

[0120] The branch members 62 have a straight tubular shape that extends radially (in a cross-section perpendicular to the axis, in the radial direction of a circle centered on the central axis A1). The branch members 62 connect the main body 61 and the side circumferential wall portion 20 of the inner container 2. The outer opening 600 is located at the radial outer end of the branch member 62. The outer opening 600 opens into the outer flow path 32 (the portion between the side circumferential wall portion 20 and the side circumferential wall portion 30). Multiple branch members 62 are spaced apart at predetermined intervals and arranged side by side in the front-rear direction.

[0121] The chemical heat storage device 1 of this embodiment and the chemical heat storage device of the third embodiment have similar effects and advantages with respect to the parts that share a common configuration. As with the chemical heat storage device 1 of this embodiment, steam may be supplied to the main body 61 embedded inside the heat storage body 4 via the branch members 62.

[0122] <Seventh Embodiment> The main difference between the chemical thermal storage device of this embodiment and the chemical thermal storage device of the sixth embodiment is the presence of an external manifold. This section will primarily explain the differences.

[0123] Figure 21 shows a cross-sectional view perpendicular to the axis of the chemical heat storage device of this embodiment. Parts corresponding to those in Figure 20 are indicated by the same reference numerals. An outer manifold 3a is mounted radially outside the inner container 2. The central axis A2 of the cross-sectional view perpendicular to the axis of the outer manifold 3a coincides with the central axis A1 of the cross-sectional view perpendicular to the axis of the inner container 2. The outer manifold 3a covers the inner container 2 from the radial outside. The outer manifold 3a is made of metal and has a double-cylindrical shape.

[0124] The outer manifold 3a comprises an outer peripheral wall portion 33 and an inner peripheral wall portion 34. The inner peripheral wall portion 34 is cylindrical in shape. The inner peripheral wall portion 34 is located radially outward from the side peripheral wall portion 20 of the inner container 2. Multiple mounting holes 300 are provided in the inner peripheral wall portion 34. The mounting holes 300 and the mounting holes 200 of the side peripheral wall portion 20 are aligned radially. The outer peripheral wall portion 33 is located radially outward from the inner peripheral wall portion 34. An outer flow path 32 is partitioned between the outer peripheral wall portion 33 and the inner peripheral wall portion 34. In a cross-section perpendicular to the axis, the outer flow path 32 has an annular shape centered on the central axis A2. The branch member 62 penetrates the mounting holes 200 and is inserted into the mounting holes 300. The outer opening 600 of the branch member 62 communicates with the outer flow path 32.

[0125] The chemical heat storage device 1 of this embodiment and the chemical heat storage device of the sixth embodiment have similar effects with respect to the parts that share a common configuration. As with the chemical heat storage device 1 of this embodiment, the outer manifold 3a may be arranged radially outside the inner container 2. Furthermore, an outer flow path 32 may be set in the outer manifold 3a. According to the chemical heat storage device 1 of this embodiment, the outer manifold 3a (i.e., the outer flow path 32) can be arranged independently of the inner container 2. A space is interposed between the inner container 2 and the outer manifold 3a. Therefore, the transfer of heat between the heat storage body 4 and the outer flow path 32 via the wall of the inner container can be suppressed. In addition, an annular outer flow path 32 can be arranged so as to surround the inner container 2.

[0126] <Eighth Embodiment> The main difference between the chemical thermal storage device of this embodiment and the chemical thermal storage device of the seventh embodiment is the presence of a header. This section will primarily explain the differences.

[0127] Figure 22 shows a cross-sectional view perpendicular to the axis of the chemical heat storage device of this embodiment. Parts corresponding to those in Figure 21 are indicated by the same reference numerals. The header 3b is positioned spaced apart from the inner container 2. The header 3b is included in the concept of the "outer supply pipe" of this disclosure. The header 3b is made of metal and has a straight cylindrical shape extending in the front-rear direction.

[0128] Multiple mounting holes 300 are provided in the side peripheral wall portion 35 of the header 3b. The branch member 62 passes through the mounting hole 200 and is inserted into the mounting hole 300. The outer opening 600 of the branch member 62 communicates with the outer flow path 32.

[0129] The chemical heat storage device 1 of this embodiment and the chemical heat storage device of the seventh embodiment have similar effects and advantages in respect of the parts that are common to their configuration. As in the chemical heat storage device 1 of this embodiment, the header 3b (i.e., the outer flow path 32) may be arranged independently of the inner container 2. The outer flow path 32 may also be set in the header 3b. According to the chemical heat storage device 1 of this embodiment, the header 3b (i.e., the outer flow path 32) can be arranged independently of the inner container 2. There is a space between the inner container 2 and the header 3b. Therefore, it is possible to suppress the transfer of heat between the heat storage body 4 and the outer flow path 32 via the wall of the inner container.

[0130] <Ninth Embodiment> The main difference between the chemical heat storage device of this embodiment and the chemical heat storage device of the first embodiment is that the heat transfer member passes through the heat storage body twice in the front-to-back direction. The main differences will be explained here.

[0131] Figure 23 shows a cross-sectional view of the chemical heat storage device of this embodiment in the front-to-back direction (axial direction). Note that parts corresponding to those in Figure 6 are indicated by the same reference numerals. The straight pipe section 50 of the heat transfer member 5 protrudes from the end wall 21 of the inner container 2 toward the rear (outer flow path 32). Therefore, each of the pair of straight pipe sections 50 of the heat transfer member 5 penetrates the heat storage body 4 in the front-to-back direction. In other words, the heat transfer member 5 passes through the heat storage body 4 a total of two times.

[0132] The chemical heat storage device 1 of this embodiment and the chemical heat storage device of the first embodiment have similar effects with respect to the parts that are common to their configuration. As in the chemical heat storage device 1 of this embodiment, any single heat transfer member 5 may pass through the heat storage body 4 a total of two times. That is, the number of passes of the heat transfer member 5 to the heat storage body 4 may be set to multiple times.

[0133] <Tenth Embodiment> The main difference between the chemical heat storage device of this embodiment and the chemical heat storage device of the first embodiment is that the heat transfer member is straight rather than U-shaped. Also, instead of reaction medium supply and discharge pipes, reaction medium supply pipes and reaction medium discharge pipes are provided. Furthermore, instead of heat medium supply and discharge cylinders, heat medium supply cylinders and heat medium discharge cylinders are provided. Here, we will mainly explain the differences.

[0134] Figure 24 shows a cross-sectional view of the chemical heat storage device of this embodiment in the front-to-back direction (axial direction). Parts corresponding to those in Figure 6 are indicated by the same reference numerals. The outer container 3 is made of metal and has a cylindrical shape extending in the front-to-back direction. The outer container 3 is open in the front-to-back direction. The openings at both the front and rear ends of the outer container 3 are sealed by heat transfer member mounting plates 81a and 81b, respectively.

[0135] A first mounting hole 300 is provided in the lower part of the front end of the side circumferential wall portion 30. A short-axis circular reaction medium supply pipe 80a is attached to the mounting hole 300. Water vapor is supplied from outside the outer container 3 to the outer flow path 32 via the reaction medium supply pipe 80a.

[0136] A second mounting hole 300 is provided in the upper part of the rear end of the side circumferential wall portion 30. A short-axis circular reaction medium discharge pipe 80b is attached to the mounting hole 300. Water vapor is discharged from the outer flow path 32 to the outside of the outer container 3 via the reaction medium discharge pipe 80b.

[0137] The heat transfer medium discharge pipe 82a is made of metal and has a short-axis cylindrical shape extending in the front-rear direction. The heat transfer medium discharge pipe 82a is positioned in front of the front heat transfer member mounting plate 81a. The heat transfer member mounting plate 81a seals the rear end opening of the heat transfer medium discharge pipe 82a. The end plate 86a seals the front end opening of the heat transfer medium discharge pipe 82a.

[0138] A discharge chamber 831 is partitioned inside the heat transfer medium discharge pipe 82a. A mounting hole 820a is provided in the upper part of the heat transfer medium discharge pipe 82a. A heat transfer medium discharge pipe 85 is attached to the mounting hole 820a. The heat transfer medium is discharged from the discharge chamber 831 to the outside of the heat transfer medium discharge pipe 82a via the heat transfer medium discharge pipe 85.

[0139] The heat transfer medium supply tube 82b is made of metal and has a short-axis cylindrical shape extending in the front-rear direction. The heat transfer medium supply tube 82b is located behind the rear heat transfer member mounting plate 81b. The heat transfer member mounting plate 81b seals the front end opening of the heat transfer medium supply tube 82b. The end plate 86b seals the rear end opening of the heat transfer medium supply tube 82b.

[0140] A supply chamber 830 is partitioned inside the heat transfer medium supply cylinder 82b. A mounting hole 820b is provided in the lower part of the heat transfer medium supply cylinder 82b. A heat transfer medium supply pipe 84 is installed in the mounting hole 820b. The heat transfer medium is supplied to the supply chamber 830 from outside the heat transfer medium supply cylinder 82b via the heat transfer medium supply pipe 84.

[0141] The heat transfer member 5 is tubular in shape. The front end (downstream end) of the heat transfer member 5 is attached to the front heat transfer member mounting plate 81a. The rear end (upstream end) of the heat transfer member 5 is attached to the rear heat transfer member mounting plate 81b. The heat transfer member 5 connects the rear supply chamber 830 and the front discharge chamber 831 via the heat storage body 4. The heat transfer member 5 passes through the heat storage body 4 only once in the front-to-back direction.

[0142] The chemical heat storage device 1 of this embodiment and the chemical heat storage device of the first embodiment have similar effects with respect to the parts that share a common configuration. As in the chemical heat storage device 1 of this embodiment, any single heat transfer member 5 may pass through the heat storage body 4 only once. That is, the number of passes of the heat transfer member 5 to the heat storage body 4 may be set to one.

[0143] As in the chemical heat storage device 1 of this embodiment, a reaction medium route R1 for water vapor may be set up, passing through the reaction medium supply pipe 80a, the outer flow path 32, the inner flow path 60 shown in Figure 8, the outer flow path 32, and the reaction medium discharge pipe 80b.

[0144] During heat dissipation (hydration reaction), water vapor is supplied to the heat storage body 4 from the outside via the reaction medium supply pipe 80a, the outer channel 32, and the inner channel 60 shown in Figure 8. During heat storage (dehydration reaction), water vapor is discharged from the heat storage body 4 to the outside via the inner channel 60, the outer channel 32, and the reaction medium discharge pipe 80b shown in Figure 8. Thus, a one-way reaction medium route R1 may be set up.

[0145] As in the chemical heat storage device 1 of this embodiment, the heat transfer medium supply system (heat transfer medium supply cylinder 82b, supply chamber 830, heat transfer medium supply pipe 84) and the discharge system (heat transfer medium discharge cylinder 82a, discharge chamber 831, heat transfer medium discharge pipe 85) may be arranged separately.

[0146] <Other> The embodiments of the chemical heat storage device of this disclosure have been described above. However, the embodiments are not particularly limited to the above forms. It is also possible to implement the device in various modified and improved forms that can be carried out by those skilled in the art.

[0147] [structure] Among the chemical heat storage devices 1 of the embodiments described above, any component of the chemical heat storage device 1 of any embodiment can be incorporated into the chemical heat storage device 1 of any other embodiment. At least one of the tubular flow channel member 6 shown in Figure 8, the opening 201 shown in Figure 14, the tubular flow channel member 6 shown in Figure 16, the hollow plate-shaped flow channel member 6a shown in Figure 17, and the double tubular flow channel member 6b shown in Figure 19 may be placed in the chemical heat storage device 1 shown in Figure 8 or the chemical heat storage device 1 shown in Figure 14. For example, the opening 201 shown in Figure 14 may be placed over the entire wall of the inner container 2 of the chemical heat storage device 1 shown in Figure 8, similar to Figure 11.

[0148] (Inner container 2, outer container 3) The shape of the inner container 2 is not particularly limited. It may be a straight cylinder (I-shaped), a curved cylinder (C-shaped, S-shaped, etc.), or a shape that combines a straight cylinder and a curved cylinder as appropriate (J-shaped, U-shaped, etc.). It may also be a circular (perfect circle, ellipse, etc.) cylinder or a polygonal (triangle, square, pentagon, hexagon, etc.) cylinder. If the inner container 2 is a straight cylinder, the axial direction of the inner container 2 is not particularly limited. It may be horizontal, vertical, or inclined with respect to both the horizontal and vertical directions. The above-mentioned matters concerning the inner container 2 also apply to the outer container 3.

[0149] The shapes of the outer container 3 and the inner container 2 may be the same or different. For example, the outer container 3 may be polygonal and cylindrical, and the inner container 2 may be cylindrical. Or vice versa. Furthermore, the outer container 3 and the inner container 2 may or may not be arranged coaxially. That is, the central axis A2 of the outer container 3 and the central axis A1 of the inner container may coincide or be different. If their respective central axes A1 and A2 are different, the two central axes A1 and A2 may be arranged parallel to each other or intersecting each other. There is no particular limit to the number of inner containers 2 arranged in relation to the outer container 3. One or more inner containers 2 may be arranged in relation to a single outer container 3.

[0150] (Heat transfer member 5, flow path member) The shape of the heat transfer member 5 is not particularly limited. If the heat transfer member 5 is tubular, it may be straight (I-shaped), curved (C-shaped, S-shaped, etc.), or a shape that combines straight and curved sections as appropriate (J-shaped, U-shaped, etc.). It may also be circular or polygonal. The heat transfer member 5 may be a hollow plate with a heat transfer medium channel 52 inside and its outer surface in contact with the heat storage body 4. Alternatively, the heat transfer member 5 may be a double-tube shape with an annular heat transfer medium channel 52 inside and its outer and inner surfaces in contact with the heat storage body 4 (the shape of the outer wall and the shape of the inner wall may be the same or different). If the heat transfer member 5 is straight or flat, the axial direction of the heat transfer member 5 is not particularly limited. It may be horizontal, vertical, or inclined with respect to the horizontal and vertical directions. Furthermore, the number of heat transfer members 5 arranged inside the heat storage body 4 is not particularly limited. There may be one or more heat transfer members. Furthermore, the number of passes of the heat transfer member 5 within the heat storage body 4 is not particularly limited. The above-mentioned points regarding the heat transfer member 5 also apply to the flow path members (tubular flow path member 6, hollow plate-shaped flow path member 6a, double-tubular flow path member 6b). Additionally, a heat transfer area expansion member (such as a fin) may be placed on at least one of the outer surface (the surface in contact with the heat storage body 4) and the inner surface (the surface in contact with the heat transfer medium) of the heat transfer member 5.

[0151] Furthermore, a filter that allows water vapor to pass through but makes it difficult for the heat storage material particles of the heat storage body 4 to pass through may be placed in at least a part of the reaction medium flow path of the flow channel member. Figures 25(A) to 25(G) show partial cross-sectional views perpendicular to the axis of other embodiments (1 to 7) of the chemical heat storage device. Note that the parts shown in Figures 25(A) to 25(G) correspond to frame XXV in Figure 9. As shown in Figure 25(A), a filter (porous material) 90a may be embedded in the inner opening 601. As shown in Figure 25(B), in addition to the filter 90a in Figure 25(A), one opening of the inner opening 601 in the axial direction (outside the tubular flow channel member 6) may be covered with a filter (porous sheet) 90b. As shown in Figure 25(C), in addition to the filter 90a in Figure 25(A), the other opening of the inner opening 601 in the axial direction (inside the tubular flow channel member 6) may be covered with a filter 90b. As shown in Figure 25(D), in addition to the filter 90a in Figure 25(A), the outer openings on both sides of the inner opening 601 in the axial direction may be covered with filters 90b. As shown in Figure 25(E), one opening of the inner opening 601 in the axial direction may be covered with filter 90b. As shown in Figure 25(F), the other opening of the inner opening 601 in the axial direction may be covered with filter 90b. As shown in Figure 25(G), the outer openings on both sides of the inner opening 601 in the axial direction may be covered with filters 90b. According to Figures 25(A) to 25(G), compared to the case where filters 90a and 90b are not placed in the reaction medium flow path 60, it is possible to more reliably achieve both the passage of water vapor and the suppression of leakage of the heat storage body 4.

[0152] Furthermore, as shown in Figures 25(A) to 25(D), it is possible to suppress the heat storage body 4 from entering the inner opening 601. Also, compared to the case where the wall portion of the tubular flow channel member 6 itself is a filter (porous material) 90a, since a filter 90a is arranged for each inner opening 601, a crack that enters any filter 90a is less likely to propagate to other filters 90a.

[0153] Furthermore, as shown in Figures 25(B), 25(D), 25(E), and 25(G), the opening on one side of the inner opening 601 in the axial direction (outside the tubular flow channel member 6) is covered with a filter (porous sheet) 90b, thereby preventing the heat storage body 4 from entering the inner opening 601.

[0154] Furthermore, as shown in Figures 25(C), 25(D), 25(F), and 25(G), the other opening of the inner opening 601 in the axial direction (inside the tubular flow channel member 6) is covered with a filter (porous sheet) 90b, thereby preventing the heat storage body 4 from entering the tubular flow channel member 6.

[0155] Furthermore, filters 90a and 90b shown in Figures 25(A) to 25(G) may be placed in the inner opening 601 of the tubular flow channel member 6 shown in Figures 20 to 22, the opening 201 of the inner container 2 shown in Figure 15, the inner opening 601 of the hollow plate-shaped flow channel member 6a shown in Figure 18, and the inner opening 601 of the double tubular flow channel member 6b shown in Figure 19. In summary, the filters only need to be placed inside the opening or outside the opening (at least one of the two outer sides in the direction of the opening axis).

[0156] (Support member) The shape of the direct support member 7 is not particularly limited. It may be plate-shaped, rod-shaped, etc. The number of direct support members 7 arranged in the housing section 22 is not particularly limited. There may be one or more. The direct support member 7 may be a separate component from the inner container 2. Alternatively, the direct support member 7 may be integrated with the inner container 2. The number of heat transfer members 5 and the number of direct support members 7 may be the same or different. A single heat transfer member 5 may be supported by multiple direct support members 7. Multiple heat transfer members 5 may be supported by a single direct support member 7. Multiple heat transfer members 5 may be supported by multiple direct support members 7. The position of the direct support member 7 in the housing section 22 is not particularly limited. The position of the direct support member 7 should be determined considering the axial length and strength of the heat transfer member 5, the volume of the multiple chambers 220, etc. The chemical heat storage device 1 does not need to have direct support members 7. The above-mentioned matters concerning the direct support member 7 also apply to the direct support member 7a.

[0157] The shape of the indirect support member 87 is not particularly limited. It may be plate-shaped, rod-shaped, etc. The number of indirect support members 87 arranged in the outer flow path 32 is not particularly limited. There may be one or more. The indirect support member 87 may be a separate component from the inner container 2 and the outer container 3. The indirect support member 87 may be integrated with the inner container 2 or the outer container 3. The number of inner containers 2 and the number of indirect support members 87 may be the same or different. A single inner container 2 may be supported by multiple indirect support members 87. Multiple inner containers 2 may be supported by a single indirect support member 87. Multiple inner containers 2 may be supported by multiple indirect support members 87. The position of the indirect support member 87 in the outer flow path 32 is not particularly limited. The position of the indirect support member 87 should be determined considering the axial length, strength, etc., of the inner container 2. The chemical heat storage device 1 does not need to have indirect support members 87. The shape, number, position, etc., of the opening 870 are not particularly limited. The entire outer channel 32 should be in communication through the opening 870.

[0158] [material] The materials of each component constituting the chemical heat storage device 1 (inner container 2, outer container 3, heat transfer member 5, tubular flow channel member 6, direct support members 7, 7a, indirect support member 87, reaction medium supply and discharge pipe 80, reaction medium supply pipe 80a, reaction medium discharge pipe 80b, heat transfer member mounting plates 81, 81a, 81b, heat medium supply and discharge cylinder 82, heat medium discharge cylinder 82a, heat medium supply cylinder 82b, partition wall 83, heat medium supply pipe 84, heat medium discharge pipe 85, end plates 86, 86a, 86b) are not particularly limited. Considering strength, specific heat, operating temperature, etc., metals (e.g., stainless steel, aluminum, aluminum alloy, copper, iron, etc.), ceramics, resins, etc. may be used.

[0159] The material of the filter (porous body) 90a and filter (porous sheet) 90b shown in Figures 25(A) to 25(G) is not particularly limited. Examples include ceramics, sintered metals, resins, wire mesh (woven wire mesh, crimped wire mesh, welded wire mesh, sintered wire mesh, etc.), and mesh.

[0160] To ensure the fluidity of the reaction medium, the inner container 2, the flow channel members (tubular flow channel member 6, hollow plate-shaped flow channel member 6a, double-tubular flow channel member 6b), and the indirect support member 87 may be made of porous mesh material (such as perforated metal, mesh filter, or resin nonwoven fabric).

[0161] The type of chemical heat storage material used in the heat storage material particles of the heat storage body 4 is not particularly limited. For example, it may be a compound (oxide, hydroxide, carbon oxide, chloride, sulfur oxide, etc.) of an alkaline earth metal (Mg, Ca, Sr, Ba, etc.). The compound only needs to contain one or more alkaline earth metals. Specifically, it may be calcium hydroxide (Ca(OH)2), magnesium hydroxide (Mg(OH)2), barium hydroxide (Ba(OH)2), a magnesium-calcium composite hydroxide, calcium oxide (CaO), magnesium oxide (MgO), a magnesium-calcium composite oxide, etc.

[0162] The average primary particle diameter of the heat storage material particles is not particularly limited. For example, it may be between 0.1 μm and 10 μm. The average primary particle diameter is the median diameter of the particle size distribution (particle size distribution) of the heat storage material particles, for example, determined by laser diffraction.

[0163] The type of clay mineral contained in the heat storage body 4 is not particularly limited. For example, sepiolite, attapulgite, kaolinite, bentonite, etc., may be used. These clay minerals can be used individually or in mixtures of two or more types. The fiber diameter of the clay minerals is not particularly limited.

[0164] The form of the heat storage body 4 is not particularly limited. It may be in powder form or in lump form. In the case of lump form, it may be a molded body (a press-molded body of heat storage material particles or heat storage material granules that has been fired). The type of reaction medium is not particularly limited. Depending on the type of chemical heat storage material, for example, steam (water), ammonia, etc. can be used. The type of heat transfer medium is not particularly limited. For example, steam (water), oil (silicone oil, etc.), air, molten salt, etc. can be used. The reaction medium and heat transfer medium may be gases or liquids. They just need to have fluidity. [Explanation of symbols]

[0165] 1: Chemical heat storage device, 2: Inner container, 20: Side peripheral wall (wall), 200: Mounting hole, 201: Opening (reaction medium flow path), 202: Slit, 21: End wall, 22: Housing section, 220: Room, 220a: Small room, 221a: Outer room, 221b: Inner room, 22a: Outer housing section, 22b: Inner housing section, 23: Straight cylinder section, 24: Curved cylinder section, 3: Outer container, 3a: Outer manifold, 3b: Header (outer supply pipe), 30 : Side circumferential wall section, 300: Mounting hole, 31: End wall section, 310: Mounting hole, 32: Outer flow path, 33: Outer circumferential wall section, 34: Inner circumferential wall section, 35: Side circumferential wall section, 4: Heat storage body, 5: Heat transfer member, 50: Straight pipe section, 50a: Straight pipe section, 50b: Straight pipe section, 51: Curved pipe section, 52: Heat transfer medium flow path, 6: Tubular flow path member, 6a: Hollow plate-shaped flow path member, 6b: Double tubular flow path member, 60: Inner flow path (reaction medium flow path), 600: Outer opening, 601: Inner opening, 61: Main body member, 62: Branch member, 63: Outer perimeter wall, 64: Inner perimeter wall, 7: Direct support member (support member), 7a: Direct support member (support member), 70: Support hole, 70a: Support hole, 80: Reaction medium supply and discharge pipe, 80a: Reaction medium supply pipe, 80b: Reaction medium discharge pipe, 81: Heat transfer member mounting plate, 81a: Heat transfer member mounting plate, 81b: Heat transfer member mounting plate, 810: Mounting hole, 82: Heat transfer medium supply and discharge cylinder, 82a: Heat transfer medium discharge cylinder, 82b: Heat transfer medium Supply cylinder, 820: mounting hole, 820a: mounting hole, 820b: mounting hole, 83: partition wall, 830: supply chamber, 831: discharge chamber, 84: heat transfer medium supply pipe, 85: heat transfer medium discharge pipe, 86: end plate, 86a: end plate, 86b: end plate, 87: indirect support member (support member), 870: opening, 871: support hole, 88: leg, 90a: filter, 90b: filter, A1: central axis, A2: central axis, R1: reaction medium route, R2: heat transfer medium route.

Claims

1. A reactor that partitions the containment area internally, A heat storage body arranged in the aforementioned housing section, A heat transfer member is disposed inside the heat storage body and divides a heat transfer medium channel through which a heat transfer medium that exchanges heat with the heat storage body passes; A flow channel member is disposed inside the heat storage body and divides the reaction medium flow channel inside, through which the reaction medium passes and which opens toward the heat storage body. A chemical heat storage device equipped with the following features.

2. A reactor that partitions the containment area internally, A heat storage body arranged in the aforementioned housing section, A heat transfer member is disposed inside the heat storage body and divides a heat transfer medium channel through which a heat transfer medium that exchanges heat with the heat storage body passes; A support member that directly or indirectly supports the heat transfer member, Equipped with, A chemical heat storage device is provided in which a reaction medium channel is opened in the wall of the reactor, connecting the outside of the reactor to the housing, and through which the reaction medium passes.

3. The chemical heat storage apparatus according to claim 1, wherein the flow channel member is selected from (A) to (C) below. (A) A tubular channel member that has the reaction medium channel channel partitioned inside, its outer surface in contact with the heat storage body, and the reaction medium channel channel opening to the outer surface. (B) A hollow plate-shaped channel member that partitions the reaction medium channel internally, has an outer surface in contact with the heat storage body, and has the reaction medium channel opening to the outer surface. (C) A double-tubular channel member having an annular reaction medium channel inside, with its outer and inner surfaces in contact with the heat storage body, and the reaction medium channel opening to the outer and inner surfaces.

4. The reactor is an inner vessel, The reaction medium channel is an inner channel that opens at multiple locations relative to the heat storage body. Furthermore, the inner container is provided with a reaction medium supply member that is located outside the inner container and demarcates an outer channel that communicates with the inner channel, The chemical heat storage apparatus according to claim 1 or claim 2, wherein the reaction medium supply member is selected from (D) to (F) below. (D) An outer container that covers the inner container from the outside and demarcates the outer flow path between its own inner surface and the outer surface of the inner container. (E) A double-tube outer manifold that covers the inner container from the outside and partitions the annular outer flow path inside. (F) An outer supply pipe that partitions the outer flow path inside.

5. The chemical heat storage device according to claim 1 or claim 2, wherein the number of passes of the heat transfer member to the heat storage body is one or more.

6. The chemical heat storage device according to claim 1 or claim 2, wherein the volume of the storage section is smaller than the volume of the heat storage body after expansion due to the chemical reaction.

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