Chemical heat storage body and chemical heat storage reactor

Abstract

To provide a chemical heat storage body which can be easily attached to a periphery of a passage pipe of a heat exchanger in a state that a chemical heat storage medium can contact with a reaction medium, and to provide a chemical heat storage reactor.SOLUTION: A chemical heat storage body 21 is used for a purpose for which the chemical heat storage body 21 is disposed at a periphery of a passage pipe 32 of a heat exchanger 31. The chemical heat storage body 21 includes a chemical heat storage member 22 which may be arranged in a spiral form along an outer periphery of the passage pipe 32. The chemical heat storage member 22 has: a tube 23 having a cylindrical wall 23a and a hollow part 23b in the cylindrical wall 23a; and a chemical heat storage medium HM disposed in the hollow part 23b of the tube 23. The cylindrical wall 23a is configured to transmit a reaction medium which reacts to the chemical heat storage medium HM.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to chemical heat storage bodies and chemical heat storage reactors. [Background technology]

[0002] As described in Patent Document 1 and Patent Document 2, a chemical heat storage reactor equipped with a chemical heat storage material using water as a reaction medium is known. The chemical heat storage reactor is equipped with a heat exchanger that exchanges heat with the chemical heat storage material. The chemical heat storage material is arranged around a flow pipe through which a heat medium flows in the heat exchanger. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-045485 A [Patent Document 2] JP 2014-126293 A Summary of the Invention [Problem to be solved by the invention]

[0004] There is a demand for the above-mentioned chemical heat storage material to be easily attached around the flow tube of the heat exchanger in a state in which it can come into contact with the reaction medium. [Means for solving the problem]

[0005] The chemical heat storage body that solves the above problem is a chemical heat storage body used for applications in which it is arranged around a flow path tube of a heat exchanger, and comprises a chemical heat storage member that can be arranged in a spiral shape along the outer periphery of the flow path tube, the chemical heat storage member having a tube having a cylindrical wall and a hollow portion within the cylindrical wall, and a chemical heat storage material that is arranged in the hollow portion of the tube, and the cylindrical wall is configured to be permeable to a reaction medium that reacts with the chemical heat storage material.

[0006] According to this configuration, the chemical heat storage material can be easily arranged around the flow tube by arranging the chemical heat storage material in a spiral shape along the outer periphery of the flow tube of the heat exchanger. Also, the reaction medium can be made to contact with the chemical heat storage material arranged in the hollow part of the tube by passing through the cylindrical wall of the tube of the chemical heat storage material. Effect of the Invention

[0007] The present disclosure provides an effect that a chemical heat storage material can be easily attached around a flow tube of a heat exchanger in a state in which the chemical heat storage material can be in contact with a reaction medium. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic cross-sectional view showing a chemical heat storage reactor in the first embodiment. [Diagram 2] FIG. 2 is a perspective view showing the chemical heat storage medium attached to the flow tube of the heat exchanger. [Diagram 3] FIG. 3 is a cross-sectional view showing the chemical heat storage medium attached to the flow tube of the heat exchanger. [Figure 4] FIG. 4 is a perspective view illustrating a method for attaching the chemical heat storage medium. [Diagram 5] FIG. 5 is a perspective view showing a main part of a heat exchanger according to the second embodiment. [Figure 6] FIG. 6 is a perspective view showing the chemical heat storage medium attached to the flow tube of the heat exchanger. [Figure 7] FIG. 7 is an end view showing the chemical heat storage medium attached to the flow tube of the heat exchanger. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] [First embodiment] Hereinafter, a first embodiment of the chemical heat storage body and the chemical heat storage reactor will be described with reference to the drawings. First, the overall configuration of the chemical heat storage reactor will be described.

[0010] <Overall configuration of chemical heat storage reactor> As shown in FIG. 1, the chemical heat storage reactor 11 includes a chemical heat storage body 21, a heat exchanger 31 that exchanges heat with the chemical heat storage body 21, and a pressure regulating vessel 41 that houses the chemical heat storage body 21 and the heat exchanger 31. The heat exchanger 31 includes a flow path pipe 32 through which a heat medium flows. The heat exchanger 31 may have a plurality of inlet pipes 33 arranged to extend parallel to each other. The heat exchanger 31 is connected to the inlet pipe 33 that flows the heat medium from the outside of the pressure regulating vessel 41 into the flow path pipe 32, and the outlet pipe 34 that flows the heat medium from the flow path pipe 32 to the outside of the pressure regulating vessel 41. The heat exchanger 31 is made of, for example, a metal material.

[0011] As shown in FIG. 2, the flow passage pipe 32 has a heat medium flow passage P1. During the heat storage operation of the chemical heat storage reactor 11, the heat medium flow passage P1 supplies heat from an external exhaust heat source (not shown) to the heat exchanger 31. During the heat dissipation operation of the chemical heat storage reactor 11, the heat medium flow passage P1 supplies heat to an external heating target (not shown). The flow passage pipe 32 in this embodiment is a circular pipe, but may be a flow passage pipe of another shape, such as a flat-shaped flow passage pipe (flat pipe). Furthermore, one flow passage pipe 32 may have a single flow passage or multiple flow passages. An example of a flow passage pipe having multiple flow passages is a flat porous pipe.

[0012] The pressure adjusting vessel 41 has a pressure adjusting vessel body 42 and a water vapor flow pipe 43 that can introduce water vapor from the outside of the pressure adjusting vessel body 42 and discharge water vapor inside the pressure adjusting vessel body 42 to the outside. The inside of the pressure adjusting vessel body 42 and the water vapor flow pipe 43 configure a reaction medium flow path P2 connected to the chemical heat storage body 21.

[0013] <Chemical heat storage material> 2 and 3, the chemical heat storage body 21 includes a chemical heat storage member 22 that can be arranged in a spiral shape along the outer periphery of the flow path pipe 32 of the heat exchanger 31. The chemical heat storage member 22 includes a tube 23 and a chemical heat storage material HM.

[0014] 2, the tube 23 has a cylindrical wall 23a and a hollow portion 23b inside the cylindrical wall 23a. The chemical heat storage material HM is disposed in the hollow portion 23b of the tube 23. The cylindrical wall 23a of the tube 23 is configured to be permeable to a reaction medium that reacts with the chemical heat storage material HM.

[0015] In this embodiment, the chemical heat storage material HM in which the reaction medium is water (water vapor) will be described as an example, but a chemical heat storage material that reacts with a reaction medium other than water can also be used. The chemical heat storage material HM in which water is the reaction medium stores heat through a dehydration reaction and releases heat through a hydration reaction.

[0016] The chemical heat storage material HM is preferably a powder material. The chemical heat storage material HM may be composed of only a chemical heat storage material that performs a dehydration reaction and a hydration reaction, or may be a material in which the chemical heat storage material is bound with a water vapor permeable binder such as a water vapor permeable resin. Examples of the chemical heat storage material include halides of alkaline earth metals. The chemical heat storage material HM may be used alone or in combination of multiple types.

[0017] The dehydration and hydration reactions of calcium chloride, which is a type of chemical heat storage material, are represented by, for example, the following formula (A). CaCl2·H2O+H2O⇔CaCl2·2H2O···(A) The cylindrical wall 23a of the tube 23 has water vapor permeability. From the viewpoint of making it easier to adjust the water vapor pressure condition of the chemical thermal storage medium HM, the water vapor permeability coefficient of the cylindrical wall 23a of the tube 23 is set to 1×10 -13 [mol m / (m 2 The water vapor permeability coefficient of the cylindrical wall 23a of the tube 23 is not particularly limited, but is preferably 1×10 -7 [mol m / (m 2 ·sec·Pa)] or less. The water vapor permeability coefficient of the cylindrical wall 23a can be measured, for example, by a moisture sensor method (JIS K7129:2008).

[0018] The material of the tube 23 is preferably a resin material. For example, the tube 23 may be a non-porous tube made of a resin material, a porous tube made of a resin material, etc. The tube 23 may be one type or a combination of multiple types.

[0019] Examples of resin materials for the tube 23 include polymethylpentene, ethylene-vinyl alcohol copolymer, polyamide, polystyrene, etc. The tube 23 preferably includes a tube made of polymethylpentene.

[0020] The tube 23 may have a structure in which, for example, multiple tubes of the same type or multiple tubes of different types are bundled together. The wall thickness of the tube 23, i.e., the thickness of the cylindrical wall 23a, is, for example, within a range of 5 μm to 5 mm. The inner diameter of the tube 23 is, for example, within a range of 3 mm to 10 mm.

[0021] 2 and 3, the chemical heat storage body 21 of this embodiment further includes a fixing member 24 that fixes the chemical heat storage member 22 to the flow path pipe 32. In detail, the chemical heat storage member 22 has a first end E1 and a second end E2 that are both ends of the chemical heat storage member 22. The fixing member 24 includes a first fixing member 25 that fixes the first end E1 of the chemical heat storage member 22 to the flow path pipe 32, and a second fixing member 26 that fixes the second end E2 of the chemical heat storage member 22 to the flow path pipe 32.

[0022] The fixing member 24 of this embodiment has a structure that can be fitted into the chemical heat storage member 22 arranged along the outer periphery of the flow path pipe 32. In detail, the fixing member 24 has a ring shape having a first opening end 24a and a second opening end 24b. The fixing member 24 is configured to be elastically deformable so that the first opening end 24a and the second opening end 24b are separated from each other, as shown by the arrows in Fig. 4. The space between the first opening end 24a and the second opening end 24b of the fixing member 24 forms an insertion portion into which the chemical heat storage member 22 arranged along the outer periphery of the flow path pipe 32 is inserted.

[0023] Examples of materials for the fixing member 24 include resin materials and metal materials. The fixing member 24 in this embodiment has a structure that allows it to be fitted by elastic deformation, but may have a structure that sandwiches the chemical heat storage member 22 between the flow path pipe 32 by plastic deformation. The fixing member 24 may also have a fastening structure such as a cable tie.

[0024] <How to install the chemical heat storage body 21> Next, an example of a method for attaching the chemical heat storage body 21 will be described. 4, to attach the chemical heat storage body 21 to the flow passage pipe 32, the first end E1 of the chemical heat storage member 22 is fixed by a first fixing member 25. Next, the chemical heat storage member 22 is spirally wound around the outer periphery of the flow passage pipe 32. At this time, the chemical heat storage member 22 can be disposed around the flow passage pipe 32 with the tube 23 of the chemical heat storage member 22 in contact with the flow passage pipe 32.

[0025] After the chemical heat storage member 22 is wound around the flow path pipe 32 in order from the first end E1 side to the second end E2 side, the second end E2 of the chemical heat storage member 22 is fixed by the second fixing member 26, as shown in Fig. 2. In this manner, the chemical heat storage member 22 can be easily attached around the flow path pipe 32.

[0026] <Method of manufacturing the chemical heat storage member 22 in the chemical heat storage body 21> Next, a manufacturing method of the chemical heat storage member 22 of the chemical heat storage body 21 will be described. The manufacturing method of the chemical heat storage member 22 includes an insertion step of inserting the chemical heat storage material HM into the hollow portion 23b of the tube 23 from the opening at the end of the tube 23. In the insertion step, for example, the chemical heat storage material HM may be inserted into the hollow portion 23b while the air in the hollow portion 23b of the tube 23 is sucked from the outside. Also, in the insertion step, for example, the chemical heat storage material HM may be inserted into the hollow portion 23b while vibration is applied to the tube 23.

[0027] The manufacturing method of the chemical heat storage member 22 may include a blocking step of blocking both ends of the tube 23 after the insertion step in order to prevent the chemical heat storage material HM from leaking from both ends of the tube 23. In the blocking step, for example, heat fusion of the tube 23, adhesive, a bundling member such as a cable tie, etc. may be used. In the blocking step, both ends of the hollow portion 23b of the tube 23 may be blocked by inserting blocking members into the hollow portion 23b from both ends of the tube 23. Examples of materials for the blocking members include polymeric materials such as resin and rubber, and metal materials. The blocking member may be a fiber aggregate such as a woven fabric or a nonwoven fabric.

[0028] <Operation of Chemical Heat Storage Reactor> Next, an example of the operation of the chemical heat storage reactor 11 will be described. (Heat storage operation) The heat storage operation is performed by a dehydration reaction of the chemical heat storage material HM. The dehydration reaction of the chemical heat storage material HM can be performed by heating the chemical heat storage material HM with the exhaust heat transported to the heat exchanger 31 of the chemical heat storage reactor 11 and lowering the water vapor pressure around the chemical heat storage body 21. The water vapor generated from the chemical heat storage material HM can be discharged to the outside of the chemical heat storage reactor 11 through the tube 23 of the chemical heat storage body 21 and the reaction medium flow path P2 of the pressure adjustment vessel 41 in order.

[0029] During the heat storage operation, for example, an absorber containing an absorbent that absorbs water vapor or a condenser that condenses water vapor is connected to the pressure regulating vessel 41. This makes it possible to reduce the water vapor pressure inside the pressure regulating vessel 41. Calcium chloride, which is a type of chemical heat storage material, can store heat by utilizing exhaust heat of 80°C when the water vapor pressure is 2 kPa, for example.

[0030] (Heat dissipation operation) The heat dissipation operation is performed by the hydration reaction of the chemical heat storage material HM. The hydration reaction of the chemical heat storage material HM can be performed by increasing the water vapor pressure around the chemical heat storage body 21. The chemical heat storage material HM can be contacted with water vapor through the reaction medium flow path P2 of the pressure adjusting container 41 and the tube 23 of the chemical heat storage body 21 in this order.

[0031] During the heat dissipation operation, for example, an evaporator that generates water vapor by utilizing exhaust heat is connected to the pressure regulating vessel 41. This makes it possible to increase the water vapor pressure inside the pressure regulating vessel 41. Calcium chloride, which is a type of chemical heat storage material, can dissipate heat of 170°C when the water vapor pressure is 95 kPa, for example.

[0032] <Actions and Effects of the First Embodiment> Next, the operation and effects of the first embodiment will be described. (1-1) The chemical heat storage body 21 is used for an application in which it is arranged around the flow path pipe 32 of the heat exchanger 31. The chemical heat storage body 21 includes a chemical heat storage member 22 that can be arranged in a spiral shape along the outer periphery of the flow path pipe 32. The chemical heat storage member 22 includes a tube 23 having a cylindrical wall 23a and a hollow portion 23b in the cylindrical wall 23a, and a chemical heat storage material HM arranged in the hollow portion 23b of the tube 23. The cylindrical wall 23a of the tube 23 is configured to be permeable to a reaction medium that reacts with the chemical heat storage material HM.

[0033] According to this configuration, by arranging the chemical heat storage member 22 in a spiral shape along the outer periphery of the flow path pipe 32 of the heat exchanger 31, the chemical heat storage material HM can be easily arranged around the flow path pipe 32. Furthermore, by the reaction medium passing through the cylindrical wall 23a of the tube 23 of the chemical heat storage member 22, the reaction medium can be brought into contact with the chemical heat storage material HM arranged in the hollow portion 23b of the tube 23. Therefore, the chemical heat storage material HM can be easily attached around the flow path pipe 32 of the heat exchanger 31 in a state in which it can come into contact with the reaction medium.

[0034] (1-2) The chemical heat storage body 21 further includes a plurality of fixing members 24 (first fixing members 25 and second fixing members 26) that fix the chemical heat storage member 22 to the flow path pipe 32 of the heat exchanger 31. In this case, it is possible to save the effort of separately preparing the fixing members 24 that fix the chemical heat storage member 22 to the heat exchanger 31. Therefore, the chemical heat storage member 22 can be attached around the flow path pipe 32 of the heat exchanger 31 more easily.

[0035] (1-3) The chemical heat storage reactor 11 includes a heat exchanger 31 having a flow passage pipe 32 through which a heat medium flows, and a chemical heat storage body 21 disposed around the flow passage pipe 32. The chemical heat storage body 21 has the configuration described in the above section (1-1). In this case, for example, the chemical heat storage member 22 can be easily replaced.

[0036] (1-4) In the chemical heat storage reactor 11, the chemical heat storage body 21 further includes a first fixing member 25 that fixes the first end E1 to the flow path pipe 32, and a second fixing member 26 that fixes the second end E2 to the flow path pipe 32. In this case, the chemical heat storage member 22 can be fixed to the flow path pipe 32 with a simple configuration.

[0037] (1-5) In the chemical heat storage reactor 11, the fixing member 24 is not provided between the first end E1 and the second end E2, which are both ends of the chemical heat storage member 22, and only the first end E1 and the second end E2 of the chemical heat storage member 22 are fixed to the flow path pipe 32 by the fixing member 24. In this case, the reaction medium can be efficiently circulated in the portion between the first end E1 and the second end E2 of the chemical heat storage member 22.

[0038] (1-6) It is preferable that the tube 23 of the chemical heat storage material 22 includes a tube made of polymethylpentene. In this case, for example, the reaction of the chemical heat storage material HM using water as a reaction medium can be efficiently carried out by utilizing the water vapor permeability of polymethylpentene.

[0039] [Second embodiment] The second embodiment of the chemical heat storage body 21 and the chemical heat storage reactor 11 will be described, focusing on the differences from the first embodiment.

[0040] 5 and 6, in the chemical heat storage reactor 11 of the second embodiment, the heat exchanger 31 includes a plurality of heat transfer members 35 connected to the flow path pipe 32. The heat transfer members 35 are disposed so as to contact the tubes 23 of the chemical heat storage member 22.

[0041] The heat transfer members 35 are arranged at intervals along the length of the flow path tube 32. The heat transfer members 35 include a first heat transfer member 36, a second heat transfer member 37, and a third heat transfer member 38. The shape of the heat transfer member 35 is, for example, a plate shape extending in a direction intersecting the length of the flow path tube 32. The shape of 35a in this embodiment is a circle in a plan view, but may be a polygonal plate shape such as a triangle or a square, or an ellipse. The heat transfer member 35 has a tube insertion portion 35a into which the tube 23 can be inserted in a part of the circumferential direction. By inserting a part of the length of the tube 23 into the tube insertion portion 35a, the tube 23 can be easily arranged so as to straddle the heat transfer member 35. The tube insertion portion 35a in this embodiment is, for example, a recessed portion having a shape in which a part of the outer periphery of the heat transfer member 35 is cut out. The tube insertion portion 35a may be a through hole through which the tube 23 is inserted.

[0042] As shown in Figure 7, the chemical heat storage member 22 has a first heat storage section 22a arranged between the first heat transfer member 36 and the second heat transfer member 37, and a second heat storage section 22b arranged between the second heat transfer member 37 and the third heat transfer member 38.

[0043] The first heat storage unit 22a is arranged such that the tubes 23 of the chemical heat storage member 22 are arranged in a plurality of layers in the radial direction of the flow path pipe 32. In the first heat storage unit 22a of this embodiment, the tubes 23 of the chemical heat storage member 22 are arranged in two layers in the radial direction of the flow path pipe 32.

[0044] The second heat storage unit 22b is arranged such that the tubes 23 of the chemical heat storage member 22 form a smaller number of layers in the radial direction of the flow path pipe 32 than the first heat storage unit 22a. In the second heat storage unit 22b of this embodiment, the tubes 23 of the chemical heat storage member 22 are arranged such that the tubes 23 of the chemical heat storage member 22 form a single layer in the radial direction of the flow path pipe 32.

[0045] The first heat transfer member 36, the second heat transfer member 37, and the third heat transfer member 38 are all made of a porous material that allows the reaction medium to pass through. Examples of the porous material include metal mesh, punching metal, and porous ceramics.

[0046] <Actions and Effects of the Second Embodiment> Next, the operation and effects of the second embodiment will be described. (2-1) The chemical heat storage body 21 and the chemical heat storage reactor 11 of the second embodiment can also obtain the functions and effects described in (1-1) to (1-6) of the first embodiment.

[0047] (2-2) In the chemical heat storage reactor 11, the heat exchanger 31 further includes a heat transfer member 35 that is connected to the flow path pipe 32 and is arranged so as to be in contact with the tube 23 of the chemical heat storage member 22. In this case, a heat transfer path is provided between the chemical heat storage member 22 and the flow path pipe 32 by the heat transfer member 35, so that, for example, the heat generated during the exothermic reaction of the chemical heat storage material HM can be extracted more efficiently by the heat exchanger 31.

[0048] (2-3) In the chemical heat storage reactor 11, the heat exchanger 31 includes a plurality of heat transfer members 35. The plurality of heat transfer members 35 are arranged at intervals along the longitudinal direction of the flow path pipe 32. In this case, for example, it becomes possible to more efficiently extract heat during the exothermic reaction of the chemical heat storage material HM by the heat exchanger 31.

[0049] (2-4) In the chemical heat storage reactor 11, the chemical heat storage member 22 has a first heat storage section 22a arranged between the first heat transfer member 36 and the second heat transfer member 37, and a second heat storage section 22b arranged between the second heat transfer member 37 and the third heat transfer member 38. The first heat storage section 22a is arranged such that the tubes 23 of the chemical heat storage member 22 are arranged in a plurality of layers in the radial direction of the flow path pipe 32. The second heat storage section 22b is arranged such that the tubes 23 of the chemical heat storage member 22 are arranged in a smaller number of layers than the first heat storage section 22a in the radial direction of the flow path pipe 32. The second heat transfer member 37 is made of a porous material that is permeable to the reaction medium. In this case, more chemical heat storage material HM can be arranged around the flow path pipe 32, and the second heat transfer member 37 can ensure a reaction medium flow path P2 including through holes of the porous material, as shown by the white arrow in FIG. 7. Therefore, for example, the chemical heat storage material HM and the reaction medium come into contact more easily, and it is possible to increase the reaction efficiency of the chemical heat storage material HM.

[0050] <Example of change> The above embodiment may be modified as follows: The above embodiment and the following modified examples may be implemented in combination with each other to the extent that there is no technical contradiction.

[0051] In the chemical heat storage reactor 11 in the first embodiment, the heat exchanger 31 may further include a heat transfer member connected to the flow passage pipe 32 and arranged so as to be in contact with the tube 23. The heat transfer member may be made of a non-porous material, or may be made of a porous material that is permeable to the reaction medium.

[0052] In the chemical heat storage reactor 11 in the first embodiment, the chemical heat storage members 22 may be arranged such that the tubes 23 are arranged in a plurality of layers in the radial direction of the flow passage pipe 32 . The first heat storage unit 22a of the chemical heat storage reactor 11 in the second embodiment may be arranged such that the tubes 23 of the chemical heat storage member 22 are arranged in three or more layers in the radial direction of the flow path pipe 32. Furthermore, the second heat storage unit 22b may be arranged such that the tubes 23 of the chemical heat storage member 22 are arranged in two or more layers in the radial direction of the flow path pipe 32. The number of stacked tubes 23 in the first heat storage unit 22a is preferably seven layers or less, and more preferably five layers or less, from the viewpoint of suppressing a decrease in thermal conductivity between the chemical heat storage member 22 and the flow path pipe 32, for example.

[0053] In the heat exchanger 31 of the chemical heat storage reactor 11 in the second embodiment, the heat transfer member 35 may be made of a non-porous material. For example, only the second heat transfer member 37 may be made of a porous material, and the first heat transfer member 36 and the third heat transfer member 38 may be made of a non-porous material.

[0054] The heat exchanger 31 of the chemical heat storage reactor 11 in the second embodiment is provided with a plurality of heat transfer members 35 spaced apart along the longitudinal direction of the flow tube 32, but the number of heat transfer members 35 may be one.

[0055] In the chemical heat storage reactor 11 of each embodiment, the fixing member 24 may be omitted, and the tube 23 of the chemical heat storage member 22 may be fixed to the flow passage pipe 32 of the heat exchanger 31 using a separately prepared adhesive.

[0056] In the chemical heat storage reactor 11 of each embodiment, a sheet material permeable to the reaction medium can be wound in a roll shape around the outer circumference of the tube 23 of the chemical heat storage member 22. In this case, by fastening the sheet material permeable to the reaction medium to the chemical heat storage member 22, the adhesion between the tube 23 of the chemical heat storage member 22 and the flow path tube 32 of the heat exchanger 31 can be improved. This makes it possible to suppress the heat transfer resistance between the chemical heat storage member 22 and the flow path tube 32, so that, for example, the heat during the heat dissipation reaction of the chemical heat storage material HM can be more efficiently extracted by the heat exchanger 31. Examples of the sheet material permeable to the reaction medium include a non-porous sheet made of a resin material, a porous sheet made of a resin material, a metal mesh, and a punching metal. Such a sheet material permeable to the reaction medium can be fixed, for example, by the fixing member 24 described above. [Explanation of symbols]

[0057] 11...Chemical heat storage reactor 21...Chemical heat storage body 22...Chemical heat storage material 22a...First heat storage section 22b...Second heat storage section 23…Tube 23a…Cylindrical wall 23b...Hollow part 24…Fixing member 25…First fixing member 26...Second fixing member 31...Heat exchanger 32...Flow pipe 35...Heat transfer components 36…First heat transfer member 37...Second heat transfer member 38…Third heat transfer member E1...first end E2…Second end HM…Chemical heat storage material

Claims

1. A chemical heat storage medium for use in an application in which the chemical heat storage medium is disposed around a flow tube of a heat exchanger, a chemical heat storage member that can be arranged in a spiral shape along an outer periphery of the flow path pipe; The chemical heat storage member is a tube having a cylindrical wall and a hollow portion within the cylindrical wall; A chemical heat storage material is disposed in the hollow portion of the tube, The chemical heat storage body is configured so that the cylindrical wall is permeable to a reaction medium that reacts with the chemical heat storage material.

2. The chemical heat storage body according to claim 1 , further comprising a plurality of fixing members for fixing the chemical heat storage member to the flow tube.

3. a heat exchanger having a flow path pipe through which a heat medium flows; A chemical heat storage medium is disposed around the flow tube, The chemical heat storage body includes a chemical heat storage member arranged in a spiral shape along an outer periphery of the flow path pipe, The chemical heat storage member is a tube having a cylindrical wall and a hollow portion within the cylindrical wall; A chemical heat storage material is disposed in the hollow portion of the tube, The chemical heat storage reactor, wherein the cylindrical wall is configured to be permeable to a reaction medium of the chemical heat storage material.

4. The chemical heat storage reactor of claim 3, further comprising a first fixing member that fixes the first end to the flow path pipe, and a second fixing member that fixes the second end to the flow path pipe, the first end and the second end being the two ends of the chemical heat storage member.

5. 4. The chemical heat storage reactor of claim 3, wherein the tube comprises a polymethylpentene tube.

6. The chemical heat storage reactor according to claim 3 , wherein the heat exchanger further comprises a heat transfer member connected to the flow pipe and disposed in contact with the tube.

7. 7. The chemical heat storage reactor according to claim 6, wherein the heat exchanger comprises a plurality of the heat transfer members, the plurality of heat transfer members being spaced apart along a length direction of the flow tube.

8. the plurality of heat transfer members include a first heat transfer member, a second heat transfer member, and a third heat transfer member; The chemical heat storage member is a first heat storage portion disposed between the first heat transfer member and the second heat transfer member; a second heat storage portion disposed between the second heat transfer member and the third heat transfer member, The first heat storage portion is The tubes of the chemical heat storage material are arranged in a plurality of layers in the radial direction of the flow path pipe, The second heat storage section is The tubes of the chemical heat storage material are arranged in a radial direction of the flow passage pipe so as to have a smaller number of layers than the first heat storage unit, The chemical heat storage reactor according to claim 7 , wherein the second heat transfer member is made of a porous material that is permeable to the reaction medium.

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