JP7120940B2 - Hydrogen storage module, hydrogen storage device and finned tube - Google Patents

Description

The present invention relates to hydrogen storage modules, hydrogen storage devices and finned tubes.

In recent years, hydrogen supply facilities for supplying hydrogen to fuel cell vehicles, fuel cell forklifts, etc. have been developed. Methods for storing hydrogen in this hydrogen supply facility include storage using liquid hydrogen, storage using compressed gas, storage after conversion to organic hydride, storage using a hydrogen storage alloy, and the like. Among these methods, storage using a hydrogen storage alloy is widely considered for use because it can increase the storage density per unit volume.

A hydrogen storage device capable of storing hydrogen using a hydrogen storage alloy includes a heat transfer medium pipe, fins fixed to the outer peripheral surface of the heat transfer pipe, and a hydrogen storage alloy filled on the outer peripheral surface side of the heat transfer pipe. It has been proposed to house the device inside (see Japanese Unexamined Patent Application Publication No. 2004-132503).

JP-A-2004-132503

Today, from the viewpoint of preventing uneven distribution of the hydrogen storage alloy in the container, holding the hydrogen storage alloy on the outer peripheral surface side of the heat transfer pipe is being studied. Specifically, we are considering dispersing the hydrogen storage alloy in a binder and fixing the binder to the outer peripheral surface of the heat transfer pipe so that the hydrogen storage alloy is held on the outer peripheral surface of the heat transfer pipe. It is

On the other hand, the hydrogen storage function of the hydrogen storage alloy may deteriorate with use. However, if the hydrogen storage alloy is held on the outer peripheral surface side of the heat transfer pipe in the conventional hydrogen storage device, the replacement cost of the hydrogen storage alloy increases. That is, when replacing the hydrogen storage alloy in the above-described conventional hydrogen storage device, it is necessary to replace the hydrogen storage alloy together with the heat transfer pipe holding the hydrogen storage alloy. However, since the heat medium pipes are fixed to the container by welding or the like, it is not easy to replace the heat medium pipes, and the cost required for the replacement work increases. In addition, when manufacturing a new heat transfer pipe, it is necessary to go through various tests such as material selection and pressure resistance test, which increases the manufacturing cost.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hydrogen storage module, a hydrogen storage device, and a finned tube in which the hydrogen storage alloy can be easily replaced.

A hydrogen storage module according to one aspect of the present invention, which has been devised to solve the above problems, comprises a multi-tube having a heat medium flow path therein, a hydrogen storage alloy held in a fin portion, and an outer peripheral surface of the multi-tube. A finned tube inserted against the side, and a heat transfer sheet arranged between the multiple tube and the finned tube.

The hydrogen storage module is configured such that a finned tube covers the outer peripheral surface side of the multiple tube via a heat transfer sheet, and the finned tube can be inserted into and removed from the multiple tube. In the hydrogen storage module, since the heat transfer sheet is arranged between the finned tube and the multiple tube, it is possible to provide a clearance between the outer peripheral surface of the multiple tube and the inner peripheral surface of the finned tube. is. Therefore, in the hydrogen storage module, the finned tube holding the hydrogen storage alloy can be easily extracted from the multiple tube, and a new finned tube holding the hydrogen storage alloy can be easily inserted into the multiple tube. . This allows the hydrogen storage module to easily replace the hydrogen storage alloy.

The heat transfer sheet may connect the multiple pipes and the finned pipes. In this way, by connecting the multiple pipes and the finned pipes with the heat transfer sheet, heat exchange between the heat medium and the hydrogen-absorbing alloy can be easily and reliably performed.

The heat transfer sheet may wrap around the outer peripheral surface of the multiple tube. In this way, the heat transfer sheet wraps around the outer peripheral surface of the multiple pipe, so that the heat transfer sheet can be easily arranged on the outer peripheral surface of the multiple pipe without gaps.

A hydrogen storage device according to another aspect of the present invention, which has been made to solve the above problems, includes the hydrogen storage module.

Since the hydrogen storage device includes the hydrogen storage module, the hydrogen storage alloy can be easily replaced.

A finned tube according to another aspect of the present invention, which has been made to solve the above problems, is used in the hydrogen storage module, holds the hydrogen storage alloy in the fin portion, and can be inserted into and removed from

The finned tube allows easy replacement of the hydrogen storage alloy of the hydrogen storage module.

As described above, in the hydrogen storage module, hydrogen storage device and finned tube of the present invention, the hydrogen storage alloy can be easily replaced.

1 is a schematic diagram showing a hydrogen storage device according to one embodiment of the present invention; FIG. FIG. 2 is a schematic longitudinal sectional view showing a hydrogen storage module provided in the hydrogen storage device of FIG. 1; FIG. 3 is a schematic cross-sectional view of the hydrogen storage module of FIG. 2 taken along the line AA; FIG. 3 is a schematic perspective view showing a finned tube holding a hydrogen storage alloy of the hydrogen storage module of FIG. 2; FIG. 3 is a schematic perspective view showing a stack of multiple tubes and heat transfer sheets of the hydrogen storage module of FIG. 2;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. For the numerical values described in this specification, it is possible to arbitrarily combine the described upper limit values and lower limit values. In this specification, all numerical ranges from the upper limit to the lower limit that can be combined are described as suitable ranges.

[Hydrogen storage device]
A hydrogen storage device 1 of FIG. 1 is used, for example, in a hydrogen supply facility for supplying hydrogen to a fuel cell. For example, a fuel cell vehicle and a fuel cell forklift can be cited as objects on which this fuel cell is mounted. The hydrogen storage device 1 includes a plurality of hydrogen storage modules 2 and a casing 3 that accommodates the plurality of hydrogen storage modules 2 . As shown in FIGS. 2 and 3, the hydrogen storage module 2 includes a multiple pipe 11 having a heat medium flow path inside, a hydrogen storage alloy 13 held in the fin portion 12b, and an outer peripheral surface of the multiple pipe 11. A finned tube 12 inserted against the finned tube 12 and a heat transfer sheet 14 arranged between the multiple tube 11 and the finned tube 12 . The multiple pipe 11 is, for example, a double pipe consisting of an inner pipe 11a and an outer pipe 11b. The inner tube 11a and the outer tube 11b may be partially connected or separated. Both ends of the inner tube 11a and the outer tube 11b are open at one end side of the multiplex tube 11 (X direction side in FIG. 2). On the other hand, on the other end side of the multiplex tube 11 (opposite side in the X direction in FIG. 2), the end of the inner tube 11a is open, while the other end of the outer tube 11b is closed. In addition, on the other end side of the multiplex tube 11, the other end side opening of the inner tube 11a is spaced axially from the closed portion of the outer tube 11b. Thereby, the internal space S1 of the inner tube 11a communicates with the gap region S2 between the inner tube 11a and the outer tube 11b through the other end side opening of the inner tube 11a. Of the openings on the one end side of the multiplex tube 11, the opening of the inner tube 11a is configured as an inlet 21a through which the heat medium can flow into the internal space S1. A region sandwiched between the inner tube 11a and the outer tube 11b in the opening on the one end side of the multiplex tube 11 is configured as an outflow port 21b through which the heat medium can flow out from the gap area S2. The finned tube 12 is configured to be insertable and removable from the outer peripheral surface side of the multiplex tube 11 . There is no other layer such as an adhesive layer between the multi-layer tube 11 and the heat transfer sheet 14 and between the heat transfer sheet 14 and the finned tube 12 .

The hydrogen storage device 1 includes an inflow passage 15 communicating with the inflow port 21a of the multiplex tube 11, an outflow passage 16 communicating with the outflow port 21b of the multiplex tube 11, and a first holding member that holds one end side of the outer tube 11b. 17a, a second holding member 17b that holds one end of the inner tube 11b, and a support member 18 that supports the other end of the multiplex tube 11 (the side opposite to the side communicating with the inflow passage 15 and the outflow passage 16). Prepare. The first holding member 17a is plate-shaped, for example. The first holding member 17a has a plurality of first holes into which the plurality of outer tubes 11b are inserted, and which are joined to the outer peripheral surface of the outer tubes 11b at their peripheral edge portions. The second holding member 17b is plate-shaped, for example. The second holding member 17b has a plurality of second holes into which the plurality of inner tubes 11a are inserted, and which are joined to the outer peripheral surface of the inner tubes 11a at the periphery. In such a configuration, the hydrogen storage device 1 has an inflow passage 15 defined by a space surrounded by the second holding member 17b and the casing 3 on the side where the opening of the inner pipe 11a is exposed. A region surrounded by the holding member 17b and the casing 3 constitutes an outflow passage 16. As shown in FIG.

The first holding member 17a may be configured to be detachable from the outer tube 11b. However, the outer tube 11b is securely fixed at a predetermined position in the casing 3, and the operation of inserting and removing the finned tube 12 can be performed easily and reliably. It may be constructed such that it cannot be attached or detached from the outer tube 11b or is difficult to attach or detach. Further, the outer tube 11b functions as a member that partitions the hydrogen gas atmosphere space inside the casing 3. As shown in FIG. Therefore, by making the outer tube 11b non-detachable or difficult to detach from the first holding member 17a, it is possible to easily prevent hydrogen leakage due to detachment of the outer tube 11b. On the other hand, it is preferable that the inner tube 11a is detachably configured, for example, together with the second holding member 17b. The inner pipe 11 a does not need to function as a member that partitions the hydrogen gas atmosphere space inside the casing 3 . Therefore, it is preferable that the inner tube 11a can be extracted from the outer tube 11b as needed so that cleaning and maintenance can be facilitated.

The support member 18 is configured to be detachable from the plurality of multi-pipes 11 . In other words, by removing the support member 18, the multiple pipes 11 can be held in a cantilever manner by the first holding member 17a and the second holding member 17b on the side communicating with the inflow path 15 and the outflow path 16. It is The multi-pipe 11 has a layered region where the heat transfer sheets 14 and the finned tubes 12 are layered in a region sandwiched between the connection portions with the first holding member 17a and the support member 18 .

<Hydrogen storage module>
The hydrogen storage module 2 itself constitutes an aspect of the invention. The hydrogen storage module 2 is configured to be able to store hydrogen using a hydrogen storage alloy 13 . Further, the hydrogen storage module 2 is configured to release hydrogen occluded by the hydrogen storage alloy 13 so as to supply hydrogen to the fuel cell.

(multiple tubes)
The multi-pipe 11 is straight. As mentioned above, the multiple tube 11 has an inner tube 11a and an outer tube 11b. The inner tube 11a and the outer tube 11b are, for example, cylindrical. The outer peripheral surface of the outer tube 11b constitutes the outer peripheral surface of the multiplex tube 11 (that is, the outermost peripheral surface of the multiplex tube 11). The inner tube 11a is arranged by being inserted radially inside the outer tube 11b. The edge of the inner tube 11a on the one end side protrudes from the edge of the outer tube 11b on the one end side. The inner tube 11a may be fitted to the second holding member 17b, welded, or otherwise joined. Also, the outer tube 11b may be fitted to the first holding member 17a, welded, or joined by other methods.

The internal space S1 of the inner tube 11a and the gap space S2 between the inner tube 11a and the outer tube 11b are configured as flow paths for the heat medium for cooling or heating the hydrogen storage alloy 13. As shown in FIG. The hydrogen storage module 2 promotes hydrogen storage by the hydrogen storage alloy 13 by allowing the cooling heat medium to flow through the flow path. On the other hand, the hydrogen storage module 2 promotes hydrogen release by the hydrogen storage alloy 13 by causing the heating heat medium to flow through the flow path.

The multiplex tube 11 is a heat transfer tube. More specifically, the multiple tube 11 is, for example, a bayonet type double heat transfer tube. In the hydrogen storage module 2, the multi-pipe 11 can be easily fixed in the casing 3 in a cantilevered manner because the multi-pipe 11 is a bayonet type double heat transfer tube. This makes it easy to insert and remove the finned tube 12 from the other end side of the multiplex tube 11 .

As described above, the opening on the other end side of the outer tube 11b is closed. In other words, the multi-pipe 11 is configured such that the heat medium that has flowed in from the opening (inlet 21a) on one end side flows out from the opening (outlet 21b) on the one end side. As a result, the multi-pipe 11 does not need to communicate with another flow path on the other end side. As a result, the finned tube 12 can be easily inserted and removed from the other end side of the multiplex tube 11 .

A plurality of multiple tubes 11 are arranged in parallel. For example, the multiple tubes 11 may be arranged with their central axes parallel to the horizontal direction, or may be arranged with their central axes parallel to the vertical direction. By arranging the plurality of multiple tubes 11 in parallel with the vertical direction, the hydrogen storage device 1 can reduce the installation area of the entire device and facilitate space saving.

Examples of the main component of the multiple tube 11 include aluminum, an aluminum alloy, stainless steel, and the like. In addition, a "main component" means a component with the largest content in terms of mass.

(heat medium)
The heat medium is not particularly limited as long as it can exchange heat with the hydrogen storage alloy 13, and examples thereof include water, oil, long-life coolant, air, and steam.

(finned tube)
The finned tube 12 itself constitutes an aspect of the invention. The finned tube 12 is a cartridge that can be inserted into and removed from the multiplex tube 11 . As shown in FIG. 4, the finned tube 12 has a tubular trunk portion 12a and fin portions 12b fixed to the outer peripheral surface of the trunk portion 12a. The finned tube 12 is, for example, a finned tube in which a fin portion 12b is fixed to the outer peripheral surface of a body portion 12a, which is a heat transfer tube. The finned tube 12 holds a hydrogen storage alloy 13 on the outer peripheral surface side of the body portion 12a. The hydrogen storage alloy 13 is held between the fin portions 12b. Specifically, the hydrogen storage alloy 13 is, for example, a binder 19 mainly composed of a synthetic resin having a softening point higher than the release heating temperature of hydrogen stored in the hydrogen storage alloy 13, preferably 100° C. or higher. Since the binder 19 adheres to the outer peripheral surface of the trunk portion 12a, it is held on the outer peripheral surface side of the trunk portion 12a via the binder 19. As shown in FIG. As a result, the finned tube 12 and the hydrogen storage alloy 13 are formed integrally, that is, difficult to separate. Examples of the synthetic resin include thermosetting resins such as phenol resins, melamine resins, silicon resins and polyurethanes, and thermoplastic resins such as polypropylene, polyethylene and celluloid. The finned tube 12 is configured to be insertable and removable from the free end side (the other end side) of the multiplex tube 11 while the multiplex tube 11 is held in a cantilever shape at one end side.

(torso)
The trunk portion 12a has a straight tubular shape. The shape of the cross section of the inner peripheral surface of the body 12a (the cross section perpendicular to the central axis) is substantially the same as the shape of the cross section of the outer peripheral surface of the multiple tube 11 (that is, the outer peripheral surface of the outer tube 11b). The trunk portion 12a is, for example, cylindrical. The average outer diameter D1 of the multiple tube 11 is slightly smaller than the average inner diameter D2 of the body portion 12a. The lower limit of the difference between the average inner diameter D2 of the trunk portion 12a and the average outer diameter D1 of the multiple tube 11 is preferably 0.5 mm, more preferably 1.0 mm. On the other hand, the upper limit of the difference is preferably 2.0 mm, more preferably 1.5 mm. If the above difference is less than the above lower limit, it may not be easy to insert and remove the finned tube 12 into and out of the multiple tube 11 . Conversely, if the difference exceeds the upper limit, it may be difficult to easily and reliably connect the multiple tube 11 and the body portion 12a with the heat transfer sheet 14 . In addition, the "inner diameter" means the inner diameter when converted into a perfect circle with an equal area, and the "outer diameter" means an outer diameter when converted into a perfect circle with an equal area. The "average inner diameter" means the average value of the inner diameters at arbitrary 10 points in the axial direction, and the "average outer diameter" means the average value of the outer diameters at arbitrary 10 points in the axial direction.

The trunk portion 12a has a sleeve shape with both axial sides open. The average thickness (difference between the average outer diameter and the average inner diameter) of the body portion 12a is preferably smaller than the average thickness of the outer tube 11b. As a minimum of average thickness of drum section 12a, 1.0 mm is preferred and 1.5 mm is more preferred. On the other hand, the upper limit of the average thickness is preferably 3.0 mm, more preferably 2.5 mm. If the average thickness is less than the lower limit, the strength of the trunk portion 12a may be insufficient. Conversely, if the average thickness exceeds the upper limit, the manufacturing cost of the body portion 12a increases, which may increase the replacement cost of the finned tube 12. The work may not be easy.

Main components of the trunk portion 12a include, for example, aluminum, an aluminum alloy, and stainless steel.

(Fin part)
The fin portion 12b is formed integrally with the body portion 12a, for example, from the same material as that of the body portion 12a. The fin portion 12b is spirally wound along the axial direction of the trunk portion 12a. In the hydrogen storage device 1, since the fins 12b are spiral as described above, the contact area between the fins 12b and the binder 19 can be relatively large, and the hydrogen storage alloy 13 can be easily removed from the finned tube 12. easy to prevent. Further, by forming the fin portion 12b in a spiral shape, the construction of the fin portion 12b is facilitated.

The lower limit of the average pitch P of the fin portions 12b in the axial direction of the trunk portion 12a is preferably 5 mm, more preferably 10 mm. On the other hand, the upper limit of the average pitch P is preferably 25 mm, more preferably 20 mm. If the average pitch P is less than the lower limit, the filling amount of the hydrogen storage alloy 13 may not be sufficiently increased. Conversely, if the average pitch P exceeds the upper limit, the heat exchange amount of the hydrogen-absorbing alloy 13 may become insufficient, or the contact area between the fin portion 12b and the binder 19 may become insufficient, causing the hydrogen-absorbing alloy 13 to It may become difficult to sufficiently hold between the fin portions 12b.

(Hydrogen storage alloy)
The hydrogen storage alloy 13 is filled between the fin portions 12b on the outer peripheral surface side of the trunk portion 12a. The hydrogen storage alloy 13 is an alloy that can store and release hydrogen by controlling pressure or temperature. As the hydrogen storage alloy 13, a known one can be used, and examples thereof include binary alloys, ternary alloys, quaternary alloys, and quinary alloys.

Examples of the binary alloy include LaNi alloys such as LaNi ₅ , TiFe alloys, MnNi alloys, CaNi alloys, TiMn alloys, TiZr alloys, and ZrMn alloys.

_Examples of the _ternary system _{alloy include TiCrV system alloys such as Ti25Cr50V25 , Ti25Cr25V50 and Ti20Cr45V35 ;} TiCrMn-based alloys, TiVMo-based alloys, and the like are included.

_Examples of the _{quaternary alloy include TiCrVMo alloys} such as _{Ti30Cr45V10Mo15} and _{Ti25Cr50V20Mo5 ; TiCrVFe alloys such} as _{Ti25Cr44V25Fe6 ;} TiCrVNi alloys such as V ₂₀ Ni ₅ and the like are included.

Examples of the _{quinary alloys} include _{TiCrVMoNi alloys} such as _{Ti11Cr12V71Mo5Ni1} .

(heat transfer sheet)
The heat transfer sheet 14 is interposed between the multiple pipe 11 and the body portion 12a, and contacts the outer peripheral surface of the multiple pipe 11 and the inner peripheral surface of the body portion 12a. The heat transfer sheet 14 connects the multiple pipes 11 and the finned pipes 12 . Thereby, the hydrogen storage device 1 can easily and reliably perform heat exchange between the heat medium and the hydrogen storage alloy 13 . The heat transfer sheet 14 tries to spread outward on the outer peripheral surface of the multiple tube 11, thereby pressing the inner peripheral surface side of the trunk portion 12a. Thereby, the heat transfer sheet 14 is configured so as to be able to fix the finned tube 12 to the outer peripheral surface side of the multiplex tube 11 . The heat transfer sheet 14 also functions as a cushioning material that prevents the body portion 12a from rubbing against the multiple tube 11 when the finned tube 12 is inserted or removed. That is, by including the heat transfer sheet 14, the hydrogen storage device 1 can suppress damage caused by rubbing between the multiple tube 11 and the body portion 12a, and sufficiently enhance the heat transfer function of the hydrogen storage module 2. .

The heat transfer sheet 14 is mainly composed of aluminum, for example. In the hydrogen storage module 2, a single layer body composed of one heat transfer sheet 14 may be interposed between the multi-layer tube 11 and the body portion 12a, and multiple layers of heat transfer sheets 14 may be laminated. It may be interposed between the tube 11 and the body 12a. The heat transfer sheet 14 preferably covers the entire surface of the multiple pipe 11 facing the body portion 12a.

The lower limit of the average thickness of the heat transfer sheet 14 (one sheet) is preferably 0.05 mm, more preferably 0.1 mm. On the other hand, the upper limit of the average thickness is preferably 1.0 mm, more preferably 0.5 mm. If the average thickness is less than the lower limit, the strength of the heat transfer sheet 14 is insufficient, and the heat transfer sheet 14 may break when the finned tube 12 is inserted. Conversely, if the average thickness exceeds the upper limit, the heat transfer sheet 14 becomes unnecessarily thick, and the heat transfer sheet 14 may interfere with the insertion of the finned tubes 12 .

As shown in FIG. 5, it is preferable that the heat transfer sheet 14 is wound around the outer peripheral surface of the multiple tube 11 . This makes it easy to arrange the heat transfer sheet 14 on the outer peripheral surface of the multiple pipe 11 without gaps.

The heat transfer sheet 14 is, for example, a rectangular (more specifically rectangular) sheet. The heat transfer sheet 14 is arranged, for example, such that the sides extending in the longitudinal direction are parallel to the central axis of the multiple pipe 11 . The heat transfer sheet 14 is laminated on the outer peripheral surface of the outer tube 11b by winding it around the outer peripheral surface of the outer tube 11b along the lateral direction. According to this configuration, the heat transfer sheet 14 can be easily covered on the outer peripheral surface of the multiple tube 11 without gaps. As a result, the multiple tube 11 and the body portion 12a can be reliably connected by the heat transfer sheet 14 easily.

Moreover, the hydrogen storage module 2 may employ a configuration in which the heat transfer sheet 14 is spirally wound around the outer peripheral surface of the multiple tube 11 . According to this configuration, the side edge of the heat transfer sheet 14 and the circumferential direction of the multiple tube 11 are not parallel. Therefore, it becomes easy to insert and remove the finned tube 12 into and out of the multiple tube 11 while rotating it in the circumferential direction.

When the heat transfer sheet 14 is spirally wound around the outer peripheral surface of the multiple tube 11 , the heat transfer sheet 14 may be wound around the outer peripheral surface of the multiple tube 11 while partially or wholly overlapping the heat transfer sheet 14 . According to this configuration, the total thickness of the overlapped portion is larger than the thickness of the other portions, so that the multiple tube 11 and the trunk portion 12a can be connected more reliably at this overlapped portion.

(casing)
Casing 3 is a tank that houses a plurality of hydrogen storage modules 2 . The casing 3 is made mainly of aluminum, an aluminum alloy, stainless steel, or the like, for example. The casing 3 has a hydrogen inlet 3a capable of supplying hydrogen to the hydrogen storage alloys 13 of the plurality of hydrogen storage modules 2, and a hydrogen outlet capable of supplying hydrogen released from the hydrogen storage alloys 13 of the plurality of hydrogen storage modules 2 to the outside. 3b. A filter (not shown) is arranged at the hydrogen inlet 3a and the hydrogen outlet 3b. The casing 3 is configured such that, for example, the side walls 3c on the free end side (the side fixed by the support member 18) of the plurality of multiple tubes 11 can be removed. In addition, it is also possible for one opening to serve both as the hydrogen inlet 3a and the hydrogen outlet 3b. In addition, in the hydrogen storage device 1, the first holding member 17a functions as a partition wall that partitions the hydrogen gas atmosphere space, as will be described later. Therefore, the casing 3 may have different strengths and the like in the portions on both sides sandwiching the first holding member 17a, depending on the function thereof.

(Inflow path)
The inflow path 15 has a heat medium inlet 15a through which the heat medium described above can be introduced into the casing 3 . The inflow path 15 is configured to allow the heat medium introduced from the heat medium inlet 15a to be supplied from the inflow ports 21a of the multiple pipes 11 of the plurality of hydrogen storage modules 2 to the internal space S1.

(Outflow channel)
The outflow path 16 has a heat medium outlet 16 a capable of discharging the above heat medium to the outside of the casing 3 . The outflow path 16 is configured to be able to discharge the heat medium flowing out from the outflow port 21 b of the multi-pipe 11 of the plurality of waterway storage modules 2 to the outside of the casing 3 .

(Holding member)
The first holding member 17a and the second holding member 17b are mainly composed of, for example, aluminum, an aluminum alloy, stainless steel, or the like. The first holding member 17 a is fixed to the casing 3 . The first holding member 17a divides the space in which the opening on one side of the outer tube 11b is exposed in the casing 3 and the hydrogen gas atmosphere space. The second holding member 17b divides the space in which the opening on one side of the inner tube 11a is exposed in the casing 3 and the space in which the opening on one side of the outer tube 11b is exposed.

(support member)
The support member 18 is, for example, a punching plate having a plurality of openings into which the ends of the plurality of multiple tubes 11 on the free end side are inserted. The support member 18 is detachably connected to the inner surface of the casing 3 . The plurality of multiplex tubes 11 are held in a cantilever manner by a holding member 17 or the like by removing the support member 18 from the casing 3 and removing the support member 18 from the end of the multiplex tube 11 on the free end side.

<Procedure for inserting and removing the finned tube>
In the hydrogen storage module 2, for example, the side wall 3c of the casing 3 is removed and the support member 18 is removed. It is assembled by inserting the held finned tube 12 from the free end side of the multiple tube 11 . By inserting the finned tube 12 , the multiple tube 11 and the finned tube 12 are connected via the heat transfer sheet 14 . After assembling the hydrogen storage module 2, the side wall 3c of the casing 3 may be attached after attaching the supporting member 18. FIG. In the hydrogen storage module 2 , the heat transfer sheet 14 can be arranged between the multiplex tube 11 and the finned tube 12 after inserting the finned tube 12 into the multiplex tube 11 .

On the other hand, when removing the finned tube 12 from the hydrogen storage module 2, for example, the side wall 3c of the casing 3 is removed, the support member 18 is removed, and the finned tube 12 is pulled out from the free end side of the multiple tube 11. In the hydrogen storage module 2 , the hydrogen storage alloy 13 can be easily replaced by inserting and removing the finned tubes 12 into and out of the multiple tube 11 without removing the multiple tube 11 fixed to the casing 3 .

<Advantages>
The hydrogen storage module 2 has a finned tube 12 covering the outer peripheral surface side of the multiple tube 11 via a heat transfer sheet 14 , and the finned tube 12 can be inserted into and removed from the multiple tube 11 . In the hydrogen storage module 2, since the heat transfer sheet 14 is arranged between the finned tube 12 and the multiplex tube 11, a clearance is provided between the outer peripheral surface of the multiplex tube 11 and the inner peripheral surface of the finned tube 12. can be provided. Therefore, the hydrogen storage module 2 can easily extract the finned tube 12 holding the hydrogen storage alloy 13 from the multi-layer tube 11, and replace the finned tube 12 holding the new hydrogen storage alloy 13 with the multi-layer tube 11. Can be easily inserted. Thereby, the hydrogen storage module 2 can easily replace the hydrogen storage alloy 13 .

Since the hydrogen storage device 1 includes the hydrogen storage module 2, the hydrogen storage alloy 13 can be easily replaced.

The finned tube 12 can be easily inserted into and removed from the multiplex tube 11, so that the hydrogen storage alloy 13 of the hydrogen storage module 2 can be easily replaced.

[Other embodiments]
The above embodiments do not limit the configuration of the present invention. Therefore, in the above embodiment, the components of each part of the above embodiment can be omitted, replaced, or added based on the description of the present specification and common general technical knowledge, and all of them are interpreted as belonging to the scope of the present invention. should.

For example, the finned tube may have a fin portion formed by a plurality of fins. In this case, the plurality of fins may be provided, for example, in a flange shape spaced apart in the axial direction of the body, or may be provided in a spiral shape so as to wind the body along the axial direction, It may be provided so as to extend parallel to the axial direction.

As for the heat transfer sheet, a heat transfer sheet formed in a cylindrical shape in advance may be inserted into the outer peripheral surface of the multiple tube, or a plurality of heat transfer sheets may be used to cover the outer peripheral surface of the multiple tube. The heat transfer sheet preferably covers the entire surface of the multi-pipe facing the finned tube (more specifically, the body portion of the finned tube) as described above. The surface of the multi-pipe facing the finned tube may be partially covered if sufficient heat transfer between is obtained.

The inflow path and outflow path need not necessarily be provided in the casing. Further, the specific configuration of the inflow path and the outflow path is not particularly limited as long as they form a flow path through which the heat medium flows. The inflow path and the outflow path may be formed by spaces defined by holding members (first holding member and second holding member) connected to the inner tube and the outer tube as described above, and connected to the multiple tubes. may be formed by piping that is

The arrangement of the plurality of hydrogen storage modules is not limited to the configuration of the above embodiments. For example, the hydrogen storage device may be provided such that a plurality of hydrogen storage modules protrude toward the center from a pair of facing inner surfaces of the casing.

The hydrogen storage device does not necessarily have to have a plurality of hydrogen storage modules, and may have only one hydrogen storage module.

INDUSTRIAL APPLICABILITY As described above, the hydrogen storage module of the present invention allows the hydrogen storage alloy to be replaced easily and inexpensively, and is therefore suitable for enhancing the maintenance performance of the hydrogen storage device.

1 hydrogen storage device 2 hydrogen storage module 3 casing 3a hydrogen inlet 3b hydrogen outlet 3c side wall 11 multiple tube 11a inner tube 11b outer tube 12 finned tube 12a body portion 12b fin portion 13 hydrogen storage alloy 14 heat transfer sheet 15 inflow passage 15a heat Medium inlet 16 Outflow path 16a Heat medium outlet 17a First holding member 17b Second holding member 18 Support member 19 Binder 21a Inflow port 21b Outflow port P Pitch S1 Internal space S2 Gap region D1 Outer diameter D2 of multi-tube outer tube Finned tube inner diameter of barrel

Claims (5)

a multiple pipe having a heat medium flow path inside;
a finned tube that holds a hydrogen storage alloy in the fin portion and is inserted into the outer peripheral surface side of the multiple tube;
A hydrogen storage module comprising: a heat transfer sheet arranged between the multiple tubes and the finned tubes. 2. The hydrogen storage module according to claim 1, wherein the heat transfer sheet connects the multiple tubes and the finned tubes. 3. The hydrogen storage module according to claim 1, wherein the heat transfer sheet is wound around the outer peripheral surface of the multiple tube. A hydrogen storage device comprising the hydrogen storage module according to claim 1, 2 or 3. used in the hydrogen storage module according to claim 1, claim 2 or claim 3,
A tube with fins that holds the hydrogen storage alloy in the fin portion and that can be inserted into and removed from the outer peripheral surface side of the multiplex tube.

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