Hydrogen storage and supply device

Abstract

To provide a hydrogen storage and supply device capable of efficiently storing and supplying hydrogen gas.SOLUTION: A hydrogen storage and supply device 1A includes a storage section 2 containing a storage material capable of absorbing and releasing hydrogen gas, and a heat storage section 3 containing a heat storage material that stores heat released from the storage section 2 during hydrogen gas absorption and supplies heat required for hydrogen gas release to the storage section 2. Multiple such storage sections 2 and heat storage sections 3 are provided, and the storage sections 2 and the heat storage sections 3 are alternately arranged in a predetermined direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The technology disclosed in this specification relates to a hydrogen storage and supply device. [Background technology]

[0002] In the technical field related to hydrogen storage and supply devices, a gas storage and supply system such as that disclosed in Patent Document 1 is known. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-215125 Summary of the Invention [Problem to be solved by the invention]

[0004] The technology disclosed in this specification aims to provide a hydrogen storage and supply device that can efficiently store and supply hydrogen gas. [Means for solving the problem]

[0005] This specification discloses a hydrogen storage and supply device. The hydrogen storage and supply device includes a storage unit containing a storage material capable of absorbing and releasing hydrogen gas, and a heat storage unit containing a heat storage material that stores heat released from the storage unit during the absorption of hydrogen gas and provides the storage unit with the heat necessary for releasing the hydrogen gas. A plurality of storage units and a plurality of heat storage units are provided. The storage units and the heat storage units are arranged alternately in a predetermined direction. [Effects of the Invention]

[0006] According to the technology disclosed in this specification, a hydrogen storage and supply device capable of efficiently storing and supplying hydrogen gas is provided. [Brief explanation of the drawings]

[0007] [Figure 1]FIG. 1 is a diagram schematically showing a hydrogen storage and supply device according to a first embodiment. [Figure 2] FIG. 2 is a diagram schematically showing a hydrogen storage and supply device according to the second embodiment. [Figure 3] FIG. 3 is a diagram schematically showing a hydrogen storage and supply device according to a third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings, but the present disclosure is not limited to the embodiments. The components of the embodiments described below can be combined as appropriate. In addition, some components may not be used.

[0009] In the embodiments, the positional relationship of each part is described using the terms "upper," "lower," "front," "rear," "left," and "right." These terms indicate relative positions or directions based on the center of the hydrogen storage and supply device.

[0010] [First embodiment] A first embodiment will be described.

[0011] 1 is a diagram schematically illustrating a hydrogen storage and supply device 1A according to this embodiment. As shown in FIG. 1, the hydrogen storage and supply device 1A includes a storage section 2, a heat storage section 3, a hydrogen gas line 4, and a working medium line 5.

[0012] The storage unit 2 includes a storage material capable of absorbing and releasing hydrogen gas. The storage material is a material that can reversibly absorb and release hydrogen gas. The storage material releases heat when absorbing hydrogen gas and releases the stored hydrogen gas by absorbing heat. In other words, the storage unit 2 releases heat when absorbing hydrogen gas. The storage unit 2 releases hydrogen gas when heat is applied from the outside.

[0013] Storage materials include metals such as Mg or V, LaNi5, TiMn 1.5Examples include hydrogen storage alloys such as TiCrV, complex hydrides such as NaAlH4, adsorption-based hydrogen storage materials, and organic hydrides such as toluene.

[0014] The reservoir 2 is plate-shaped. If the reservoir material is a solid, the reservoir 2 may be a plate of the reservoir material. If the reservoir material is a liquid, the reservoir 2 may comprise a plate-shaped container for containing the liquid.

[0015] The heat storage unit 3 contains a heat storage material that stores the heat released from the storage unit 2 during the absorption of hydrogen gas and provides the storage unit 2 with the heat necessary to release the hydrogen gas. The heat storage material is a material that can reversibly undergo a reaction and a reverse reaction with the working medium. The heat storage material releases heat during a reaction with the working medium and stores heat during a reverse reaction with the working medium. In other words, the heat storage unit 3 desorbs the working medium when storing heat. The heat storage unit 3 provides heat to the outside by bonding with the working medium.

[0016] Examples of working fluids include water, ammonia, and hydrogen. Examples of heat storage materials using water as the working fluid include metal oxides such as CaO or MgO, metal halides such as CaCl2 or MgCl2, and metal sulfates such as CaSO4. Examples of heat storage materials using ammonia as the working fluid include metal halides and metal sulfates. Examples of heat storage materials using hydrogen as the working fluid include metals such as Mg or V, LaNi5, TiMn 1.5 Examples include hydrogen storage alloys such as TiCrV, complex hydrides such as NaAlH4, and organic hydrides such as toluene.

[0017] The heat storage unit 3 is plate-shaped. If the heat storage material is solid, the heat storage unit 3 may be a plate of the heat storage material. If the heat storage material is liquid, the heat storage unit 3 may include a plate-shaped container that contains the liquid.

[0018] In the embodiment, the external dimensions of the storage section 2 and the heat storage section 3 are the same. That is, the vertical dimensions of the storage section 2 and the heat storage section 3 are the same. The front-rear dimensions of the storage section 2 and the heat storage section 3 are the same. The left-right dimensions of the storage section 2 and the heat storage section 3 are the same. Each of the storage section 2 and the heat storage section 3 is a plate-like shape with the left-right direction being the thickness direction. In each of the storage section 2 and the heat storage section 3, the left-right dimension is smaller than the vertical dimension and the front-rear dimension.

[0019] A plurality of storage units 2 and a plurality of heat storage units 3 are provided. The storage units 2 and the heat storage units 3 are arranged alternately in the left-right direction. The storage units 2 and the heat storage units 3 are arranged so as to be in contact with each other.

[0020] At least one hydrogen gas line 4 is connected to each of the plurality of storage units 2. The hydrogen gas to be stored in the storage units 2 and the hydrogen gas released from the storage units 2 flow through the hydrogen gas lines 4.

[0021] At least one working medium line 5 is connected to each of the multiple heat storage units 3. The working medium vapor desorbed from the heat storage units 3 and the working medium vapor to be combined with the heat storage units 3 flow through the working medium lines 5.

[0022] Next, the operation of the hydrogen storage and supply device 1A will be described. When hydrogen gas is stored in the storage unit 2, the hydrogen gas to be stored in the storage unit 2 is supplied to the storage unit 2 via the hydrogen gas line 4. The storage unit 2, to which hydrogen gas has been supplied, releases heat when it absorbs the hydrogen gas. The heat storage unit 3 stores the heat released from the storage unit 2 when it absorbs the hydrogen gas. The heat storage unit 3 desorbs the working medium when it stores the heat released from the storage unit 2. The working medium vapor desorbed from the heat storage unit 3 is discharged via the working medium line 5.

[0023] When the hydrogen gas stored in the storage unit 2 is to be released from the storage unit 2, the vapor of the working medium to be coupled to the heat storage unit 3 is supplied to the heat storage unit 3 via the working medium line 5. When the vapor of the working medium is supplied to the heat storage unit 3 and the heat storage unit 3 and the working medium are coupled, the heat stored in the heat storage unit 3 is released from the heat storage unit 3. The heat released from the heat storage unit 3 is provided to the storage unit 2. The heat storage unit 3 provides the heat necessary for releasing the hydrogen gas to the storage unit 2. When the heat is provided by the heat storage unit 3, the storage unit 2 releases the stored hydrogen gas. The hydrogen gas released from the storage unit 2 is discharged via the hydrogen gas line 4.

[0024] As described above, according to this embodiment, the storage unit 2 and the heat storage unit 3 are arranged alternately in the left-right direction. When the storage unit 2 absorbs hydrogen gas, the heat released from the storage unit 2 is efficiently provided to the heat storage unit 3. The heat storage unit 3 can efficiently store the heat released from the storage unit 2. The storage unit 2 can efficiently store hydrogen gas. When hydrogen gas is released from the storage unit 2, the heat storage unit 3 provides the stored heat to the storage unit 2. The heat storage unit 3 can efficiently provide heat to the storage unit 2. The storage unit 2 can efficiently release hydrogen gas. In this way, by arranging the storage unit 2 and the heat storage unit 3 alternately in a predetermined direction, the hydrogen storage and supply device 1A can efficiently store and supply hydrogen gas.

[0025] Each of the storage unit 2 and the heat storage unit 3 has a plate shape, so that heat is efficiently transferred between the storage unit 2 and the heat storage unit 3.

[0026] The storage unit 2 and the heat storage unit 3 are arranged so as to be in contact with each other, so that heat is efficiently exchanged between the storage unit 2 and the heat storage unit 3.

[0027] At least one hydrogen gas line 4 is connected to each of the plurality of storage units 2. As a result, when storing hydrogen gas, hydrogen gas is efficiently supplied to each of the plurality of storage units 2. When releasing hydrogen gas, hydrogen gas is efficiently released from each of the plurality of storage units 2.

[0028] At least one working medium line 5 is connected to each of the plurality of heat storage units 3. As a result, when heat is provided from the storage unit 2 to the heat storage unit 3, working medium vapor is efficiently released from each of the plurality of heat storage units 3. When heat is provided from the heat storage unit 3 to the storage unit 2, working medium vapor is efficiently supplied to each of the plurality of heat storage units 3.

[0029] [Second embodiment] A second embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiment will be denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0030] FIG. 2 is a diagram schematically illustrating a hydrogen storage and supply device 1B according to this embodiment. In this embodiment, the storage unit 20 includes a pair of storage units 2 (storage materials) as described in the first embodiment above, and a cooler 6 disposed between the pair of storage units 2. The cooler 6 cools the storage units 2. The cooler 6 is plate-shaped. The cooler 6 is disposed so as to be sandwiched between the pair of storage units 2. The storage units 2 and the cooler 6 are disposed so as to be in contact with each other.

[0031] In this embodiment, the cooler 6 is a plate-shaped container capable of accommodating a refrigerant. The refrigerant is supplied to the cooler 6 from a cold source 8 via a cold line 9. An example of the refrigerant is water. By supplying the refrigerant into the cooler 6, the cooler 6 can cool the storage unit 2.

[0032] In this embodiment, the heat storage unit 30 includes a pair of heat storage units 3 (heat storage materials) described in the first embodiment above, and a heater 7 arranged between the pair of heat storage units 3. The heater 7 heats the heat storage units 3. The heater 7 is plate-shaped. The heater 7 is arranged so as to be sandwiched between the pair of heat storage units 3. The heat storage units 3 and the heater 7 are arranged so as to be in contact with each other.

[0033] In this embodiment, the heater 7 is a metal plate. Heat is supplied to the heater 7 from a heat source 10 via a heating line 11. The heat source 10 is a heater device. The supply of heat from the heat source 10 to the heater 7 enables the heater 7 to heat the heat storage section 3.

[0034] The storage units 20 and the heat storage units 30 are arranged alternately in the left-right direction. The storage units 20 and the heat storage units 30 are arranged so as to be in contact with each other. As in the first embodiment described above, a hydrogen gas line 4 is connected to each of the multiple storage units 2. A working medium line 5 is connected to each of the multiple heat storage units 3.

[0035] In this embodiment, the hydrogen storage and supply device 1B includes a temperature sensor 12 that detects the temperature of the storage unit 2 (storage material), and a controller 13. The controller 13 controls the cold heat source 8 and the heat source 10. When storing hydrogen gas, the controller 13 controls the cold heat source 8 so that the cooler 6 cools the storage unit 2. When releasing hydrogen gas, the controller 13 controls the heat source 10 so that the heater 7 heats the storage unit 2 via the heat storage unit 3.

[0036] The lower the temperature of the storage material, the more hydrogen gas the storage unit 2 can store. Therefore, when storing hydrogen gas, the storage unit 2 is cooled by the cooler 6, and the storage material of the storage unit 2 can efficiently store a large amount of hydrogen gas supplied from the hydrogen gas line 4. However, if the storage unit 2 becomes too cold, it may become difficult for the heat storage unit 3 to store heat. In this embodiment, the controller 13 starts cooling the storage unit 2 by the cooler 6 when it determines, based on the detection data of the temperature sensor 12, that the temperature of the storage unit 2 has reached or exceeded a predetermined first threshold. When the temperature of the storage unit 2 is low, cooling by the cooler 6 is not performed, and the heat storage unit 3 can store heat from the storage unit 2.

[0037] The higher the temperature of the storage material, the more hydrogen gas the storage unit 2 can release. Therefore, when releasing hydrogen gas, the storage unit 2 is heated by the heater 7 via the heat storage unit 3, and the storage material in the storage unit 2 can release a large amount of hydrogen gas to the hydrogen gas line 4. However, if the heat storage unit 3 is heated too much, it may become difficult for the heat storage unit 3 to release heat. In this embodiment, when the controller 13 determines, based on the detection data of the temperature sensor 12, that the temperature of the storage unit 2 has become equal to or lower than a predetermined second threshold, the controller 13 starts heating the heat storage unit 3 and the storage unit 2 by the heater 7. When the temperatures of the heat storage unit 3 and the storage unit 2 are high, heating by the heater 7 is not performed, and the heat storage unit 3 can provide heat to the storage unit 2.

[0038] Next, the operation of the hydrogen storage and supply device 1B will be described. When hydrogen gas is stored in the storage unit 2, the hydrogen gas to be stored in the storage unit 2 is supplied to the storage unit 2 via the hydrogen gas line 4. The storage unit 2, to which hydrogen gas is supplied, releases heat when it absorbs the hydrogen gas. The heat storage unit 3 stores the heat released from the storage unit 2 during the absorption of hydrogen gas. The heat storage unit 3 desorbs the working medium when storing the heat released from the storage unit 2. The working medium vapor desorbed from the heat storage unit 3 is discharged via the working medium line 5. When the controller 13 determines, based on the detection data of the temperature sensor 12, that the temperature of the storage unit 2 has reached or exceeded a predetermined first threshold, the controller 13 starts cooling the storage unit 2 using the cooler 6. Cooling the storage unit 2 using the cooler 6 allows the storage unit 2 to efficiently absorb hydrogen gas.

[0039] When hydrogen gas stored in storage unit 2 is to be released from storage unit 2, vapor of the working medium to be coupled to heat storage unit 3 is supplied to heat storage unit 3 via working medium line 5. When vapor of the working medium is supplied to heat storage unit 3 and heat storage unit 3 and the working medium are coupled, the heat stored in heat storage unit 3 is released from heat storage unit 3. The heat released from heat storage unit 3 is provided to storage unit 2. Heat storage unit 3 provides storage unit 2 with the heat necessary to release the hydrogen gas. Storage unit 2 releases the stored hydrogen gas by receiving heat from heat storage unit 3. The hydrogen gas released from storage unit 2 is discharged via hydrogen gas line 4. When controller 13 determines, based on the detection data of temperature sensor 12, that the temperature of storage unit 2 has become equal to or lower than a predetermined second threshold, controller 13 starts heating storage unit 2 with heater 7. Even if the heat stored in the heat storage section 3 is sufficiently released and the heat storage section 3 can no longer provide heat to the storage section 2, the heater 7 can further heat the storage section 2, allowing the storage section 2 to efficiently release hydrogen gas.

[0040] [Third embodiment] A third embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description of these components will be simplified or omitted.

[0041] FIG. 3 is a diagram schematically showing a hydrogen storage and supply device 1C according to this embodiment. The hydrogen storage and supply device 1C comprises a storage section 2 containing a storage material capable of absorbing and releasing hydrogen gas, and a heat storage section 3 containing a heat storage material that stores heat released from the storage section 2 during the absorption of hydrogen gas and provides the storage section 2 with the heat necessary for releasing the hydrogen gas. The storage section 2 is rod-shaped. The storage section 2 is arranged so as to extend in the vertical direction. A plurality of storage sections 2 are provided. The plurality of storage sections 2 are arranged parallel to one another. The heat storage section 3 is arranged around each of the plurality of storage sections 2. The storage section 2 and the heat storage section 3 are arranged so as to be in contact with each other.

[0042] The hydrogen storage and supply device 1C includes a hydrogen gas line 4 through which hydrogen gas to be stored in the storage unit 2 and hydrogen gas released from the storage unit 2 flow. The hydrogen gas line 4 is connected to each of the multiple storage units 2.

[0043] The hydrogen storage and supply device 1C includes a working medium line 5 through which the working medium desorbed from the heat storage unit 3 and the working medium to be coupled to the heat storage unit 3 flow. The working medium line 5 is connected to the heat storage unit 3. The heat storage unit 3 desorbs the working medium when storing the heat released from the storage unit 2, and provides the storage unit 2 with the heat required to release hydrogen gas by coupling with the working medium.

[0044] As described above, the hydrogen storage and supply device 1C may be of the so-called shell and tube type. [Explanation of symbols]

[0045] 1A...hydrogen storage and supply device, 1B...hydrogen storage and supply device, 1C...hydrogen storage and supply device, 2...storage section, 3...heat storage section, 4...hydrogen gas line, 5...working medium line, 6...cooler, 7...heater, 8...cold heat source, 9...cold heat line, 10...heat source, 11...heating line, 12...temperature sensor, 13...controller, 20...storage section, 30...heat storage section.

Claims

1. a storage section including a storage material capable of absorbing and releasing hydrogen gas; a heat storage section including a heat storage material that stores heat released from the storage section during the occlusion of the hydrogen gas and provides the storage section with heat necessary for releasing the hydrogen gas, a plurality of the storage units and a plurality of the heat storage units are provided; The storage units and the heat storage units are arranged alternately in a predetermined direction. Hydrogen storage and supply device.

2. Each of the storage unit and the heat storage unit is plate-shaped. The hydrogen storage and supply device according to claim 1 .

3. The storage unit and the heat storage unit are arranged to be in contact with each other. The hydrogen storage and supply device according to claim 2 .

4. The storage unit includes a pair of the storage materials and a cooler disposed between the pair of the storage materials. The hydrogen storage and supply device according to claim 3 .

5. The cooler cools the storage material during storage of the hydrogen gas. The hydrogen storage and supply device according to claim 4.

6. a temperature sensor for detecting the temperature of the storage material; The cooler starts cooling the storage material when it is determined that the temperature of the storage material has reached a first threshold value or higher based on the detection data of the temperature sensor. The hydrogen storage and supply device according to claim 5 .

7. The heat storage unit includes a pair of the heat storage materials and a heater disposed between the pair of the heat storage materials. The hydrogen storage and supply device according to claim 3 .

8. The heater heats the storage material through the heat storage material when the hydrogen gas is released. The hydrogen storage and supply device according to claim 7.

9. a temperature sensor for detecting the temperature of the storage material; the heater starts heating the storage material when it is determined based on the detection data of the temperature sensor that the temperature of the storage material has become equal to or lower than a second threshold value. The hydrogen storage and supply device according to claim 8.

10. a hydrogen gas line through which the hydrogen gas to be stored in the storage unit and the hydrogen gas released from the storage unit flow, At least one of the hydrogen gas lines is connected to each of the plurality of storage units. The hydrogen storage and supply device according to claim 1 .

11. the heat storage unit desorbs the working medium when storing the heat released from the storage unit, and provides the storage unit with heat necessary for releasing the hydrogen gas by combining with the working medium; a working medium line through which the working medium desorbed from the heat storage unit and the working medium to be coupled to the heat storage unit flow, At least one of the working medium lines is connected to each of the plurality of heat storage units. The hydrogen storage and supply device according to claim 1 .

12. a storage section including a storage material capable of absorbing and releasing hydrogen gas; a heat storage section including a heat storage material that stores heat released from the storage section during the occlusion of the hydrogen gas and provides the storage section with heat necessary for releasing the hydrogen gas, The storage unit is rod-shaped and arranged in parallel to each other; The heat storage unit is disposed around each of the plurality of storage units. Hydrogen storage and supply device.

13. The storage unit and the heat storage unit are arranged to be in contact with each other. The hydrogen storage and supply device according to claim 12.

14. a hydrogen gas line through which the hydrogen gas to be stored in the storage unit and the hydrogen gas released from the storage unit flow, The hydrogen gas line is connected to each of the plurality of storage units. The hydrogen storage and supply device according to claim 13.

15. the heat storage unit desorbs the working medium when storing the heat released from the storage unit, and provides the storage unit with heat necessary for releasing the hydrogen gas by combining with the working medium; a working medium line through which the working medium desorbed from the heat storage unit and the working medium to be coupled to the heat storage unit flow, The working medium line is connected to the heat storage unit. The hydrogen storage and supply device according to claim 13.

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