Hydrogen occlusion system and hydrogen energy system comprising hydrogen occlusion system

Abstract

To shorten a time required for switching between cooling and heating of a hydrogen occlusion alloy.SOLUTION: A hydrogen occlusion system 1 comprises: a first region 10A that houses a hydrogen occlusion alloy 40A for absorbing hydrogen; a second region 10B that houses a hydrogen occlusion alloy 40B for absorbing hydrogen; and a temperature control device that adjusts each temperature of the hydrogen occlusion alloys 40A, 40B housed in the first region 10A and the second region 10B. The first region 10A and the second region 10B are partitioned by a partition wall 11 that is at least partially heat-transferable.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a hydrogen storage system and a hydrogen energy system including the hydrogen storage system. [Background technology]

[0002] Patent document 1 discloses a hydrogen storage system including a plurality of hydrogen storage alloy containers in which hydrogen storage alloys are housed, a heat medium flow path through which a heat medium moves to transfer heat to the hydrogen storage alloy, and a temperature adjustment unit that adjusts the temperature of the heat medium moving in the heat medium flow path. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-35479 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the invention described in Patent Document 1, when heating the hydrogen storage alloy, the water (heat medium) in the water tank is heated by a heater, and the hydrogen storage alloy is heated by the heated water. Also, in the invention described in Patent Document 1, when cooling the hydrogen storage alloy, the water (heat medium) in the water tank is cooled, and the hydrogen storage alloy is cooled by the cooled water.

[0005] As described above, in the invention described in Patent Document 1, heat is exchanged between the hydrogen storage alloy and the outside when the hydrogen storage alloy is cooled and heated, resulting in a waste of thermal energy.

[0006] An object of the present invention is to effectively utilize the thermal energy generated when hydrogen is absorbed or desorbed by a hydrogen storage alloy. [Means for solving the problem]

[0007] The present invention is a hydrogen storage system comprising a first region that accommodates a hydrogen storage alloy that absorbs hydrogen, a second region that accommodates a hydrogen storage alloy that absorbs hydrogen, and a temperature adjustment device that adjusts the temperature of the hydrogen storage alloy accommodated in the first region and the second region, wherein the first region and the second region are partitioned by a heat transfer portion that is capable of transferring heat at least in part. Effect of the Invention

[0008] The thermal energy generated when hydrogen is absorbed or desorbed by the hydrogen storage alloy can be effectively utilized. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic diagram of a hydrogen energy system to which a hydrogen storage system according to an embodiment of the present invention is applied. [Diagram 2] FIG. 2 is a schematic diagram of a hydrogen storage system according to an embodiment of the present invention. [Diagram 3] FIG. 3 is a characteristic diagram showing the relationship between the amount of hydrogen stored in the hydrogen storage alloy according to the embodiment of the present invention and the pressure inside the hydrogen storage tank. [Figure 4] FIG. 4 is a diagram showing a modified example of the hydrogen storage tank. [Diagram 5] FIG. 5 is a diagram showing a modified example of the hydrogen storage tank. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0011] The hydrogen absorption system 1 is installed in buildings, mobility, etc. that use hydrogen gas as fuel, and absorbs or releases hydrogen gas. First, with reference to Fig. 1, a hydrogen energy system 100 to which the hydrogen absorption system 1 according to the embodiment of the present invention is applied will be briefly described.

[0012] As shown in FIG. 1, a hydrogen energy system 100 includes a hydrogen absorption system 1, a hydrogen generation device 2 that supplies hydrogen to the hydrogen absorption system 1, and a hydrogen utilization device 3 that utilizes hydrogen released from the hydrogen absorption system 1.

[0013] The hydrogen generation device 2 generates hydrogen by electrolyzing water. The hydrogen generation device 2 includes a temperature regulator (not shown) that regulates the temperature of the generated hydrogen, and a pressure regulator (not shown) that regulates the pressure of the generated hydrogen.

[0014] The hydrogen utilization device 3 is an energy generation source that produces energy through a chemical reaction of hydrogen released from the hydrogen storage system 1. Specifically, the energy generation source is a fuel cell or a hydrogen engine. A fuel cell produces electric energy by reacting hydrogen released from the hydrogen storage system 1 with oxygen, and a hydrogen engine produces rotational energy by combusting the hydrogen released from the hydrogen storage system 1. The fuel cell and the hydrogen engine emit heat and water or water vapor.

[0015] The hydrogen generation device 2 and the hydrogen utilization device 3 are connected by a flow path 4. The flow path 4 has a flow path 4A and a flow path 4B provided in parallel along the way. A communication passage 5A that communicates with a first region 10A of a hydrogen storage tank 10 (described later) is connected to the flow path 4A. A communication passage 5B that communicates with a second region 10B of the hydrogen storage tank 10 (described later) is connected to the flow path 4B.

[0016] An on-off valve 6A is provided upstream of the connection point with the communicating passage 5A in the flow path 4A, and an on-off valve 7A is provided downstream of the connection point with the communicating passage 5A in the flow path 4A. An on-off valve 6B is provided upstream of the connection point with the communicating passage 5B in the flow path 4B, and an on-off valve 7B is provided downstream of the connection point with the communicating passage 5B in the flow path 4B. The on-off valves in the hydrogen energy system 100 are controlled to open and close by a controller 60.

[0017] The hydrogen energy system 100 further includes a bypass flow path 8 that bypasses the flow path 4A and the flow path 4B, i.e., the hydrogen absorption system 1. One end of the bypass flow path 8 is connected to the flow path 4 upstream of the branch point of the flow path 4A and the flow path 4B, and the other end is connected to the flow path 4 downstream of the junction point of the flow path 4A and the flow path 4B.

[0018] An on-off valve 9 is provided in the bypass passage 8. By opening the on-off valve 9, hydrogen supplied from the hydrogen generation device 2 can be supplied directly to the hydrogen utilization device 3, bypassing the hydrogen absorption system 1.

[0019] Next, a specific configuration of the hydrogen storage system 1 will be described with reference to FIG.

[0020] As shown in FIG. 2, the hydrogen storage system 1 includes a hydrogen storage tank 10 in which hydrogen storage alloys 40A, 40B are stored, a cooling device 20 (temperature adjustment device) for cooling the hydrogen storage alloys 40A, 40B in the hydrogen storage tank 10, a heating device 30 (temperature adjustment device) for heating the hydrogen storage alloys 40A, 40B in the hydrogen storage tank 10, a first circulation circuit 50A in which water circulates also as a heat medium to adjust the temperature of the hydrogen storage alloy 40A in the first region 10A, and a second circulation circuit 50B in which water circulates also as a heat medium to adjust the temperature of the hydrogen storage alloy 40B in the second region 10B.

[0021] The hydrogen storage tank 10 is divided into a first region 10A and a second region 10B. Specifically, the first region 10A and the second region 10B are divided by a partition wall 11 (heat transfer portion) within the hydrogen storage tank 10. The partition wall 11 is made of a material with good thermal conductivity. This allows the first region 10A and the second region 10B to transfer heat to each other via the partition wall 11.

[0022] The hydrogen storage tank 10 further has a first port 12A communicating with the first region 10A and a second port 12B communicating with the second region 10B. A communication passage 5A is connected to the first port 12A, and a communication passage 5B is connected to the second port 12B. The outer peripheral surface of the hydrogen storage tank 10 is covered with a heat insulating material (not shown).

[0023] The hydrogen storage alloys 40A, 40B housed in the hydrogen storage tank 10 are hydrogen storage alloys such as AB5 type, AB2 type, A2B type, solid solution type (BCC alloy), and the like.

[0024] The cooling device 20 dissipates heat of the water flowing through the first circulation circuit 50A and the second circulation circuit 50B to the outside. The cooling device 20 is configured by a cooling tower, a radiator, or the like.

[0025] The heating device 30 heats the water flowing through the first circulation circuit 50A and the second circulation circuit 50B. The heating device 30 is configured by a heater or the like. Note that instead of the heating device 30, or in combination with the heating device 30, exhaust heat generated in the hydrogen utilization device 3 may be utilized to heat the water flowing through the first circulation circuit 50A and the second circulation circuit 50B.

[0026] Next, the first circulation circuit 50A and the second circulation circuit 50B will be described. Since the first circulation circuit 50A and the second circulation circuit 50B have the same configuration, the following description will focus on the first circulation circuit 50A, and the second circulation circuit 50B will be omitted by assigning the same numerals to the configurations of the first circulation circuit 50A in the drawings. The configurations of the first circulation circuit 50A will be distinguished by adding "A" to the reference numeral, and the configurations of the second circulation circuit 50B will be distinguished by adding "B" to the reference numeral.

[0027] The first circulation circuit 50A includes a first heat exchanger 51A that exchanges heat with the hydrogen storage alloy 40A in the hydrogen storage tank 10, a second heat exchanger 52A that exchanges heat with the cooling device 20, a third heat exchanger 53A that exchanges heat with the heating device 30, a pump 57A for circulating water in the first circulation circuit 50A, and a connection part 54A that connects the first heat exchanger 51A with the second heat exchanger 52A and the third heat exchanger 53A. The second heat exchanger 52A and the third heat exchanger 53A are connected in parallel to ends of the connection part 54A.

[0028] An on-off valve 55A is provided on the second heat exchange section 52A, and an on-off valve 56A is provided on the third heat exchange section 53A.

[0029] Next, the cooling and heating of the hydrogen storage alloy 40A by the first circulation circuit 50A will be described.

[0030] When cooling the hydrogen storage alloy 40A, the on-off valve 55A is opened and the on-off valve 56A is closed. In this state, the pump 57A is driven, so that the water cooled by the cooling device 20 circulates through the second heat exchange section 52A, the connection section 54A, and the first heat exchange section 51A. This cools the hydrogen storage alloy 40A.

[0031] On the other hand, when the hydrogen storage alloy 40A is heated, the on-off valve 55A is closed and the on-off valve 56A is opened. By driving the pump 57A in this state, the water heated by the heating device 30 circulates through the third heat exchange section 53A, the connection section 54A and the first heat exchange section 51A. This heats the hydrogen storage alloy 40A.

[0032] Next, the adsorption and desorption of hydrogen in the hydrogen storage alloys 40A, 40B will be described with reference to Figs. 1 to 3. Fig. 3 is a graph showing the relationship between the pressure, temperature, and amount of absorbed hydrogen of the hydrogen storage alloy (hydrogen storage tank 10). The solid line in Fig. 3 shows the characteristics during adsorption, and the dotted line shows the characteristics during desorption. Note that the methods of adsorption and desorption of the hydrogen storage alloys 40A, 40B in the first region 10A and the second region 10B are the same, so the following describes only the adsorption and desorption of the hydrogen storage alloy 40A in the first region 10A, and omits a description of the second region 10B.

[0033] First, the adsorption of hydrogen into the hydrogen storage alloy 40A will be described.

[0034] By opening the on-off valve 6A, hydrogen generated by the hydrogen generation device 2 is guided through the flow path 4, the flow path 4A, and the communication passage 5A into the first region 10A of the hydrogen storage tank 10 (see FIG. 1). At this time, the on-off valve 7A is in a closed state.

[0035] In this embodiment, the pressure of hydrogen supplied from the hydrogen generation device 2 is about 0.8 MPa. The hydrogen introduced into the first region 10A of the hydrogen storage tank 10 is adsorbed by the hydrogen storage alloy 40A. When the hydrogen storage alloy 40A adsorbs hydrogen, the temperature of the hydrogen storage alloy 40A rises due to an exothermic reaction.

[0036] 3, the hydrogen storage alloy 40A absorbs less hydrogen as the temperature increases at the same pressure. For this reason, in this embodiment, during adsorption, the cooling device 20 is driven and the pump 57A is driven to circulate the water in the first circulation circuit 50A.

[0037] The water discharged from the pump 57A cools the hydrogen storage alloy 40A in the first heat exchange section 51A. The water (which has passed through the first heat exchange section 51A) whose temperature has increased by heat exchange with the hydrogen storage alloy 40A is guided to the cooling device 20 through the connection section 54A and the second heat exchange section 52A (see FIG. 2). In the cooling device 20, the heat of the water passing through is removed, and the temperature of the water decreases. The water cooled by the cooling device 20 is guided to the pump 57A and discharged from the pump 57A again. By circulating the water in the first circulation circuit 50A in this manner, the heat generated by the hydrogen storage alloy 40A can be released to the outside.

[0038] In addition, in the hydrogen absorption system 1 of this embodiment, as described above, the partition wall 11 that separates the first region 10A and the second region 10B is made of a material with good thermal conductivity, so that the first region 10A and the second region 10B can transfer heat. Therefore, when heat is generated in the first region 10A, a temperature difference occurs between the first region 10A and the second region 10B, and the heat is transferred to the second region 10B, which is the lower temperature side. That is, in the hydrogen absorption system 1 of this embodiment, the heat generated in the first region 10A can be absorbed by the second region 10B. In this way, by absorbing the heat generated in the first region 10A in the second region 10B, it is not necessary to perform cooling by the cooling device 20 by the amount of heat absorbed by the second region 10B, so that the amount of energy consumption can be reduced.

[0039] Adsorption by the hydrogen storage alloy 40A accommodated in the first region 10A is terminated by closing the on-off valve 6A.

[0040] Next, desorption of hydrogen from the hydrogen storage alloy 40A accommodated in the first region 10A of the hydrogen storage tank 10 will be described.

[0041] By opening the on-off valve 7A, the hydrogen absorbed by the hydrogen storage alloy 40A is guided to the hydrogen utilization device 3 through the communication passage 5A, the flow path 4B, and the flow path 4 (see FIG. 1). At this time, the on-off valve 6A is in a closed state.

[0042] When the hydrogen storage alloy 40A desorbs hydrogen, the temperature drops due to an endothermic reaction. As shown in Fig. 3, the hydrogen storage alloy 40A absorbs more at the same pressure as the temperature drops. For this reason, in this embodiment, when desorbing hydrogen, the heating device 30 is driven and the pump 57A of the first circulation circuit 50A is driven to circulate water.

[0043] The water discharged from the pump 57A heats the hydrogen storage alloy 40A in the first heat exchange section 51A. The water (which has passed through the first heat exchange section 51A) whose temperature has been reduced by heat exchange with the hydrogen storage alloy 40A is guided to the heating device 30 through the connection section 54A and the third heat exchange section 53A. In the heating device 30, the passing water is heated, and the temperature of the water increases. The water heated by the heating device 30 is guided to the pump 57A and discharged again from the pump 57A. By circulating the water in the first circulation circuit 50A in this manner, the hydrogen storage alloy 40A can be heated.

[0044] In addition, in the hydrogen absorption system 1 of this embodiment, as described above, the partition wall 11 that separates the first region 10A and the second region 10B is made of a material with good thermal conductivity, so that heat can be transferred between the first region 10A and the second region 10B. Therefore, when the temperature of the first region 10A drops, a temperature difference occurs between the first region 10A and the second region 10B, and heat is supplied from the second region 10B to the first region 10A, which is the low-temperature side. By supplying heat from the second region 10B in this way when the temperature of the first region 10A drops, it is not necessary to perform heating by the heating device 30 by the amount of heat supplied from the second region 10B, so that the amount of energy consumption can be reduced.

[0045] In the hydrogen storage system 1 configured as above, for example, when hydrogen is adsorbed in the hydrogen storage alloy 40A in the first region 10A and then desorbed in the hydrogen storage alloy 40B in the second region 10B, the hydrogen storage alloy 40B in the second region 10B absorbs the heat generated when hydrogen is adsorbed in the first region 10A, and the temperature is increased in advance. This makes it possible to reduce the amount of energy consumed to heat the hydrogen storage alloy 40B by the heating device 30 when hydrogen is desorbed from the hydrogen storage alloy 40B in the second region 10B. In this way, in the hydrogen storage system 1, the heat generated when hydrogen is adsorbed by the hydrogen storage alloy 40A is used to heat the hydrogen storage alloy 40B rather than being dissipated to the outside, so that thermal energy can be effectively utilized.

[0046] Conversely, when the situation arises where hydrogen is to be adsorbed in the hydrogen storage alloy 40B in the second region 10B after hydrogen has been desorbed in the first region 10A, the temperature of the hydrogen storage alloy 40B in the second region 10B has already been lowered because heat is absorbed when hydrogen is desorbed in the first region 10A. This makes it possible to reduce the amount of energy consumed to cool the hydrogen storage alloy 40B by the cooling device 20 when hydrogen is adsorbed in the hydrogen storage alloy 40B in the second region 10B. In this way, in the hydrogen storage system 1, heat is absorbed from the hydrogen storage alloy 40B when hydrogen is desorbed by the hydrogen storage alloy 40A, and thermal energy can be used effectively.

[0047] Next, a specific example of how to use the hydrogen energy system 100 will be described.

[0048] For example, when hydrogen can be stably supplied from the hydrogen generation device 2 to the hydrogen utilization device 3, the on-off valve 9 is opened to bypass the hydrogen occlusion system 1 and supply hydrogen directly from the hydrogen generation device 2 to the hydrogen utilization device 3.

[0049] Furthermore, for example, when the hydrogen generation device 2 is driven by electricity generated by wind power, the amount of hydrogen that can be generated by the hydrogen generation device 2 may vary significantly depending on the amount of electricity generated by the wind power. In such a case, if hydrogen is supplied directly from the hydrogen generation device 2 to the hydrogen utilization device 3, it may not be possible to supply hydrogen stably.

[0050] However, in the hydrogen energy system 100, for example, hydrogen supplied from the hydrogen generation device 2 is absorbed by the hydrogen storage alloy 40A in the first region 10A, while hydrogen is desorbed from the hydrogen storage alloy 40B in the second region 10B, thereby supplying hydrogen to the hydrogen utilization device 3. In other words, since the hydrogen energy system 100 includes the hydrogen absorption system 1, even if the amount of hydrogen supplied from the hydrogen generation device 2 fluctuates, hydrogen can be stably supplied to the hydrogen utilization device 3. In other words, when the amount of hydrogen supplied from the hydrogen generation device 2 fluctuates greatly, the hydrogen absorption system 1 can function as a buffer that absorbs the fluctuations in the amount of hydrogen.

[0051] Furthermore, by alternately switching between absorbing and desorbing hydrogen storage alloys 40A, 40B, hydrogen can be supplied stably to the hydrogen utilization device 3 even in situations where the amount of hydrogen supplied from the hydrogen generation device 2 fluctuates over a long period of time.

[0052] Incidentally, hydrogen may be adsorbed and desorbed to the hydrogen storage alloys 40A and 40B simultaneously.

[0053] In the above embodiment, the first region 10A and the second region 10B in the hydrogen storage tank 10 are formed in a spiral shape, but the present invention is not limited to this, and the first region 10A and the second region 10B may be arranged alternately, for example, as shown in Fig. 4. Furthermore, the entire first region 10A may be accommodated inside the second region 10B, as shown in Fig. 5.

[0054] Furthermore, the shape of the hydrogen storage tank 10 is not limited to a multi-layered cylindrical shape, but may be a sphere, a polyhedron, or the like.

[0055] The hydrogen storage system 1 according to the above embodiment has the following advantages.

[0056] The inside of the hydrogen storage tank 10 is divided into a first region 10A and a second region 10B by a heat-transferable partition wall 11. This allows, for example, heat generated during hydrogen adsorption in the first region 10A (hydrogen storage alloy 40A) to be absorbed in the second region 10B (hydrogen storage alloy 40B) through the partition wall 11. This means that the first region 10A (hydrogen storage alloy 40A) does not need to be cooled by the cooling device 20 for the amount of heat absorbed in the second region 10B (hydrogen storage alloy 40B), and energy consumption can be reduced.

[0057] Furthermore, when hydrogen is desorbed from second region 10B (hydrogen storage alloy 40B) while second region 10B (hydrogen storage alloy 40B) has absorbed the heat generated in first region 10A (hydrogen storage alloy 40A), second region 10B (hydrogen storage alloy 40B) has already been heated, so there is no need to heat it by heating device 30 by the amount of absorbed heat, thereby reducing energy consumption.

[0058] In this manner, the hydrogen storage system 1 allows the heat generated when hydrogen is adsorbed on one side of the hydrogen storage alloys 40A, 40B to be absorbed by the other side of the hydrogen storage alloys 40A, 40B, thereby enabling efficient use of energy.

[0059] Furthermore, for example, when the temperature drops during desorption of hydrogen in the first region 10A (hydrogen storage alloy 40A), heat can be supplied from the second region 10B (hydrogen storage alloy 40B) through the partition wall 11. This eliminates the need to heat the first region 10A (hydrogen storage alloy 40A) by the heating device 30 by the amount of heat supplied from the second region 10B (hydrogen storage alloy 40B), thereby reducing energy consumption.

[0060] Furthermore, when hydrogen is adsorbed from second region 10B (hydrogen storage alloy 40B) while second region 10B (hydrogen storage alloy 40B) is supplying heat to first region 10A (hydrogen storage alloy 40A), second region 10B (hydrogen storage alloy 40B) has already been cooled, so there is no need for cooling by cooling device 20 for the amount of heat supplied, thereby reducing energy consumption.

[0061] In this manner, according to the hydrogen storage system 1, when hydrogen is desorbed from one side of the hydrogen storage alloys 40A, 40B, heat is supplied from the other side of the hydrogen storage alloys 40A, 40B, so that energy can be used efficiently.

[0062] Furthermore, in the hydrogen absorption system 1, hydrogen can be desorbed from the second region 10B while hydrogen is adsorbed in the first region 10A, and hydrogen can be desorbed from the first region 10A while hydrogen is adsorbed in the second region 10B, and these operations can be repeated alternately. Specifically, hydrogen supplied from the hydrogen generation device 2 can be absorbed in either the first region 10A or the second region 10B, and at the same time, hydrogen can be desorbed from the other of the first region 10A or the second region 10B and supplied to the hydrogen utilization device 3. This allows more effective use of thermal energy and further reduces energy consumption. Furthermore, even in cases where the amount of hydrogen supplied from the hydrogen generation device 2 fluctuates, hydrogen can be stably supplied to the hydrogen utilization device 3.

[0063] In addition, as shown in Fig. 4, when the first region 10A and the second region 10B are alternately arranged, the contact area between the first region 10A and the second region 10B can be increased. This increases the amount of heat that moves between the first region 10A and the second region 10B. This allows for more effective use of thermal energy and further reduces energy consumption.

[0064] Furthermore, as shown in FIG. 5, when the entire first region 10A is located inside the second region 10B, heat from the first region 10A moves only to the second region 20A, so that thermal energy can be utilized more effectively and energy consumption can be reduced.

[0065] Although the embodiments of the present invention have been described above, the above-mentioned embodiments merely show some of the application examples of the present invention, and it is not intended that the technical scope of the present invention be limited to the specific configurations of the above-mentioned embodiments.

[0066] In the above embodiment, the cooling device 20 and the heating device 30 are provided. However, the present invention is not limited to this. A temperature adjustment device having both a cooling function and a heating function may be used.

[0067] In the above embodiment, the hydrogen generation device 2 has been described as an electrolysis device that generates hydrogen by electrolyzing water. However, the hydrogen generation device 2 is not limited to a fixed device such as an electrolysis device, and may be a mobile device such as a hydrogen trailer. [Explanation of symbols]

[0068] 1. Hydrogen storage system 2. Hydrogen generation device 3. Hydrogen Utilization Equipment 10. Hydrogen storage tank 10A...1st area 10B...Second area 11... Partition (heat transfer section) 20...Cooling device (temperature adjustment device) 30... Heating device (temperature adjustment device) 40A Hydrogen storage alloy 40B: Hydrogen storage alloy 50A...1st circulation circuit 50B...Second circulation circuit 100 Hydrogen Energy System

Claims

1. a first region that accommodates a hydrogen storage alloy that stores hydrogen; a second region that accommodates a hydrogen storage alloy that stores hydrogen; a temperature adjusting device that adjusts the temperature of the hydrogen storage alloy accommodated in the first region and the second region, A hydrogen absorption system, wherein the first region and the second region are partitioned by a heat transfer portion capable of transferring heat at least in part.

2. 2. The hydrogen storage system according to claim 1, A hydrogen storage system wherein the first region is entirely contained within the second region.

3. 2. The hydrogen storage system according to claim 1, A hydrogen storage system in which the first regions and the second regions are arranged alternately.

4. 2. The hydrogen storage system according to claim 1, A hydrogen storage system in which the hydrogen storage alloy contained in one of the first region and the second region is heated through the heat transfer section by heat generated when the hydrogen storage alloy contained in the other of the first region and the second region is absorbed.

5. 2. The hydrogen storage system according to claim 1, A hydrogen absorption system that alternately repeats the process of adsorbing hydrogen in the first region while desorbing hydrogen from the second region, and of adsorbing hydrogen in the second region while desorbing hydrogen from the first region.

6. A hydrogen storage system according to any one of claims 1 to 5; a hydrogen generating device for supplying hydrogen to the hydrogen storage system; a hydrogen utilization device that utilizes hydrogen released from the hydrogen absorption system, The hydrogen supplied from the hydrogen generating device is stored in either the first region or the second region of the hydrogen storage system, and at the same time, A hydrogen energy system that desorbs hydrogen from the other of the first region or the second region of the hydrogen storage system and supplies the hydrogen to the hydrogen utilization device.

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