Heat storage tank

Abstract

To provide a heat storage tank capable of suppressing a reduction in the heat storage efficiency and the heat radiation efficiency while reducing the flow amount of air slipping out of a ceiling air region, a bottom air region, and a lateral air region.SOLUTION: The heat storage tank for storing heat from fluid into a heat storage material during heat storage operation and radiating the heat from the heat storage material into the fluid during heat radiation operation includes a heat storage material built-in tank which the heat storage material is built in. The heat storage tank further includes one or more gap flow path resistance object to be a resistance to a gap flow path in the heat storage material built-in tank. The heat storage tank also includes a cover part installed on the upper part of the heat storage material. In addition, the gap flow path resistance object changes a flow path for the fluid to pass through a gap inside the heat storage material built-in the tank during heat storage operation or heat radiation operation.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] An embodiment of the present invention relates to a thermal storage tank. [Background technology]

[0002] In recent years, power generation from natural energy sources such as solar power generation and wind power generation has increased, and there are regions where the amount of power generation exceeds the power demand depending on the season and time of day. Also, depending on the season and time of day, the power demand increases and exceeds the amount of power generation, resulting in a power shortage. Therefore, a first conventional technology that adjusts power by using heat storage will be described with reference to FIG. 29.

[0003] When there is surplus power, the heat storage power generation system 100 stops the condensate pump 8, the steam turbine 10, and the second fan 4, opens the valves 12 and 13, closes the valves 14 and 15, and operates the electric heater 2 and the first fan 3 using the surplus power. The heat storage system 100 circulates air 5 between the electric heater 2 and the heat storage tank 1 by the first fan 3. The air 5 is heated by the heat generated by the electric heater 2, transports the heat to the heat storage tank 1, and heats the heat storage material in the heat storage tank 1. In this manner, the heat storage power generation system 100 performs heat storage operation.

[0004] When there is no surplus power, the thermal storage power generation system 100 stops the electric heater 2 and the first fan 3, closes the valves 12 and 13, opens the valves 14 and 15, and operates the condensate pump 8 and the second fan 4. The thermal storage power generation system 100 circulates the air 5 between the thermal storage tank 1 and the boiler 9 by the second fan 4. The air 5 is heated by the thermal storage material in the thermal storage tank 1, and transports the heat to the boiler 9. The boiler 9 heats the water 6 brought in by the condensate pump 8 with the heat from the air 5, produces steam 7, and the air 5 flows out with its temperature reduced. In this manner, the thermal storage power generation system 100 performs a heat dissipation operation.

[0005] In the heat dissipation operation, the steam 7 produced by the heat storage power generation system 100 flows through the steam turbine 10 at low temperature and low pressure, thereby rotating and driving the steam turbine 10, which is an impeller. The heat storage system 100 generates electricity from a generator (not shown) mechanically connected to the steam turbine 10. The steam 7 discharged from the steam turbine 10 is cooled by the condenser 11 with cooling water such as seawater, and is changed into water 6. As a result, the heat storage power generation system 100 generates steam 7 using the heat stored in the heat storage material in the heat storage tank 1, and generates electricity.

[0006] As described above, the heat storage power generation system 100 adjusts power by using power for heat storage operation when there is a power surplus, and by generating power through heat dissipation operation when there is a power shortage. The heat storage power generation system 100 is configured to use the heat dissipated from the heat storage tank 1 as a heat source for the steam turbine 10, but the heat dissipated from the heat storage tank 1 may also be used for air conditioning or other purposes. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent Publication No. 2021-1597 Summary of the Invention [Problem to be solved by the invention]

[0008] As a second conventional technique, a cross section of a heat storage tank 1 is shown in Fig. 30. The heat storage material is a solid sensible heat storage material 16, such as rock. The heat storage tank 1 includes a heat storage material built-in tank 24 and a lid 17, and when the heat storage tank 1 is filled with rock, which is the solid sensible heat storage material 16 (hereinafter also simply referred to as the heat storage material), the lid 17 is closed.

[0009] When the lid 17 of the thermal storage tank 1 is closed, the underside of the lid 17 and the top of the rocks do not come into contact over the entire surface, so a gap is created at the top of the thermal storage material-containing tank 24. The gap at the top of the thermal storage material-containing tank 24 is called the ceiling air region 22. Furthermore, after sufficient time has passed in the thermal storage tank 1, the rocks become more clogged due to the rocks shifting downwards due to vibration or surface collapse, and the thermal storage material expanding and contracting due to repeated temperature fluctuations. As a result, the position of the rocks becomes lower overall, and the ceiling air region 22 expands.

[0010] During heat storage operation, air 5 flows into the heat storage tank 1, passes through the gaps between the rocks, and flows out of the heat storage tank 1. Here, the ceiling air region 22 has a sufficiently smaller ventilation resistance than the gaps between the rocks, so when the air 5 flows in, the flow rate of the air 23 passing through the ceiling air region 22 is large. For example, the air 23 does not contribute to heating the rocks during heat storage operation, so if this region is large, the heat storage efficiency is reduced. Similarly, during heat dissipation operation, the flow rate of the air 23 passing through the ceiling air region 22 is large, and the air 23 is not heated by the rocks during heat dissipation operation, so the heat dissipation efficiency is reduced.

[0011] In addition, the area between the bottom and sides of the thermal storage tank 1, which are flat surfaces, and the rocks is often larger than the area between the rocks. These areas are called the bottom air area and the side air area, respectively. If these air areas are large, the thermal storage efficiency and thermal dissipation efficiency will decrease as described above.

[0012] Therefore, an object of the present invention is to propose a heat storage tank 1 that can reduce the flow rate of the air 23 passing through the ceiling air region 22, the bottom air region, and the side air region, and suppress the decrease in the heat storage efficiency and the heat dissipation efficiency. [Means for solving the problem]

[0013] According to one embodiment, the heat storage tank stores heat from a fluid in a heat storage material during a heat storage operation and releases heat from the heat storage material to a fluid during a heat release operation, and includes a heat storage material-containing tank that contains the heat storage material. The heat storage tank further includes one or more gap flow path resistors that provide resistance to gap flow paths in the heat storage material-containing tank. The heat storage tank further includes a lid that is installed on top of the heat storage material. The gap flow path resistors change the flow path of the fluid that passes through the gaps inside the heat storage material-containing tank during a heat storage operation or a heat release operation. [Brief description of the drawings]

[0014] [Figure 1] FIG. 3 is a schematic diagram of a lid of the heat storage tank in the first embodiment. [Diagram 2] 5 is a diagram showing a lid of the heat storage tank in the first embodiment, viewed from a different angle. FIG. [Diagram 3] 5 is a diagram showing the lid portion in the first embodiment from another angle. FIG. [Figure 4] 13 is a schematic diagram of the vicinity of a lid of a heat storage tank in a second embodiment. FIG. [Diagram 5] 13 is a diagram showing a schematic view of a lid of a heat storage tank in a second embodiment, seen from a different angle. FIG. [Figure 6] 13 is a schematic diagram showing the lid portion in the second embodiment from another angle. FIG. [Figure 7] FIG. 11 is a schematic diagram of a lid of a heat storage tank in a third embodiment. [Figure 8] 13 is a diagram showing a lid of a heat storage tank in a third embodiment, viewed from a different angle. FIG. [Figure 9] 13 is a schematic diagram showing the lid portion in the third embodiment from another angle. FIG. [Figure 10] FIG. 13 is a schematic diagram of a lid of a heat storage tank in a fourth embodiment. [Figure 11] 13 is a diagram showing the vicinity of the lid of the heat storage tank in the fourth embodiment, viewed from a different angle. FIG. [Figure 12] FIG. 13 is a schematic view of the lid portion in the fourth embodiment, seen from another angle. [Figure 13] FIG. 13 is a diagram illustrating a modified example of the heat storage tank in the fourth embodiment. [Figure 14] FIG. 13 is a schematic diagram of a lid of a heat storage tank in a fifth embodiment. [Figure 15] 13 is a diagram showing the vicinity of the lid of the heat storage tank in the fifth embodiment, viewed from a different angle. FIG. [Figure 16] FIG. 13 is a schematic view of the lid portion in the fifth embodiment, seen from another angle. [Figure 17] FIG. 13 is a diagram showing a schematic view of a lid of a heat storage tank in a sixth embodiment. [Figure 18] 13 is a diagram showing a lid of a heat storage tank in the sixth embodiment, viewed from a different angle. FIG. [Figure 19] FIG. 13 is a diagram illustrating a modified example of the heat storage tank in the sixth embodiment. [Figure 20] FIG. 13 is a diagram illustrating a schematic view of a lid of a heat storage tank in a seventh embodiment. [Figure 21] FIG. 23 is a diagram showing a schematic view of a lid of a heat storage tank in an eighth embodiment. [Figure 22] FIG. 13 is a diagram illustrating a heat storage tank according to a ninth embodiment. [Diagram 23] FIG. 23 is a diagram showing a schematic view of the vicinity of a lid of a heat storage tank in a tenth embodiment. [Figure 24] FIG. 23 is a diagram showing a schematic view of the vicinity of a lid in an eleventh embodiment. [Diagram 25] FIG. 23 is a diagram showing a schematic view of the vicinity of a lid in a twelfth embodiment. [Figure 26] FIG. 23 is a schematic diagram showing the state near the lid in the thirteenth embodiment. [Figure 27] FIG. 23 is a schematic diagram showing the state near the lid in the fourteenth embodiment. [Figure 28] FIG. 23 is a diagram showing a schematic diagram of a heat storage tank in a fifteenth embodiment. [Figure 29] FIG. 1 is an overall configuration diagram of a heat storage system according to a first prior art. [Diagram 30] FIG. 11 is a cross-sectional view of a heat storage tank in a heat storage system of a second prior art. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. The present embodiment does not limit the present invention. The drawings are schematic or conceptual, and the ratio of each part is not necessarily the same as the actual one. In the specification and drawings, elements similar to those described above with respect to the previous drawings are given the same reference numerals, and detailed descriptions are omitted as appropriate.

[0016] (First embodiment) FIG. 1 is a schematic diagram of a lid of a heat storage tank in the first embodiment.

[0017] The overall configuration of the heat storage system 100 is the same as that of Fig. 25, and therefore a description thereof will be omitted. The configuration of the heat storage tank 1 is the same as that of Fig. 26, in which solid sensible heat storage material 16 is built into the heat storage material built-in tank 24, and a lid 17 is installed on the top thereof.

[0018] Figure 1 shows the X-axis, Y-axis, and Z-axis, which are perpendicular to each other. The X-axis and Y-axis correspond to the horizontal direction perpendicular to the direction of gravity, and the Z-axis corresponds to the vertical direction parallel to the direction of gravity. The +Z direction corresponds to the upward direction, and the -Z direction corresponds to the downward direction.

[0019] In the following embodiment, air 5 flows only in the ±X direction during heat storage operation and heat dissipation operation, but air 5 in heat storage tank 1 may flow not only in the ±X direction but also in the ±Y direction or ±Z direction as long as it flows mainly in the ±X direction. For example, air 5 may have a Y-direction velocity component and a Z-direction velocity component in solid sensible heat storage material 16 in heat storage tank 1, as long as it has a sufficient X-direction velocity component. Flow of air 5 in such a manner is also included in the flow of air 5 in the X direction. Moreover, air 5 is an example of a fluid. The ceiling air region is an example of a ceiling fluid region.

[0020] Furthermore, the direction perpendicular to the horizontal flow direction of air 5 does not have to strictly coincide with the Y direction. For example, even if there is a Y-direction velocity component or a Z-direction velocity component in solid sensible heat storage material 16 in heat storage tank 1, a direction perpendicular to air 5 that has a sufficient X-direction velocity component is included as a direction perpendicular to the horizontal flow direction of air 5.

[0021] In this embodiment, the lid portion 17 is provided with a plurality of flexible plate-like members 18 extending downward in the Z direction from its lower surface. The flexible plate-like members 18 are an example of a first plate-like member. The material of the plate-like members 18 is, for example, a metal capable of withstanding the high-temperature air 5 during heat dissipation operation or heat storage operation. In FIG. 1, each plate-like member 18 is shown bent in the horizontal direction to explain the flexibility, but it is not necessary for the plate-like members 18 to be bent. In addition, the dimension of the plate-like members 18 in the Z direction is desirably long enough to contact the solid sensible heat storage material 16 in the heat storage material built-in tank 24. The flexible plate-like members 18 are an example of a gap flow path resistor.

[0022] Moreover, in the horizontal direction, the dimension of the plate member 18 in a direction perpendicular to the flow direction of the air 5 (that is, the Y direction in this example) preferably extends from one end of the heat storage material built-in tank 24 to the other end.

[0023] Furthermore, it is sufficient that one or more plate-like members 18 are provided on lid portion 17, but it is preferable to provide a plurality of plate-like members 18. In this example, five plate-like members 18 are provided, and are designated 18a to 18e.

[0024] FIG. 2 is a diagram showing a schematic view of the lid of the heat storage tank in the first embodiment from a different angle.

[0025] Fig. 2 is a view of the lid 17 in Fig. 1 as viewed from the -Y direction. Fig. 2 also illustrates four solid sensible heat storage materials 16a to 16d out of the solid sensible heat storage materials 16 built into the heat storage material built-in tank 24. Also, an example is shown in which air 5 flows in the ±X directions.

[0026] When the plate-shaped member 18 is moved in the -Z direction to close the lid portion 17, it comes into contact with the solid sensible heat storage material 16 located directly below and bends. Not all of the plate-shaped member 18 comes into contact with the solid sensible heat storage material 16 located directly below, but only a part of the plate-shaped member 18 may come into contact with the solid sensible heat storage material 16 located directly below, or it may not come into contact at all. Even when only a part of the plate-shaped member 18 comes into contact with the solid sensible heat storage material 16 or when it does not come into contact at all, the plate-shaped member 18 acts as a resistor for the passing air 23 and changes the flow path during heat storage operation and heat dissipation operation to guide the air to the solid sensible heat storage material 16.

[0027] In this example, the plate-shaped member 18a contacts the solid sensible heat storage material 16a, the plate-shaped member 18c contacts the solid sensible heat storage material 16c, and the plate-shaped member 18d contacts the solid sensible heat storage material 16d. There may be a plate-shaped member 18 that does not contact the solid sensible heat storage material 16.

[0028] Thereby, the plate-like member 18 becomes a resistor for the air 23 passing through the upper part of the heat storage tank 1 during the heat storage operation and the heat dissipation operation, and changes the flow path. As a result, the amount of air 23 passing through the heat storage tank 1 is reduced, and the air 5 that flows in contacts the solid sensible heat storage material 16, so that the decrease in the heat storage efficiency and the heat dissipation efficiency is suppressed.

[0029] FIG. 3 is a schematic view showing the lid portion in the first embodiment from another angle.

[0030] Fig. 3 shows a cross-sectional view taken along line AA' in Fig. 2, in which the cover 17 is viewed from the -X direction. As shown in Fig. 3, the plate-shaped member 18d is in contact with the solid sensible heat storage material 16d and is bent. In addition, although this figure shows an example in which the plate-shaped member 18d is bent in the +X direction, it may be bent in the -X direction.

[0031] Here, explanation will be given again with reference to Fig. 2. By repeating the heat storage operation and heat dissipation operation, even if the ceiling air region 22 is small at first, the solid sensible heat storage material 16 inside the heat storage tank 1 expands and contracts due to temperature changes, the clogging improves somewhat, and the ceiling air region 22 expands over time. Moreover, after a sufficient amount of time has passed, the solid sensible heat storage material 16 inside the heat storage material built-in tank 24 collapses, causing the ceiling air region 22 to expand.

[0032] However, since the plate-like member 18 in this embodiment has flexibility, the amount of bending is only small even if the ceiling air space 22 expands. Even after a sufficient amount of time has passed, the plate-like member 18 has the role of changing the flow path of the passing air 23.

[0033] In addition, in this embodiment, the plate-like member 18 is disposed in a direction perpendicular to the flow direction of the air 5, but it is not necessarily required to dispose it in this direction. For example, if the plate-like member 18 is disposed at an angle to the flow direction of the air 5 so as to obstruct the flow of the air 5, it will become a resistance to the passing air 23.

[0034] Furthermore, the plate-like member 18 may be arranged in a direction parallel to the flow direction of the air 5. By arranging the plate-like member 18 in a direction parallel to the flow direction of the air 5, it is possible to prevent the passing air 23 in the ceiling air region 22 from circulating to the side when the heat storage tank 1 is stored for a long period of time from the end of the heat storage operation to the start of the heat dissipation operation. As a result, the plate-like member 18 suppresses the natural convection of the air 5 present in the gaps between the solid sensible heat storage material 16, and it is possible to suppress the temperature distribution in the heat storage tank 1 from becoming higher toward the top and to suppress heat leakage to the outside world.

[0035] According to this embodiment, by providing the plate-like member 18 on the lid 17 of the heat storage tank 1, the plate-like member 18 becomes a resistor for the passing air 23 that passes through the ceiling air region 22 during heat storage operation and heat dissipation operation. As a result, the heat storage tank 1 can reduce the flow path cross-sectional area of ​​the ceiling air region 22, as well as change the flow path of the passing air 23 and guide it to the solid sensible heat storage material 16. In addition, the plate-like member 18 lengthens the route through which the passing air 23 flows, preventing it from flowing to the ceiling air region 22. As a result, the passing air 23 is reduced, and a decrease in the heat storage efficiency and heat dissipation efficiency is suppressed.

[0036] Furthermore, according to this embodiment, the lid portion 17 is provided with a flexible plate-like member 18, so that even if the position of the solid sensible heat storage material 16 inside the heat storage tank 1 is lowered and the ceiling air area 22 is expanded, the amount of bending of the plate-like member 18 is reduced, and the amount of passing air 23 can be reduced.

[0037] Second embodiment FIG. 4 is a schematic diagram of a lid of a heat storage tank in the second embodiment.

[0038] In this embodiment, the lid portion 17 is provided with a plurality of flexible rod-shaped members 19 extending downward in the Z direction from its underside. The material of the rod-shaped members 19 is, for example, a metal capable of withstanding the high-temperature air 5 during heat dissipation operation or heat storage operation. The dimension of the rod-shaped members 19 in the Z direction is desirably long enough to contact the solid sensible heat storage material 16 in the heat storage material built-in tank 24. The plate-shaped members 18 are an example of a gap flow path resistor. The rod-shaped members 19 do not necessarily have to have a rod-like shape, and may have a plate-like shape with the longitudinal direction on the lower side in the Z direction.

[0039] Moreover, in the horizontal direction, the dimension of the plate member 18 in a direction perpendicular to the flow direction of the air 5 (that is, the Y direction in this example) preferably extends from one end of the heat storage material built-in tank 24 to the other end.

[0040] In this embodiment, the lid portion 17 has a plurality of rod-shaped members 19 arranged in a row to form a bundle, and a plurality of bundles of the rod-shaped members 19 arranged in a row are provided in the horizontal direction. The bundle of rod-shaped members 19 may be one or more, but it is preferable to provide a plurality of bundles. In this example, five bundles of rod-shaped members 19 are provided, and are designated as 19a to 19e. The plurality of rod-shaped members 19 do not necessarily need to form a bundle in a row, and may be provided, for example, on a part or the entire surface of the lower surface of the lid portion 17. The state in which the plurality of rod-shaped members 19 are provided on the lid portion 17 includes a state in which the plurality of rod-shaped members 19 are provided in a bundle in a direction perpendicular to the flow direction of the air 5 as shown in FIG. 4, as well as a case in which the rod-shaped members 19 are provided on a part or the entire surface of the lid portion 17.

[0041] FIG. 5 is a diagram showing a schematic view of the lid of the heat storage tank in the second embodiment from a different angle.

[0042] Fig. 5 is a view of the lid portion 17 in Fig. 4 as viewed from the -Y direction. Fig. 2 also illustrates four solid sensible heat storage materials 16a to 16d out of the solid sensible heat storage materials 16 built into the heat storage material built-in tank 24.

[0043] When the plate-shaped member 18 is moved in the -Z direction to close the lid portion 17, it comes into contact with the solid sensible heat storage material 16 located directly below and bends. Not all of the rod-shaped members 19 come into contact with the solid sensible heat storage material 16 located directly below, but only a part of the rod-shaped members 19 may come into contact with the solid sensible heat storage material 16, or it may not come into contact at all. When the rod-shaped members 19 come into contact with the solid sensible heat storage material 16, they bend in all directions. Even when only a part of the plate-shaped member 18 comes into contact with the solid sensible heat storage material 16 or when there is no contact at all, the plate-shaped member 18 acts as a resistor for the passing air 23, and changes the flow path during heat storage operation and heat dissipation operation to guide the air to the solid sensible heat storage material 16.

[0044] In this example, rod-shaped member 19a contacts solid sensible heat storage material 16a, rod-shaped member 19c contacts solid sensible heat storage material 16c, and rod-shaped member 19d contacts solid sensible heat storage material 16d.

[0045] In the first embodiment, when the plate-shaped member 18 comes into contact with the solid sensible heat storage material 16, the entire contact surface bends, whereas in the present embodiment, only the rod-shaped member 19 in the bundle of rod-shaped members 19 that is in contact with the solid sensible heat storage material 16 bends.

[0046] FIG. 6 is a schematic view showing the lid portion in the second embodiment from another angle.

[0047] Fig. 6 shows a BB' cross-sectional view of Fig. 5, and is a view of lid portion 17 viewed from the +X direction. Fig. 6 shows that rod-shaped members 19a, 19c, and 19d are in contact with solid sensible heat storage materials 16a, 16c, and 19d, respectively, and are bent in all directions.

[0048] In the present embodiment, even if sufficient time has passed and the ceiling air region 22 has expanded, the amount of bending of the rod-shaped member 19 in contact with the solid sensible heat storage material 16 is merely reduced. Even if sufficient time has passed, the rod-shaped member 19 still has the role of changing the flow path of the passing air 23.

[0049] In addition, in this embodiment, the rod-shaped members 19 are arranged in a direction perpendicular to the flow direction of the air 5, but they do not necessarily have to be arranged in this direction. For example, if the rod-shaped members 19 are arranged at an angle to the flow direction of the air 5 so as to obstruct the flow of the air 5, they will act as a resistance to the passing air 23.

[0050] Moreover, the rod-shaped members 19 may be arranged in a direction parallel to the flow direction of the air 5. By arranging the rod-shaped members 19 in a direction parallel to the flow direction of the air 5, it is possible to prevent the passing air 23 in the ceiling air region 22 from flowing to the side when the heat storage tank 1 is stored for a long period of time from the end of the heat storage operation to the start of the heat dissipation operation. As a result, the rod-shaped members 19 suppress the natural convection of the air 5 present in the gaps between the solid sensible heat storage materials 16, and it is possible to suppress the temperature distribution in the heat storage tank 1 from becoming higher toward the top and to suppress heat leakage to the outside world.

[0051] According to this embodiment, by providing the rod-shaped member 19 on the lid 17 of the heat storage tank 1, the rod-shaped member 19 becomes a resistor for the passing air 23 that passes through the ceiling air region 22 during heat storage operation and heat dissipation operation. As a result, the heat storage tank 1 can not only reduce the flow path cross-sectional area, but also change the flow path of the passing air 23 and guide it to the solid sensible heat storage material 16. In addition, the rod-shaped member 19 lengthens the route through which the passing air 23 flows, preventing it from flowing to the ceiling air region 22. As a result, the passing air 23 is reduced, and a decrease in the heat storage efficiency and heat dissipation efficiency is suppressed.

[0052] Furthermore, according to this embodiment, by providing the rod-shaped member 19 on the lid 17 of the heat storage tank 1, the flow path cross-sectional area of ​​the ceiling air region 22 can be further reduced compared to the case where the plate-shaped member 18 is provided.

[0053] Furthermore, according to this embodiment, the lid portion 17 is provided with a flexible rod-shaped member 19, so that even if the position of the solid sensible heat storage material 16 inside the heat storage tank 1 is lowered and the ceiling air area 22 is expanded, the amount of bending of the rod-shaped member 19 is reduced, and the amount of passing air 23 can be reduced.

[0054] Third embodiment FIG. 7 is a schematic diagram of a lid of a heat storage tank in the third embodiment.

[0055] In this embodiment, the lid portion 17 is provided with a plurality of inflexible plate-shaped members 20 extending downward in the Z direction from its lower surface. The inflexible plate-shaped members 20 are an example of a second plate-shaped member. The material of the plate-shaped members 20 is, for example, a metal capable of withstanding the high-temperature air 5 during heat dissipation operation or heat storage operation. In addition, the dimension of the plate-shaped members 20 in the Z direction is desirably long enough to contact the solid sensible heat storage material 16 in the heat storage material built-in tank 24. The inflexible plate-shaped members 20 are an example of a gap flow path resistor.

[0056] Moreover, in the horizontal direction, the dimension of the plate-like member 20 in a direction perpendicular to the flow direction of the air 5 (that is, the Y direction in this example) preferably extends from one end of the heat storage material built-in tank 24 to the other end.

[0057] Although it is sufficient that one or more plate-like members 20 are provided on the cover portion 17, it is preferable to provide a plurality of plate-like members 20. In this example, five plate-like members 20 are provided, and are designated as 20a to 20e.

[0058] FIG. 8 is a diagram showing a schematic view of the lid of the heat storage tank in the third embodiment from a different angle.

[0059] Fig. 8 is a view of the lid 17 in Fig. 7 as viewed from the -Y direction. Fig. 8 also illustrates four solid sensible heat storage materials 16a to 16d out of the solid sensible heat storage materials 16 built into the heat storage material built-in tank 24.

[0060] When the plate-shaped member 20 is moved in the -Z direction to close the lid portion 17, it comes into contact with the solid sensible heat storage material 16 located directly below. Not all of the plate-shaped member 20 comes into contact with the solid sensible heat storage material 16 located directly below, but only a part of the plate-shaped member 20 may come into contact with the solid sensible heat storage material 16 located directly below, or it may not come into contact at all. Even when only a part of the plate-shaped member 20 comes into contact with the solid sensible heat storage material 16 or when it does not come into contact at all, the plate-shaped member 20 acts as a resistor for the passing air 23, and changes the flow path during heat storage operation and heat dissipation operation to guide the air to the solid sensible heat storage material 16.

[0061] In addition, since the plate-like member 20 is not flexible, it is deformed or broken when it comes into contact with the solid sensible heat storage material 16. On the other hand, the solid sensible heat storage material 16 is displaced or cracked when it comes into contact with the plate-like member 20.

[0062] In this example, the plate-shaped member 20b contacts the solid sensible heat storage material 16b, the plate-shaped member 20c contacts the solid sensible heat storage material 16c, and the plate-shaped member 20d contacts the solid sensible heat storage material 16d. Also, an example is shown in which the plate-shaped member 20b is damaged and deformed by contacting the solid sensible heat storage material 16b. Also, an example is shown in which the solid sensible heat storage material 16c is cracked by contacting the plate-shaped member 20c. There may be a plate-shaped member 20 that does not contact the solid sensible heat storage material 16.

[0063] As a result, the plate-like member 20 acts as a resistor for the air 23 passing through the upper part of the heat storage tank 1 during heat storage operation and heat dissipation operation, and changes the flow path. As a result, the amount of air 23 passing through is reduced, and the inflowing air 5 comes into contact with the solid sensible heat storage material 16, suppressing a decrease in the heat storage efficiency and heat dissipation efficiency.

[0064] FIG. 9 is a schematic view showing the cover in the third embodiment from another angle.

[0065] Fig. 9 shows a cross-sectional view taken along line CC' in Fig. 2, and is a view of the cover 17 as seen from the -X direction. As shown in Fig. 3, the plate-shaped member 20d is in contact with the solid sensible heat storage material 16d.

[0066] In addition, in this embodiment, the plate-like member 20 is disposed in a direction perpendicular to the flow direction of the air 5, but it is not necessarily required to dispose it in this direction. For example, if the plate-like member 20 is disposed at an angle to the flow direction of the air 5 so as to obstruct the flow of the air 5, it will become a resistance to the passing air 23.

[0067] Furthermore, the plate-like member 20 may be arranged in a direction parallel to the flow direction of the air 5. By arranging the plate-like member 20 in a direction parallel to the flow direction of the air 5, it is possible to prevent the passing air 23 in the ceiling air region 22 from circulating to the side when the heat storage tank 1 is stored for a long period of time from the end of the heat storage operation to the start of the heat dissipation operation. As a result, the plate-like member 20 suppresses the natural convection of the air 5 present in the gaps between the solid sensible heat storage materials 16, and it is possible to suppress the temperature distribution in the heat storage tank 1 from becoming higher toward the top and to suppress heat leakage to the outside world.

[0068] According to this embodiment, by providing the plate-like member 20 on the lid 17 of the heat storage tank 1, the plate-like member 20 becomes a resistor for the passing air 23 that passes through the ceiling air region 22 during heat storage operation and heat dissipation operation. As a result, the heat storage tank 1 can not only reduce the flow path cross-sectional area of ​​the ceiling air region 22, but also change the flow path of the passing air 23 and guide it to the solid sensible heat storage material 16. In addition, the plate-like member 20 lengthens the route through which the passing air 23 flows, preventing it from flowing to the ceiling air region 22. As a result, the passing air 23 is reduced, and a decrease in the heat storage efficiency and heat dissipation efficiency is suppressed.

[0069] (Fourth embodiment) FIG. 10 is a schematic diagram of the vicinity of the lid of the heat storage tank in the fourth embodiment.

[0070] In this embodiment, the wool-like member 21 is provided between the lower surface of the lid portion 17 and the solid sensible heat storage material 16. The wool-like member 21 is not fixed to the lower surface of the lid portion 17, and is placed on the solid sensible heat storage material 16 when the lid portion 17 is closed. Unlike FIG. 10, the wool-like member 21 may be fixed to the lid portion 17. The material of the wool-like member 21 is, for example, a metal thread or a ceramic fiber that can withstand the high-temperature air 5 during heat dissipation operation or heat storage operation. For example, steel wool, ceramic fiber, or glass wool may be used. In addition, the dimension of the wool-like member 21 in the -Z direction is desirably long enough to contact the solid sensible heat storage material 16 in the heat storage material built-in tank 24. The wool-like member 21 is an example of a gap flow path resistor. In addition, the wool-like member 21 does not need to be provided on the entire lower surface of the lid portion 17, and may be provided on a part of the lower surface.

[0071] Moreover, in the horizontal direction, the dimension of the wool-like member 21 in a direction perpendicular to the flow direction of the air 5 (that is, the Y direction in this example) preferably extends from one end of the heat storage material built-in tank 24 to the other end.

[0072] FIG. 11 is a schematic diagram showing the vicinity of the lid of the heat storage tank in the fourth embodiment from a different angle.

[0073] Fig. 11 is a view of the lid 17 of Fig. 10 as viewed from the -Y direction. When the lid 17 is moved in the -Z direction to close it, the wool-like member 21 comes into contact with the solid sensible heat storage material 16 located directly below and deforms. The entire wool-like member 21 does not have to come into contact with the solid sensible heat storage material 16 located directly below, and only a part of the wool-like member 21 may come into contact with the solid sensible heat storage material 16, or may not come into contact at all. Even when only a part of the wool-like member 21 comes into contact with the solid sensible heat storage material 16 or when it does not come into contact at all, the wool-like member 21 acts as a resistor for the passing air 23, and changes the flow path during heat storage operation and heat dissipation operation to guide the air to the solid sensible heat storage material 16.

[0074] In this example, the wool-like member 21 is in contact with the solid sensible heat storage material 16 located thereon.

[0075] In the present embodiment, even if sufficient time has passed and the ceiling air region 22 has expanded, the amount of deformation of the wool-like member 21 in contact with the solid sensible heat storage material 16 is merely reduced. Even if sufficient time has passed, the wool-like member 21 still has the role of changing the flow path of the passing air 23.

[0076] In addition, in the horizontal direction, the dimension of the wool-like member 21 in the direction perpendicular to the flow direction of the air 5 desirably extends from one end of the heat storage material built-in tank 24 to the other end, but it may extend in a direction other than this. If the wool-like member 21 is extended at an angle to the flow direction of the air 5 so as to impede the flow of the air 5, it serves as a resistance to the passing air 23.

[0077] Moreover, the wool-like member 21 may be elongated in a direction parallel to the flow direction of the air 5. By lengthening the wool-like member 21 in a direction parallel to the flow direction of the air 5, it is possible to prevent the passing air 23 in the ceiling air region 22 from circulating to the side when the heat storage tank 1 is stored for a long period of time from the end of the heat storage operation to the start of the heat dissipation operation. As a result, the wool-like member 21 suppresses the natural convection of the air 5 present in the gaps in the solid sensible heat storage material 16, and it is possible to suppress the temperature distribution in the heat storage tank 1 from becoming higher toward the upper part and to suppress heat leakage to the outside world.

[0078] FIG. 12 is a schematic view showing the cover in the fourth embodiment from another angle.

[0079] 12 shows a DD' cross-sectional view of Fig. 11, in which lid portion 17 is seen from the -X direction, and illustrates a schematic view of the vicinity of lid portion 17 when lid portion 17 is closed. As shown in Fig. 12, only the portion of wool-like member 21 that is in contact with solid sensible heat storage material 16 is deformed.

[0080] FIG. 13 is a diagram showing a schematic diagram of a modified example of the heat storage tank in the fourth embodiment.

[0081] Fig. 13A shows the bottom of the heat storage tank 1, and Fig. 13B shows the side of the heat storage tank 1. In this modification, a wool-like member 21 is provided on the bottom or side of a heat storage material-containing tank 24.

[0082] Wool-like member 21 may be provided on the entire bottom of heat storage material-containing tank 24, or may be provided on only a part of it. In the horizontal direction, the dimension of wool-like member 21 in the direction perpendicular to the flow direction of air 5 desirably extends from one end of heat storage material-containing tank 24 to the other end, but may extend in other directions. If wool-like member 21 is extended at an angle to the flow direction of air 5 so as to impede the flow of air 5, it serves as a resistance to passing air 23 in the bottom air region. Wool-like member 21 comes into contact with solid sensible heat storage material 16 and deforms when solid sensible heat storage material 16 is filled in.

[0083] Furthermore, the wool-like member 21 may be elongated in a direction parallel to the flow direction of the air 5 at the bottom of the heat storage material built-in tank 24. By elongating the wool-like member 21 in a direction parallel to the flow direction of the air 5, it is possible to prevent the air in the side air region from circulating to the bottom air region when the heat storage tank 1 is stored for a long period of time from the end of the heat storage operation to the start of the heat dissipation operation. As a result, the wool-like member 21 suppresses the natural convection of the air 5 present in the gaps in the solid sensible heat storage material 16, and it is possible to suppress the temperature distribution in the heat storage tank 1 from becoming higher at the top and to suppress heat leakage to the outside world.

[0084] The wool-like member 21 may be provided on the entire side of the heat storage material-containing tank 24, or may be provided on only a part of the side. The dimension of the wool-like member 21 in the direction parallel to the flow direction of the air 5 (that is, the X direction in this example) desirably extends from one end of the heat storage material-containing tank 24 to the other end, but may be extended in a direction other than this. If the wool-like member 21 is extended at an angle to the flow direction of the air 5 so as to impede the flow of the air 5, it serves as a resistance to the passing air 23 in the side air region. The wool-like member 21 comes into contact with the solid sensible heat storage material 16 and deforms when the solid sensible heat storage material 16 is filled.

[0085] Furthermore, the wool-like member 21 may be elongated in a direction perpendicular to the flow direction of the air 5 at the side of the heat storage material built-in tank 24. By lengthening the wool-like member 21 in a direction perpendicular to the flow direction of the air 5, it is possible to prevent the passing air 23 in the ceiling air region 22 from flowing into the side air region when the heat storage tank 1 is stored for a long period of time from the end of the heat storage operation to the start of the heat dissipation operation. Furthermore, the wool-like member 21 can prevent the air 5 in the side air region from flowing into the bottom air region. As a result, the wool-like member 21 suppresses the natural convection of the air 5 present in the gaps in the solid sensible heat storage material 16, and it is possible to suppress the temperature distribution in the heat storage tank 1 from becoming higher toward the upper part and to suppress heat leakage to the outside.

[0086] According to this embodiment, by providing the wool-like member 21 on the lid 17 of the heat storage tank 1, the wool-like member 21 becomes a resistor for the passing air 23 that passes through the ceiling air region 22 during heat storage operation and heat dissipation operation. As a result, the heat storage tank 1 can not only reduce the flow path cross-sectional area of ​​the ceiling air region 22, but also change the flow path of the passing air 23 and guide it to the solid sensible heat storage material 16. In addition, the wool-like member 21 lengthens the route through which the passing air 23 flows, preventing it from flowing to the ceiling air region 22. As a result, the passing air 23 is reduced, and a decrease in the heat storage efficiency and heat dissipation efficiency is suppressed.

[0087] Furthermore, according to this embodiment, the lid portion 17 is provided with the wool-like member 21, so that even if the position of the solid sensible heat storage material 16 inside the heat storage tank 1 is lowered and the ceiling air area 22 is expanded, the deformation amount of the wool-like member 21 is merely reduced, and the amount of passing air 23 can be reduced.

[0088] Furthermore, according to a modified example of this embodiment, by providing wool-like member 21 on the bottom or side of heat storage material built-in tank 24, wool-like member 21 acts as a resistor for passing air 23 in the bottom air region or side air region. This suppresses natural convection of air 5 present in the gaps between solid sensible heat storage materials 16, and prevents the temperature distribution in heat storage tank 1 from becoming higher toward the top, and prevents heat leakage to the outside world.

[0089] Fifth embodiment FIG. 14 is a schematic diagram of the vicinity of the lid of the heat storage tank in the fifth embodiment.

[0090] In this embodiment, the flexible member 34 is provided between the lower surface of the lid portion 17 and the solid sensible heat storage material 16. The flexible member 34 is not fixed to the lower surface of the lid portion 17, and is placed on the solid sensible heat storage material 16 when the lid portion 17 is closed. Unlike FIG. 14, the flexible member 34 may be fixed to the lid portion 17. The material of the flexible member 34 is, for example, a crushable porous ceramic. In addition, the dimension of the flexible member 34 in the -Z direction is desirably long enough to contact the solid sensible heat storage material 16 in the heat storage material built-in tank 24. The flexible member 34 is an example of a gap flow path resistor. In addition, the flexible member 34 does not need to be provided on the entire lower surface of the lid portion 17, and may be provided on a part of the lower surface.

[0091] Moreover, in the horizontal direction, the dimension of the flexible member 34 in the direction perpendicular to the flow direction of the air 5 (that is, the Y direction in this example) preferably extends from one end of the heat storage material built-in tank 24 to the other end.

[0092] FIG. 15 is a diagram showing the vicinity of the lid of the heat storage tank in the fourth embodiment, viewed from a different angle.

[0093] Fig. 15 is a view of the lid 17 of Fig. 14 as viewed from the -Y direction. When the lid 17 is moved in the -Z direction to close it, the flexible member 34 comes into contact with the solid sensible heat storage material 16 located directly below and deforms. The entire flexible member 34 does not have to come into contact with the solid sensible heat storage material 16 located directly below, but only a part of the flexible member 34 may come into contact with the solid sensible heat storage material 16, or it may not come into contact at all. Even when only a part of the flexible member 34 comes into contact with the solid sensible heat storage material 16 or when it does not come into contact at all, the flexible member 34 acts as a resistor for the passing air 23, and changes the flow path during heat storage operation and heat dissipation operation to guide the air to the solid sensible heat storage material 16.

[0094] In this example, the flexible member 34 is shown in contact with the solid sensible heat storage material 16 located thereon.

[0095] In the present embodiment, even if sufficient time has passed and the ceiling air region 22 has expanded, the amount of deformation of the flexible member 34 in contact with the solid sensible heat storage material 16 is merely reduced. Even if sufficient time has passed, the flexible member 34 still has the role of changing the flow path of the passing air 23.

[0096] In addition, in the horizontal direction, the dimension of the flexible member 34 in the direction perpendicular to the flow direction of the air 5 desirably extends from one end of the heat storage material-containing tank 24 to the other end, but it may extend in a direction other than this. If the flexible member 34 is extended at an angle to the flow direction of the air 5 so as to impede the flow of the air 5, it serves as a resistance to the passing air 23.

[0097] Moreover, the flexible member 34 may be elongated in a direction parallel to the flow direction of the air 5. By lengthening the flexible member 34 in a direction parallel to the flow direction of the air 5, it is possible to prevent the passing air 23 in the ceiling air region 22 from circulating to the side when the heat storage tank 1 is stored for a long period of time from the end of the heat storage operation to the start of the heat dissipation operation. As a result, the flexible member 34 suppresses the natural convection of the air 5 present in the gaps between the solid sensible heat storage material 16, and it is possible to suppress the temperature distribution in the heat storage tank 1 from becoming higher toward the upper part and to suppress heat leakage to the outside world.

[0098] FIG. 16 is a schematic view showing the cover in the fifth embodiment from another angle.

[0099] 16 shows an E-E' cross-sectional view of Fig. 15, in which lid portion 17 is seen from the -X direction, and illustrates a schematic view of the vicinity of lid portion 17 when lid portion 17 is closed. As shown in Fig. 16, only the portion of flexible member 34 that is in contact with solid sensible heat storage material 16 is deformed.

[0100] According to this embodiment, by providing the flexible member 34 on the lid 17 of the heat storage tank 1, the flexible member 34 becomes a resistor for the passing air 23 passing through the ceiling air region 22 during heat storage operation and heat dissipation operation. As a result, in addition to reducing the flow path cross-sectional area of ​​the ceiling air region 22, the heat storage tank 1 can change the flow path of the flexible member 34 and guide the passing air to the solid sensible heat storage material 16. In addition, the flexible member 34 lengthens the route through which the passing air 23 flows, preventing it from flowing to the ceiling air region 22. As a result, the passing air 23 is reduced and a decrease in the heat storage efficiency and heat dissipation efficiency is suppressed.

[0101] Furthermore, according to this embodiment, the lid portion 17 is provided with a flexible member 34, so that even if the position of the solid sensible heat storage material 16 inside the heat storage tank 1 is lowered and the ceiling air area 22 is expanded, the amount of deformation of the flexible member 34 is merely reduced, and the amount of passing air 23 can be reduced.

[0102] Sixth embodiment FIG. 17 is a schematic diagram showing a lid of a heat storage tank in the sixth embodiment.

[0103] In this embodiment, the lid portion 17 is provided with a plurality of flap-shaped members 32 extending downward in the Z direction from the lower surface thereof. The material of the flap-shaped members 32 is, for example, a metal capable of withstanding the high-temperature air 5 during heat dissipation operation or heat storage operation. Moreover, the dimension of the flap-shaped members 32 in the Z direction is desirably long enough to contact the solid sensible heat storage material 16 in the heat storage material built-in tank 24. The flap-shaped members 32 are an example of a gap flow path resistor.

[0104] Moreover, in the horizontal direction, it is desirable that the dimension of the flap-shaped members 32 in a direction perpendicular to the flow direction of the air 5 (that is, the Y direction in this example) extends from one end of the heat storage material built-in tank 24 to the other end.

[0105] Furthermore, it is sufficient that one or more flap-shaped members 32 are provided on the lid portion 17, but it is preferable to provide a plurality of flap-shaped members 32. In this example, five flap-shaped members 32 are provided, and are designated 32a to 32e. The flap-shaped members 32 are provided rotatably by, for example, a hinge 30.

[0106] FIG. 18 is a diagram showing a schematic view of the lid of the heat storage tank in the sixth embodiment from a different angle.

[0107] Fig. 18 is a view of the lid 17 in Fig. 17 as viewed from the -Y direction. Fig. 18 also illustrates five solid sensible heat storage materials 16a to 16e out of the solid sensible heat storage materials 16 built into the heat storage material built-in tank 24.

[0108] When the flap-shaped member 32 is moved in the -Z direction to close the lid portion 17, the flap-shaped member 32 comes into contact with the solid sensible heat storage material 16 located directly below and rotates. As shown in FIG. 18, the flap-shaped member 32 rotates at different angles depending on the state of contact with the solid sensible heat storage material 16 located directly below. All of the flap-shaped members 32 do not have to come into contact with the solid sensible heat storage material 16 located directly below, and only a part of the flap-shaped member 32 may come into contact with the solid sensible heat storage material 16, or may not come into contact at all. Even when only a part of the flap-shaped member 32 comes into contact with the solid sensible heat storage material 16 or when the flap-shaped member 32 does not come into contact with the solid sensible heat storage material 16 at all, the flap-shaped member 32 acts as a resistor for the passing air 23, and changes the flow path during heat storage operation and heat dissipation operation to guide the air to the solid sensible heat storage material 16.

[0109] In this example, the flap-shaped members 32a to 32e are in contact with the solid sensible heat storage materials 16a to 16e, respectively. In this figure, the flap-shaped members 32a to 32e are shown rotating in the +X direction, but they may also rotate in the -X direction.

[0110] As a result, the flap-shaped member 32 acts as a resistor for the air 23 passing through the upper part of the heat storage tank 1 during heat storage operation and heat dissipation operation, and changes the flow path. As a result, the amount of air 23 passing through is reduced, and the inflowing air 5 comes into contact with the solid sensible heat storage material 16, suppressing a decrease in the heat storage efficiency and heat dissipation efficiency.

[0111] In addition, the flap-shaped member 32 in this embodiment rotates in response to the expansion of the ceiling air region 22 after a sufficient amount of time has passed. Even after a sufficient amount of time has passed, the flap-shaped member 32 has a role of changing the flow path of the passing air 23.

[0112] FIG. 19 is a diagram illustrating a modified example of the heat storage tank in the sixth embodiment.

[0113] Here, the passing air 23 may be biased toward the ceiling air region 22 on the downstream side, and if the shape of the solid sensible heat storage material 16 is uneven, the height of the ceiling air region 22 will differ depending on each position in the vertical direction. In order to reduce the flow path cross-sectional area of ​​the ceiling air region 22, it is preferable that the flap-shaped member 32 is divided in a direction perpendicular to the flow direction of the air 5.

[0114] FIG. 19 is a view of the heat storage tank 1 in this modification from the +Z direction, and the +X direction is shown as the flow direction of the air 5. In this modification, the lid portion 17 is provided with a plurality of flap-shaped members 32 extending downward in the Z direction from its lower surface. Unlike the lid portion 17 shown in FIG. 17, the flap-shaped members 32 are arranged by dividing them into a plurality of parts in a direction perpendicular to the flow direction of the air 5. In this example, five flap-shaped members 32a to 32e are arranged in the horizontal direction, and the flap-shaped members 32 in each row are divided into three parts of equal size. The flap-shaped members 32 in each row may be divided into equal widths or may be divided into different widths. In addition, the more the number of divisions, the better. For example, the flap-shaped members 32 may be divided into N parts (N is a positive integer) in the vertical direction. Instead of dividing the flap-shaped members 32, a corrugated plate-shaped member to be described later may also be divided and used.

[0115] As described above, even if the height of the ceiling air region 22 varies depending on the position and there are unevenness, each flap-shaped member 32 divided at an angle corresponding to the shape of the unevenness rotates, thereby further reducing the flow path cross-sectional area of ​​the ceiling air region 22.

[0116] According to this embodiment, by providing the flap-shaped member 32 on the lid 17 of the heat storage tank 1, the flap-shaped member 32 becomes a resistor for the passing air 23 passing through the ceiling air region 22 during heat storage operation and heat dissipation operation. As a result, the heat storage tank 1 can not only reduce the flow path cross-sectional area of ​​the ceiling air region 22, but also change the flow path of the passing air 23 and guide it to the solid sensible heat storage material 16. In addition, the flap-shaped member 32 lengthens the route through which the passing air 23 flows, preventing it from flowing to the ceiling air region 22. As a result, the passing air 23 is reduced, and a decrease in the heat storage efficiency and heat dissipation efficiency is suppressed.

[0117] Furthermore, according to this embodiment, the lid portion 17 is provided with a flap-shaped member 32, so that even if the position of the solid sensible heat storage material 16 inside the heat storage tank 1 is lowered and the ceiling air area 22 is expanded, the flap-shaped member 32 can rotate at a corresponding angle to reduce the amount of passing air 23.

[0118] Furthermore, according to a modified example of this embodiment, even if the height of the ceiling air region 22 varies depending on the position due to unevenness in the solid sensible heat storage material 16, the flap-shaped member 32, which is divided at a rotation angle corresponding to the shape of the unevenness, rotates, and the flow path cross-sectional area of ​​the ceiling air region 22 can be further reduced.

[0119] Seventh embodiment FIG. 20 is a schematic diagram showing a lid of a heat storage tank in the seventh embodiment.

[0120] In the heat storage system 100, the flow direction of the air 5 is reversed during the heat storage operation and the heat dissipation operation. During the heat storage operation and the heat dissipation operation, depending on the size of the ceiling air area 22 and the flow rate of the passing air 23, the flap-shaped member 32 may not have enough weight to be pushed aside by the passing air 23 or may be unable to come into contact with or approach the solid sensible heat storage material 16 inside the heat storage material built-in tank 24.

[0121] Fig. 20 is a view of the lid portion 17 in this embodiment as viewed from the -Y direction. The lid portion 17 in this embodiment differs from that in Fig. 18 in that the flap-shaped member 32 has directivity in the rotation direction.

[0122] In this embodiment, the flap-shaped members 32 have different rotation directions alternately in the arranged order, and the flap-shaped members 32a, 32c, and 32e rotate in the +X direction, and the flap-shaped members 32b and 32d rotate in the -X direction. As shown in Fig. 20, the flap-shaped members 32 rotate at different angles depending on the state of contact with the solid sensible heat of the heat storage material 16. When the lid portion 17 is closed, if the flap-shaped members 32 come into contact with the solid sensible heat storage material 16, they rotate in a predetermined rotation direction.

[0123] The number of flap-shaped members 32 with alternating rotation directions is not limited to five as shown in Fig. 20. The lid portion 17 has a plurality of flap-shaped members 32, and includes a first flap-shaped member and a second flap-shaped member in the horizontal direction, and the first flap-shaped member and the second flap-shaped member may be configured to rotate in opposite directions in the horizontal direction.

[0124] According to this embodiment, the rotation directions of the flap-shaped members 32 are alternately different depending on the arrangement order. This makes it possible for the heat storage tank 1 to prevent the flap-shaped members 32 from being pushed aside by the passing air 23.

[0125] Eighth embodiment FIG. 21 is a schematic diagram showing a lid of a heat storage tank in the eighth embodiment.

[0126] FIG. 21 is a view of the lid 17 in this embodiment as viewed from the -Y direction. Compared to FIG. 20, the lid 17 in this embodiment includes multiple corrugated plate-shaped members 33 instead of the flap-shaped members 32. For the corrugated plate-shaped members 33, for example, a member having elasticity and contractibility such as a leaf spring can be used. Since the corrugated plate-shaped members 33 are structures that are not easily affected by the flow direction of the air 5, by using the corrugated plate-shaped members 33 as gap flow resistance members, it is possible to prevent the plate-shaped members 33 from being pushed aside and being less susceptible to the force of the passing air 23 in the flow direction. In FIG. 21, the plate-shaped members 33 are arranged alternately in the horizontal direction with the wave directions facing in opposite directions. This makes it more difficult to be affected by the force of the passing air 23 in the flow direction and prevents the plate-shaped members 33 from being pushed aside.

[0127] The number of corrugated plate-like members 33 with alternating wave directions is not limited to five as shown in Fig. 21. The cover portion 17 may include a plurality of corrugated plate-like members 33. The plurality of plate-like members 33 may include a first corrugated plate-like member and a second corrugated plate-like member in the horizontal direction, and the first corrugated plate-like member and the second corrugated plate-like member may be arranged in the opposite direction.

[0128] When the corrugated member 33 is moved in the -Z direction to close the lid portion 17, it comes into contact with the solid sensible heat storage material 16 located directly below. Not all of the corrugated member 33 comes into contact with the solid sensible heat storage material 16 located directly below, but only a portion of the corrugated member 33 may come into contact with the solid sensible heat storage material 16 located directly below, or it may not come into contact at all. Even when only a portion of the corrugated member 33 comes into contact with the solid sensible heat storage material 16 or when it does not come into contact at all, the corrugated member 33 acts as a resistor for the passing air 23, and changes the flow path during heat storage operation and heat dissipation operation to guide the air to the solid sensible heat storage material 16.

[0129] According to this embodiment, the lid portion 17 is provided with a plurality of corrugated members 33. This makes it possible for the heat storage tank 1 to prevent the corrugated members 33 from being pushed aside by the passing air 23.

[0130] Ninth embodiment FIG. 22 is a schematic diagram of a heat storage tank according to the ninth embodiment.

[0131] 19, each row of flap-shaped members 32 is divided into three and arranged in a regular arrangement on the lid portion 17. Since there are some gaps between the flap-shaped members 32 in each row, even if the flap-shaped members 32 or the corrugated members 33 are in contact with the solid sensible heat storage material 16, if these gaps are large, the passing air 23 may flow through these gaps.

[0132] 22 is a view of the heat storage tank 1 in the ninth embodiment as viewed from the +Z direction, and also shows the +X direction as the flow direction of the air 5. In this embodiment, the lid portion 17 is provided with a plurality of flap-shaped members 32 or corrugated members 33 extending downward in the Z direction from the lower surface thereof. For the sake of explanation, an example in which a plurality of flap-shaped members 32 are provided will be taken up below.

[0133] In this embodiment, the flap-shaped members 32 in each row are divided into a plurality of pieces and arranged. In this example, nine rows of flap-shaped members 32a to 32i are arranged, and for each row of flap-shaped members 32, the flap-shaped members 32 in odd-numbered rows are divided into three equal-sized pieces. Also, the flap-shaped members 32 in even-numbered rows are divided into three different-sized pieces. Also, the divided flap-shaped members 32 are arranged in a staggered pattern so that the gaps between the flap-shaped members 32 in the odd-numbered rows and the even-numbered rows are not linear in the flow direction of the air 5.

[0134] The number of flap-like members 32 installed in each divided row is not limited to nine. The lid portion 17 has a plurality of flap-like members 32 in the horizontal direction, and includes a first row of flap-like members 32 divided in the vertical direction and a second row of flap-like members 32 divided in the vertical direction, and each divided flap-like member 32 in the first row of flap-like members 32 and each divided flap-like member 32 in the second row of flap-like members 32 are arranged in a staggered arrangement. The same applies to the case where corrugated members 33 are arranged in place of the flap-like members 32 in the lid portion 17.

[0135] According to this embodiment, the flap-shaped members 32 in each row are divided, and the divided flap-shaped members 32 are arranged in a staggered pattern so that the gaps between the flap-shaped members 32 are not linear in the flow direction of the air 5. This makes it possible for the heat storage tank 1 to prevent the passing air 23 from circulating through the gaps between the flap-shaped members 32 in each row during heat storage operation and heat dissipation operation, and to change the flow path of the passing air 23 and guide it to the solid sensible heat storage material 16.

[0136] Tenth embodiment FIG. 23 is a diagram showing a schematic view of the vicinity of the lid of the heat storage tank in the tenth embodiment.

[0137] In this embodiment, the vicinity of the lid portion 17 is viewed from the -X direction. Description of the same contents as in the first embodiment will be omitted.

[0138] In this embodiment, the heat storage tank 1 includes a lid portion 17 as an inner lid, and further includes an outer lid 26 on the top of the lid portion 17. Also, in this embodiment, the lid portion 17 is not fixed to the heat storage material built-in tank 24 or the outer lid 26. Also, the lid portion 17 is provided with a flexible plate-like member 18 extending downward in the Z direction from its lower surface. The lid portion 17 descends downward due to its own weight, and presses down the solid sensible heat storage material 16. The other configurations are the same as those of the first embodiment.

[0139] The lid portion 17 drops downward due to its own weight, and the plate-shaped member 18 comes into contact with the solid sensible heat storage material 16, making it more difficult for air 5 to pass through the ceiling air region 22 during heat storage operation and heat dissipation operation compared to the first embodiment.

[0140] Furthermore, even if sufficient time has passed and the position of the solid sensible heat storage material 16 has become lower, the plate-shaped member 18 will move further downward due to its own weight, and the gap between the plate-shaped member 18 and the solid sensible heat storage material 16 will not widen, so the amount of air 5 passing through the ceiling air region 22 will not increase.

[0141] According to this embodiment, the heat storage tank 1 includes an outer lid 26 in addition to the lid portion 17 as an inner lid. Moreover, since the lid portion 17 is not fixed to the heat storage material built-in tank 24 or the outer lid 26, it moves downward by its own weight and presses down the solid sensible heat storage material 16. As a result, the heat storage tank 1 makes it more difficult for the air 5 to pass through the ceiling air region 22 during the heat storage operation and the heat dissipation operation, reducing the amount of air passing through 23 and making it possible to suppress a decrease in the heat storage efficiency and the heat dissipation efficiency.

[0142] Furthermore, according to this embodiment, since the heat storage tank 1 is equipped with a flexible plate-like member 18, even if the position of the solid sensible heat storage material 16 inside the heat storage tank 1 is lowered and the ceiling air region 22 is expanded, the lid portion 17 only requires a smaller amount of bending of the plate-like member 18, and the amount of passing air 23 can be reduced.

[0143] Eleventh embodiment FIG. 24 is a diagram showing a schematic view of the vicinity of the lid in the eleventh embodiment.

[0144] In this embodiment, the vicinity of the lid portion 17 is viewed from the -X direction. Description of the same contents as in the second embodiment will be omitted.

[0145] In this embodiment, the heat storage tank 1 includes a lid portion 17 as an inner lid, and further includes an outer lid 26 on the top of the lid portion 17. Also, in this embodiment, the lid portion 17 is not fixed to the heat storage material built-in tank 24 or the outer lid 26. Also, the lid portion 17 is provided with a plurality of flexible rod-shaped members 19 extending downward in the Z direction from its lower surface. The lid portion 17 descends downward by its own weight, pressing down the solid sensible heat storage material 16. The other configurations are the same as those of the second embodiment.

[0146] The lid portion 17 drops downward due to its own weight, and the rod-shaped member 19 comes into contact with the solid sensible heat storage material 16, making it more difficult for air 5 to pass through the ceiling air region 22 during heat storage operation and heat dissipation operation compared to the second embodiment.

[0147] Furthermore, even if sufficient time has passed and the position of the solid sensible heat storage material 16 has become lower, the rod-shaped member 19 will move further downward due to its own weight, and the space between the rod-shaped member 19 and the solid sensible heat storage material 16 will not widen, so the amount of air 5 passing through the ceiling air area 22 will not increase.

[0148] According to this embodiment, the heat storage tank 1 includes an outer lid 26 in addition to the lid portion 17 as an inner lid. Moreover, since the lid portion 17 is not fixed to the heat storage material built-in tank 24 or the outer lid 26, it drops downward by its own weight and presses down the solid sensible heat storage material 16. As a result, the heat storage tank 1 makes it more difficult for the air 5 to pass through the ceiling air region 22 during the heat storage operation and the heat dissipation operation, reducing the amount of air passing through 23 and making it possible to suppress a decrease in the heat storage efficiency and the heat dissipation efficiency.

[0149] Furthermore, according to this embodiment, since the heat storage tank 1 is provided with a plurality of flexible rod-shaped members 19, even if the position of the solid sensible heat storage material 16 inside the heat storage tank 1 is lowered and the ceiling air region 22 is expanded, the lid portion 17 only requires a smaller amount of bending of the rod-shaped members 19, and the amount of passing air 23 can be reduced.

[0150] Twelfth embodiment FIG. 25 is a diagram showing a schematic view of the vicinity of the lid in the twelfth embodiment.

[0151] In this embodiment, the vicinity of the lid portion 17 is viewed from the -X direction. Description of the same contents as in the third embodiment will be omitted.

[0152] In this embodiment, the heat storage tank 1 includes a lid portion 17 as an inner lid, and further includes an outer lid 26 on the top of the lid portion 17. Also, in this embodiment, the lid portion 17 is not fixed to the heat storage material built-in tank 24 or the outer lid 26. Also, the lid portion 17 is provided with an inflexible plate-like member 20 extending downward in the Z direction from its lower surface. The lid portion 17 descends downward by its own weight, pressing down the solid sensible heat storage material 16. The other configurations are the same as those of the third embodiment.

[0153] The lid portion 17 drops downward due to its own weight, and the plate-shaped member 20 comes into contact with the solid sensible heat storage material 16, making it more difficult for air 5 to pass through the ceiling air region 22 during heat storage operation and heat dissipation operation compared to the third embodiment.

[0154] Furthermore, even if sufficient time has passed and the position of the solid sensible heat storage material 16 has become lower, the plate-shaped member 20 will drop further downward due to its own weight, and the gap between the plate-shaped member 20 and the solid sensible heat storage material 16 will not widen, so the amount of air 5 passing through the ceiling air area 22 will not increase.

[0155] According to this embodiment, the heat storage tank 1 includes an outer lid 26 in addition to the lid portion 17 as an inner lid. Moreover, since the lid portion 17 is not fixed to the heat storage material built-in tank 24 or the outer lid 26, it drops downward by its own weight and presses down the solid sensible heat storage material 16. As a result, the heat storage tank 1 makes it more difficult for the air 5 to pass through the ceiling air region 22 during the heat storage operation and the heat dissipation operation, reducing the amount of air passing through 23 and making it possible to suppress a decrease in the heat storage efficiency and the heat dissipation efficiency.

[0156] Furthermore, according to this embodiment, even if the position of the solid sensible heat storage material 16 inside the heat storage tank 1 becomes lower and the ceiling air region 22 expands, the lid 17 moves further downward due to its own weight. This allows the plate-like member 20 to continue to contact the solid sensible heat storage material 16, thereby reducing the amount of air 23 passing through.

[0157] Thirteenth embodiment FIG. 26 is a diagram showing a schematic view of the vicinity of the lid in the thirteenth embodiment.

[0158] In this embodiment, the vicinity of the lid portion 17 is viewed from the -X direction. Description of the same contents as those in the fourth embodiment will be omitted.

[0159] In this embodiment, the heat storage tank 1 includes a lid portion 17 as an inner lid, and further includes an outer lid 26 on the top of the lid portion 17. In this embodiment, the lid portion 17 is not fixed to the heat storage material built-in tank 24 or the outer lid 26. In addition, a wool-like member 21 is provided between the bottom surface of the lid portion 17 and the rock. The wool-like member 21 is not fixed to the bottom surface of the lid portion 17, and is placed on the solid sensible heat storage material 16 when the lid portion 17 is closed. The wool-like member 21 may be fixed to the lid portion 17. The lid portion 17 descends downward by its own weight and presses down the solid sensible heat storage material 16. The other configurations are the same as those of the fourth embodiment.

[0160] The lid portion 17 drops downward due to its own weight, and the wool-like member 21 comes into contact with the solid sensible heat storage material 16, making it more difficult for air 5 to pass through the ceiling air region 22 during heat storage operation and heat dissipation operation compared to the fourth embodiment.

[0161] Furthermore, even if sufficient time has passed and the position of the solid sensible heat storage material 16 has become lower, the wool-like member 21 will drop further downward due to its own weight, and the space between the wool-like member 21 and the solid sensible heat storage material 16 will not widen, so the amount of air 5 passing through the ceiling air area 22 will not increase.

[0162] According to this embodiment, the heat storage tank 1 includes an outer lid 26 in addition to the lid portion 17 as an inner lid. Moreover, since the lid portion 17 is not fixed to the heat storage material built-in tank 24 or the outer lid 26, it drops downward by its own weight and presses down the solid sensible heat storage material 16. As a result, the heat storage tank 1 makes it more difficult for the air 5 to pass through the ceiling air region 22 during the heat storage operation and the heat dissipation operation, reducing the amount of air passing through 23 and making it possible to suppress a decrease in the heat storage efficiency and the heat dissipation efficiency.

[0163] Furthermore, according to this embodiment, even if the position of the solid sensible heat storage material 16 inside the heat storage tank 1 becomes lower and the ceiling air region 22 expands, the lid portion 17 moves further downward due to its own weight. As a result, the wool-like member 21 continues to contact the solid sensible heat storage material 16, and the amount of passing air 23 can be reduced.

[0164] Fourteenth embodiment FIG. 27 is a diagram showing a schematic view of the vicinity of the lid in the fourteenth embodiment.

[0165] In this embodiment, the vicinity of the lid portion 17 is viewed from the -X direction. Description of the same contents as those in the fourth embodiment will be omitted.

[0166] In this embodiment, the heat storage tank 1 includes a lid portion 17 as an inner lid, and further includes an outer lid 26 on the top of the lid portion 17. In this embodiment, the lid portion 17 is not fixed to the heat storage material built-in tank 24 or the outer lid 26. In addition, a flexible member 34 is provided between the bottom surface of the lid portion 17 and the rock. The flexible member 34 is not fixed to the bottom surface of the lid portion 17, and is placed on the solid sensible heat storage material 16 when the lid portion 17 is closed. The flexible member 34 may also be fixed to the lid portion 17. The lid portion 17 descends downward by its own weight and presses down the solid sensible heat storage material 16. The other configurations are the same as those of the fifth embodiment.

[0167] The lid portion 17 drops downward due to its own weight, and the flexible member 34 comes into contact with the solid sensible heat storage material 16, making it more difficult for air 5 to pass through the ceiling air region 22 during heat storage operation and heat dissipation operation compared to the fifth embodiment.

[0168] Furthermore, even if sufficient time has passed and the position of the solid sensible heat storage material 16 has become lower, the wool-like member 21 will drop further downward due to its own weight, and the space between the flexible member 34 and the solid sensible heat storage material 16 will not widen, so the amount of air 5 passing through the ceiling air area 22 will not increase.

[0169] According to this embodiment, the heat storage tank 1 includes an outer lid 26 in addition to the lid portion 17 as an inner lid. Moreover, since the lid portion 17 is not fixed to the heat storage material built-in tank 24 or the outer lid 26, it drops downward by its own weight and presses down the solid sensible heat storage material 16. As a result, the heat storage tank 1 makes it more difficult for the air 5 to pass through the ceiling air region 22 during the heat storage operation and the heat dissipation operation, reducing the amount of air passing through 23 and making it possible to suppress a decrease in the heat storage efficiency and the heat dissipation efficiency.

[0170] Furthermore, according to this embodiment, even if the position of the solid sensible heat storage material 16 inside the heat storage tank 1 becomes lower and the ceiling air region 22 expands, the lid 17 moves further downward due to its own weight. This allows the flexible member 34 to continue to contact the solid sensible heat storage material 16, thereby reducing the amount of air 23 passing through.

[0171] Fifteenth embodiment FIG. 28 is a diagram showing a schematic diagram of a heat storage tank according to the fifteenth embodiment.

[0172] FIG. 28 is a view of the heat storage tank 1 in this embodiment as viewed from the -Y direction. In this embodiment, the heat storage tank 1 has a flexible sheet-like member 27 placed on the solid sensible heat storage material 16 built into the heat storage material built-in tank 24, and a weight member 28 placed on the flexible sheet-like member 27. In this embodiment, the lid portion 17 is placed on the flexible sheet-like member 27 and the weight member 28. The sheet-like member 27 is placed so that at least a portion of it is in contact with the solid sensible heat storage material 16, and the weight member 28 is placed so that at least a portion of it is in contact with the sheet-like member 27. The material of the sheet-like member 27 and the weight member 28 is, for example, a metal that can withstand high temperatures of air. In the following embodiment, in such an aspect, the sheet-like member 27 is expressed as being placed "on" the solid sensible heat storage material 16, and the weight member 28 is expressed as being placed "on" the sheet-like member 27.

[0173] Since the weight member 28 presses down the flexible sheet-like member 27, the sheet-like member 27 does not separate from the solid sensible heat storage material 16. The sheet-like member 27 makes it difficult for the air 5 passing through the inside of the solid sensible heat storage material 16 to flow out into the ceiling air region 22, so the flow rate of the passing air 23 decreases.

[0174] Furthermore, because the sheet-like member 27 is flexible, even if the position of the solid sensible heat storage material 16 becomes lower after a sufficient amount of time has passed, the position of the sheet-like member 27 will be lowered in response to the lowering of the position of the solid sensible heat storage material 16. Therefore, the gap between the sheet-like member 27 and the solid sensible heat storage material 16 will not widen, and the flow rate of the passing air 23 will not increase.

[0175] According to this embodiment, the heat storage tank 1 includes a flexible sheet-like member 27 on the solid sensible heat storage material 16, and a weight member 28 on the sheet-like member 27. The weight member 28 presses down the solid sensible heat storage material 16 via the sheet-like member 27. This makes it more difficult for the air 5 to pass through the ceiling air region 22 during the heat storage operation and the heat dissipation operation, reducing the amount of air passing through 23, and making it possible to suppress a decrease in the heat storage efficiency and the heat dissipation efficiency.

[0176] Furthermore, according to this embodiment, since the sheet-like member 27 has flexibility, even if the position of the solid sensible heat storage material 16 inside the heat storage tank 1 is lowered and the ceiling air region 22 expands, the position of the sheet-like member 27 is lowered in response to this lowering of the position. As a result, the sheet-like member 27 continues to contact the solid sensible heat storage material 16, and the amount of passing air 23 can be reduced.

[0177] Although several embodiments have been described above, these embodiments are presented only as examples and are not intended to limit the scope of the invention. The novel heat storage tank 1 described in this specification can be embodied in various other forms. In addition, various omissions, substitutions, and modifications can be made to the form of the heat storage tank 1 described in this specification without departing from the gist of the invention. The appended claims and their equivalents are intended to include such forms and modifications that fall within the scope and gist of the invention. [Explanation of symbols]

[0178] 1: heat storage tank, 2: electric heater, 3: first blower, 4: second blower, 5: air, 6: water, 7: steam, 8: condensate pump, 9: boiler, 10: steam turbine, 11: condenser, 12: valve, 13: valve, 14: valve, 15: valve, 16: solid sensible heat storage material, 17: lid, 18: plate-shaped member, 19: rod-shaped member, 20: plate-shaped member, 21: wool-shaped member, 22: ceiling air area, 23: passing air, 24: heat storage material built-in tank, 26: outer cover, 27: sheet-like member, 28: weight member, 30: hinge, 32: flap-shaped member, 33: corrugated plate-shaped member, 34: flexible member

Claims

1. A heat storage tank that stores heat from a fluid in a heat storage material during a heat storage operation and releases heat from the heat storage material to the fluid during a heat release operation, a heat storage material-containing tank containing the heat storage material; One or more gap flow path resistors that serve as resistance to the gap flow paths inside the heat storage material built-in tank; A lid portion is provided on the upper portion of the heat storage material, The gap flow path resistor changes the flow path of the fluid passing through the gap inside the heat storage material built-in tank during heat storage operation or heat release operation. Heat storage tank.

2. Further, an outer lid is provided on the top of the lid portion. The lid portion is placed on the upper part of the heat storage material without being fixed, and presses down the heat storage material by its own weight. The heat storage tank according to claim 1.

3. The one or more gap flow resistors are The device includes a first plate-like member that is flexible and extends downward in the vertical direction, a plurality of rod-like members that are flexible and extend downward in the vertical direction, or a second plate-like member that is not flexible and extends downward in the vertical direction, a gap provided between the lid and the heat storage material, for changing a flow path of the fluid passing through the gap in the upper part of the heat storage material-containing tank; The heat storage tank according to claim 1 or 2.

4. The heat storage tank according to claim 3 , wherein the gap flow path resistor is attached to the lid portion.

5. The one or more gap flow resistors are A wool-like member is included. a gap provided between the lid and the heat storage material, for changing a flow path of the fluid passing through the gap in the upper part of the heat storage material-containing tank; The heat storage tank according to claim 1 or 2.

6. The one or more gap flow resistors are A wool-like member is included. a gap between the bottom and the heat storage material, or between the side and the heat storage material, for changing a flow path of air passing through the gap in the bottom or the side of the heat storage material-built-in tank; The heat storage tank according to claim 1.

7. The one or more gap flow resistors are A flexible member is included. a gap provided between the lid and the heat storage material, for changing a flow path of the fluid passing through the gap in the upper part of the heat storage material-containing tank; The heat storage tank according to claim 1 or 2.

8. The one or more gap flow resistors are A flap-shaped member extending downward in a vertical direction, a heat storage material supply unit that is attached to the lid and that rotates when it comes into contact with the heat storage material when the lid is closed, and changes the flow path of the fluid passing through the gap in the upper part of the heat storage material built-in tank depending on the direction of rotation; The heat storage tank according to claim 1 or 2.

9. The gap flow path resistor is A corrugated member extending downward in a vertical direction, a flow path of the fluid passing through the gap in the upper part of the heat storage material-containing tank, the flow path being attached to the lid; The heat storage tank according to claim 1 or 2.

10. A heat storage tank that stores heat from a fluid in a heat storage material during a heat storage operation and releases heat from the heat storage material to the fluid during a heat release operation, a heat storage material-containing tank containing the heat storage material; A flexible sheet-like member placed on the heat storage material; A weight member placed on the sheet-like member; A lid portion is provided on the sheet-like member and the weight member, The sheet-like member suppresses the outflow of fluid into a gap in an upper portion of the heat storage material built-in tank during a heat storage operation or a heat dissipation operation. Heat storage tank.

11. A heat storage tank that stores heat from a fluid in a heat storage material during a heat storage operation and releases heat from the heat storage material to the fluid during a heat release operation, a heat storage material-containing tank containing the heat storage material; a plurality of gap flow resistances including a first gap flow resistance and a second gap flow resistance that provide resistance to the gap flow in the heat storage material built-in tank; A lid portion is provided on the upper portion of the heat storage material, the first gap flow path resistor and the second gap flow path resistor are each disposed horizontally with respect to the flow direction of the fluid, and change the flow path of the fluid passing through the gap inside the heat storage material built-in tank during a heat storage operation or a heat dissipation operation. Heat storage tank.

12. the first gap flow path resistor and the second gap flow path resistor are a first flap-shaped member and a second flap-shaped member, the first flap-like member and the second flap-like member rotate in opposite directions to a horizontal direction relative to a flow direction of the fluid; The heat storage tank according to claim 11.

13. the first gap flow resistance and the second gap flow resistance are a first row of gap flow resistance and a second row of gap flow resistance, which are divided in a direction perpendicular to the flow direction of the fluid, The first row of gap flow resistors and the second row of gap flow resistors are arranged horizontally with respect to a flow direction of the fluid. The heat storage tank according to claim 11.

14. each divided gap flow path resistor in the first row of gap flow path resistors and each divided gap flow path resistor in the second row of gap flow path resistors are arranged in a staggered arrangement. The heat storage tank according to claim 13.

Images