JP6422283B2 - Heat storage container and heat storage device provided with heat storage container - Google Patents

Description

  The present invention uses a chemical heat storage material capable of repeating heat generation and heat storage using a reversible reaction that releases reaction heat by a chemical reaction between a reaction gas and a chemical heat storage material and absorbs heat by the reverse reaction of the above reaction. The present invention relates to a heat storage device and a heat storage device including the heat storage device.

  Chemical heat storage materials are used for storing and using exhaust heat from engines, industrial plants, etc., because they have a large amount of heat storage per volume and have very little heat loss even after long-term storage of stored chemical heat storage materials. Is expected to be.

  Therefore, as shown in FIG. 8, the chemical heat storage material complex 53 is accommodated between the inner tube 51 and the outer tube 52, and is used as a reactant / reaction product associated with heat storage / heat dissipation of the chemical heat storage material complex 53. A reaction flow channel 54 through which water vapor flows is configured in the inner pipe 51, and a heat exchange flow channel 56 through which a gaseous fluid that is a heat exchange medium for exchanging heat with the chemical heat storage material complex 53 flows. A heat storage device 50 provided between the outer tube 52 and the outer wall 55 has been proposed (Patent Document 1). However, in the heat storage device 50 of Patent Document 1, it is necessary to separately provide the reaction flow path 54 for supplying water vapor and the heat exchange flow path 56 for supplying the heat exchange medium. It was. Further, since the amount of the chemical heat storage material composite 53 that can be mounted on the heat storage device 50 is reduced due to the complexity of the piping configuration, there is a problem that the amount of heat used (heat storage density) per unit volume of the heat storage device 50 is reduced. there were.

  In addition, in the heat storage device 50 of Patent Document 1, when a gaseous fluid is used as the heat exchange medium, only sensible heat can be supplied to the gaseous fluid, so that the heat transport amount of the heat exchange medium is limited. Furthermore, in order to supply the gaseous heat exchange medium to the heat storage device 50, it is necessary to input energy to the heat exchange medium storage container in order to prevent a temperature drop of the heat exchange medium storage container due to heat of vaporization. There was a problem that there was.

  Further, there has been proposed a heat accumulator that mixes water vapor as a reaction gas and normal temperature air (corresponding to a heat transport medium) and supplies the mixture to a reactor in which a heat accumulating material is accommodated (Patent Document 2). However, if steam is supplied to the regenerator in a state where it is mixed with room temperature air, the air will inhibit the diffusion of the water vapor and the reaction rate of the heat storage material will slow down. There was a problem that the amount of heat was reduced.

  Meanwhile, a reactor filled with alkaline earth metal oxide, a water tank for storing water, a water supply pipe for supplying water from the water tank to the reactor, and a reflux pipe for returning water from the reactor to the water tank There has been proposed a chemical exothermic apparatus that includes a closed cycle consisting of the above and uses heat generated by the hydration reaction of an alkaline earth metal oxide (Patent Document 3). However, when alkaline earth metal oxide, which is a heat storage material, reacts with water, the water that penetrates into the heat storage material expands suddenly and destroys the heat storage material when it vaporizes due to the heat generated by the heat storage material. was there.

JP 2009-228952 A Japanese Patent Laid-Open No. 62-216633 JP-A-7-180539

  The present invention has been made in view of the above-described problems of the prior art. With a simple configuration, the heat storage container capable of improving the efficiency of heat absorption and heat generation and the amount of heat transport, and preventing the destruction of the chemical heat storage material, and It aims at providing the thermal storage apparatus provided with the thermal storage container.

  An aspect of the present invention includes an outer tube having a cylindrical body having a closed side end portion closed at one end and an open end portion opened at the other end, and a closed side end portion of the outer tube An inner tube inserted into the outer tube such that one open end projects from the outer tube and the other open end is positioned closer to the closed end of the outer tube than the open end of the outer tube; The heat storage unit structure containing a chemical heat storage material housed in a first space formed between the inner surface of the outer tube and the outer surface of the inner tube, and the heat storage unit structure as the first And a first flow path penetrating in the longitudinal direction of the space portion.

  In the said aspect, the 1st flow path is a flow path of the vaporized material of the heat transport fluid having the function as a reaction gas that contributes to the endothermic reaction and exothermic reaction of the chemical heat storage material. Accordingly, the reaction gas flowing through the first flow path and the chemical heat storage material accommodated in the first space chemically react to release heat stored in the chemical heat storage material as reaction heat. On the other hand, a liquefied product of a heat transport fluid having a function as a reaction gas is supplied from one open end of the inner tube protruding from the closed end of the outer tube into the inner tube. The liquefied product of the heat transport fluid supplied to the inside of the inner pipe receives the reaction heat and vaporizes while flowing in the inner pipe from one opening end to the other opening end. The heat transport fluid vaporized inside the inner tube is supplied as a reaction gas from the other opening end of the inner tube to the first flow path. The reaction gas supplied to the first flow path flows from the opening side end side of the outer pipe toward the closing side end side of the outer pipe, and as described above, enters the first space part. Chemical reaction with the stored chemical heat storage material causes reaction heat to be released from the chemical heat storage material.

  Further, the excess vaporized heat transport fluid that was not used as the reaction gas, that is, not supplied to the first flow path from the other opening end of the inner tube, transported the heat of reaction. As a medium, it is transported from the opening side end of the outer tube to a heat utilization destination.

  On the other hand, heat outside the heat storage container can be transferred to the chemical heat storage material accommodated in the first space inside the outer pipe through the wall surface of the outer pipe of the heat storage container. The heat transferred to the inside of the outer tube causes a reaction in which the reaction gas is desorbed from the chemical heat storage material once bonded by a chemical reaction and releases the reaction heat, and the chemical heat storage material is heated to the inside of the outer tube. Stores the transferred heat. The reaction gas desorbed from the chemical heat storage material is released to the first flow path.

  In the aspect of the present invention, a wick structure and a second flow path penetrating the wick structure in the longitudinal direction of the second space portion are provided in the second space portion inside the inner tube. It is a heat storage container.

  In this aspect, the liquefied product of the heat transport fluid having a function as a reaction gas is supplied into the inner tube by the capillary force of the wick structure. The liquefied product of the heat transport fluid supplied to the inside of the inner tube is vaporized by receiving the heat of reaction inside the wick structure of the inner tube and is discharged from the wick structure to the second flow path. . The gaseous heat transport fluid released into the second flow path flows from the one opening end side of the inner pipe toward the other opening end side through the second flow path.

  An aspect of the present invention is a heat storage container in which a through hole is provided in a wall surface of the inner tube. An aspect of the present invention is a heat storage container in which a through hole is provided in a wall surface of the inner tube, and the wick structure is not provided in a portion of the through hole.

  In an aspect of the present invention, one open end portion of the inner tube protruding from the closed side end portion of the outer tube has a function as a reaction gas that contributes to an endothermic reaction and an exothermic reaction of the chemical heat storage material. It is the heat storage container connected with the heat transport fluid container in which the liquefied material of the transport fluid was accommodated.

  In an aspect of the present invention, one open end portion of the inner tube protruding from the closed side end portion of the outer tube has a function as a reaction gas that contributes to an endothermic reaction and an exothermic reaction of the chemical heat storage material. The heat storage container is connected to a heat transport fluid container in which a liquefied product of transport fluid is accommodated, and a bottom portion of the heat transport fluid container is located above one opening end of the inner tube. In this specification, “down” means the direction of gravity, and “up” means the direction opposite to the direction of gravity.

  In an aspect of the present invention, the heat storage unit structure containing the chemical heat storage material is a mixture of the chemical heat storage material and at least one selected from the group consisting of metal powder, clay minerals, organic carbides, and metal meshes. It is a heat storage container which is a sintered body of.

  An aspect of the present invention includes an outer tube having a cylindrical body having a closed side end portion closed at one end and an open end portion opened at the other end, and a closed side end portion of the outer tube An inner tube inserted into the outer tube such that one open end projects from the outer tube and the other open end is positioned closer to the closed end of the outer tube than the open end of the outer tube; The heat storage unit structure containing a chemical heat storage material housed in a first space formed between the inner surface of the outer tube and the outer surface of the inner tube, and the heat storage unit structure as the first A heat storage container comprising: a first flow path penetrating in a longitudinal direction of the space; and the chemical heat storage connected to one open end of the inner tube protruding from the closed end of the outer tube. A heat transport fluid container containing a liquefied product of a heat transport fluid having a function as a reaction gas contributing to an endothermic reaction and an exothermic reaction of the material, and the outer tube A condenser connected to the opening side end portion for liquefying the vaporized heat transport fluid discharged from the opening side end portion of the outer tube; and the heat transport fluid container and the condenser connected to each other, and the condenser And a piping system for supplying the liquefied product of the heat transport fluid obtained by the above to the heat transport fluid container, the heat transport fluid circulation system, wherein the circulation system is in an airtight state and is removed. It is a heat storage device that is concerned.

  An aspect of the present invention is a heat storage device in which a surface of the outer tube is thermally connected to a heat source.

  According to the aspect of the present invention, one open end projects from the closed end of the outer tube, and the other open end is closer to the closed end of the outer tube than the open end of the outer tube. The liquefied product of the heat transport fluid that also functions as a reaction gas that contributes to the endothermic reaction and exothermic reaction of the chemical heat storage material is supplied to the inside of the inner tube inserted into the outer tube. Since there is no need to separately provide the reaction gas flow path and the heat transport fluid flow path, a heat storage container having a simple configuration can be obtained. As described above, since the heat storage container can have a simple configuration, the amount of the heat storage unit structure mounted per unit volume of the heat storage container is increased, the efficiency of heat absorption and heat generation is improved, and heat storage as the heat storage container is achieved. The density can be increased.

  The liquid heat transport fluid is supplied to the inside of the inner tube, so that the liquid heat transport fluid is a chemical heat storage material accommodated in the reaction gas flowing through the first flow path and the first space. Since the reaction heat released by the chemical reaction with can be received not only as sensible heat but also as latent heat, the heat transport amount of the heat transport fluid is improved. Further, since the first space portion and the inner space of the inner tube are separated from each other via the wall surface of the inner tube, the heat storage unit structure housed in the first space portion is provided inside the inner tube. Can be prevented from contacting the liquid heat transport fluid supplied to the liquid, so that deterioration of the heat storage section structure is suppressed, and further, the liquid heat transport fluid permeating the heat storage section structure is vaporized and expanded. By doing, it can prevent that a thermal storage part structure is destroyed.

  According to the aspect of the present invention, since the wick structure is provided in the second space portion inside the inner tube, the liquefaction of the heat transport fluid having a function as the reaction gas by the capillary force of the wick structure. An object is smoothly supplied to the internal space of the inner tube, and the liquefied material of the heat transport fluid can be reliably flowed along the longitudinal direction of the inner tube by the capillary force. Further, since the second flow path penetrating the wick structure in the longitudinal direction of the second space is provided, the heat transport fluid vaporized inside the wick structure by the reaction heat is The vaporized heat transport fluid released to the flow channel and discharged to the second flow channel can prevent the supply amount from being insufficient when flowing to the first flow channel as the reaction gas.

  According to the aspect of the present invention, since the through hole is provided in the wall surface of the inner tube, the amount of the vaporized heat transport fluid discharged into the second flow path, that is, the supply of the reaction gas to the first flow path. It can be surely prevented that the amount is insufficient. Furthermore, according to the aspect of the present invention, since the wick structure is not provided in the portion of the through hole, it is possible to more reliably prevent the supply amount of the reaction gas to the first flow path from being insufficient.

  According to the aspect of the present invention, the bottom portion of the heat transport fluid container is located above the one open end of the inner pipe connected to the heat transport fluid container, and thus has a function as a reaction gas by the gravitational action. The liquefied product of the heat transport fluid can be supplied to the inner space of the inner tube.

  According to the aspect of the present invention, the circulation system of the heat transport fluid having a function as the reaction gas in the heat storage device is in a sealed state and further degassed so that the heat transport fluid is circulated. Even without using, the heat transport fluid can smoothly circulate in the heat storage device. Further, since the circulation system is in a sealed state and further deaerated, the vaporized heat transport fluid released to the second flow path can be smoothly supplied to the first flow path as a reaction gas. It can flow.

  Further, a heat transport fluid container containing a liquefied product of a heat transport fluid having a function as a reaction gas that contributes to an endothermic reaction and an exothermic reaction of the chemical heat storage material is connected to the inner tube, so that the heat transport fluid It is possible to prevent the temperature of the heat transport fluid container from decreasing due to the heat of vaporization, and to prevent the heat transport fluid container from being charged with energy for maintaining the temperature.

It is side surface sectional drawing of the thermal storage container which concerns on the example of 1st Embodiment of this invention. It is front sectional drawing of the thermal storage container which concerns on the example of 1st Embodiment of this invention. It is side surface sectional drawing of the usage example of the thermal storage container which concerns on 1st Embodiment of this invention. It is side surface sectional drawing of the thermal storage container which concerns on the 2nd Embodiment of this invention. It is front sectional drawing of the thermal storage container which concerns on the 2nd Example of this invention. It is side surface sectional drawing of the usage example of the thermal storage container which concerns on the 2nd Example of this invention. It is explanatory drawing of the thermal storage apparatus which concerns on the example of embodiment of this invention. It is explanatory drawing of the conventional heat storage apparatus.

  Below, the thermal storage container which concerns on the example of 1st Embodiment of this invention is demonstrated, using drawing. As shown in FIG. 1, the heat storage container 1 according to the first embodiment has a cylindrical shape having a closed side end 3 with one end closed and an open end 4 with the other end opened. One open end 6 protrudes from the outer tube 2 made of a body and the closed side end 3 of the outer tube 2, and the other open end 7 is blocked from the open side end 4 of the outer tube 2. And an inner tube 5 inserted into the outer tube 2 so as to be positioned on the side end 3 side. A through hole having a shape and a dimension corresponding to the outer shape of the inner tube 5 is formed in the closing side end portion 3 of the outer tube 2. By inserting and inserting the inner tube 5 into the through hole, the inner tube 5 is arranged and fixed inside the outer tube 2, and the closing end 3 of the outer tube 2 is sealed.

  As shown in FIG. 2, in the heat storage container 1, the outer tube 2 has a flat shape obtained by flattening a circular tube material, and the inner tube 5 is made of a circular tube material. In the heat storage container 1, the central axis of the outer tube 2 and the central axis of the inner tube 5 are arranged coaxially.

  As shown in FIGS. 1 and 2, a first space 8 is formed between the inner surface of the outer tube 2 and the outer surface of the inner tube 5, and the first space 8 contains a chemical heat storage material. A heat storage unit structure 9 is accommodated. The heat storage unit structure 9 is thermally connected to the outer tube 2 and the inner tube 5 by contacting the inner surface of the outer tube 2 and the outer surface of the inner tube 5. The heat storage unit structure 9 extends in a direction parallel to the longitudinal direction of the outer tube 2 and the inner tube 5 from the other open end 7 of the inner tube 5 or the vicinity thereof to the closed side end 3 of the outer tube 2. Yes.

  In addition, a first flow path 10 penetrating through the inside of the heat storage unit structure 9 is provided in the heat storage unit structure 9 in a direction parallel to the longitudinal direction of the first space 8. In the heat storage container 1, the first flow paths 10 are arranged one by one on the left and right of the inner tube 5. Although the shape of the 1st flow path 10 is not specifically limited, In the thermal storage container 1, the contact area of the reactive gas and the thermal storage part structure 9 which flow in the 1st flow path 10 is increased, and the thermal storage part structure 9 is increased. In order to improve the heat generation efficiency, it has a letter shape in front view. The ratio of the volume of the heat storage unit structure 9 and the volume of the first flow path 10 in the first space 8 is not particularly limited, but is 2: 1 to 20: 1 from the viewpoint of the balance between the heat storage density and the reaction rate. Is preferable, and 5: 1 to 15: 1 is particularly preferable.

  As shown in FIG. 1, a wick structure 12 is provided in the second space 11 inside the inner tube 5. The wick structure 12 extends in a direction parallel to the longitudinal direction of the second space portion 11 from one open end 6 of the inner tube 5 or the vicinity thereof to the other open end 7 or the vicinity thereof.

  As shown in FIG. 2, the wick structure 12 is provided so as to cover the inner peripheral surface of the inner tube 5. Further, the wick structure 12 is in contact with the inner peripheral surface of the inner tube 5, and can receive the reaction heat H released from the heat storage unit structure 9 containing the chemical heat storage material via the inner tube 5.

  Further, in the inner tube 5, the longitudinal direction of the second space 11 from the other open end 7 of the inner tube 5 or the vicinity thereof to a position corresponding to the closed end 3 of the outer tube 2 or the vicinity thereof. A second flow path 13 extending through the wick structure 12 extends. The reaction heat H released from the heat storage unit structure 9 is contained in the wick structure 12 by the wick structure 12 thermally connected to the heat storage unit structure 9 via the inner pipe 5. The liquefied product of the heat transport fluid having the function as the reaction gas is vaporized. The heat transport fluid having the function as the vaporized reaction gas (that is, the vapor of the heat transport fluid having the function as the reaction gas) G is discharged from the wick structure 12 to the second flow path 13. The second flow path 13 is open on the other opening end 7 side of the inner tube 5. The vaporized heat transport fluid G discharged to the second flow path 13 is discharged from the opening of the second flow path 13 to the vicinity of the opening side end 4 inside the outer tube 2.

  The ratio of the volume of the wick structure 12 and the volume of the second flow path 13 in the second space portion 11 is not particularly limited, but is 2: 1 to 1:10 in terms of supply efficiency of the heat transport fluid G. Is preferable, and 1: 1 to 1: 5 is particularly preferable. Moreover, the ratio of the volume of the first space 8 and the volume of the second space 11 is not particularly limited, but is 3: 1 to 20 in terms of the balance between the heat storage density and the supply efficiency of the heat transport fluid G. : 1 is preferred, and 5: 1 to 10: 1 is particularly preferred.

  The chemical reaction between the heat storage unit structure 9 and the reaction gas releases the reaction heat H, and the vapor pressure of the reaction gas in the first flow path 10 decreases. When the vapor pressure of the reaction gas in the first flow path 10 decreases, the vaporized heat transport fluid G discharged from the opening of the second flow path 13 to the vicinity of the opening end 4 inside the outer tube 2. Flows into the first flow path 10 as a reaction gas. Further, the other opening end 7 of the inner tube 5 is located closer to the closing side end 3 of the outer tube 2 than the opening side end 4 of the outer tube 2, that is, the opening side end 4 of the outer tube 2 is The heat transport fluid G vaporized inside the inner tube 5 is disposed from the other opening end 7 of the inner tube 5 by being arranged so as to protrude from the other opening end 7 of the inner tube 5. 1 is smoothly supplied as a reaction gas to one flow path 10.

  The second space portion 11 of the inner tube 5 has one open end of the inner tube 5 from a position corresponding to the closed end portion 3 of the outer tube 2 which is the closed end portion of the second flow path 13 or the vicinity thereof. The portion 6 is filled with the wick structure 12. Thereby, the wick structure 12 existing from the other open end 7 of the inner tube 5 or the vicinity thereof to a position corresponding to the closed side end 3 of the outer tube 2 or the vicinity thereof has a function as a reactive gas. The liquefied product of the heat transport fluid can be sufficiently supplied.

  Next, a specific example of a method for supplying a heat transport fluid having a function as a reaction gas to the heat storage container 1 according to the first embodiment will be described.

  As shown in FIG. 3, the liquefied product L of the heat transport fluid in which one open end 6 of the inner tube 5 protruding from the closed end 3 of the outer tube 2 has a function as a reaction gas is accommodated. By being connected to the heat transport fluid container 30, a heat transport fluid having a function as a reaction gas is supplied to the heat storage container 1. Specifically, one end of the first piping system 31 is connected to one open end 6 of the inner pipe 5, and the other end of the first piping system 31 is a heat transport fluid container. 30 is embedded in a liquefied product L of a heat transport fluid having a function as a reaction gas. Since the inside of the first piping system 31 is filled with the wick structure 32, the liquefied product L of the heat transport fluid stored in the heat transport fluid container 30 is first caused by the capillary force of the wick structure 32. To the piping system 31. The liquefied product L of the heat transport fluid supplied to the first piping system 31 is caused by the capillary force of the wick structure 32 within the wick structure 32 of the first piping system 31 from one end side to the other. It is transported to the end side and transported from one end of the first piping system 31 to the wick structure 12 of the inner pipe 5.

  The first piping system 31 is provided with a valve 33 in order to adjust the supply amount and supply timing of the liquefied product L of the heat transport fluid. A second piping system 34 is connected to the opening side end 4 of the outer tube 2, and the excess vaporized heat transport fluid G that has not been supplied to the first flow path 10 is the above reaction. As a heat transport medium for transporting the heat H, the heat is transported from the opening side end 4 of the outer tube 2 to a heat utilization destination (not shown) via the second piping system 34.

  Next, the operation of the heat storage container 1 will be described. When the heat storage container 1 is installed, for example, in the flow of a fluid that is a heat recovery target, the outer surface of the outer tube 2 receives heat from the fluid and recovers it. The heat recovered by the outer surface of the outer tube 2 from the fluid is transmitted to the heat storage unit structure 9 that is in contact with and thermally connected to the outer tube 2, and the chemical heat storage material included in the heat storage unit structure 9 The heat transferred to the substructure 9 is stored. The chemical heat storage material releases the reaction gas to the first flow path 10 when storing heat.

  On the other hand, the reaction gas existing in the first flow path 10 reacts with the heat storage unit structure 9 (chemical heat storage material that stores heat), whereby the heat stored in the heat storage unit structure 9 is changed to the reaction heat H. And is discharged from the heat storage unit structure 9. The reaction gas in the first flow path 10 and the heat storage unit structure 9 react to reduce the vapor pressure of the reaction gas in the first flow path 10, but according to the decrease in the vapor pressure of the reaction gas, Since the heat transport fluid having the function as the reaction gas is supplied as the new reaction gas from the second flow path 13 to the first flow path 10, the reaction heat H is released due to insufficient supply of the reaction gas. It can be prevented from being inhibited. The reaction heat H released from the heat storage unit structure 9 is transmitted to the liquefied product L of the heat transport fluid in the wick structure 12 via the inner pipe 5, and the liquefied product L of the heat transport fluid is transferred to the wick structure. 12 receives the reaction heat H and vaporizes. Among these, the surplus vaporized heat transport fluid G that has not been supplied as the reaction gas to the first flow path 10 is used as a heat medium for transporting the reaction heat H, that is, as heat transport fluid from the heat storage container 1. It is transported ahead.

  In addition, in order to improve the efficiency of receiving heat from the fluid that is the subject of heat recovery and recovering heat, fins that are heat exchange means may be attached to the outer surface of the outer tube 2.

The components of the heat storage unit structure 9 are not particularly limited. For example, a sintered body of a mixture of a chemical heat storage material and a metal powder, a sintered body of a mixture of a chemical heat storage material and a clay mineral, a mixture of a chemical heat storage material and a metal mesh. And a sintered body of a mixture of a carbide formed from a chemical heat storage material and an organic material. The chemical heat storage material and the reaction gas are not particularly limited, and any known materials can be used. For example, a combination of CaO and / or MgO which is a chemical heat storage material and H ₂ O which is a reaction gas, CaO and / or A combination of MgO and reactive gas CO ₂ can be used. The said metal powder is not specifically limited, For example, copper powder, aluminum powder, iron powder etc. can be mentioned. Moreover, the material of a metal mesh is not specifically limited, For example, copper, aluminum, iron, stainless steel, titanium etc. can be mentioned. A porous metal is obtained in the heat storage unit structure 9 by mixing and sintering the chemical heat storage material and the metal powder. The porous metal can efficiently disperse and carry the chemical heat storage material in the heat storage unit structure 9 while improving the heat transfer property of the heat storage unit structure 9, so that the heat storage property and heat release of the heat storage unit structure 9 can be achieved. Improves.

  The material of the outer tube 2 and the inner tube 5 is not particularly limited, and examples thereof include copper, aluminum, and stainless steel. Moreover, the material of the fin which is a heat exchange means is not specifically limited, For example, copper, aluminum, stainless steel etc. can be mentioned similarly.

  The wick structures 12 and 32 are not particularly limited as long as they have a capillary structure, and examples thereof include a member having a mesh, a wire, and the like.

  Next, the heat storage container 20 according to the second embodiment of the present invention will be described with reference to the drawings. In addition, about the same component as the thermal storage container 1, it demonstrates using the same code | symbol. As shown in FIGS. 4 and 5, in the heat storage container 20 according to the second embodiment, a plurality of through holes 21 are provided in the wall surface of the inner tube 5. The position and quantity of the through-holes 21 are not particularly limited. In the heat storage container 20, there are a total of 24 through-holes, 4 at regular intervals in the circumferential direction of the inner tube 5 and 6 at regular intervals in the longitudinal direction of the inner tube 5. 21 is provided in the inner pipe 5. The wick structure 12 is not provided in a portion corresponding to the position of each through hole 21.

  In addition, as shown in FIG. 5, a first flow path 10 that penetrates through the inside of the heat storage unit structure 9 in a direction parallel to the longitudinal direction of the first space 8 is provided inside the heat storage unit structure 9. Instead of the longitudinal direction penetrating the inside of the heat storage unit structure 9 in a direction parallel to the longitudinal direction of the first space portion 8 formed between the inner surface of the outer tube 2 and the outer surface of the inner tube 5. A third flow path 22 is provided that includes a flow path and a short-direction flow path that communicates each through hole 21 with the long-direction flow path.

  Accordingly, the heat transport fluid G having a function as a reaction gas vaporized inside the inner tube 5 is supplied as a reaction gas from the other open end 7 of the inner tube 5 to the third flow path 22. In addition, since the vaporized heat transport fluid G is discharged from the through hole 21 to the third flow path 22 provided inside the heat storage section structure 9, the vaporized heat storage section structure 9 is vaporized. It is possible to reliably prevent the discharge amount of the heat transport fluid G, that is, the supply amount of the reaction gas to the heat storage unit structure 9, from being insufficient.

  The ratio of the volume of the heat storage unit structure 9 and the volume of the third flow path 22 in the first space 8 is not particularly limited, but is 2: 1 to 20: 1 from the viewpoint of the balance between the heat storage density and the reaction rate. Is preferable, and 5: 1 to 15: 1 is particularly preferable. The ratio of the volume of the wick structure 12 and the volume of the second flow path 13 in the second space 11 inside the inner pipe 5 is not particularly limited, but from the viewpoint of the supply efficiency of the heat transport fluid G 2: 1 to 1:10 are preferable, and 1: 1 to 1: 5 are particularly preferable. Moreover, the ratio of the volume of the first space 8 and the volume of the second space 11 is not particularly limited, but is 3: 1 to 20 in terms of the balance between the heat storage density and the supply efficiency of the heat transport fluid G. : 1 is preferred, and 5: 1 to 10: 1 is particularly preferred.

  A method for supplying a heat transport fluid having a function as a reaction gas to the heat storage container 20 according to the second embodiment can be performed by the same method as that for the heat storage container 1.

  That is, as shown in FIG. 6, one open end 6 of the inner tube 5 protruding from the closed end 3 of the outer tube 2 accommodates a liquefied product L of a heat transport fluid having a function as a reaction gas. By being connected to the heat transport fluid container 30, a heat transport fluid having a function as a reaction gas is supplied to the heat storage container 20. Specifically, one end of a first piping system 31 filled with a wick structure 32 is connected to one open end 6 of the inner pipe 5. The other end is embedded in a liquefied product L of heat transport fluid having a function as a reaction gas accommodated in the heat transport fluid container 30.

  Next, the example of the manufacturing method of the thermal storage container of this invention is demonstrated. Although the manufacturing method is not particularly limited, for example, a through hole having a shape and a dimension corresponding to the outer shape of the inner tube is formed in the closed end portion of the outer tube, and the inner tube is fitted into the through hole to insert the outer tube. Place and fix the inner tube in the internal space. Next, the first space formed between the inner surface of the outer tube and the outer surface of the inner tube has a shape and a size corresponding to the shape and size of the first space, and the first flow portion A heat storage unit structure having a gap corresponding to the path or the third flow path is inserted. Next, in the second space inside the inner tube, the outer shape has a shape and size corresponding to the inner surface of the inner tube, and has a gap corresponding to the second flow path (through hole in the inner tube). When the wick structure is inserted, the space corresponding to the position of each through hole is also formed with a void portion communicating from each through hole to the second flow path). A heat storage container can be manufactured.

  Next, a heat storage device using the heat storage container of the present invention will be described with reference to the drawings.

  As shown in FIG. 7, the heat storage apparatus 100 according to the embodiment of the present invention has a plurality of heat storage containers 1 and 20 arranged in parallel. Each of the heat storage containers 1, 20 has a first piping system 31 in which one open end of the inner pipe 5 protruding from the closed end of the outer pipe 2 of the heat storage containers 1, 20 is filled with a wick structure. The heat transport fluid container 30 containing a liquefied product of the heat transport fluid having a function as a reaction gas that contributes to the endothermic reaction and the exothermic reaction of the chemical heat storage material is connected. The liquefied product of the heat transport fluid is transferred from the heat transport fluid container 30 to the inner tube 5 of the heat storage container 1, 20 by the capillary force of the wick structure of the heat storage container 1, 20 and the wick structure in the first piping system 31. Flows into the interior. The liquefied material of the heat transport fluid that has flowed into the inner pipe 5 of the heat storage containers 1, 20 is vaporized inside the inner pipe 5, and enters a first flow path formed between the inner pipe 5 and the outer pipe 2. It flows in and chemically reacts with the chemical heat storage material of the heat storage unit structure, and the chemical heat storage material releases reaction heat.

  The released reaction heat moves into a heat transport fluid having a function as a reaction gas newly flowing from the heat transport fluid container 30 into the inner pipe 5 of the heat storage container 1, 20. The heat transport fluid that has received the reaction heat is vaporized in the same manner as described above, and the surplus heat transport fluid that has not been used for the chemical reaction with the chemical heat storage material has a function as a reaction gas. The heat storage containers 1 and 20 are discharged to the second piping system 34.

  In each heat storage container 1, 20, the opening side end of the outer tube 2 has a function as a reaction gas discharged from the heat storage container 1, 20 through the second piping system 34, and is a heat transport fluid vapor. Is connected to a condenser 35 for liquefying the liquid. The vapor of the heat transport fluid that has been released to the second piping system 34 and has not been used for the chemical reaction moves in the second piping system 34 toward the condenser 35 and enters the condenser 35. be introduced.

  The vapor of the heat transport fluid introduced into the condenser 35 is condensed and liquefied and releases latent heat. The latent heat released by the condenser 35 is transported to a heat utilization destination (not shown) thermally connected to the condenser. Thus, in the heat storage device 100, the reaction gas is also used as a heat transport fluid for transporting the reaction heat released from the chemical heat storage material to the heat utilization destination. The heat utilization destination is not particularly limited, and examples thereof include an internal combustion engine and a heating device.

  Further, the heat storage device 100 connects the condenser 35 and the heat transport fluid container 30, and returns the liquefied product of the heat transport fluid having a function as a reaction gas obtained by the condenser 35 to the heat transport fluid container 30. 3 piping systems 36 are provided.

  The heat storage device 100 includes a first piping system 31, a second piping system 34, and a third piping system 36, respectively, from the heat transport fluid container 30 to the heat storage containers 1 and 20, and from the heat storage containers 1 and 20 to the condenser, respectively. 35, a circulation system in which the heat transport fluid circulates from the condenser 35 to the heat transport fluid container 30 is formed. The circulatory system is airtight and degassed.

  Accordingly, the capillary force for transporting the heat transport fluid of the wick structure provided in the first piping system 31 and the relatively high temperature without using a device for circulating the heat transport fluid. Using the temperature difference between the interior of a certain heat storage container 1, 20 and the condenser 35, which is relatively low temperature, and the vapor pressure difference of the heat transport fluid in the heat storage container 1, 20 and the condenser 35 as a driving force, the heat transport fluid Can circulate through the circulation system of the heat storage device 100.

  Although the usage method of the thermal storage apparatus 100 which concerns on the example of embodiment of this invention is not specifically limited, For example, as shown in FIG. 7, the thermal storage of the thermal storage apparatus 100 is connected to the exhaust pipe 40 connected to the internal combustion engine mounted in the vehicle. By mounting the containers 1 and 20, the heat in the exhaust gas 41 flowing through the exhaust pipe 40 can be stored in the heat storage containers 1 and 20. By arranging the heat storage containers 1 and 20 so that the outer surface of the outer pipe 2 of the heat storage containers 1 and 20 is in direct contact with the exhaust gas 41 flowing in the exhaust pipe 40, the heat storage containers 1 and 20 are thermally connected to the heat source. can do.

  In FIG. 7, in order to efficiently recover heat from the exhaust gas 41 flowing in the exhaust pipe 40, a plurality of fins 37 as heat exchange means are provided on the outer surface of the outer pipe 2 for each of the heat storage containers 1 and 20. It is attached. In addition, since the outer tube 2 of the heat storage containers 1 and 20 is flat, by arranging the heat storage containers 1 and 20 so that the flat portion of the flat shape is parallel to the flow direction of the exhaust gas 41, the flow of the exhaust gas 41 is Inhibition by the heat storage containers 1 and 20 can be suppressed.

  Next, another embodiment of the present invention will be described. In the heat storage container 1 according to the first embodiment, the wick structure 12 is provided inside the inner tube 5. However, instead of this, the wick structure 12 may not be provided. In this case, the bottom of the heat transport fluid container is installed above the heat storage container, and the liquefied product of the heat transport fluid having a function as a reaction gas is supplied from the heat transport fluid container to the heat storage container by the gravitational action. Is preferred. Moreover, in the thermal storage container 1 which is the first embodiment, the shape of the first flow path 10 is a square shape when viewed from the front, but instead, is a circular shape when viewed from the front and an elliptical shape when viewed from the front. The shape may be rectangular when viewed from the front, or may be wavy when viewed from the front in order to further increase the contact area between the reaction gas flowing in the first flow path 10 and the heat storage unit structure 9.

  In the heat storage containers 1 and 20 as the first and second embodiments, the outer tube 2 has a flat shape obtained by flattening a circular tube material, and the inner tube 5 is a circular tube material. The shapes of the tube and the inner tube are not particularly limited. Instead, for example, both the outer tube and the inner tube may be flat or circular, and the outer tube and / or the inner tube may be rectangular. In addition, in the heat storage container 20 according to the second embodiment, the wick structure 12 is not provided in a portion corresponding to the position of each through-hole 21, but instead of this, the through-hole 21 is used as necessary. It is good also as an aspect by which the wick structure 12 is provided also in the site | part corresponded to this position.

  With a simple configuration, it is possible to improve the efficiency of heat absorption and heat generation and the amount of heat transport, and it is possible to obtain a heat storage container and a heat storage device equipped with a heat storage container that can prevent the destruction of chemical heat storage materials. The utility value is high in the field of recovery, storage and use of exhaust heat from the vehicle, for example, the field of recovery, storage and use of exhaust heat mounted on a vehicle.

DESCRIPTION OF SYMBOLS 1, 20 Thermal storage container 2 Outer tube 5 Inner tube 9 Thermal storage part structure 10 1st flow path 12 Wick structure 13 2nd flow path 21 Through-hole 30 Heat transport fluid container 100 Thermal storage apparatus

Claims (8)

An outer tube made of a cylindrical body having a closed side end where one end is closed and an open side end where the other end is open, and one open end from the closed side end of the outer tube The inner tube inserted into the outer tube, and the inner surface of the outer tube so that the other opening end is located closer to the closing side end of the outer tube than the opening side end of the outer tube And a heat storage part structure containing a chemical heat storage material housed in a first space formed between the outer surface of the inner pipe and the heat storage part structure in the longitudinal direction of the first space A first flow path extending therethrough ,
A heat storage container in which a wick structure and a second flow path that penetrates the wick structure in a longitudinal direction of the second space are provided in a second space that is inside the inner pipe . The heat storage container according to claim 1 , wherein a through hole is provided in a wall surface of the inner tube. The heat storage container according to claim 1 , wherein a through hole is provided in a wall surface of the inner tube, and the wick structure is not provided in a portion of the through hole. A liquefied product of a heat transport fluid in which one open end of the inner tube protruding from the closed end of the outer tube has a function as a reaction gas contributing to an endothermic reaction and an exothermic reaction of the chemical heat storage material. The heat storage container according to any one of claims 1 to 3 , wherein the heat storage container is connected to a stored heat transport fluid container.   A liquefied product of a heat transport fluid in which one open end of the inner tube protruding from the closed end of the outer tube has a function as a reaction gas contributing to an endothermic reaction and an exothermic reaction of the chemical heat storage material. 2. The heat storage container according to claim 1, wherein the heat storage container is connected to the accommodated heat transport fluid container, and the bottom of the heat transport fluid container is located above one open end of the inner pipe. The heat storage unit structure containing the chemical heat storage material is a sintered body of a mixture of the chemical heat storage material and at least one selected from the group consisting of metal powder, clay minerals, organic carbides and metal meshes. The heat storage container according to any one of claims 1 to 5 . An outer tube made of a cylindrical body having a closed side end where one end is closed and an open side end where the other end is open, and one open end from the closed side end of the outer tube The inner tube inserted into the outer tube, and the inner surface of the outer tube so that the other opening end is located closer to the closing side end of the outer tube than the opening side end of the outer tube And a heat storage part structure containing a chemical heat storage material housed in a first space formed between the outer surface of the inner pipe and the heat storage part structure in the longitudinal direction of the first space A first flow path extending therethrough ,
A heat storage container in which a wick structure and a second flow path penetrating the wick structure in the longitudinal direction of the second space portion are provided in the second space portion that is inside the inner tube ;
A heat transport fluid having a function as a reaction gas that contributes to an endothermic reaction and an exothermic reaction of the chemical heat storage material, connected to one open end of the inner tube protruding from the closed end of the outer tube. A heat transport fluid container containing the liquefied material;
A condenser connected to the opening side end of the outer pipe and liquefying the vaporized heat transport fluid discharged from the opening side end of the outer pipe;
A piping system for connecting the heat transport fluid container and the condenser, and supplying a liquefied product of the heat transport fluid obtained by the condenser to the heat transport fluid container;
Comprising a circulation system of the heat transport fluid,
The heat storage device in which the circulation system is in an airtight state and is deaerated. The heat storage device according to claim 7 , wherein a surface of the outer tube is thermally connected to a heat source.

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