WO2016047121A1

WO2016047121A1 - Heat storage material, catalytic unit, and heat storage system

Info

Publication number: WO2016047121A1
Application number: PCT/JP2015/004762
Authority: WO
Inventors: 伸矢笠松; 卓哉布施; 欣河野
Original assignee: 株式会社デンソー
Priority date: 2014-09-26
Filing date: 2015-09-17
Publication date: 2016-03-31

Abstract

Provided is a heat storage material (5) that comprises a strongly correlated electron material and a porous material. Alternatively provided is a heat storage material (5) that comprises a strongly correlated electron material and has a porous shape. The strongly correlated electron material may undergo metal-insulator phase transition. The strongly correlated electron material may be a transition metal oxide. Also provided is a catalytic unit that comprises a catalyst support (17) which includes the heat storage material, and a catalyst supported on the catalyst support. Further provided is a heat storage system (19) that comprises a flow channel (35) for a heat transport medium, the heat storage material (25) mentioned above which exchanges heat with the heat transport medium (101) flowing through the flow channel, and steam supplying units (23, 27, 31) that supply steam to the heat storage material. According to the invention, a heat storage material with greater storage of heat, a catalytic unit, and a heat storage system can be provided.

Description

Thermal storage material, catalyst unit, and thermal storage system

Cross-reference of related applications

This application includes Japanese Patent Application No. 2014-196738 filed on September 26, 2014 and Japanese Patent Application No. 2014-2014 filed on September 26, 2014, the disclosures of which are incorporated herein by reference. Based on 196739.

The present disclosure relates to a heat storage material, a catalyst unit, and a heat storage system.

Conventionally, a heat storage material made of a substance that undergoes an electronic phase transition is known (see Patent Document 1). This heat storage material uses the enthalpy change accompanying the electronic phase transition for heat storage. The heat storage material described in Patent Document 1 sometimes has an insufficient amount of heat to be stored. Further, the heat storage material described in Patent Document 1 sometimes has low heat exchange efficiency when heat exchange is performed with the heat transport medium.

JP 2010-163510 A

This disclosure is intended to provide a heat storage material, a catalyst unit, and a heat storage system with a large amount of heat storage.

This disclosure has another object to provide a heat storage material, a catalyst unit, and a heat storage system with high heat exchange efficiency.

According to the first aspect of the present disclosure, the heat storage material includes a strongly correlated electron material and a porous material. According to this, the heat storage material can increase the heat storage amount.

According to the second aspect of the present disclosure, the heat storage material includes a strongly correlated electron material and has a porous shape. According to this, since the heat storage material has a porous shape, the contact area with the heat transport medium can be increased, and the heat exchange efficiency can be increased.

It is a schematic diagram showing the form of the heat storage material in 1st Embodiment of this indication. It is a schematic diagram showing the other form of the heat storage material in 1st Embodiment. It is a schematic diagram showing the other form of the heat storage material in 1st Embodiment. It is a schematic diagram showing the form of the catalyst carrier in 1st Embodiment. It is a schematic diagram showing the effect | action which the catalyst unit in 1st Embodiment show | plays. It is a block diagram which shows the whole system containing the catalyst system in 1st Embodiment. It is a mimetic diagram showing a catalyst system in the state where a valve is opened in a 1st embodiment. It is a mimetic diagram showing a catalyst system in the state where a valve is closed in a 1st embodiment. It is a schematic diagram showing the thermal storage material in 2nd Embodiment of this indication. It is a schematic diagram showing the form of the catalyst carrier in 2nd Embodiment. It is a schematic diagram showing the effect | action which the catalyst unit in 2nd Embodiment has. It is a block diagram which shows the whole system containing the catalyst system in 2nd Embodiment. It is a mimetic diagram showing a catalyst system in the state where a valve is opened in a 2nd embodiment. It is a mimetic diagram showing a catalyst system in the state where a valve in a 2nd embodiment is closed.

(First embodiment)
A first embodiment of the present disclosure will be described.

1. Thermal storage material 1-1. Strongly correlated electron material The heat storage material of the present disclosure includes a strongly correlated electron material. A strongly correlated electron material is a system in which at least one of the degrees of freedom of spin, orbital, and charge possessed by an electron is manifested by strong Coulomb repulsion between electrons. The manifested degrees of freedom of spin, orbital, and charge show large entropy changes accompanying the change in the number of states due to the order-disorder phase transition, respectively. Called the phase transition).

Examples of strongly correlated electron materials include those that undergo a metal-insulator phase transition. Examples of strongly correlated electron materials include transition metal oxides.

Specific examples of strongly correlated electron materials include, for example, V _(1-X) W _X O ₂ (0 ≦ X ≦ 0.0650), V _(1-X) Ta _X O ₂ (0 ≦ X ≦ 0. 117), V _(1-X) Nb _X O ₂ (0 ≦ X ≦ 0.115), V _(1-X) Ru _X O ₂ (0 ≦ X ≦ 0.150), V _(1-X) Mo _X O ₂ (0 ≦ X ≦ 0.161), V _(1-X) Re _X O ₂ (0 ≦ X ≦ 0.0964), LiMn ₂ O ₄ , LiVS ₂ , LiVO ₂ , NaNiO ₂ , LiRh ₂ O ₄ , V ₂ O ₃ , V ₄ O ₇ , V ₆ O ₁₁ , Ti ₄ O ₇ , SmBaFe ₂ O ₅ , EuBaFe ₂ O ₅ , GdBaFe ₂ O ₅ , TbBaFe ₂ O ₅ , DyBaFe ₂ O ₅ , HoBaFe ₂ O _{_{_{5, YBaFe 2 O 5, PrBaCo}}} 2 O 5.5, Dy _{_{_{aCo 2 O 5.54, HoBaCo 2 O}}} 5.48, and the like YBaCo ₂ O _5.49. All of these are metal-insulator phase transitions and are transition metal oxides.

1-2. Porous material The heat storage material of this indication contains a porous material. The porous material may be any of a microporous material, a mesoporous material, and a macroporous material. Examples of the porous material include zeolite, activated carbon, SiO ₂ porous material (for example, diatomaceous earth) and the like.

The specific surface area of the porous material may be 1 m ² / g or more. By being in this range, the effect of adsorbing vapor molecules to the porous material and storing latent heat of vaporization becomes more remarkable. The specific surface area is a value measured by the BET method.

The pore diameter in the porous material may be 0.1 nm or more. By being in this range, the effect of adsorbing vapor molecules to the porous material and storing latent heat of vaporization becomes more remarkable. The pore diameter can be calculated from the pore diameter measured in the SEM photograph or TEM photograph obtained by photographing the porous material.

1-3. Form of heat storage material Examples of the form of the strongly correlated electron material and the porous material in the heat storage material of the present disclosure include, for example, form A shown in FIG. 1, form B shown in FIG. 2, and FIG. There is Form C. In the form A, the islands 3 including the porous material are dispersed in the sea 1 including the strongly correlated electron material, and the islands 3 are unevenly distributed on the surface 7 side of the heat storage material 5. The sea 1 containing a strongly correlated electron material may be made of a strongly correlated electron material, or may contain other materials. Moreover, the island 3 containing a porous material may consist of a porous material, and may further contain another material.

The surface 7 where the islands are unevenly distributed may be a surface on the side where the heat storage material 5 receives heat from a heat transport medium or the like. The surface 7 on which the islands 3 are unevenly distributed may be one surface of the heat storage material 5 or a plurality of surfaces (for example, one surface of the heat storage material 5 and the opposite surface thereof). May be.

Further, in the heat storage material 5 of the form B, the islands 11 including the strongly correlated electron material are dispersed in the sea 9 including the porous material. The sea 9 containing a porous material may be made of a porous material or may contain other materials. Further, the island 11 including a strongly correlated electron material may be made of a strongly correlated electron material, or may further include other materials.

In the heat storage material 5 of form C, islands 15 containing a porous material are dispersed in the sea 13 containing a strongly correlated electron material. The sea 13 containing a strongly correlated electron material may be made of a strongly correlated electron material, or may contain other materials. Moreover, the island 15 containing a porous material may be made of a porous material, and may further contain other materials.

1-4. Composition ratio of heat storage material The weight ratio of the strongly correlated electron material in the heat storage material of the present disclosure may be 20 wt% or more. By being in this range, the amount of stored heat can be further increased. Further, the weight ratio of the porous material in the heat storage material of the present disclosure may be 90 wt% or less. By being in this range, the adsorption performance is further improved.

The heat storage material of the present disclosure may be composed of a strongly correlated electron material and a porous material, and may further include other materials.

1-5. Effects of heat storage materials Strongly correlated electronic materials have a large amount of heat storage per unit volume. Since the heat storage material of the present disclosure includes the strongly correlated electron material, the heat storage amount per unit volume is large.

Furthermore, the heat storage material of the present disclosure can adsorb vapor molecules to the porous material. At this time, latent heat of evaporation is generated, and the heat storage material of the present disclosure can also store the latent heat of evaporation. Therefore, the heat storage material of the present disclosure can store more heat when storing heat in an environment containing steam.

Also, the heat storage material of the present disclosure can desorb vapor molecules adsorbed on the porous material from the porous material. At this time, latent heat of vaporization is taken from the heat storage material, and the heat storage material is cooled.

2. Catalyst unit 2-1. Catalyst carrier The catalyst unit of this indication has a catalyst carrier containing the heat storage material mentioned above. The catalyst carrier may be made of a heat storage material, and may further contain other materials. The shape of the catalyst carrier can be, for example, a honeycomb-shaped catalyst carrier 17 shown in FIG.

2-2. Catalyst The catalyst unit of the present disclosure includes a catalyst supported on the catalyst carrier described above. The type of the catalyst is not particularly limited, and can be appropriately selected from known catalysts (for example, Pt, Pd, Rh, etc.). The catalyst can be supported on the surface of the catalyst carrier by a method such as a wash coat method.

2-3. Effect of catalyst unit Since the catalyst unit of the present disclosure has a catalyst carrier including a heat storage material, a temperature change is mitigated. Therefore, the catalytic reaction can be performed stably.

Further, since the heat storage material includes a porous material, latent heat of vaporization can be stored as described above. Therefore, the temperature of the catalyst carrier including the heat storage material and the catalyst supported thereon are further increased, and as a result, the catalytic reaction in the catalyst unit is further promoted.

2-4. Use of catalyst unit The catalyst unit of the present disclosure can be used for various purposes, for example, for use in purifying exhaust gas of an internal combustion engine (eg, gasoline engine, diesel engine, etc.). When used for the purpose of purifying exhaust gas, as shown in FIG. 5, CO, CH, NOx, etc. in the exhaust gas can be purified by the catalyst supported on the catalyst carrier 17. Moreover, when using for the use which purify | cleans waste gas, the vapor | steam molecule | numerator contained in waste gas adsorb | sucks to the pore in the porous material contained in a thermal storage material. As a result, the temperature of the catalyst carrier and the catalyst supported thereon is further increased, and the catalytic reaction for purifying the exhaust gas is further promoted.

3. Thermal storage system 3-1. Flow path of heat transport medium The heat storage system of the present disclosure includes a flow path of a heat transport medium. Examples of the flow path include hollow pipes. Examples of the heat transport medium include exhaust gas discharged from the energy converter, or a cooling medium used for cooling the energy converter. Examples of the energy converter include an internal combustion engine and a fuel cell. The cooling medium may be a liquid (for example, water, alcohol, oil, organic solvent, etc.) or a gas (for example, air, nitrogen gas, rare gas, etc.).

3-2. Thermal storage material The thermal storage system of this indication is provided with the thermal storage material which performs heat exchange with the heat transport medium which flows through a channel. The heat storage material is as described above. The heat storage material can be brought into contact with at least a part of the outer peripheral surface of the flow path, for example. Further, the heat storage material may exchange heat with the heat transport medium via another member (for example, a member having a higher thermal conductivity than the heat storage material). The heat exchange may store heat of the heat transport medium in the heat storage material, or may release heat stored in the heat storage material to the heat transport medium.

3-3. Steam supply unit The heat storage system of this indication is provided with the steam supply unit which supplies steam to heat storage material. When steam is supplied to the heat storage material by the steam supply unit and vapor molecules are adsorbed to the porous material contained in the heat storage material, latent heat of evaporation is generated. Therefore, the heat storage system of the present disclosure can store latent heat of vaporization in the heat storage material. Moreover, the heat storage system of this indication can discharge | release the evaporation latent heat stored in the heat storage material to a heat transport medium.

3-4. Effect of heat storage system The heat storage material provided in the heat storage system of the present disclosure includes a strongly correlated electron material and a porous material. Therefore, the heat storage system of the present disclosure can accumulate more heat of the heat transport medium and can release more heat to the heat transport medium.

The heat storage system of the present disclosure includes a steam supply unit that supplies steam to the heat storage material. As described above, the heat storage system of the present disclosure can store latent heat of vaporization in the heat storage material by the steam supply unit. Therefore, the heat storage system of the present disclosure can release more heat to the heat transport medium.

(Example 1)
First, VO ₂ powder was filled in the lower part of the jig. Thereafter, a mixed powder of zeolite powder and VO ₂ powder was filled in the upper part of the jig. The specific surface area of the zeolite powder is 350 m ² / g. Next, it sintered using the method of the hot press, and manufactured the heat storage material of the form A shown in FIG.

Incidentally, in the manufacturing the heat storage material, the part comprising the mixed powder of zeolite powder and the VO ₂ powder, an island that contains a porous material (zeolite) is dispersed portion.

VO ₂ powder is an example of a strongly correlated electron material. Zeolite powder is an example of a porous material. Instead of the VO ₂ powder, other strongly correlated electron materials may be used. In addition, other porous materials may be used in place of the zeolite powder. Further, instead of the hot pressing method, sintering may be performed by a method such as discharge plasma sintering (SPS) or hot isostatic pressing (HIP).

(Example 2)
A mixed powder of zeolite powder and VO ₂ powder was filled in a jig. At this time, the weight of the zeolite powder was larger than the weight of the VO ₂ powder. The specific surface area of the zeolite powder is 350 m ² / g. Next, it sintered using the method of the hot press, and manufactured the thermal storage material of the form B shown in FIG.

Instead of the VO ₂ powder, other strongly correlated electron materials may be used. In addition, other porous materials may be used in place of the zeolite powder. Further, instead of the hot pressing method, sintering may be performed by a method such as discharge plasma sintering (SPS) or hot isostatic pressing (HIP).

(Example 3)
A mixed powder of zeolite powder and VO ₂ powder was filled in a jig. At this time, the weight of the zeolite powder was less than the weight of the VO ₂ powder. The specific surface area of the zeolite powder is 350 m ² / g. Next, it sintered using the method of the hot press, and manufactured the thermal storage material of the form C shown in FIG.

Example 4
(A) Configuration of Heat Storage System 19 The configuration of the heat storage system 19 will be described with reference to FIGS. As shown in FIG. 6, the exhaust gas 101 discharged from the energy converter 21 passes through the heat storage system 19. The energy converter 21 is an internal combustion engine or a fuel cell. The exhaust gas 101 is an example of a heat transport medium.

If the temperature of the exhaust gas 101 passing through the heat storage system 19 is high, the heat storage system 19 stores the heat of the exhaust gas 101. If the temperature of the exhaust gas 101 is low, the heat storage system 19 releases the heat that has been stored up to that time to the exhaust gas 101 and raises the temperature of the exhaust gas 101.

When the temperature of the exhaust gas 101 rises, the energy converter 21 can be warmed up quickly. Further, when the temperature of the exhaust gas 101 is increased, the catalytic reaction for purifying the exhaust gas 101 can be promoted.

7 and 8, the heat storage system 19 includes a hollow container 23, a heat storage material 25 and water 27 accommodated therein. The container 23 is provided with a narrow constricted passage 29 in the center thereof. A valve 31 that can be opened and closed is provided in the passage 29. As shown in FIG. 7, the valve 31 can realize either a state in which the passage 29 is opened or a state in which the passage 29 is closed as shown in FIG. 8. The valve 31 may be manually operated by the user, or may be automatically operated in accordance with a control unit provided in the heat storage system 19 or an external command.

The heat storage material 25 exists above the passage 29 in the container 23. The heat storage material 25 is supported by a mesh-like support plate 33 so as not to fall downward. The heat storage material 25 is manufactured in the first embodiment. Further, the heat storage material 25 may be manufactured in the second embodiment or the third embodiment. The water 27 exists below the passage 29 in the container 23.

A medium flow path 35 penetrating the container 23 in the lateral direction is provided above the container 23. The medium flow path 35 and the inside of the container 23 are separated by the outer wall 37 of the container 23 and are not in communication. The heat storage material 25 is disposed around the medium flow path 35. The medium flow path 35 is a flow path for the exhaust gas 101.

Further, below the container 23, an air flow path 39 penetrating the container 23 in the lateral direction is provided. The air flow path 39 and the inside of the container 23 are separated by the outer wall 37 of the container 23 and are not in communication. The water 27 exists around the air flow path 39. The air flow path 39 is a flow path of the air 103 for cooling the water 27.

The container 23, the water 27, and the valve 31 are an example of a steam supply unit that supplies steam (water vapor) to the heat storage material 25.

(B) Process performed by the heat storage system 19 (b-1) Heat storage heat When the temperature of the exhaust gas 101 is high, the heat of the exhaust gas 101 is stored in the heat storage material 25. At this time, the valve 31 is opened as shown in FIG. When the temperature of the heat storage material 25 rises due to the heat storage, the water vapor adsorbed on the heat storage material 25 by the first heat radiation process described later evaporates and passes through the passage 29 and moves below the container 23. Then, it contacts the water 27 cooled by the air 103 and condenses. As described above, the heat storage material 25 is regenerated by removing the water vapor from the heat storage material 25.

(B-2) First Heat Dissipation Process In the first heat release process, the valve 31 is opened as shown in FIG. When the temperature of the exhaust gas 101 is low, the heat storage material 25 releases the heat stored up to that time to the exhaust gas 101. Further, the water vapor evaporated from the water 27 is adsorbed to the porous material included in the heat storage material 25. Thereby, the latent heat of vaporization is stored in the heat storage material 25. The heat storage material 25 also releases its latent heat of vaporization to the exhaust gas 101.

When the water vapor evaporates from the water 27, latent heat of vaporization is removed from the water 27, and the water 27 is cooled. Therefore, the air 103 is cooled by the water 27.

In addition, the heat storage system 19 can select and perform one of a 1st heat dissipation process and the 2nd heat dissipation process mentioned later.

(B-3) Second Heat Dissipation Process In the second heat dissipation process, the valve 31 is closed as shown in FIG. When the temperature of the exhaust gas 101 is low, the heat storage material 25 releases the heat stored up to that time to the exhaust gas 101. Since the valve 31 is in a closed state, the water vapor evaporated from the water 27 is not adsorbed by the porous material included in the heat storage material 25.

As mentioned above, although embodiment of this indication was described, this indication can take various forms, without being limited to the above-mentioned embodiment.

In the fourth embodiment, the heat storage system 19 stores heat of cooling water (an example of a cooling medium) used for cooling the energy converter 21 instead of the exhaust gas 101, and releases the stored heat to the cooling water. Also good. In this case, the temperature of the cooling water can be stabilized so that it does not decrease excessively. Therefore, warming up of the energy converter 21 can be performed quickly.

The functions of one component in the above embodiment may be distributed as a plurality of components, or the functions of a plurality of components may be integrated into one component. Further, at least a part of the configuration of the above embodiment may be replaced with a known configuration having the same function. Moreover, you may abbreviate | omit a part of structure of the said embodiment. In addition, at least a part of the configuration of the above embodiment may be added to or replaced with the configuration of the other embodiment. In addition, all the aspects included in the technical idea specified only by the wording described in the claims are embodiments of the present disclosure.
In addition to the heat storage material described above, the present disclosure can be realized in various forms such as a heat storage method, an exhaust gas purification method, a heat exchange method, and the like.
(Second Embodiment)
A second embodiment of the present disclosure will be described.

1-2. Porous shape The heat storage material of the present disclosure has a porous shape. For example, as shown in FIG. 9, the porous shape is a shape in which a large number of pores 6 exist inside the heat storage material 5. The porous shape may be any of microporous, mesoporous, and macroporous. The pores may be continuous vents or closed pores.

The pore diameter of the pores constituting the porous shape may be 0.1 nm or more. By being in this range, the effect of adsorbing vapor molecules and storing latent heat of vaporization becomes even more remarkable. The pore diameter can be calculated from the pore diameter measured in the SEM photograph or TEM photograph obtained by photographing the porous shape of the heat storage material.

The ratio of the volume occupied by the pores in the heat storage material may be greater than 0 vol% and 80 vol% or less. By being in this range, the heat storage amount and strength are further improved.

The heat storage material may have a porous shape throughout, or a part thereof may have a porous shape. In the portion having a porous shape, the size of the pores, the number density of the pores, etc. may be uniform or may vary depending on the location.

1-3. Effects of heat storage materials Strongly correlated electronic materials have a large amount of heat storage per unit volume. Since the heat storage material of the present disclosure includes the strongly correlated electron material, the heat storage amount per unit volume is large.

Furthermore, the heat storage material of the present disclosure has a porous shape and can adsorb vapor molecules to the pores constituting the porous shape. At this time, latent heat of evaporation is generated, and the heat storage material of the present disclosure can also store the latent heat of evaporation. Therefore, the heat storage material of the present disclosure can store more heat when storing heat in an environment containing steam.

Further, the heat storage material of the present disclosure can desorb vapor molecules adsorbed in the pores. At this time, latent heat of vaporization is taken from the heat storage material, and the heat storage material is cooled.

Moreover, since the heat storage material of the present disclosure has a porous shape, the specific surface area is large. Therefore, the heat storage material of the present disclosure has high heat exchange efficiency.

Further, since the heat storage material has a porous shape, latent heat of vaporization can be stored as described above. Therefore, the temperature of the catalyst carrier including the heat storage material and the catalyst supported thereon are further increased, and as a result, the catalytic reaction in the catalyst unit is further promoted.

2-4. Use of catalyst unit The catalyst unit of the present disclosure can be used for various purposes, for example, for use in purifying exhaust gas of an internal combustion engine (eg, gasoline engine, diesel engine, etc.). When used for the purpose of purifying exhaust gas, for example, as shown in FIG. 11, CO, CH, NOx, etc. in the exhaust gas can be purified by the catalyst supported on the catalyst carrier 17. Moreover, when using for the use which purifies exhaust gas, the vapor | steam molecule | numerator contained in exhaust gas is adsorb | sucked by the pore which comprises the porous shape of a thermal storage material. As a result, the temperature of the catalyst carrier and the catalyst supported thereon is further increased, and the catalytic reaction for purifying the exhaust gas is further promoted.

3. Thermal storage system 3-1. Flow path of heat transport medium The heat storage system of this indication is provided with the flow path of a heat transport medium. Examples of the flow path include hollow pipes. Examples of the heat transport medium include exhaust gas discharged from the energy converter, or a cooling medium used for cooling the energy converter. Examples of the energy converter include an internal combustion engine and a fuel cell. The cooling medium may be a liquid (for example, water, alcohol, oil, organic solvent, etc.) or a gas (for example, air, nitrogen gas, rare gas, etc.).

3-3. Steam supply unit The heat storage system of this indication is provided with the steam supply unit which supplies steam to heat storage material. When steam is supplied to the heat storage material by the steam supply unit and the vapor molecules are adsorbed to the pores constituting the porous shape of the heat storage material, latent heat of evaporation is generated. Therefore, the heat storage system of the present disclosure can store latent heat of vaporization in the heat storage material. Moreover, the heat storage system of this indication can discharge | release the evaporation latent heat stored in the heat storage material to a heat transport medium.

3-4. Effect of heat storage system The heat storage material provided in the heat storage system of the present disclosure has a porous shape. Therefore, the heat storage system of the present disclosure can accumulate more heat of the heat transport medium and can release more heat to the heat transport medium.

(Example 5)
A predetermined amount of V ₂ O ₅ and oxalic acid was placed in an autoclave and hydrothermally synthesized. As a result, a heat storage material having a porous shape could be manufactured. This heat storage material contains VO ₂ as a strongly correlated electron material.

(Example 6)
VO ₂ was supported on cellulose and heated. At this time, cellulose functions as a mold. By the above manufacturing method, a heat storage material made of VO ₂ and having a porous shape could be manufactured.

(Example 7)
(A) Configuration of Heat Storage System 19 The configuration of the heat storage system 19 will be described with reference to FIGS. As shown in FIG. 12, the exhaust gas 101 discharged from the energy converter 21 passes through the heat storage system 19. The energy converter 21 is an internal combustion engine or a fuel cell. The exhaust gas 101 is an example of a heat transport medium.

As shown in FIGS. 13 and 14, the heat storage system 19 includes a hollow container 23, a heat storage material 25 and water 27 accommodated therein. The container 23 is provided with a narrow constricted passage 29 in the center thereof. A valve 31 that can be opened and closed is provided in the passage 29. As shown in FIG. 13, the valve 31 can realize either a state in which the passage 29 is opened or a state in which the passage 29 is closed as shown in FIG. 14. The valve 31 may be manually operated by the user, or may be automatically operated in accordance with a control unit provided in the heat storage system 19 or an external command.

The heat storage material 25 exists above the passage 29 in the container 23. The heat storage material 25 is supported by a mesh-like support plate 33 so as not to fall downward. The heat storage material 25 is manufactured in the fifth embodiment. Further, the heat storage material 25 may be manufactured in the sixth embodiment. The water 27 exists below the passage 29 in the container 23.

(B) Process performed by the heat storage system 19 (b-1) Heat storage heat When the temperature of the exhaust gas 101 is high, the heat of the exhaust gas 101 is stored in the heat storage material 25. At this time, the valve 31 is in an open state as shown in FIG. When the temperature of the heat storage material 25 rises due to the heat storage, the water vapor adsorbed on the heat storage material 25 by the first heat radiation process described later evaporates and passes through the passage 29 and moves below the container 23. Then, it contacts the water 27 cooled by the air 103 and condenses. As described above, the heat storage material 25 is regenerated by removing the water vapor from the heat storage material 25.

(B-2) First Heat Dissipation Process In the first heat release process, the valve 31 is opened as shown in FIG. When the temperature of the exhaust gas 101 is low, the heat storage material 25 releases the heat stored up to that time to the exhaust gas 101. Further, the water vapor evaporated from the water 27 is adsorbed to the pores constituting the porous shape of the heat storage material 25. Thereby, the latent heat of vaporization is stored in the heat storage material 25. The heat storage material 25 also releases its latent heat of vaporization to the exhaust gas 101.

(B-3) Second Heat Dissipation Process In the second heat dissipation process, the valve 31 is closed as shown in FIG. When the temperature of the exhaust gas 101 is low, the heat storage material 25 releases the heat stored up to that time to the exhaust gas 101. Since the valve 31 is in a closed state, the water vapor evaporated from the water 27 is not adsorbed by the heat storage material 25.

In the seventh embodiment, the heat storage system 19 stores heat of cooling water (an example of a cooling medium) used for cooling the energy converter 21 instead of the exhaust gas 101, and releases the stored heat to the cooling water. Also good. In this case, the temperature of the cooling water can be stabilized so that it does not decrease excessively. Therefore, warming up of the energy converter 21 can be performed quickly.

The functions of one component in the above embodiment may be distributed as a plurality of components, or the functions of a plurality of components may be integrated into one component. Further, at least a part of the configuration of the above embodiment may be replaced with a known configuration having the same function. Moreover, you may abbreviate | omit a part of structure of the said embodiment. In addition, at least a part of the configuration of the above embodiment may be added to or replaced with the configuration of the other embodiment. In addition, all the aspects included in the technical idea specified only by the wording described in the claims are embodiments of the present disclosure.

In addition to the heat storage material described above, the present disclosure can be realized in various forms such as a heat storage method, an exhaust gas purification method, a heat exchange method, and the like.

Claims

A heat storage material (5) including a strongly correlated electron material and a porous material.
The heat storage material according to claim 1,
A heat storage material in which the strongly correlated electron system material undergoes a metal-insulator phase transition.
The heat storage material according to claim 1 or 2,
A heat storage material in which the strongly correlated electron material is a transition metal oxide.
The heat storage material according to any one of claims 1 to 3,
The heat storage material whose specific surface area of the said porous material is 1 m < 2 > / g or more.
A catalyst carrier (17) comprising the heat storage material according to any one of claims 1 to 4;
A catalyst supported on the catalyst carrier;
A catalyst unit comprising:
A heat transport medium flow path (35);
The heat storage material (25) according to any one of claims 1 to 4, which performs heat exchange with a heat transport medium (101) flowing through the flow path,
A steam supply unit (23, 27, 31) for supplying steam to the heat storage material;
A heat storage system (19) comprising:
The heat storage system according to claim 6,
The heat transport medium is a heat storage system which is an exhaust gas (101) discharged from an energy converter (21) or a cooling medium used for cooling the energy converter.
A heat storage material (5) containing a strongly correlated electron material and having a porous shape.
The heat storage material according to claim 8,
A heat storage material in which the strongly correlated electron system material undergoes a metal-insulator phase transition.
The heat storage material according to claim 8 or 9,
A heat storage material in which the strongly correlated electron material is a transition metal oxide.
The heat storage material according to any one of claims 8 to 10,
A heat storage material in which the pores (6) constituting the porous shape are communication pores or closed pores.
A catalyst carrier (17) comprising the heat storage material according to any one of claims 8 to 11;
A catalyst supported on the catalyst carrier;
A catalyst unit comprising:
A heat transport medium flow path (35);
The heat storage material (25) according to any one of claims 8 to 11, which exchanges heat with a heat transport medium (101) flowing through the flow path,
A steam supply unit (23, 27, 31) for supplying steam to the heat storage material;
A heat storage system (19) comprising:
The heat storage system according to claim 13,
The heat transport medium is a heat storage system which is an exhaust gas (101) discharged from an energy converter (21) or a cooling medium used for cooling the energy converter.