JPWO2016059981A1 - Chemical heat storage device - Google Patents

Abstract

A chemical heat storage device capable of diffusing a reaction medium throughout the heat storage material is provided. It is a chemical heat storage device that heats the object 8 to be heated, and includes a heat storage material 11c that reversibly generates heat due to a chemical reaction with the reaction medium and desorption of the reaction medium due to heat storage, and an elastic material having springback properties (for example, A heater 11 in which a molded body 11b containing a fibrous substance 11d) is accommodated in a case 11a, a reservoir for storing the reaction medium, and a connecting pipe for circulating the reaction medium between the heater 11 and the reservoir. The molded body 11b is a press-molded body of a mixture of the heat storage material 11c and an elastic material, and the elastic material has a Young's modulus of 50 GPa or more. .

Description

  The present invention relates to a chemical heat storage device.

  As a chemical heat storage device, for example, in Patent Document 1, a heater in which a heat storage material is housed in a case is disposed on the outer peripheral portion of an oxidation catalyst provided in an exhaust pipe, and is heated from a reservoir that stores ammonia as a reaction medium. It is disclosed that by supplying ammonia to the vessel, the heat storage material and ammonia are chemically reacted (chemical adsorption), and the oxidation catalyst is heated by the heat generated during the chemical reaction.

JP 2013-234625 A

  In order to fully exhibit the performance as a heater, it is necessary to diffuse the reaction medium throughout the heat storage material accommodated in the case. However, since the heat storage material has a property of expanding when it chemically reacts with the reaction medium, there is a problem that diffusion of the reaction medium is hindered as the heat storage material expands. In addition, when the heat storage material accommodated in the case is formed into a high-density press-molded body for the purpose of increasing the amount of heat mounted on the heater, the reaction medium is difficult to diffuse toward the inside of the high-density molded body. As a result, there is a problem that the heat storage material cannot be sufficiently reacted with the reaction medium.

  Therefore, in this technical field, there is a demand for a chemical heat storage device that can diffuse the reaction medium throughout the heat storage material.

  A chemical heat storage device according to an aspect of the present invention is a chemical heat storage device that heats an object to be heated, and a heat storage material that reversibly generates heat due to a chemical reaction with the reaction medium and desorption of the reaction medium due to heat storage. A heater containing a molded body containing an elastic material having springback properties in a case, a reservoir for storing the reaction medium, and a connecting pipe for circulating the reaction medium between the heater and the reservoir; The molded body is a press-molded body made of a mixture of a heat storage material and an elastic material, and the elastic material has a Young's modulus of 50 GPa or more.

  When a molded body is formed by press molding, an elastic material having springback properties is bent in the molded body surrounded by the heat storage material. Since the elastic material has a Young's modulus of 50 Gpa [Giga Pascal] or more, it tends to return from the bent state (elastically deformed state) to the original state due to the spring back property. In the process of the elastic material returning to its original state (springing back), the elastic material pushes back a part of the heat storage material particles, so that a void is formed around the elastic material in the molded body. For this reason, many voids are scattered inside and on the surface of the molded body. A space formed by the springback of the elastic material becomes a flow path for the reaction medium, and the reaction medium can be diffused throughout the heat storage material.

  In the chemical heat storage device of one embodiment, the elastic material is a fibrous material having a length of 10 μm to 5000 μm and an aspect ratio (= length / diameter) of 5 or more. By using a fibrous substance having such a size as an elastic material, voids formed inside or on the surface of the molded body by the elastic material have an appropriate size as a flow path for the reaction medium.

  According to the present invention, the reaction medium can be diffused throughout the heat storage material.

FIG. 1 is a schematic configuration diagram of an exhaust gas purification system including a chemical heat storage device according to an embodiment. FIG. 2 is a side sectional view of a part of the laminated structure shown in FIG. 3 is an enlarged view of a portion A in FIG. 2, (a) is a state where the fibrous substance is bent, and (b) is a state where a void is formed around the fibrous substance.

  Hereinafter, a chemical heat storage device according to an embodiment of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected about the element which is the same or it corresponds in each figure, and the overlapping description is abbreviate | omitted.

  A chemical heat storage device according to an embodiment is applied to a chemical heat storage device provided in an exhaust gas purification system provided in an exhaust system of a vehicle engine. An exhaust gas purification system according to an embodiment is a system that purifies harmful substances (environmental pollutants) contained in exhaust gas discharged from an engine (particularly a diesel engine), and is a catalyst DOC [Diesel Oxidation Catalyst]. SCR [Selective Catalytic Reduction], ASC [Ammonia Slip Catalyst], and DPF [Diesel Particulate Filter]. The exhaust gas purification system according to one embodiment also includes a chemical heat storage device for warm-up.

  With reference to FIG. 1, the whole structure of the exhaust-gas purification system 1 which concerns on one Embodiment is demonstrated. FIG. 1 is a schematic configuration diagram of an exhaust gas purification system 1 according to an embodiment.

  The exhaust gas purification system 1 includes a diesel oxidation catalyst (DOC) 4, a diesel exhaust particulate removal filter (DPF) 5, a selective reduction catalyst from the upstream side to the downstream side of the exhaust pipe 3 connected to the exhaust side of the engine 2. (SCR) 6 and ammonia slip catalyst (ASC) 7 are provided. Each portion where these DOC4, DPF5, SCR6, and ASC7 are disposed is larger than the diameter of the exhaust pipe 3 where the portions are not disposed. Exhaust gas discharged from the engine 2 flows through the exhaust pipe 3 and each of the DOC 4, DPF 5, SCR 6, and ASC 7, and the upstream side and the downstream side are defined by the direction in which the exhaust gas flows.

DOC4 is a catalyst that oxidizes HC, CO, etc. contained in exhaust gas. The DPF 5 is a filter that collects and removes PM contained in the exhaust gas. When ammonia (NH ₃ ) or urea water (hydrolyzed into ammonia) is supplied to the upstream side of the SCR 6 in the exhaust pipe 3, the SCR 6 chemically reacts ammonia and NOx contained in the exhaust gas. This is a catalyst that reduces and purifies NOx. The ASC 7 is a catalyst that oxidizes ammonia that has passed through the SCR 6 and has flowed downstream.

  Each catalyst 4, 6, 7 has a temperature range (that is, an activation temperature) that can exhibit a purification ability against environmental pollutants. However, when the engine 2 is cold started, the temperature of each of the catalysts 4, 6, and 7 is lower than the activation temperature, so that sufficient purification ability cannot be exhibited. Further, when the catalyst is warmed up to the activation temperature with the exhaust gas exhausted from the engine 2, the temperature of the exhaust gas exhausted from the engine 2 is relatively low immediately after the cold start of the engine 2, and the catalyst is activated early. Can't warm up. Therefore, in order for the catalysts 4, 6, and 7 to exhibit sufficient purification performance immediately after the engine 2 is started, it is necessary to quickly raise the temperatures of the catalysts 4, 6, and 7 to the activation temperature. . For this purpose, the exhaust gas purification system 1 includes a chemical heat storage device 10 that warms up upstream of the DOC 4 that is the most upstream catalyst.

  The chemical heat storage device 10 is a device that uses a reversible chemical reaction to heat (warm up) a heating object such as a catalyst without external energy. Specifically, the chemical heat storage device 10 stores the heat (waste heat) of the exhaust gas in the chemical heat storage device 10 by separating the heat storage material and the reaction medium. The chemical heat storage device 10 supplies the reaction medium to the heat storage material when necessary, causes the heat storage material and the reaction medium to chemically react (chemical adsorption), and uses the reaction heat during the chemical reaction to be heated. Heat the thing. In this embodiment, ammonia is used as the reaction medium.

  The chemical heat storage device 10 heats the heat exchanger 8 arranged on the upstream side of the DOC 4 that is the catalyst located on the most upstream side. Exhaust gas flows inside the heat exchanger 8, and the heat exchanger 8 exchanges heat with the exhaust gas. The exhaust gas whose temperature has been increased by this heat exchange flows into each downstream catalyst (DOC4, SCR6, ASC7), and each catalyst can be warmed up. In this embodiment, the heat exchanger 8 corresponds to the heating object described in the claims.

  The chemical heat storage device 10 will be described in detail with reference to FIGS. 2 and 3 in addition to FIG. FIG. 2 is a side sectional view of a part of the laminated structure shown in FIG. 3 is an enlarged view of a portion A in FIG. 2, (a) is a state where the fibrous substance is bent, and (b) is a state where a void is formed around the fibrous substance.

  The chemical heat storage device 10 includes a heater 11, a storage 12, a connecting pipe 13, a valve 14, and the like. In this embodiment, the heater 11 corresponds to the heater described in the claims, the storage 12 corresponds to the reservoir described in the claims, and the connection pipe 13 corresponds to the connection pipe described in the claims. It corresponds to.

  In this embodiment, a laminated structure 20 including the heater 11 and the heat exchanger 8 is configured. The laminated structure 20 includes a plurality of heaters 11 and a plurality of heat exchangers 8. The laminated structure 20 is disposed between the engine 2 and the DOC 4. In the laminated structure 20, the heaters 11 and the heat exchanger 8 are alternately laminated, and the heat exchanger 8 is disposed at both ends (outermost portions in the lamination direction). The contact surfaces of the case 11a of the heater 11 and the cylindrical member 8a of the heat exchanger 8 are joined by brazing, welding, or the like.

  The heat exchanger 8 is provided with a plurality of fins 8b inside a cylindrical member 8a. The cylindrical member 8a has a thin rectangular parallelepiped shape, and is a cylindrical member having both ends positioned in the direction in which the exhaust gas flows. The inside of the cylindrical member 8a becomes a flow path through which exhaust gas flows. The cylindrical member 8a is made of, for example, stainless steel (SUS or the like). The fins 8b are members for heat exchange, and are arranged at predetermined intervals over the entire area inside the cylindrical member 8a. The fins 8b are made of stainless steel, for example. The fin 8b in the example shown in FIG. 2 has a flat cross section, but the cross section may be a fin having another shape such as a wave shape or a zigzag shape.

  In the heater 11, a plurality of molded bodies 11b are accommodated in a case 11a. The case 11a has a thin rectangular parallelepiped shape. The case 11a is made of, for example, stainless steel. The molded body 11b includes a heat storage material 11c and a fibrous substance 11d. The molded body 11b has a substantially rectangular parallelepiped shape. A plurality of molded bodies 11b are arranged in the case 11a. A plurality of molded bodies 11b may not be accommodated in the case 11a, but a single large molded body 11b may be accommodated in the case 11a.

  The molded body 11b is formed by subjecting a powder heat storage material 11c and a large number of fibrous substances 11d to a press molding process using a press molding machine. That is, the molded body 11b is a press-molded body of a mixture of the heat storage material 11c and the fibrous substance 11d. In the mixing step, the fibrous material 11d is mixed so as to be uniformly dispersed in the powdered heat storage material 11c. In the press molding process, a pressure of a magnitude necessary for the powder heat storage material 11c to be pressed and the fibrous material 11d to be bent is applied. The molded body 11b formed in this way is in the form of a pellet that is hardened in a state where the fibrous material 11d is scattered in the powder heat storage material 11c. The fibrous material 11d is elastically deformed by a pressure applied from a predetermined direction and is bent. There is no space (space) inside the molded body 11b immediately after the press molding. FIG. 3A shows the inside of the molded body 11b immediately after the press molding process. In the heat storage material 11c (particles), there is a fibrous substance 11d in a bent state.

  As the heat storage material 11c, a material that generates heat by chemically reacting with ammonia as a reaction medium and can raise the temperature to be higher than the activation temperature of the catalyst is used. This material is a material having a MXa composition of a halogen compound, M = alkaline earth metal such as Mg, Ca, and Sr, and transition metal such as Cr, Mn, Fe, Co, Ni, Cu, and Zn. , X is Cl, Br, I, etc., and a = 2,3.

  The fibrous substance 11d is a fibrous (microscopic rod-like) substance, and is an elastic material having springback properties. In particular, the fibrous substance 11d was taken out from the press molding machine from a bent state (elastically deformed state) during press molding in the presence of particles of the heat storage material 11c constituting the molded body 11b. It is a substance with sufficient elasticity that will later return to its original natural state. Such a recovery phenomenon of elastic deformation of the material that occurs when pressure is removed is springback. FIG. 3B shows a state where the bent fibrous material 11d in FIG. 3A is spring-backed, and a gap B is formed around the spring-backed fibrous material 11d.

  The Young's modulus is used as an index indicating the property that the material bent by this pressure application returns to the original state when the pressure is released, that is, the spring back property. Young's modulus is a ratio of stress to strain in elastic deformation, and is also called “bending rigidity” or “flexing rigidity”. When the Young's modulus increases to some extent, the force to return to the original state when bent by a press increases. In order to return the fibrous material 11d from the bent state to the original state in the molded body 11b, the Young's modulus of the fibrous material 11d is preferably 50 GPa or more. Examples of the fibrous material that satisfies the Young's modulus include glass fiber [Young's modulus: 52 to 85 GPa], carbon fiber (carbon fiber) [Young's modulus: 70 to 880 GPa], Kepler fiber [Young's modulus: 112 GPa], Stainless fiber [Young's modulus: 200 GPa], alumina fiber [Young's modulus: 370 GPa], and SiC fiber [Young's modulus: 445 GPa].

  However, if the Young's modulus becomes too high, elastic deformation becomes difficult. Therefore, at the time of press molding, it is difficult to bend and may not bend. Therefore, the Young's modulus of the fibrous material 11d is desirably 1000 GPa or less.

  The fibrous substance 11d is preferably a substance having high thermal conductivity. When a substance having high thermal conductivity exists in the molded body 11b, heat generated by a chemical reaction between the heat storage material 11c and ammonia is easily transmitted to the heat exchanger 8. Examples of the material having high thermal conductivity among the fibrous materials 11d given as examples include carbon fibers. In addition, when the fibrous substance 11d is a substance with low thermal conductivity, an additive for improving thermal conductivity may be mixed. Examples of the additive include carbon beads, SiC beads, metal beads such as Cu, Ag, Ni, Ci—Cr, Al, Fe, and stainless steel, and polymer beads.

  The length of the fibrous substance 11d is sufficiently longer than the particle diameter of the heat storage material 11c and sufficiently shorter than the length of the case 11a in the stacking direction, and is desirably 10 μm to 5000 μm. The aspect ratio (= length / diameter) of the fibrous material 11d is such that a sufficiently large void is formed around the rod-like material when it is bent and returned to its original state by press molding. 5 or more is desirable.

  The storage 12 contains an adsorbent 12a that can hold (adsorb) and separate (release) ammonia as a reaction medium. As the adsorbent 12a, for example, activated carbon capable of storing ammonia by physical adsorption is used. In the storage 12, ammonia is separated from the adsorbent 12 a and supplied to the heater 11, and after the warm-up is finished, the exhaust heat of exhaust gas is received and the ammonia desorbed from the heat storage material 11 c is physically adsorbed to the adsorbent 12 a. Collect again. The adsorbent 12a is not limited to activated carbon, and for example, mesoporous material having mesopores such as mesoporous silica, mesoporous carbon, and mesoporous alumina, or zeolite and silica gel may be used.

  The connection pipe 13 is a pipe that connects the heater 11 and the storage 12, and serves as a flow path for circulating ammonia between the heater 11 and the storage 12. In particular, a member (not shown) for connecting to each of the plurality of heaters 11 is attached to an end of the connection pipe 13 on the heater 11 side. This member is, for example, an ammonia introduction header disposed on one side surface of the laminated structure 20. This ammonia introduction header forms a space between one side surface of the laminated structure 20 and introduces ammonia from the connecting pipe 13 into the space. In this case, for each heater 11, a hole through which ammonia passes is provided on one side surface of the case 11a on the introduction header side.

  The valve 14 is disposed in the middle of the connection pipe 13 and opens and closes the ammonia flow path between the heater 11 and the storage 12. When the valve 14 is opened, ammonia can be transferred between the heater 11 and the storage 12 via the connecting pipe 13. The opening / closing control of the valve 14 is performed by an ECU such as a dedicated controller of the chemical heat storage device 10 or an ECU [Electronic Control Unit] that controls the engine 2. The valve 14 is an electromagnetic normally closed valve and opens when a voltage is applied. The valve 14 may be a current-driven valve or a valve other than an electromagnetic valve.

  The operation of the chemical heat storage device 10 configured as described above will be described. The case 11a of each heater 11 accommodates a press-molded molded body 11b. At the completion of the press molding process, as shown in FIG. 3A, the fibrous substance 11d is in a bent state. After that, when taken out from the press molding machine and accommodated in the case 11a, the fibrous substance 11d gradually changes its shape from the bent state toward the original state due to its springback property. In this process, voids B are formed around the fibrous material 11d. Since the fibrous substance 11d is scattered in the molded body 11b, a large number of voids B are scattered inside and on the surface of the molded body 11b. The scattered voids B serve as ammonia flow paths in the molded body 11b.

  In addition, in the example shown in FIG. 3, although the particle | grains of the thermal storage material 11c exist in the perimeter of the fibrous substance 11d, the some fibrous substance 11d may exist intertwined. In this case, a gap B is formed between the tangled fibrous materials 11d. Thus, the space | gap B is easy to be formed when the fibrous substance 11d is intertwined. Further, the higher the mixing ratio of the fibrous substance 11d in the molded body 11b, the more voids B are formed.

  During operation of the engine 2, when the temperature of the exhaust gas discharged from the engine 2 is equal to or lower than the warm-up start temperature (for example, immediately after the engine 2 is started), the valve 14 is opened when a voltage is applied to the valve 14. As a result, ammonia can be moved in the connecting pipe 13. At this time, the pressure of the storage 12 is higher than the pressure of the whole of the plurality of heaters 11, and ammonia moves to the heater 11 side and flows in the connection pipe 13. Then, ammonia flowing in the connection pipe 13 is supplied into the cases 11a of the plurality of heaters 11, respectively. The warm-up start temperature is a temperature that requires warm-up in the exhaust gas purification system 1. The warm-up start temperature is set based on the activation temperature of the catalyst (such as DOC4).

  Ammonia supplied into the case 11a flows throughout the interior of the molded body 11b using the gaps B scattered inside and on the surface of the molded body 11b. Thereby, ammonia diffuses throughout the heat storage material 11c. In each heater 11, the diffused ammonia and the heat storage material 11c chemically react to generate heat. The generated heat is transmitted to the heat exchanger 8 adjacent to the heater 11. In each heat exchanger 8, the transferred heat is heat-exchanged with the exhaust gas through the fins 8b. Thereby, the temperature of the exhaust gas rises. This heated exhaust gas flows downstream, and the temperature of each catalyst of DOC4, SCR6, and ASC7 rises. Thereby, each catalyst can be warmed up. And when the temperature of each catalyst becomes more than the activation temperature, the exhaust gas can be purified.

  In particular, when ammonia is first supplied into the case 11a, the voids B are already scattered inside and on the surface of the molded body 11b, so that ammonia can diffuse quickly and uniformly throughout the heat storage material 11c. When ammonia is first supplied, the heat storage material 11c expands when it chemically reacts with ammonia. This expansion causes rearrangement of the powdered heat storage material 11c and the fibrous material 11d. Also at the time of this rearrangement, as shown in FIG. 3 (b), the spring back of the fibrous substance 11d occurs, so that the gap B remains around the fibrous substance 11d. The size and shape of the gap B change according to the change in the state of the fibrous substance 11d. The air gap B remains even after ammonia is desorbed from the heat storage material 11c. Therefore, even when ammonia is supplied into the case 11a after the second time, the ammonia can be quickly and uniformly diffused throughout the heat storage material 11c due to the gaps B scattered inside and on the surface of the molded body 11b. In addition, some of the fibrous substances 11d may be returned to the original state before ammonia is first supplied into the case 11a (before expansion).

  When the operation of the engine 2 continues to some extent after the warm-up is completed and the temperature of the exhaust gas discharged from the engine 2 becomes high, ammonia and the heat storage material 11c are desorbed in the heater 11 to generate ammonia. When the temperature of the exhaust gas is higher than the temperature at which ammonia can be recovered, the valve 14 opens when a voltage is applied to the valve 14. As a result, ammonia can be moved in the connecting pipe 13. At this time, the pressure of the entire plurality of heaters 11 is higher than the pressure of the storage 12, and ammonia moves to the storage 12 side and flows through the connection pipe 13. Then, the ammonia flowing through the connection pipe 13 is collected by the storage 12. In the storage 12, ammonia is adsorbed by the adsorbent 12a and stored. The ammonia recoverable temperature is a temperature at which ammonia can be recovered from the heater 11 after warming up. The ammonia recoverable temperature is set based on the temperature at which ammonia is desorbed from the heat storage material 11c determined by the combination of the heat storage material 11c and ammonia.

  According to the chemical heat storage device 10, the void B formed by the fibrous material 11d in the molded body 11b serves as the ammonia flow path, so that ammonia can be diffused throughout the heat storage material 11c. As a result, the heat generation efficiency in the heater 11 is improved, and the performance as the heater 11 can be sufficiently exhibited. Further, according to the chemical heat storage device 10, by using the fibrous substance 11d having a length and an aspect ratio within a predetermined range, the void B formed by the fibrous substance 11d has an appropriate size as an ammonia flow path.

  In addition, the performance comparison experiment of the heater 11 comprised with the molded object 11b containing the thermal storage material 11c and the fibrous substance 11d of the said embodiment, and the heater 11 'comprised with the molded object 11b "containing only the thermal storage material 11c was conducted. Although carbon fiber and glass fiber were used as the fibrous material 11d, the following results were obtained with either material: In the case of the heater 11 including the fibrous material 11d, ammonia was first contained in the case 11a. When it was supplied to the heater 11, sufficient performance was obtained as the heater 11. This sufficient performance is the maximum heat generation amount that can be generated according to the amount of the heat storage material 11c mounted on the heater 11, or close to it. In this case, it can be inferred that ammonia diffuses in almost all of the heat storage material 11c mounted on the heater 11 and that almost all of the heat storage material 11c has chemically reacted. On the other hand, in the case of the heater 11 ′ that does not include the fibrous substance 11d, when ammonia was first supplied into the case 11a, sufficient performance was not obtained as the heater 11. In this case, the heater 11 ′ is mounted on the heater 11. It can be presumed that ammonia did not diffuse into a part of the heat storage material 11c and a part of the heat storage material 11c did not chemically react.

  As mentioned above, although embodiment of this invention was described, it is implemented in various forms, without being limited to the said embodiment.

  For example, in the above embodiment, the fibrous material is used as the elastic material. However, the present invention is not limited to this, and a shape in which a minute film-like (thin film-like) elastic material or a minute rod-like material is spirally wound. Alternatively, an elastic material, a particulate elastic material, a fine plate-like elastic material, or the like may be used.

  Moreover, in the said embodiment, although the chemical thermal storage apparatus was applied to the exhaust-gas purification system provided with DOC, SCR, and ASC as a catalyst, and DPF as a filter, you may apply to the exhaust-gas purification system of another structure. For example, the chemical heat storage device may be applied to an exhaust gas purification system that does not include any one or two of DOC, SCR, and ASC, and an exhaust gas purification system that includes a catalyst other than DOC, SCR, and ASC. Good. Although the vehicle is a diesel engine vehicle, it can also be applied to a gasoline engine vehicle.

  Moreover, in the said embodiment, although it was set as the heat exchanger of the upstream of DOC as a heating target object, other things may be sufficient as a heating target object, for example, any catalyst of DOC, SCR, and ASC is heated. It is good also as a thing. In the above embodiment, a laminated structure in which heaters and heat exchangers are alternately laminated is configured. However, an annular heater may be provided on the outer peripheral portion of the heat exchanger.

  In the above embodiment, the reaction medium is ammonia, but other reaction medium such as alcohol or water may be used. In the above embodiment, each material of the heat storage material and the adsorbent when the reaction medium is ammonia is exemplified, but depending on the reaction medium used in the chemical heat storage device, other materials may be used as appropriate for the heat storage material and the adsorbent. Used.

  Furthermore, the heating object of the chemical heat storage device of the present invention is not limited to a heat exchanger or a catalyst provided in an engine exhaust system, and may be an exhaust pipe itself through which exhaust gas flows. Or the heater of a chemical thermal storage apparatus is applicable also to what heats the piping etc. which were provided in the distribution system of oil other than the exhaust system of an engine, for example. Furthermore, the heater of the chemical heat storage device may heat various heat media in the vehicle such as engine oil, transmission oil, cooling water, or air. At this time, the heater of the chemical heat storage device may be disposed on the outer peripheral portion (a part of the outer peripheral portion or the entire outer periphery of the outer peripheral portion) of the heat medium flow path through which the heat medium flows to heat the heat medium flow path itself. . Further, a heat exchanger may be disposed in the heat medium flow path through which the heat medium flows, and the heat medium may be heated via the heat exchanger by a heater disposed on the outer periphery of the heat medium flow path.

  In addition, a heat exchange unit integrated heater in which a plurality of cases in which the heat storage material is accommodated and heat exchange units such as heat exchange fins are alternately stacked is configured, and the heat exchange unit integrated heater is You may arrange | position in the heat-medium storage part in which the heat medium is stored, and the heat-medium flow path through which a heat-medium flows. Furthermore, this invention is applicable also to the chemical heat storage apparatus arrange | positioned besides an engine.

  DESCRIPTION OF SYMBOLS 1 ... Exhaust gas purification system, 2 ... Engine, 3 ... Exhaust pipe, 4 ... Diesel oxidation catalyst (DOC), 5 ... Diesel exhaust particulate removal filter (DPF), 6 ... Selective reduction catalyst (SCR), 7 ... Ammonia slip catalyst (ASC), 8 ... heat exchanger, 8a ... cylindrical member, 8b ... fin, 10 ... chemical heat storage device, 11 ... heater, 11a ... case, 11b ... molded body, 11c ... heat storage material, 11d ... fibrous material, DESCRIPTION OF SYMBOLS 12 ... Storage, 12a ... Adsorbent, 13 ... Connecting pipe, 20 ... Laminated structure.

Claims (2)

A chemical heat storage device for heating an object to be heated,
A heater in which a molded body containing a heat storage material that reversibly generates heat due to a chemical reaction with the reaction medium and desorption of the reaction medium due to heat storage and an elastic material having springback properties is housed in a case;
A reservoir for storing the reaction medium;
A connecting pipe for circulating the reaction medium between the heater and the reservoir;
With
The molded body is a press molded body of a mixture of the heat storage material and the elastic material,
The elastic material is a chemical heat storage device having a Young's modulus of 50 GPa or more.   The chemical heat storage device according to claim 1, wherein the elastic material is a fibrous material having a length of 10 μm to 5000 μm and an aspect ratio of 5 or more.

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