JP5687179B2 - Chemical heat storage reactor - Google Patents

Description

  The present invention relates to a chemical heat storage reactor.

  Patent Document 1 discloses a flywheel-assisted electric drive device that reduces the peak output of a storage battery with a flywheel and collects regenerative energy during braking without passing through the storage battery (see Patent Document 1). ).

  Patent Document 2 discloses a reaction part in which a chemical heat storage material that stores heat by generating a dehydration reaction by heating with a heater and releases heat by generating a hydration reaction, and an evaporation / A chemical heat storage system including a condenser is disclosed (see Patent Document 2).

  Here, the heat conduction blocking performance between the heater and the chemical heat storage material during the hydration reaction and the heat transfer promotion function between the heater and the chemical heat storage material during the dehydration reaction are improved, thereby improving efficiency. It is required to store heat.

US4423794 JP 2009-257686A

  In consideration of the above facts, the present invention has a heat conduction blocking performance between the heater layer and the heat storage layer during the hydration reaction, and a heat transfer promotion function between the heater layer and the heat storage layer during the dehydration reaction. The challenge is to provide a chemical heat storage reactor that can be improved.

      Is the purpose.

  The chemical heat storage reactor according to claim 1 is provided with heat transfer partition walls provided at intervals in the wall thickness direction and outside the heat transfer partition wall direction in the wall thickness direction, and stores heat by generating a dehydration reaction by heating. A heat storage layer filled with a chemical heat storage material that dissipates heat by generating a hydration reaction, and is provided between the heat transfer partition walls, converts electrical energy into heat energy, and has a larger coefficient of linear expansion than the heat transfer partition walls. A heater layer that is thinner than between the heat transfer partitions during the hydration reaction and that heat-expands during the dehydration reaction to contact the heat transfer partition and heat the heat storage layer via the heat transfer partition; Is provided.

  In the chemical heat storage reactor according to the first aspect, since the heater layer is thinner than between the heat transfer partition walls during the hydration reaction, a gap is formed between the heater layer and the heat transfer partition wall. Therefore, an air layer is formed between the heater layer and the heat transfer partition, and this air layer exhibits a heat transfer blocking function. That is, the heat conduction blocking performance between the heater layer and the heat storage layer during the hydration reaction is improved. Therefore, heat transfer from the heat storage layer to the heater layer is suppressed, thereby reducing sensible heat loss due to the heat capacity of the heater layer.

  On the other hand, during the dehydration reaction, the heater layer is thermally expanded, so that the heater layer is in surface contact and the heat of the heater layer is transferred to the heat storage layer. Further, in the region where the dehydration rate at the initial stage of the reaction is high, pressure is received from the heat storage layer due to the thermal expansion of the chemical heat storage layer. Therefore, in the heat transfer partition, due to the interaction between the surface contact of the heater layer and the pressure of the heat storage layer, the pressure distribution on the contact surface between the heat transfer partition and the heater layer is made uniform, and the contact heat resistance is reduced and the heat transfer is reduced. The promotion function is improved. Therefore, the heat transfer rate control in the region where the dehydration rate is high is improved.

  As described above, both the heat conduction blocking performance between the heater layer and the heat storage layer during the hydration reaction and the heat transfer promotion function between the heater layer and the heat storage layer during the dehydration reaction are improved.

  The chemical heat storage reactor according to claim 2 is provided between the heat storage layer and the heat transfer partition. Water vapor generated in the heat storage layer flows during a dehydration reaction, and water vapor is supplied to the heat storage layer during a hydration reaction. A vapor diffusion layer to be supplied; and a structure that is provided in the vapor diffusion layer and transfers heat from the heat transfer partition to the heat storage layer and is elastically deformable.

  In the chemical heat storage reactor according to claim 2, the structure provided in the vapor diffusion layer between the heat storage layer and the heat transfer partition wall is elastically deformed with the hydration expansion of the heat storage layer during the hydration reaction. The heat transfer partition wall is prevented from being deformed into a convex shape and the pressure distribution on the contact surface is prevented from becoming non-uniform. That is, the pressure distribution on the contact surface between the heater layer and the heat transfer partition is made uniform. Therefore, the contact thermal resistance is reduced and the heat transfer promoting function is improved.

  In addition, the heat transfer partition is deformed into a convex shape and the pressure distribution on the contact surface becomes non-uniform so that bending stress is generated on the heater layer and the pressure distribution on the contact surface becomes non-uniform. As a result, the durability performance of the heater layer is improved.

  Further, during the dehydration reaction, the structure provided in the vapor diffusion layer transfers the heat of the heater layer transferred through the heat transfer partition to the heat storage layer.

  The chemical heat storage reactor according to a third aspect includes a medium flow path layer that is disposed so as to be in contact with the heat storage layer and is filled with a heated medium that can exchange heat with the heat storage layer.

  In the chemical heat storage reactor according to claim 3, during the hydration reaction, heat is exchanged between the medium to be heated and the heat storage layer filled in the medium flow path layer, and the chemical heat storage material in the heat storage layer has a high reaction rate. Is maintained. In addition, it is possible to heat and raise the temperature of the object to be warmed by flowing a heated medium whose temperature has been increased through heat exchange through a separately provided flow path. That is, the heat storage layer can be transported.

  On the other hand, at the time of dehydration reaction, after heat storage is completed (after dehydration is completed), the sensible heat of the heat storage layer, heater layer, etc. is recovered by heat exchange by using the medium to be heated as a low-temperature medium, and the heat utilization destination is heated. It is possible to transport.

  The chemical heat storage reactor according to claim 4, wherein the medium flow path layer is provided between the heat storage layer and the heat transfer partition, and the medium flow path layer is formed from the heat transfer partition to the heat storage layer. A structure capable of transferring heat and elastically deforming is provided.

  In the chemical heat storage reactor according to claim 4, the structure provided in the medium flow path layer between the heat storage layer and the heat transfer partition is elastically deformed with the hydration expansion of the heat storage layer during the hydration reaction. Thus, it is possible to prevent the pressure distribution on the contact surface from becoming uneven due to the heat transfer partition being convexly deformed. That is, the pressure distribution on the contact surface between the heater layer and the heat transfer partition is made uniform. Therefore, the contact thermal resistance is reduced and the heat transfer promoting function is improved.

  In addition, the pressure distribution on the contact surface is uneven due to the heat transfer partition being deformed into a convex shape, and bending stress is generated on the heater layer and the pressure distribution on the heater layer is uneven due to the uneven pressure distribution on the contact surface. Occurrence is suppressed, and as a result, the durability performance of the heater layer is improved.

  Further, during the dehydration reaction, the structure provided in the medium flow path layer transfers the heat of the heater layer transferred through the heat transfer partition to the heat storage layer.

  The chemical heat storage reactor according to claim 5 includes a through hole penetrating the heater layer, and a reinforcing member inserted into the through hole and supporting the heat transfer partition.

  In the chemical heat storage reactor according to the fifth aspect, since the reinforcing member supports the heat transfer partition together with the heater layer against the thermal expansion of the heat storage layer during the dehydration reaction, the stress applied to the heater layer is reduced. Thereby, the pressure distribution on the contact surface between the heater layer and the heat transfer partition is made uniform. Therefore, the contact thermal resistance is reduced and the heat transfer promoting function is improved. Further, since the stress applied to the heater layer is reduced, the durability performance of the heater layer is improved.

  In addition, expansion and deformation of the heat transfer partition due to the hydration expansion of the heat storage layer during the hydration reaction is suppressed, and as a result, partial contact between the heat transfer partition and the heater layer is prevented, and the air layer is reliably It is formed. Therefore, the heat transfer blocking function (heat insulation function) by the air layer is effectively exhibited. That is, the heat conduction blocking performance between the heater layer and the heat storage layer during the hydration reaction is improved. Therefore, heat transfer from the heat storage layer to the heater layer is suppressed, thereby reducing sensible heat loss due to the heat capacity of the heater layer.

  In the chemical heat storage reactor according to claim 6, the reinforcing member is made of a material and a shape that have a lower heat conduction member and a lower heat capacity than the heater layer.

  In the chemical heat storage device according to claim 6, since the reinforcing member is made of a material and a shape having a low heat conduction member and a low heat heat capacity than the heater layer, heat transfer from the heat storage layer to the reinforcing member during the hydration reaction and Heat transfer to the heater layer is suppressed, and as a result, sensible heat loss is reduced.

  In the chemical heat storage reactor according to a seventh aspect of the present invention, mold release means for improving mold release properties is provided on the wall surface of the heat transfer partition on the heater layer side.

  In the chemical heat storage reactor according to claim 7, when the heater layer in surface contact with the heat transfer partition during the dehydration reaction is released from the heat transfer partition, the release property is promoted by the release means. It is prevented or suppressed that the air layer is not formed while remaining in contact with the heat transfer partition. Therefore, the heat conduction blocking performance between the heater layer and the heat storage layer during the hydration reaction is more reliably exhibited.

  According to the chemical heat storage reactor according to claim 1, the heat conduction blocking performance between the heater layer and the heat storage layer during the hydration reaction and the heat transfer between the heater layer and the heat storage layer during the dehydration reaction. Both the promotion function can be improved.

  According to the chemical heat storage reactor of the second aspect, the contact thermal resistance is reduced, so that the heat transfer promoting function can be further improved.

  According to the chemical heat storage reactor of the third aspect, the high reaction rate of the chemical heat storage material of the heat storage layer can be maintained during the hydration reaction.

  According to the chemical heat storage reactor of the fourth aspect, since the contact thermal resistance is reduced, the heat transfer promoting function can be further improved.

  According to the chemical heat storage reactor of the fifth aspect, the heat transfer promoting function and the heat conduction blocking performance can be further improved as compared with the configuration having no reinforcing member.

  According to the chemical heat storage reactor of the sixth aspect, heat transfer from the heat storage layer to the reinforcing member and heat transfer to the heater layer during the hydration reaction can be suppressed.

  According to the chemical heat storage reactor according to claim 7, the heat conduction blocking performance between the heater layer and the heat storage layer during the hydration reaction can be more reliably exhibited as compared with the welfare that does not have a mold release means. be able to.

It is a system configuration figure showing typically the outline whole composition of a chemical heat storage system. (A) is sectional drawing which shows the reactor for chemical heat storage of 1st embodiment typically, (B) is the expanded sectional view which expanded the principal part of (A). (A) is sectional drawing which shows typically the heater layer of the reactor for chemical thermal storage, (B) is the side view which looked at (A) in the B direction. The thermal storage layer of the chemical thermal storage reactor is schematically shown, in which (A) is a diagram during a dehydration reaction, and (B) is a diagram during a hydration reaction. It is explanatory drawing corresponding to FIG. 2 which demonstrates the state of the dehydration reaction of the chemical thermal storage reactor of 1st embodiment to (A)-(C) in order. (1) shows the change in the surface contact ratio of the heater layer to the heat transfer partition, (2) shows the temperature change of the heat storage layer, and (3) shows the heat storage layer) during the dehydration reaction of the chemical heat storage reactor. (4) is a graph which shows the change of dehydration speed. It is sectional drawing which shows typically the reactor for chemical heat storage of 2nd embodiment. (A) And (B) is a schematic diagram which shows the elastic deformation of the structure accompanying the thermal expansion of the thermal storage layer of the reactor for chemical thermal storage of 2nd embodiment, (C) is the thermal expansion of the thermal storage layer of a comparative example. It is a schematic diagram which shows a deformation | transformation of the heat-transfer partition by. (A) which shows typically the chemical thermal storage reactor of 3rd embodiment is sectional drawing at the time of a hydration reaction, (B) It is sectional drawing at the time of a dehydration reaction. It is a schematic diagram which shows the elastic deformation of the structure accompanying the thermal expansion of the thermal storage layer of the reactor for chemical thermal storage of 3rd embodiment. It is a perspective view which shows typically the heater layer of the reactor for chemical heat storage of 4th embodiment. (A) which shows typically the chemical thermal storage reactor of 4th embodiment is sectional drawing at the time of a hydration reaction, (B) It is sectional drawing at the time of a dehydration reaction.

<Chemical heat storage system>
First, a chemical heat storage system 10 using a chemical heat storage reactor according to an embodiment of the present invention will be described with reference to FIG.

  In FIG. 1, a schematic overall configuration of the chemical heat storage system 10 is shown in a schematic system configuration diagram. As shown in this figure, the chemical heat storage system 10 includes the chemical heat storage reactor 100 of the first embodiment. In the chemical heat storage reactor 100, as will be described later, the chemical heat storage material 112 (see FIG. 2) stores heat (absorbs heat) with dehydration, and dissipates heat (generates heat) with hydration (restoration to calcium hydroxide). It is configured.

  The chemical heat storage system 10 includes a condensing unit that condenses water vapor introduced from the chemical heat storage reactor 100, a storage unit that stores water condensed with water vapor (liquid phase water, the same applies hereinafter), and evaporates the stored water. And an evaporator / condenser 14 having each function as an evaporation section that generates steam to be supplied to the chemical heat storage reactor 100. The container 16 of the evaporator / condenser 14 is configured with a refrigerant flow path for water vapor condensation, a heat medium flow path for evaporation, and the like.

  The container 16 of the evaporator / condenser 14 is communicated with the chemical heat storage reactor 100 via a water vapor circulation path 20 constituting a water vapor circulation system. The water vapor circulation path 20 is provided with an on-off valve 22 for switching between communication and non-communication.

<First embodiment>
Next, the chemical heat storage reactor according to the first embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 2, the chemical heat storage reactor 100 is configured such that a heater layer 150, a heat storage layer 110, and a vapor diffusion layer 120 are provided in a reaction container 102 in a layered manner. In addition, the arrow S of each figure has shown the wall thickness direction (layer direction) S of the heat-transfer partition 104 mentioned later.

  The heater layer 150 is provided at the center of the reaction vessel 102 in the wall thickness direction S, and the heat storage layer 110 is provided on both outer sides of the heater layer 150 in the wall thickness direction S. A vapor diffusion layer 120 is provided between both outer sides in the wall thickness direction S of the heat storage layer 110 and the side wall 102 </ b> A of the reaction vessel 102.

  The reaction vessel 102 is made of a metal material such as stainless steel. In addition, a heat transfer partition wall 104 is provided inside the reaction vessel 102 so as to face the wall thickness direction S. A heater layer 150 is provided in a space (slit) 106 between the heat transfer partition walls 104. In other words, the heat transfer partition 104 partitions the heater layer 150 and the heat storage layer 110.

The heat storage layer 110 is filled with a particulate chemical heat storage material 112 (see also FIG. 4). The chemical heat storage material 112 employs calcium hydroxide (Ca (OH) ₂ ), which is one of alkaline earth metal hydroxides. Therefore, in the heat storage layer 110, it is set as the structure which can reversibly repeat heat storage and heat dissipation by the reaction shown below.

Ca (OH) ₂ Ｃａ CaO + H ₂ O
When the heat storage amount and the heat generation amount Q are shown together in this equation,
_{Ca (OH) 2 + Q →} CaO + H 2 O ( dehydration, FIG 4 (A) → (B) )
CaO + H ₂ O → Ca (OH) ₂ + Q (hydration reaction, FIG. 4 (B) → (A))
It becomes.

The heat storage capacity per kg of the chemical heat storage material (Ca (OH) ₂ ) 112 is approximately 1.86 [MJ / kg-Ca (OH) ₂ ].

  The vapor diffusion layer 120 functions as a water vapor channel. Specifically, it functions as a flow path for supplying water vapor sent from the evaporator / condenser 14 (see FIG. 1) to the chemical heat storage material 112 via the water vapor circulation path 20 described above during the hydration reaction. On the other hand, during the dehydration reaction, the water vapor separated and generated from the chemical heat storage material 112 functions as a water vapor flow path that sends the vapor to the condenser 14 via the water vapor circulation path 20. Further, the vapor diffusion layer 120 is provided with a metal corrugated structure (fin) 122, thereby ensuring a water vapor flow path. Further, since the corrugated uneven direction of the structure 122 is the wall thickness direction S, the structure 122 is elastically deformed in the wall thickness direction S.

  As shown in FIG. 3, the heater layer 150 is layered with a heat generating portion 152 that converts electrical energy into heat energy and an insulating portion 154 provided on both outer sides in the wall thickness direction S of the heat generating portion 152. It is configured. The heat generating part 152 is made of a heater wire such as a nichrome wire, and the insulating part 154 is made of a mica material. The heat generating unit 152 generates heat when electricity supplied from the power source 158 (see FIG. 1) flows.

The material is selected so that the linear expansion coefficient K1 of the insulating portion 154 constituting the heater layer 150 is larger than the linear expansion coefficient K2 of the heat transfer partition 104 (K1> K2). In the present embodiment, the linear expansion coefficient K1 of the mica material constituting the insulating portion 154 of the heater layer 150 is “52 × 10 ⁻⁶ [1 / K]”, and the stainless steel material constituting the heat transfer partition 104 is made of The linear expansion coefficient K2 is “17.3 × 20 ⁻⁶ [1 / K]”.

  Further, as shown in FIG. 2B, the thickness T1 in the wall thickness direction S of the heater layer 150 at the time of non-heating (predetermined temperature C1 degrees or less) is an interval between heat transfer partition walls 104, that is, a space ( The width L1 of the slit) 106 in the wall thickness direction S is smaller. That is, the air layer 108 is formed between the heat transfer partition 104 and the heater layer 150.

  However, when the heater layer 150 is heated, both the heater layer 150 and the heat transfer partition 104 are thermally expanded, but the linear expansion coefficient K1 of the heater layer 150 is larger than the linear expansion coefficient K2 of the heat transfer partition 104. As a result, the heater layer 150 expands more greatly, and as a result, the state in which the heater layer 150 is in contact with the heat transfer partition 104 is maintained during heating (at a predetermined temperature C2 or higher). (See FIG. 5B).

  In addition, the wall surface 104A on the heater layer 150 side of the heat transfer partition 104 is subjected to plating processing that improves the releasability of releasing the heater layer 150. That is, the plating layer 105 is formed on the wall surface 104A.

[Action and effect]
Next, the operation and effect of this embodiment will be described.

  As shown in FIGS. 1 to 4, in the chemical heat storage system 10, when storing heat in the chemical heat storage material 112 of the heat storage layer 110 of the chemical heat storage reactor 100, the heater layer 150 is opened with the on-off valve 22 opened. When heat is supplied from the power source 158 to the heat generating part 152, the chemical heat storage material 112 undergoes a dehydration reaction due to heat, and heat is stored in the chemical heat storage material 112 (heat storage layer 110). At this time, the water vapor dehydrated from the chemical heat storage material 112 is introduced into the evaporator / condenser 14 via the vapor diffusion layer 120 and the water vapor circulation path 20. In the evaporator / condenser 14, the water vapor is cooled by the refrigerant flowing through the refrigerant flow path, and the condensed water is stored.

  On the other hand, when dissipating the heat stored in the chemical heat storage reactor 100, the chemical heat storage system 10 opens the on-off valve 22 and opens the on-off valve 22 from the evaporator / condenser 14 via the water vapor circulation path 20. Is supplied to the chemical heat storage material 112 of the heat storage layer 110 of the reactor 100 for use. Thereby, a hydration reaction occurs in the chemical heat storage material 112 to dissipate heat. Then, the radiated heat is used.

  Thus, in the chemical heat storage reactor 100, the chemical heat storage material 112 filled in the heat storage layer 110 is configured to reversibly generate heat and absorb heat by a hydration reaction and a dehydration reaction.

  Next, the heater layer 150 in each of the hydration reaction and the dehydration reaction will be described in detail.

  First, the time of hydration reaction (FIG. 4B → the reaction of FIG. 4A) will be described.

  As shown in FIG. 5A, since the heater layer 150 is in a non-heated state, it is in a non-contact state with a gap between the heat transfer partition 104 and the heater layer 150. That is, the air layer 108 is formed between the heat transfer partition 104 and the heater layer 150.

  On the other hand, in the heat storage layer 110, as shown in FIG. 4A, the granular chemical heat storage material 112 expands by the hydration reaction, but the expansion is suppressed by the heat transfer partition 104 (the arrow in FIG. 5A). See F1). Therefore, the air layer 108 shown in FIG. And since the air layer 108 exhibits a heat conduction blocking effect (heat insulation effect), heat transfer to the heater layer 150 by heat radiated by the chemical heat storage material 112 of the heat storage layer 110 is suppressed by the hydration reaction.

  Therefore, since the sensible heat loss due to the heat capacity of the heater layer 150 is reduced, the heat utilization efficiency of the heat radiated from the chemical heat storage material 112 of the heat storage layer 110 is improved. That is, the heat generated from the chemical heat storage material 112 of the heat storage layer 110 by the hydration reaction can be effectively used.

  Next, the dehydration reaction (FIG. 4 (A) → FIG. 4 (B)) will be described.

First, the graph of FIG. 6 will be described.
(1) in the graph of FIG. 6 shows a change in the contact pressure (surface contact ratio) of the heater layer 150 to the heat transfer partition 104. (2) shows the temperature change of the heat storage layer 110 (chemical heat storage material 112). (3) shows the change in the thermal expansion force of the heat storage layer (chemical heat storage material 112). (4) shows the change in the dehydration rate. The horizontal axis is a time axis, and the vertical axis is an axis corresponding to each graph.

  FIG. 6A shows a period from when the heater layer 150 is thermally expanded until it contacts the heat transfer partition 104. A line D indicates a point in time at which the pressure distribution on the contact surface between the heater layer 150 and the heat transfer partition 104 becomes constant. Further, (A) to (C) in FIG. 5 correspond to (A) to (C) in FIG. 6. In addition, this graph is schematically shown for explaining each change, and is not a graph measured accurately.

  As shown in FIGS. 6, 5 (A) and 5 (B), when the heater layer 150 generates heat, heat conduction is blocked by the air layer 108 (since it is insulated), the heater layer 150 Without being deprived of heat, it expands at high speed until it contacts the heat transfer partition 104.

  As shown in FIGS. 6 and 5B, both the heater layer 150 and the heat transfer partition 104 thermally expand after contact, but the linear expansion coefficient K1 of the heater layer 150 is the linear expansion coefficient of the heat transfer partition 104. The material is selected so as to be larger than K2. Therefore, the heater layer 150 expands more greatly, and when heated (predetermined temperature C2 or higher), the heater layer 150 is maintained in contact with the heat transfer partition 104 and the heater layer 150 is thermally expanded. Makes contact contact evenly (the pressure distribution on the contact surface becomes uniform). Then, heat is transferred from the heater layer 150 to the heat storage layer 150 through the heat transfer partition 104, and the heat storage layer 110 (chemical heat storage material 112) is heated.

  Here, since the chemical heat storage material 112 is in an expanded state at the beginning of the dehydration reaction (see FIG. 4A), a large stress (arrow F2) is generated in the heat transfer partition 104. Therefore, since the heat transfer partition 104 receives pressure from both sides, the contact resistance heat is reduced. Therefore, the heat transfer rate control is improved (improved) in a region where a fast dehydration rate is required at the beginning of the reaction (region K in FIG. 6).

  That is, the heat transfer partition 104 has a pressure distribution on the contact surface between the heat transfer partition 104 and the heater layer 150 due to the interaction between the surface contact of the heater layer 150 and the pressure from the heat storage layer 150 (expansion pressure of the chemical heat storage material 112). Becomes uniform, the contact thermal resistance is reduced, and the heat transfer promoting function is improved. Therefore, the heat transfer rate control in the region where the dehydration rate is high is improved.

  As shown in FIGS. 6 and 5C, when the dehydration reaction further proceeds, the chemical heat storage material 112 contracts (see FIG. 4B), so that the stress (arrow F3) of the heat transfer partition 104 decreases. . However, since the dehydration rate may be slow, it is preferable.

  Further, since the heater layer 150 is in surface contact with the heat transfer partition 104 uniformly, the temperature distribution of the heater layer 150 is made uniform. Therefore, deterioration of the heater layer 150 due to the occurrence of an excessive temperature rise portion in the heater layer 150 is prevented.

  Here, the heater layer 150 in surface contact with the heat transfer partition 104 by the dehydration reaction contracts when the dehydration reaction is completed. At this time, if the heater layer 150 is not separated from the heat transfer partition 104, the air layer 108 (see FIGS. 2 and 5A) is not formed. Therefore, in the present embodiment, the plating layer 105 (FIG. 5B) that improves the releasability of the heater layer 150 is formed on the wall surface 104 </ b> A on the heater layer 150 side of the heat transfer partition 104. Therefore, the heater layer 150 is reliably separated from the heat transfer partition 104, and the air layer 108 is reliably formed. Therefore, the heat conduction blocking effect (heat insulating effect) by the air layer 108 is reliably exhibited, and the sensible heat loss is reduced.

<Second embodiment>
Next, the chemical heat storage reactor according to the first embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the same member as 1st embodiment, and the overlapping description is abbreviate | omitted.

  The chemical heat storage reactor 200 includes a reaction vessel 102 in which a heater layer 150, a heat storage layer 110, and a vapor diffusion layer 120 are provided in layers. The vapor diffusion layer 120 is disposed between the heat transfer partition 104 and the heat storage layer 150. The vapor diffusion layer 120 is provided with a metal corrugated structure (fin) 122, thereby ensuring a water vapor flow path. Further, since the corrugated uneven direction of the structure 122 is the wall thickness direction S, the structure 122 is elastically deformed in the wall thickness direction S.

  The configuration other than the arrangement position of the vapor diffusion layer 120 is the same as that of the first embodiment.

[Action and effect]
Next, the operation and effect of this embodiment will be described.

  During the dehydration reaction, the heat transferred from the heater layer 150 to the heat transfer partition 104 is transferred to the heat storage layer 150 through the metal corrugated structure (fin) 122 of the vapor diffusion layer 120.

  As shown in FIGS. 8 (A) and 8 (B), the structure 122 provided in the vapor diffusion layer 120 between the heat storage layer 110 and the heat transfer partition wall 104 is the heat of the heat storage layer 110 during the dehydration reaction. By elastically deforming in the wall thickness direction S with respect to expansion, the pressure distribution on the contact surface between the heater layer 150 and the heat transfer partition 104 is made uniform. Therefore, the contact thermal resistance is reduced and the heat transfer promoting function is improved.

  Here, as in the comparative example shown in FIG. 8C, when the expansion force of the heat storage layer 110 is large, since both ends of the heat transfer partition 104 are fixed, the central portion expands and deforms into a convex shape. Therefore, the pressure distribution between the expanded heater layer 150 and the contact surface may be uneven. When the pressure distribution on the contact surface becomes non-uniform in this way, there is a fear that the heat transfer efficiency is lowered. In addition, there is a fear that the durability of the heater layer 150 may be lowered due to a bending stress generated in the heater layer 150 or an excessive temperature rising portion generated according to the pressure distribution on the contact surface.

  However, in this embodiment, since the vapor diffusion layer 120 is disposed between the heat transfer partition 104 and the heat storage layer 110 as described above, the structure 122 constituting the vapor diffusion layer 120 is elastically deformed. The convex deformation of the heat transfer partition 104 is suppressed, and the heat transfer partition 104 and the heater layer 150 are in surface contact uniformly. Therefore, a decrease in heat transfer efficiency and a decrease in durability of the heater layer 150 due to non-uniformity in the pressure distribution on the contact surface described in the comparative example described above are prevented.

<Third embodiment>
Next, a chemical heat storage reactor according to a third embodiment of the present invention will be described with reference to FIGS. 9 and 10. In addition, the same code | symbol is attached | subjected to the member same as 1st embodiment and 2nd embodiment, and the overlapping description is abbreviate | omitted.

  The chemical heat storage reactor 300 has a configuration in which a heater layer 150, a heat storage layer 110, a vapor diffusion layer 120, and a medium flow path layer 320 are provided in a reaction container 103 in a layered manner.

  The reaction vessel 103 is provided with heat transfer partition walls 107 opposite to both outer sides of the heat transfer partition wall 104 in the wall thickness direction. A space (slit) 109 between the heat transfer partition 104 and the heat transfer partition 107 is formed, and a metal corrugated structure (fin) 322 is provided therein. Further, since the corrugated uneven direction of the structure 322 is the wall thickness direction S, the structure 322 is elastically deformed in the wall thickness direction S.

  The medium flow path layer 320 is filled with a heated medium 324 that can exchange heat with the heat storage layer 150. The heated medium 324 is a fluid that can exchange heat with the heat storage layer 150, such as a liquid such as water or a gas such as air. Further, the heated medium 324 is configured to flow into and out of the medium flow path layer 320 via an external flow path or the like not shown.

  The configuration other than the presence or absence of the medium flow path layer 320 is the same as that of the first embodiment.

[Action and effect]
Next, the operation and effect of this embodiment will be described.

  During the hydration reaction, the temperature of the heat storage layer 110 is controlled by exchanging heat with the heated medium 324 flowing from the heat storage layer 110 through the heat transfer partition wall 107 to the medium flow path layer 320, and a fast reaction rate is achieved. Can be maintained. Further, by transporting the heated medium 324 to an external warm air target, the warm air target can be heated and heated. That is, the heat radiated by the heat storage layer 110 can be transported.

  In addition, after the dehydration reaction is completed, the heated medium 324 is caused to flow into the medium flow path layer 320, and the sensible heat of the heat storage layer 110, the heater layer 150, and the vapor diffusion layer 120 is recovered by heat exchange, so that the external warm air It is also possible to transport heat to the object.

  During the dehydration reaction, the heat transferred from the heater layer 150 to the heat transfer partition 104 is transferred to the heat transfer partition 107 via the structure 322 of the medium flow path layer 320, and the heat transfer partition 107 stores heat. Heat is transferred to the layer 150.

  Further, as shown in FIG. 10, the heat transfer partition wall 107 having both ends fixed may swell and deform into a convex shape due to thermal expansion of the heat storage layer 110 during the dehydration reaction. However, the structural body 322 provided in the medium flow path layer 320 between the heat transfer partition wall 107 and the heat transfer partition wall 104 is elastically deformed in the wall thickness direction S, so that the heater layer 150 and the heat transfer partition wall 104 The pressure distribution on the contact surface becomes uniform. Therefore, the contact thermal resistance is reduced and the heat transfer promoting function is improved.

<Fourth embodiment>
Next, a chemical heat storage reactor according to a fourth embodiment of the present invention will be described with reference to FIGS. 11 and 12. In addition, the same code | symbol is attached | subjected to the same member as 1st embodiment-3rd embodiment, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 12, a chemical heat storage reactor 400 is configured such that a heater layer 450, a heat storage layer 110, and a vapor diffusion layer 120 are provided in a reaction container 102 in a layered manner.

  As shown in FIG. 11, the heater layer 450 is formed with a plurality of circular through holes 452 penetrating in the wall thickness direction S. In other words, it is a punched shape in which a plurality of through holes 452 are formed. Reinforcing members 460 are inserted into the respective through holes 452.

  The reinforcing member 460 is made of ceramic and has a hollow cylindrical shape. As described above, the reinforcing member 460 is made of a material and a shape having lower thermal conductivity and lower heat capacity (heat capacity including the hollow portion) than the heater layer 450.

  As shown in FIG. 12A, the length of the reinforcing member 460 in the wall thickness direction (axial direction) S is the length in the wall thickness direction S of the heater layer 450 when not heated (predetermined temperature C1 degrees or less). It is set to be longer than the thickness. And it sets so that between the heat transfer partition 104 which opposes may be supported in the wall thickness direction S. FIG.

  Further, as shown in FIG. 12B, the heater layer 450 is set to come into contact with the heat transfer partition 104 when the heater layer 450 is heated and thermally expanded during the dehydration reaction.

  The configuration other than the heater layer 450 is the same as that of the first embodiment.

[Action and effect]
Next, the operation and effect of this embodiment will be described.

  As shown in FIG. 12B, since the reinforcing member 460 supports the heat transfer partition wall 104 together with the heater layer 150 against the thermal expansion of the heat storage layer 110 during the dehydration reaction, the stress applied to the heater layer 150 is reduced. As a result, the pressure distribution on the contact surface between the heater layer 150 and the heat transfer partition 104 is made uniform. Therefore, the contact thermal resistance is reduced and the heat transfer promoting function is improved.

  Further, the heat transfer partition 104 is deformed into a convex shape and the contact surface pressure distribution becomes non-uniform, so that bending stress is generated on the heater layer 150 and the contact surface pressure distribution becomes non-uniform. Generation | occurrence | production of a temperature rising part is suppressed, As a result, the durability performance of the heater layer 150 improves.

  Expansion and deformation of the heat transfer partition 104 due to thermal expansion of the heat storage layer 150 during the hydration reaction are suppressed or prevented by the reinforcement member 460 supporting the heat transfer partition 104. As a result, the heat transfer partition 104 and the heater layer are suppressed. Partial contact with 150 is prevented, and the air layer 108 is ensured. Therefore, the heat transfer blocking function (heat insulating function) by the air layer 108 is effectively exhibited. That is, the heat conduction blocking performance between the heater layer 150 and the heat storage layer 110 during the hydration reaction is improved. Therefore, heat transfer from the heat storage layer 110 to the heater layer 150 is suppressed, and sensible heat loss is reduced.

  In addition, the reinforcing member 460 is made of ceramic and has a hollow cylindrical shape, so that it has a lower heat conductive member and a lower heat capacity than the heater layer 150. Therefore, heat transfer from the heat storage layer 150 to the reinforcing member 460 and heat transfer to the heater layer 150 during the hydration reaction are suppressed, and as a result, sensible heat loss is reduced.

  In the present embodiment, the reinforcing member 460 is made of ceramic and has a hollow cylindrical shape, so that it has a lower thermal conductivity member and a lower thermal heat capacity (heat capacity including a hollow portion) than the heater layer 150. . However, materials and shapes other than ceramics and hollow cylinders may be used.

<Others>
In addition, this invention is not limited to the said embodiment.

  For example, in the above embodiment, the structures 122 and 322 provided in the vapor diffusion layer 120 and the medium flow path layer 320 have a metal corrugated shape, but are not limited thereto. Any material or shape may be used as long as it is capable of circulating steam or a medium to be heated 324 (fluid such as air or water) and elastically deforms in the wall thickness direction S. For example, an elastically deformable porous body made of a plate-shaped metal material may be used.

  Further, for example, the medium flow path layer 320 of the third embodiment is provided between the heater layer 150 and the heat storage layer 110, but is not limited thereto. It may be provided in another place.

  Further, the plurality of embodiments described above can be implemented in combination as appropriate. For example, the medium flow path layer 320 of the third embodiment is provided in the chemical heat storage reactor of the first embodiment, the chemical heat storage reactor of the second embodiment, and the chemical heat storage reactor of the fourth embodiment. Also good.

  Alternatively, the heater layer 450 of the fourth embodiment may be used for the chemical heat storage reactor of the first embodiment, the chemical heat storage reactor of the second embodiment, and the chemical heat storage reactor of the third embodiment. .

  Moreover, you may use the plating layer 105 which improved the mold release performance formed in the wall surface 104A of the heat-transfer partition 104 of 1st embodiment for the chemical heat storage reactor of 2nd embodiment-3rd embodiment. Furthermore, the mold release performance may be improved by a method other than plating (plating layer 105). For example, the mold release performance may be improved by polishing the wall surface 104A.

  Furthermore, it cannot be overemphasized that it can implement with a various aspect in the range which does not deviate from the summary of this invention.

DESCRIPTION OF SYMBOLS 10 Chemical thermal storage system 100 Chemical thermal storage reactor 104 Heat transfer partition 105 Plating layer (mold release means)
DESCRIPTION OF SYMBOLS 110 Heat storage layer 112 Chemical heat storage material 120 Vapor diffusion layer 122 Structure 150 Heater layer 200 Chemical heat storage reactor 300 Chemical heat storage reactor 320 Medium flow path layer 322 Structure 324 Heated medium 400 Chemical heat storage reactor 452 Through-hole 460 Reinforcing member
S Wall thickness direction

Claims (7)

A heat transfer partition provided at intervals in the wall thickness direction;
A heat storage layer provided outside the heat transfer partition wall in the wall thickness direction, which stores heat by generating a dehydration reaction by heating, and is filled with a chemical heat storage material that dissipates heat by generating a hydration reaction;
Provided between the heat transfer partition walls, converts electrical energy into heat energy, has a larger coefficient of linear expansion than the heat transfer partition walls, is thinner than between the heat transfer partition walls during the hydration reaction, and heats during the dehydration reaction. A heater layer that contacts the heat transfer partition by expanding and heats the heat storage layer via the heat transfer partition;
Equipped with a chemical heat storage reactor. A vapor diffusion layer provided between the heat storage layer and the heat transfer partition, in which water vapor generated in the heat storage layer flows during a dehydration reaction, and for supplying water vapor to the heat storage layer during a hydration reaction;
A structure that is provided in the vapor diffusion layer and transfers heat from the heat transfer partition to the heat storage layer and is elastically deformable;
The chemical heat storage reactor according to claim 1, comprising: A medium flow path layer disposed so as to be in contact with the heat storage layer and filled with a heated medium capable of exchanging heat with the heat storage layer;
The chemical heat storage reactor according to claim 1 or 2. The medium flow path layer is provided between the heat storage layer and the heat transfer partition wall,
The medium flow path layer is provided with a structure capable of elastically deforming while transferring heat from the heat transfer partition to the heat storage layer.
The chemical heat storage reactor according to claim 3. A through hole penetrating the heater layer;
A reinforcing member inserted into the through hole and supporting the heat transfer partition;
A chemical heat storage reactor according to any one of claims 1 to 4, comprising: The reinforcing member is made of a material and a shape that have a low thermal conductivity member and a low thermal heat capacity than the heater layer.
The chemical heat storage reactor according to claim 5.   The chemical heat storage reactor according to any one of claims 1 to 6, wherein a release means for improving a release property is provided on a wall surface of the heat transfer partition on the heater layer side.

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