JPWO2018173545A1 - Chemical heat storage device - Google Patents
Chemical heat storage device Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/003—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using thermochemical reactions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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Abstract
本発明の課題は、化学蓄熱における熱交換時に、収納容器に保持された化学蓄熱材からの輻射熱ロスを抑制し、より蓄熱効率を向上させることが可能な化学蓄熱装置を提供することにある。上記課題を解決するために、蓄熱媒体と、前記蓄熱媒体と熱媒流体との間で熱交換を行う熱交換部と、前記蓄熱媒体と前記熱交換部を収納する収納容器と、を備え、前記蓄熱媒体と前記収納容器の間に、前記収納容器の内壁から離間して配設される第１の熱反射部材を設けることを特徴とする化学蓄熱装置を提供する。この化学蓄熱装置によれば、熱交換によって生じた蓄熱媒体からの輻射熱を、第１の熱反射部材によって蓄熱媒体側へ戻すことが可能となる。また、第１の熱反射部材を収納容器の内壁から離間して配設することで、収納容器への反応熱の吸収を抑制し、より一層の断熱効果が得られる。An object of the present invention is to provide a chemical heat storage device capable of suppressing radiation heat loss from a chemical heat storage material held in a storage container during heat exchange in chemical heat storage and further improving heat storage efficiency. In order to solve the above problems, a heat storage medium, a heat exchange unit that performs heat exchange between the heat storage medium and a heat medium fluid, and a storage container that stores the heat storage medium and the heat exchange unit, A chemical heat storage device is provided, wherein a first heat reflecting member is provided between the heat storage medium and the storage container, the first heat reflection member being disposed apart from an inner wall of the storage container. According to this chemical heat storage device, the radiant heat generated by the heat exchange from the heat storage medium can be returned to the heat storage medium by the first heat reflecting member. In addition, by disposing the first heat reflecting member away from the inner wall of the storage container, absorption of reaction heat into the storage container is suppressed, and a further heat insulating effect can be obtained.
Description
本発明は、化学蓄熱装置に関する。 The present invention relates to a chemical heat storage device.
工場やごみ焼却場等においては、膨大な量の廃熱が発生するため、省エネルギー化や未利用エネルギーの有効活用の観点から、これらの廃熱を蓄熱して利用する蓄熱システムに関する研究開発が進められている。特に、物質の化学反応を利用した化学蓄熱は、顕熱蓄熱や潜熱蓄熱に比べて蓄熱密度が非常に大きく、化学反応前後の物質が安定であれば放熱ロスもほとんどなく、長期間の蓄熱において熱損失が生じないことが知られている。 In factories and refuse incineration facilities, enormous amounts of waste heat are generated, and from the perspective of energy saving and effective use of unused energy, research and development on heat storage systems that store and use these waste heats are underway. Have been. In particular, chemical heat storage utilizing the chemical reaction of substances has a very large heat storage density compared to sensible heat storage or latent heat storage, and if the material before and after the chemical reaction is stable, there is almost no heat loss, and long-term heat storage It is known that no heat loss occurs.
例えば、特許文献１には、廃熱などの熱エネルギーを化学反応の形で熱エネルギーを蓄積する化学蓄熱材に蓄熱し、蓄熱した化学蓄熱材を保管又は熱エネルギーが必要な場所に移送して利用する化学蓄熱反応器が開示されている。
特許文献１には、化学蓄熱の具体例として、４００度を超える高温の廃熱を効率よく蓄熱するために、化学蓄熱材として水酸化カルシウム系蓄熱材を用いた系が記載されている。水酸化カルシウムに給熱流体として高温の廃熱を供給すると、脱水反応により酸化カルシウムが生成し、この反応が吸熱反応であるため蓄熱作用として発現する。一方、酸化カルシウムは、受熱流体として水（水蒸気）を供給すると、水和反応により水酸化カルシウムを生成し、この反応が発熱反応であるため放熱作用として発現するものである。
また、特許文献１には、収納容器内に複数の流体（給熱流体・受熱流体）流路が複数の化学蓄熱材と交互に配置され、化学蓄熱材と流体の熱交換の効率を上げるための受熱放熱板を流体流路に沿って配設する装置が開示されている。For example, in Patent Document 1, heat energy such as waste heat is stored in a chemical heat storage material that stores heat energy in the form of a chemical reaction, and the stored chemical heat storage material is stored or transferred to a place where heat energy is required. A chemical thermal storage reactor for use is disclosed.
Patent Document 1 discloses, as a specific example of chemical heat storage, a system using a calcium hydroxide-based heat storage material as a chemical heat storage material in order to efficiently store high-temperature waste heat exceeding 400 degrees. When high-temperature waste heat is supplied to calcium hydroxide as a heat-supplying fluid, calcium oxide is generated by a dehydration reaction, and since this reaction is an endothermic reaction, it appears as a heat storage effect. On the other hand, calcium oxide, when water (steam) is supplied as a heat receiving fluid, generates calcium hydroxide by a hydration reaction, and since this reaction is an exothermic reaction, it manifests itself as a heat radiation effect.
Further, in Patent Document 1, a plurality of fluid (heat supply fluid / heat receiving fluid) flow paths are alternately arranged with a plurality of chemical heat storage materials in a storage container to improve the efficiency of heat exchange between the chemical heat storage material and the fluid. A device for disposing the heat receiving and radiating plate along the fluid flow path is disclosed.
従来の化学蓄熱装置では、化学蓄熱材の選択及び化学蓄熱材と流体の熱交換効率を向上させる構成によって、廃熱の有効活用が行われていた。しかしながら、４００度を超える高温廃熱を蓄熱するためには、当然ながら高温での熱交換を行うことになるため、化学蓄熱材を保持する保持部材そのものからの輻射熱ロスが無視できなくなってくる。
そこで、本発明の課題は、化学蓄熱における熱交換時に、収納容器内に保持された化学蓄熱材からの輻射熱ロスを抑制し、より蓄熱効率を向上させることが可能な化学蓄熱装置を提供することにある。In a conventional chemical heat storage device, waste heat is effectively used by selecting the chemical heat storage material and improving the heat exchange efficiency between the chemical heat storage material and the fluid. However, in order to store high-temperature waste heat exceeding 400 ° C., heat exchange must be performed at a high temperature, and radiation heat loss from the holding member itself that holds the chemical heat storage material cannot be ignored.
Therefore, an object of the present invention is to provide a chemical heat storage device capable of suppressing radiation heat loss from a chemical heat storage material held in a storage container during heat exchange in chemical heat storage and further improving heat storage efficiency. It is in.
上記の課題について鋭意検討した結果、化学蓄熱装置において、収納容器と化学蓄熱材との間に輻射抑制の熱反射部材を設けることにより、蓄熱効率を向上させることができることを見出して、本発明を完成した。
すなわち、本発明は、以下の化学蓄熱装置である。As a result of intensive studies on the above problems, the present inventors have found that in a chemical heat storage device, by providing a heat reflection member for suppressing radiation between the storage container and the chemical heat storage material, it is possible to improve the heat storage efficiency, and to provide the present invention. completed.
That is, the present invention is the following chemical heat storage device.
上記課題を解決するための本発明の化学蓄熱装置は、蓄熱時には、蓄熱媒体を加熱して蓄熱生成物と生成流体に分離し、放熱時には、前記蓄熱生成物と反応流体を反応させて前記蓄熱媒体を生成する化学蓄熱装置であって、前記蓄熱媒体と、熱媒流体が通過し、前記蓄熱媒体と前記熱媒流体との間で熱交換を行う熱交換部と、前記蓄熱媒体と前記熱交換部を収納し、前記熱交換部に外部から熱媒流体を供給する供給口、及び、前記蓄熱媒体と熱交換した熱媒流体を外部へ排出する排出口を有する収納容器と、を備え、前記蓄熱媒体と前記収納容器の間に第１の熱反射部材を設け、前記第１の熱反射部材は前記収納容器の内壁から離間して配設されることを特徴とするものである。 The chemical heat storage device of the present invention for solving the above-mentioned problem heats a heat storage medium to separate a heat storage product and a generated fluid at the time of heat storage, and reacts the heat storage product and a reaction fluid at the time of heat release to cause the heat storage to react. A chemical heat storage device that generates a medium, the heat storage medium, a heat exchange unit that passes a heat medium fluid, and performs heat exchange between the heat storage medium and the heat medium fluid, the heat storage medium and the heat A supply container for storing a heat exchange unit, supplying a heat medium fluid from the outside to the heat exchange unit, and a storage container having an outlet for discharging the heat medium fluid that has exchanged heat with the heat storage medium to the outside, A first heat reflection member is provided between the heat storage medium and the storage container, and the first heat reflection member is disposed apart from an inner wall of the storage container.
この化学蓄熱装置によれば、熱交換によって生じた蓄熱媒体からの輻射熱を、第１の熱反射部材によって蓄熱媒体側へ戻すことが可能となる。また、第１の熱反射部材を収納容器の内壁から離間して配設することで、収納容器に輻射熱が吸収されるのを抑制するとともに、第１の熱反射部材と収納容器の間に空気層が形成され、より一層の断熱効果が得られる。 According to this chemical heat storage device, the radiant heat generated by the heat exchange from the heat storage medium can be returned to the heat storage medium by the first heat reflecting member. Further, by disposing the first heat reflection member at a distance from the inner wall of the storage container, it is possible to prevent the radiation heat from being absorbed by the storage container and to prevent air from being absorbed between the first heat reflection member and the storage container. A layer is formed, and a further heat insulating effect is obtained.
更に、本発明の化学蓄熱装置の一実施態様としては、第１の熱反射部材は、第１の通気部を有することを特徴とするものである。
化学蓄熱材と生成・反応流体の結合・脱離を必要とする化学蓄熱においては、熱遮蔽と同時に反応後の気体の移動自由度を高くすることが望ましい。この特徴によれば、反応後の生成流体の移動経路が形成されるため、蓄熱媒体と生成気体の分離が可能となる。Further, as one embodiment of the chemical heat storage device of the present invention, the first heat reflecting member has a first ventilation part.
In chemical heat storage that requires the binding and desorption of a chemical heat storage material and a production / reaction fluid, it is desirable to increase the degree of freedom of movement of the gas after the reaction at the same time as heat shielding. According to this feature, since the movement path of the product fluid after the reaction is formed, the heat storage medium and the product gas can be separated.
更に、本発明の化学蓄熱装置の一実施態様としては、第１の熱反射部材の第１の通気部は、前記第１の熱反射部材に形成したスリット又は孔であることを特徴とするものである。
この特徴によれば、簡易な構成で反応後の生成流体の移動経路を形成することができる。Furthermore, as one embodiment of the chemical heat storage device of the present invention, the first ventilation portion of the first heat reflection member is a slit or a hole formed in the first heat reflection member. It is.
According to this feature, a movement path of the product fluid after the reaction can be formed with a simple configuration.
更に、本発明の化学蓄熱装置の一実施態様としては、第１の熱反射部材と収納容器の間に、第２の熱反射部材を設け、第２の熱反射部材は前記第１の熱反射部材と前記収納容器の内壁の両方と離間して配設することを特徴とするものである。
この特徴によれば、第１の熱反射部材及び第１の通気部から放出される輻射熱を第２の熱反射部材によって蓄熱媒体側に戻すことが可能となるため、より熱遮蔽の効果を向上させることができる。Further, as one embodiment of the chemical heat storage device of the present invention, a second heat reflection member is provided between the first heat reflection member and the storage container, and the second heat reflection member is provided with the first heat reflection member. It is characterized in that it is disposed apart from both the member and the inner wall of the storage container.
According to this feature, since the radiant heat emitted from the first heat reflecting member and the first ventilation portion can be returned to the heat storage medium side by the second heat reflecting member, the heat shielding effect is further improved. Can be done.
更に、本発明の化学蓄熱装置の一実施態様としては、第２の熱反射部材は、第２の通気部を備え、前記第２の通気部は前記第１の熱反射部材の第１の通気部と重なり合わないように配設することを特徴とするものである。
この特徴によれば、第１の通気部から放射された輻射熱が第２の通気部から通過することなく、第２の熱反射部材によって蓄熱媒体側に戻すことが可能となるため、より熱遮蔽の効果を向上させることができる。Further, as one embodiment of the chemical heat storage device of the present invention, the second heat reflection member includes a second ventilation portion, and the second ventilation portion is provided with the first ventilation portion of the first heat reflection member. It is characterized in that it is arranged so as not to overlap with the parts.
According to this feature, the radiant heat radiated from the first ventilation portion can be returned to the heat storage medium side by the second heat reflection member without passing through the second ventilation portion. Can be improved.
本発明の化学蓄熱装置によれば、蓄熱時において収納容器内に保持された蓄熱媒体からの輻射による収納容器への熱放出を抑制することができる。これにより、蓄熱効率を向上させることができる。 According to the chemical heat storage device of the present invention, it is possible to suppress heat release to the storage container due to radiation from the heat storage medium held in the storage container during heat storage. Thereby, heat storage efficiency can be improved.
この発明の実施形態を、添付図面を参照して詳細に説明する。 Embodiments of the present invention will be described in detail with reference to the accompanying drawings.
［化学蓄熱装置］
本発明の化学蓄熱装置は、蓄熱時には、蓄熱媒体を加熱して蓄熱生成物と生成流体に分離し、放熱時には、前記蓄熱生成物と反応流体を反応させて前記蓄熱媒体を生成する化学蓄熱装置であり、工場やごみ焼却場等から発生する廃熱を蓄熱媒体に貯蔵して、熱を必要とする熱需要地まで輸送が可能な装置である。[Chemical heat storage device]
The chemical heat storage device of the present invention heats a heat storage medium during heat storage and separates the heat storage product and a generated fluid, and reacts the heat storage product and a reaction fluid during heat release to generate the heat storage medium. It is a device that stores waste heat generated from factories, waste incineration plants, and the like in a heat storage medium and can transport it to a heat demanding area that requires heat.
本発明の蓄熱装置の構成としては、蓄熱媒体と、熱媒流体が通過し、前記蓄熱媒体と前記熱媒流体との間で熱交換を行う熱交換部と、前記蓄熱媒体と前記熱交換部を収納し、前記熱交換部に外部から熱媒流体を供給する供給口、及び、前記蓄熱媒体と熱交換した熱媒流体を外部へ排出する排出口を有する収納容器とを備え、前記蓄熱媒体と前記収納容器の間に、前記収納容器の内壁から離間して配設する第１の熱反射部材を備えている。 As a configuration of the heat storage device of the present invention, a heat storage medium, a heat exchange unit through which a heat medium fluid passes, and performs heat exchange between the heat storage medium and the heat medium fluid, the heat storage medium and the heat exchange unit And a storage container having a supply port that supplies a heat medium fluid from the outside to the heat exchange unit, and a discharge container that discharges the heat medium fluid that has exchanged heat with the heat storage medium to the outside, wherein the heat storage medium is provided. A first heat reflection member disposed between the first container and the storage container so as to be separated from an inner wall of the storage container.
〔第一の実施態様〕
図１は、本発明の第一の実施態様の蓄熱装置１ａの構造を示す概略説明図である。この蓄熱装置１ａは、蓄熱媒体４と、蓄熱媒体４を保持する保持部材５を収納する収納容器２を備え、収納容器２の内部には蓄熱媒体４と熱交換を行う外部からの熱媒流体が通過する熱交換部３が設けられている。また、収納容器２には、熱媒流体を外部から供給する流体供給口８及び熱媒流体を外部に排出する流体排出口９が設けられている。更に、収納容器２と保持部材５の間には、収納容器２の内壁から離間して第１の熱反射部材６を配設している。
以下に、各構成について詳細に説明する。(First embodiment)
FIG. 1 is a schematic explanatory view showing the structure of a heat storage device 1a according to a first embodiment of the present invention. This heat storage device 1a includes a heat storage medium 4 and a storage container 2 that stores a holding member 5 that holds the heat storage medium 4, and a heat medium fluid from the outside that exchanges heat with the heat storage medium 4 inside the storage container 2. Is provided with a heat exchange unit 3 through which the heat exchanger 3 passes. The storage container 2 is provided with a fluid supply port 8 for supplying a heat medium fluid from the outside and a fluid discharge port 9 for discharging the heat medium fluid to the outside. Further, a first heat reflection member 6 is provided between the storage container 2 and the holding member 5 so as to be separated from the inner wall of the storage container 2.
Hereinafter, each configuration will be described in detail.
（蓄熱媒体）
蓄熱媒体４とは、加熱時に蓄熱生成物と生成流体に分離され、また、この逆の反応により熱を放出する化学物質である。例えば、蓄熱生成物と生成流体として、酸化カルシウム（ＣａＯ）と水蒸気（Ｈ２Ｏ）、塩化カルシウム（ＣａＣｌ２）と水蒸気（Ｈ２Ｏ）、臭化カルシウム（ＣａＢｒ２）と水蒸気（Ｈ２Ｏ）、ヨウ化カルシウム（ＣａＩ２）と水蒸気（Ｈ２Ｏ）、酸化マグネシウム（ＭｇＯ）と水蒸気（Ｈ２Ｏ）、塩化マグネシウム（ＭｇＣｌ２）と水蒸気（Ｈ２Ｏ）、塩化亜鉛（ＺｎＣｌ２）と水蒸気（Ｈ２Ｏ）、塩化ストロンチウム（ＳｒＣｌ２）とアンモニア（ＮＨ３）、臭化ストロンチウム（ＳｒＢｒ２）とアンモニア（ＮＨ３）、酸化カルシウム（ＣａＯ）と二酸化炭素（ＣＯ２）、酸化マグネシウム（ＭｇＯ）と二酸化炭素等（ＣＯ２）が挙げられる。取り扱いが容易であるという観点から、蓄熱媒体４は、生成流体及び反応流体として水蒸気を利用するものであることが好ましい。
また、本発明における化学蓄熱装置は、高温での化学蓄熱時に特に効果を発揮する構成であるため、本発明における蓄熱媒体４としては、高温での化学蓄熱が可能な蓄熱生成物と生成流体として、酸化カルシウムと水蒸気の組み合わせ（４００〜５００度）や酸化マグネシウムと水蒸気の組み合わせ（３００〜４００度）を用いることが好ましい。(Heat storage medium)
The heat storage medium 4 is a chemical substance that is separated into a heat storage product and a generated fluid when heated, and that releases heat by the reverse reaction. For example, as a heat storage product and a generated fluid, calcium oxide (CaO) and steam (H 2 O), calcium chloride (CaCl 2 ) and steam (H 2 O), calcium bromide (CaBr 2 ) and steam (H 2 O) ), Calcium iodide (CaI 2 ) and steam (H 2 O), magnesium oxide (MgO) and steam (H 2 O), magnesium chloride (MgCl 2 ) and steam (H 2 O), zinc chloride (ZnCl 2 ) And water vapor (H 2 O), strontium chloride (SrCl 2 ) and ammonia (NH 3 ), strontium bromide (SrBr 2 ) and ammonia (NH 3 ), calcium oxide (CaO) and carbon dioxide (CO 2 ), magnesium oxide (MgO) and carbon dioxide (CO 2 ). From the viewpoint of easy handling, it is preferable that the heat storage medium 4 uses steam as a generated fluid and a reaction fluid.
Further, since the chemical heat storage device of the present invention has a configuration particularly effective at the time of chemical heat storage at a high temperature, the heat storage medium 4 of the present invention includes a heat storage product capable of chemically storing heat at a high temperature and a generated fluid. It is preferable to use a combination of calcium oxide and steam (400 to 500 degrees) or a combination of magnesium oxide and steam (300 to 400 degrees).
本発明における蓄熱媒体４の構造及び形状については、特に限定するものではなく、粉体、粉体を成形した成形体、または蓄熱媒体４を多孔質体に担持させたものであってもよい。 The structure and shape of the heat storage medium 4 in the present invention are not particularly limited, and may be a powder, a molded article obtained by molding a powder, or a material in which the heat storage medium 4 is supported on a porous body.
蓄熱媒体４を保持する保持部材５の構造は、収納容器２内で蓄熱媒体４を保持し、かつ蓄熱媒体４と熱交換部３との間で熱交換を可能とする構造のものであれば、特に限定されない。図１には、１つの容器内に蓄熱媒体４を収納した構造を例示したが、これに限定されるものではなく、例えば、蓄熱媒体４を収納した箱状容器やトレイ状容器を複数積み重ねる構成としてもよい。
また、保持部材５の材質は、高温処理に耐えられるものであれば、特に限定されない。The structure of the holding member 5 that holds the heat storage medium 4 is a structure that holds the heat storage medium 4 in the storage container 2 and enables heat exchange between the heat storage medium 4 and the heat exchange unit 3. Is not particularly limited. FIG. 1 illustrates a structure in which the heat storage medium 4 is housed in one container, but is not limited thereto. For example, a configuration in which a plurality of box-shaped containers or tray-shaped containers housing the heat storage medium 4 are stacked. It may be.
The material of the holding member 5 is not particularly limited as long as it can withstand high-temperature processing.
（収納容器）
収納容器２は、蓄熱媒体４を収納するための構成であり、密閉可能な構造物からなる。収納容器２には、内部に収納された蓄熱媒体４と外部との熱の伝達を行うための流体が通過する熱交換部３、該熱交換部３に熱交換を行う外部からの熱媒流体を供給するための流体供給口８、熱交換部３から該流体を排出するための流体排出口９を有する。(Storage container)
The storage container 2 is a configuration for storing the heat storage medium 4 and is formed of a sealable structure. The storage container 2 includes a heat exchange unit 3 through which a fluid for transferring heat between the heat storage medium 4 stored therein and the outside passes, and a heat medium fluid from the outside that performs heat exchange with the heat exchange unit 3 And a fluid discharge port 9 for discharging the fluid from the heat exchange unit 3.
熱交換部３は、保持部材５内部に収納された蓄熱媒体４と外部からの熱媒流体との熱の伝達を行うことができれば、どのような形状のものでもよく、例えば、保持部材５の内部に蛇行して設置された熱交換チューブや、保持部材５に対する２重円筒型の内筒部などにより構成される。 The heat exchange unit 3 may be of any shape as long as it can transfer heat between the heat storage medium 4 housed inside the holding member 5 and the heat medium fluid from the outside. It is constituted by a heat exchange tube installed meandering inside, a double cylindrical inner cylinder portion for the holding member 5, and the like.
流体供給口８と流体排出口９は、それぞれ収納容器２に対して異なる面に配置してもよいし、同一面に配置してもよい。例えば、図１に示すように、収納容器２の中心軸に沿って、収納容器２の下部には流体供給口８を設け、収納容器２の上部には流体排出口９を設ける構成としてもよい。また、収納容器２の同一面に流体供給口８と流体排出口９を設ける構成とし、流体の供給、排出を１つの面で行うことにより、蓄熱装置１ａ全体としての構造がコンパクトになるため、蓄熱装置１の設置箇所の選択肢を広げることが可能となる。 The fluid supply port 8 and the fluid discharge port 9 may be respectively arranged on different surfaces with respect to the storage container 2 or may be arranged on the same surface. For example, as shown in FIG. 1, along the central axis of the storage container 2, a fluid supply port 8 may be provided at a lower portion of the storage container 2, and a fluid outlet 9 may be provided at an upper portion of the storage container 2. . Further, since the fluid supply port 8 and the fluid discharge port 9 are provided on the same surface of the storage container 2 and the supply and discharge of the fluid are performed on one surface, the structure of the heat storage device 1a as a whole becomes compact. It is possible to expand the choices of the installation location of the heat storage device 1.
また、収納容器２には、蓄熱時に蓄熱媒体４から発生した生成流体を大気に放出するための大気開放口１０、放熱時に蓄熱生成物と反応する反応流体を供給するための給気口１１を備えている。なお、第一の実施態様の蓄熱装置１ａでは、大気開放口１０と給気口１１は同一の通気口を使用しているが、別の位置に設けてもよい。 The storage container 2 has an atmosphere opening port 10 for releasing a generated fluid generated from the heat storage medium 4 to the atmosphere during heat storage, and an air supply port 11 for supplying a reaction fluid that reacts with the heat storage product during heat release. Have. In the heat storage device 1a of the first embodiment, the air opening port 10 and the air supply port 11 use the same ventilation port, but they may be provided at different positions.
大気開放口１０は、蓄熱時に開放され、蓄熱媒体４から発生した生成流体を収納容器２の外部に排出するための構成であるが、生成流体を凝集して回収する受液槽を設ける構成としてもよい。該大気開放口１０を有することにより、生成流体は外部に放出されるため、生成流体を凝集して回収する受液槽を設ける必要がなく、また、生成流体を熱供給地から熱需要地に輸送する必要もない。そのため、装置のコンパクト化、輸送コストの低下等の利点がある。 The open-to-atmosphere port 10 is configured to be opened at the time of heat storage and to discharge the generated fluid generated from the heat storage medium 4 to the outside of the storage container 2. Is also good. By having the atmosphere opening port 10, the generated fluid is discharged to the outside, so that there is no need to provide a liquid receiving tank for collecting and collecting the generated fluid, and the generated fluid is transferred from the heat supply area to the heat demand area. No need to transport. Therefore, there are advantages such as downsizing of the apparatus and reduction of transportation cost.
給気口１１は、放熱時に開放され、反応流体を収納容器２に供給するための構成であり、放熱時には、反応流体を供給するための供給部（不図示）と連結する。 The air supply port 11 is opened at the time of heat radiation and is configured to supply a reaction fluid to the storage container 2, and is connected to a supply unit (not shown) for supplying the reaction fluid at the time of heat radiation.
熱媒流体としては、蓄熱媒体４に熱を供給することができる温度のものであればよく、気体や液体等の流体が好ましい。更に取り扱い性に優れるという観点でみれば、気体を使用することが特に好ましい。 The heat medium fluid may be any fluid that can supply heat to the heat storage medium 4, and is preferably a fluid such as a gas or a liquid. From the viewpoint of further excellent handling properties, it is particularly preferable to use a gas.
（第１の熱反射部材）
第１の熱反射部材６は、収納容器２と蓄熱媒体４の間に設けられ、かつ収納容器２の内壁から離間して配設されている。(First heat reflection member)
The first heat reflection member 6 is provided between the storage container 2 and the heat storage medium 4 and is spaced apart from the inner wall of the storage container 2.
第１の熱反射部材６は、蓄熱時において蓄熱媒体４を保持する保持部材５から放出される輻射熱を再度蓄熱媒体４側へ反射させるための構成である。該第１の熱反射部材６を設けることにより、収納容器２への輻射熱の吸収を抑制することが可能となり、蓄熱効果が向上する。また、収納容器２の内壁から離間して配設することで、第１の熱反射部材６と収納容器２の間に空気層が形成され、より一層の断熱効果が得られる。 The first heat reflecting member 6 is configured to reflect the radiant heat released from the holding member 5 holding the heat storage medium 4 during the heat storage to the heat storage medium 4 again. By providing the first heat reflection member 6, it becomes possible to suppress the absorption of radiant heat into the storage container 2, and the heat storage effect is improved. Further, by arranging the storage container 2 away from the inner wall, an air layer is formed between the first heat reflection member 6 and the storage container 2, and a further heat insulating effect can be obtained.
第１の熱反射部材６の具体的な構造は、保持部材５から放出される輻射熱を蓄熱媒体４側へ反射させるための構成であれば特に制限されず、図１に示すように、例えば保持部材５全体を囲うような箱状構造や、保持部材５の周囲を囲うように配置された筒型構造であってもよい。また、第１の熱反射部材６は、保持部材５の周囲を囲う筒型の構造と、保持部材５の上下いずれかを覆う構造とを組み合わせた構成としてもよい。更に、第１の熱反射部材６は、蓄熱媒体４側へ熱が効果的に集まるように、曲面を有する構造であってもよい。 The specific structure of the first heat reflecting member 6 is not particularly limited as long as it is a structure for reflecting the radiant heat emitted from the holding member 5 to the heat storage medium 4 side. For example, as shown in FIG. A box-shaped structure that surrounds the entire member 5 or a tubular structure that is arranged to surround the periphery of the holding member 5 may be used. Further, the first heat reflection member 6 may be configured to combine a cylindrical structure surrounding the periphery of the holding member 5 and a structure covering one of the upper and lower sides of the holding member 5. Furthermore, the first heat reflection member 6 may have a structure having a curved surface so that heat is effectively collected toward the heat storage medium 4.
第１の熱反射部材６は、輻射熱を反射可能な材質からなるものである。このような材質は、金属としては、アルミニウム、鉄、銅、黄銅、銀、金、白金、ニッケル、ステンレス、クロム、タングステンなどが挙げられる。また、非金属としては、石英ガラス、アルミナセラミクス、マグネシアセラミクス、耐火レンガなどが挙げられる。 The first heat reflecting member 6 is made of a material capable of reflecting radiant heat. Examples of such materials include aluminum, iron, copper, brass, silver, gold, platinum, nickel, stainless steel, chromium, and tungsten. Examples of the nonmetal include quartz glass, alumina ceramics, magnesia ceramics, and firebricks.
また、本発明における第１の熱反射部材６として、上記材質の放射率を考慮して選択することが望ましい。反射率＝１−放射率の関係から、低放射率であるほど高反射率を有する材質となる。放射率は、放射体の放射発散度とその放射体と同温度の黒体の放射発散度との比としてＪＩＳＺ８１１７で定義される値であり、放射率測定値は、ＪＩＳＲ１８０１に規定されているＦＴＩＲによる分光放射率測定などによって得られるものである。なお、放射率は温度に依存するパラメータである。
また、材質の放射率は、材質の表面状態にも依存する。表面に凹凸が少ないほど低い放射率を示すため、特に金属材質において、酸化面、粗面よりは研磨面を有するものがより好ましい。
本発明における第１の熱反射部材６としては、蓄熱時の温度における材質の放射率が０．５以下、より好ましくは０．１以下、更に好ましくは０．０５以下のものを用いる。Further, it is desirable that the first heat reflection member 6 in the present invention be selected in consideration of the emissivity of the above material. From the relationship of reflectivity = 1-emissivity, a material with a lower emissivity has a higher reflectivity. The emissivity is a value defined by JISZ8117 as a ratio between the radiant emittance of the radiator and the radiant emittance of a black body at the same temperature as the radiator, and the measured emissivity is FTIR specified in JISR1801. It can be obtained by a spectral emissivity measurement or the like. The emissivity is a parameter that depends on the temperature.
The emissivity of the material also depends on the surface condition of the material. Since the lower the unevenness on the surface, the lower the emissivity, the metal material is preferably a polished surface rather than an oxidized surface or a rough surface.
As the first heat reflection member 6 in the present invention, a material having an emissivity of 0.5 or less, more preferably 0.1 or less, and still more preferably 0.05 or less at a temperature during heat storage is used.
［蓄熱装置のその他の態様］
以下に、蓄熱装置の別の態様について例示する。
〔第二の実施態様〕
図２は、本発明の第二の実施態様の蓄熱装置１ｂの構造を示す概略説明図である。
この蓄熱装置１ｂは、第一の実施態様の蓄熱装置１ａにおいて、第１の熱反射部材６に、第１の通気部６１を設ける構成としたものである。化学蓄熱材と生成・反応流体の結合・脱離を必要とする化学蓄熱においては、熱遮蔽と同時に気体の移動自由度を高くすることが望ましい。この蓄熱装置１ｂによれば、反応後の生成流体の移動経路が形成されるため、蓄熱媒体と生成流体の分離が効率的に行われ、熱交換効率を向上させることができる。[Other aspects of heat storage device]
Hereinafter, another embodiment of the heat storage device will be exemplified.
(Second embodiment)
FIG. 2 is a schematic explanatory view showing the structure of the heat storage device 1b according to the second embodiment of the present invention.
The heat storage device 1b has a configuration in which the first heat reflection member 6 is provided with a first ventilation portion 61 in the heat storage device 1a of the first embodiment. In chemical heat storage that requires coupling and desorption of a chemical heat storage material and a generated / reacted fluid, it is desirable to increase the degree of freedom of gas movement simultaneously with heat shielding. According to the heat storage device 1b, since the movement path of the product fluid after the reaction is formed, the heat storage medium and the product fluid are efficiently separated, and the heat exchange efficiency can be improved.
第二の実施態様の蓄熱装置１ｂにおける第１の熱反射部材６に第１の通気部６１を設ける構成としては、図２に示すように、複数の板状部材をルーバー状に配置する構成や、板状部材に通気口としてスリットや孔を開けるなどの構成とすることができる。
特に、本発明における第１の通気部６１としては、板状部材に通気口を設ける構成とすることが好ましい。この構成とすることで、簡易な構成で蓄熱媒体から生成流体の分離を誘導することが可能となる。As a configuration in which the first ventilation section 61 is provided in the first heat reflecting member 6 in the heat storage device 1b of the second embodiment, as shown in FIG. 2, a configuration in which a plurality of plate-like members are arranged in a louver shape, Alternatively, a slit or a hole may be formed as a vent in the plate member.
In particular, as the first ventilation section 61 in the present invention, it is preferable to adopt a configuration in which a ventilation hole is provided in a plate-shaped member. With this configuration, it is possible to induce the separation of the generated fluid from the heat storage medium with a simple configuration.
〔第三の実施態様〕
図３は、本発明の第三の実施態様の蓄熱装置１ｃの構造を示す概略説明図である。
この蓄熱装置１ｃは、第一の実施態様の蓄熱装置１ｂにおいて、第１の熱反射部材６の外側に、第２の熱反射部材７を設け、第２の熱反射部材７は、収納容器２の内壁及び第１の熱反射部材６と離間して配設される構成としたものである。この蓄熱装置１ｃによれば、第１の熱反射部材６を通過して放出される輻射熱、又は、第１の通気部６１から放出される輻射熱についても蓄熱媒体４側へ反射させることができるため、蓄熱効果をより向上させることができる。(Third embodiment)
FIG. 3 is a schematic explanatory view showing the structure of the heat storage device 1c according to the third embodiment of the present invention.
This heat storage device 1c is different from the heat storage device 1b of the first embodiment in that a second heat reflection member 7 is provided outside the first heat reflection member 6, and the second heat reflection member 7 is And the first heat reflection member 6 is spaced apart from the inner wall. According to this heat storage device 1c, radiant heat emitted through the first heat reflecting member 6 or radiant heat emitted from the first ventilation portion 61 can also be reflected toward the heat storage medium 4. In addition, the heat storage effect can be further improved.
第２の熱反射部材７の具体的構造は、上記第１の熱反射部材６と同様に、保持部材５から放出される輻射熱を蓄熱媒体４側へ反射させるための構成であれば特に制限されず、例えば保持部材５全体を囲うような箱状構造や、保持部材５の周囲を囲うように配置された筒型構造であってもよい。また、第２の熱反射部材７は、保持部材５の周囲を囲う筒型の構造と、保持部材５の上下いずれかを覆う構造とを組み合わせた構成としてもよい。更に、第２の熱反射部材７は、蓄熱媒体４側へ熱が効果的に集まるように、曲面を有する構造であってもよい。 The specific structure of the second heat reflecting member 7 is not particularly limited as long as it is a structure for reflecting the radiant heat emitted from the holding member 5 to the heat storage medium 4 side, similarly to the first heat reflecting member 6. Instead, for example, a box-shaped structure that surrounds the entire holding member 5 or a cylindrical structure that is arranged so as to surround the periphery of the holding member 5 may be used. Further, the second heat reflecting member 7 may have a configuration in which a tubular structure surrounding the periphery of the holding member 5 and a structure covering one of the upper and lower sides of the holding member 5 are combined. Further, the second heat reflection member 7 may have a structure having a curved surface so that heat is effectively collected toward the heat storage medium 4.
第２の熱反射部材７は、輻射熱を反射可能な材質からなるものである。このような材質は、金属としては、アルミニウム、鉄、銅、黄銅、銀、金、白金、ニッケル、ステンレス、クロム、タングステンなどが挙げられる。また、非金属としては、石英ガラス、アルミナセラミクス、マグネシアセラミクス、耐火レンガなどが挙げられる。 The second heat reflection member 7 is made of a material capable of reflecting radiant heat. Examples of such materials include aluminum, iron, copper, brass, silver, gold, platinum, nickel, stainless steel, chromium, and tungsten. Examples of the nonmetal include quartz glass, alumina ceramics, magnesia ceramics, and firebricks.
また、本発明における第２の熱反射部材７として、上記材質の放射率を考慮して選択することが望ましい。
本発明における第２の熱反射部材７としては、蓄熱時の温度における材質の放射率が０．５以下、より好ましくは０．１以下、更に好ましくは０．０５以下のものを用いる。
なお、第２の熱反射部材７と第１の熱反射部材６は、同じ材質を用いてもよいし、異なる材質を用いてもよい。Further, it is desirable to select the second heat reflection member 7 in the present invention in consideration of the emissivity of the above-mentioned material.
As the second heat reflecting member 7 in the present invention, a material having an emissivity of 0.5 or less, more preferably 0.1 or less, and still more preferably 0.05 or less at a temperature during heat storage is used.
Note that the second heat reflection member 7 and the first heat reflection member 6 may use the same material or different materials.
〔第四の実施態様〕
図４は、本発明の第四の実施態様の蓄熱装置１ｄの構造を示す概略説明図である。
この蓄熱装置１ｄは、第三の実施態様の蓄熱装置１ｃにおいて、第２の熱反射部材７に、第２の通気部７１を設ける構成としたものである。この蓄熱装置１ｄによれば、２つの熱反射部材両方に反応後の生成流体の移動経路が形成されるため、蓄熱媒体と生成流体の分離が効率的に行われ、熱交換効率を向上させることができる。(Fourth embodiment)
FIG. 4 is a schematic explanatory view showing the structure of a heat storage device 1d according to a fourth embodiment of the present invention.
This heat storage device 1d has a configuration in which the second heat reflection member 7 is provided with a second ventilation portion 71 in the heat storage device 1c of the third embodiment. According to this heat storage device 1d, since the movement path of the product fluid after the reaction is formed in both of the two heat reflecting members, the heat storage medium and the product fluid are efficiently separated, and the heat exchange efficiency is improved. Can be.
第四の実施態様の蓄熱装置１ｄにおける第２の熱反射部材７に第２の通気部７１を設けた構成としては、複数の板状部材をルーバー状に配置する構成や、図４に示すように、板状部材に通気口としてスリットや孔を開けるなどの構成とすることができる。
また、本発明における第２の通気部７１の構成としては、図４に示すように、第１の通気部６１と重なり合わない構造、配置とすることが特に好ましい。この構成とすることで、第１の通気部６１から放射された輻射熱がそのまま第２の通気部７１を通過することなく、第２の熱反射部材７によって蓄熱媒体４側に戻すことが可能となるため、より熱遮蔽の効果を向上させることができる。As a configuration in which the second ventilation section 71 is provided in the second heat reflection member 7 in the heat storage device 1d of the fourth embodiment, a configuration in which a plurality of plate-like members are arranged in a louver shape, as shown in FIG. In addition, a configuration in which a slit or a hole is formed as a vent in the plate-shaped member can be adopted.
In addition, as the configuration of the second ventilation section 71 in the present invention, as shown in FIG. 4, it is particularly preferable to adopt a structure and an arrangement that do not overlap with the first ventilation section 61. With this configuration, the radiant heat radiated from the first ventilation part 61 can be returned to the heat storage medium 4 side by the second heat reflection member 7 without passing through the second ventilation part 71 as it is. Therefore, the effect of heat shielding can be further improved.
本発明の化学蓄熱装置の用途は、工場やごみ焼却場等から発生する廃熱を有効利用する方法に利用される。例えば、廃熱が発生する熱供給地において本発明の化学蓄熱装置を蓄熱し、熱が必要な熱需要地に蓄熱装置を輸送して放熱する方法に利用する。また、昼に蓄熱して、夜に放熱するというように、同一の設置場所において、廃熱が発生する時間帯に蓄熱して、熱が要求される時間帯に放熱する方法に利用することもできる。 The use of the chemical heat storage device of the present invention is used for a method of effectively utilizing waste heat generated from factories, waste incineration plants, and the like. For example, the chemical heat storage device of the present invention is stored in a heat supply place where waste heat is generated, and is used in a method of transporting the heat storage device to a heat demanding place where heat is required and dissipating heat. It is also possible to store heat during the day and dissipate heat at night, such as storing heat during the time when waste heat is generated and dissipating heat during the time when heat is required. it can.
１ａ，１ｂ，１ｃ，１ｄ…化学蓄熱装置、２…収納容器、３…熱交換部、４…蓄熱媒体、５…保持部材、６…第１の熱反射部材、６１…第１の通気部、７…第２の熱反射部材、７１…第２の通気部、８…流体供給口、９…流体排出口、１０…大気開放口、１１…給気口
1a, 1b, 1c, 1d: chemical heat storage device, 2: storage container, 3: heat exchange unit, 4: heat storage medium, 5: holding member, 6: first heat reflection member, 61: first ventilation unit, 7: second heat reflecting member, 71: second ventilation section, 8: fluid supply port, 9: fluid discharge port, 10: atmosphere opening port, 11: air supply port
Claims (5)
前記蓄熱媒体と、
熱媒流体が通過し、前記蓄熱媒体と前記熱媒流体との間で熱交換を行う熱交換部と、
前記蓄熱媒体と前記熱交換部を収納し、前記熱交換部に外部から熱媒流体を供給する供給口、及び、前記蓄熱媒体と熱交換した熱媒流体を外部へ排出する排出口を有する収納容器と、を備え、
前記蓄熱媒体と前記収納容器の間に第１の熱反射部材を設け、前記第１の熱反射部材は前記収納容器の内壁から離間して配設されることを特徴とする、化学蓄熱装置。At the time of heat storage, the heat storage medium is heated and separated into a heat storage product and a generated fluid, and at the time of heat release, a chemical heat storage device that generates the heat storage medium by reacting the heat storage product and a reaction fluid,
The heat storage medium;
A heat exchange unit through which a heat medium fluid passes and performs heat exchange between the heat storage medium and the heat medium fluid,
A storage port for storing the heat storage medium and the heat exchange section, and having a supply port for supplying a heat medium fluid from the outside to the heat exchange section, and a discharge port for discharging the heat medium fluid exchanged with the heat storage medium to the outside. And a container,
A chemical heat storage device, wherein a first heat reflection member is provided between the heat storage medium and the storage container, and the first heat reflection member is disposed apart from an inner wall of the storage container.
The second heat reflection member includes a second ventilation portion, and the second ventilation portion is disposed so as not to overlap with the first ventilation portion of the first heat reflection member. The chemical heat storage device according to claim 4, wherein
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