JP6754275B2 - Manufacturing method of heat storage device - Google Patents

Description

The present invention relates to a heat storage material that stores heat or dissipates heat, and a method for encapsulating a heat storage material in a container for enclosing a heat storage material composition in which an additive is added to the heat storage material.

Latent heat storage material (PCM: Phase Change Material) has the property of storing heat or dissipating heat by utilizing the inflow and outflow of latent heat that accompanies a phase change, and stores the waste heat that is originally discarded and requires the stored heat. Energy can be effectively utilized without waste by taking out according to the above. The latent heat storage material is housed in a heat storage tank in which a heat medium such as water is stored in a state of being sealed in a container, and heat is transferred between the latent heat storage material and the heat medium through the container, so that the latent heat is latent heat. Heat is stored in the heat storage material and heat is dissipated from the latent heat storage material to the heat medium. When filling a container with a heat storage material composition obtained by mixing such a latent heat storage material with an additive, for example, it is possible to fill the container in a state in which the adjusted latent heat storage material composition is melted and liquefied. It is disclosed in Patent Document 1.

Latent heat storage material, for example, ammonium alum dodecahydrate _{(AlNH 4 (SO 4) 2} · 12H 2 O): If [Physical Properties mp 93.5 ° C., solid at room temperature is a mineral salt hydrates such as, latent heat There are two filling methods for enclosing the heat storage material composition, which is a mixture of the heat storage material and the additive, in the container. The first filling method is to crush the latent heat storage material and the additive, respectively, and bring the powdered mixture of the latent heat storage material powder and the additive powder to a temperature exceeding the melting point of the heat storage material composition. Similar to Patent Document 1, this is a method in which a liquefied heat storage material composition is injected into a container and sealed by heating to change the phase to a liquid phase state. The second filling method is a method in which a mixture of a latent heat storage material powder and an additive powder is directly filled in a container in a powder state and sealed. When the enclosed powdery mixture is heated to a temperature exceeding the melting point of the heat storage material composition through the container by heat conduction from the heat medium in the heat storage tank, the phase changes to a liquid phase state in the container. Then, it becomes a heat storage material composition.

In general, a plurality of containers containing a latent heat storage material or the like are housed in a heat storage tank, so that the operator can use the heat storage material composition in the first filling method and the powdery mixture in the second filling method. All of these are prepared together for all the containers, divided into small portions for each container, filled in the container, and the container is sealed.

Japanese Unexamined Patent Publication No. 2014-58681

In the first filling method including Patent Document 1, the heat storage material composition in a liquid phase state in which the latent heat storage material powder and the additive powder are dissolved is divided into small portions and filled in each container. In the heat storage material composition obtained, the mixing ratio of the latent heat storage material and the additive is made uniform in each container. In this respect, the first filling method is advantageous in terms of quality control. However, in the first filling method, in order to produce a heat storage material composition in a completely liquid phase state, a powdery mixture of a latent heat storage material powder and an additive powder is used as a heat storage material composition. It must be heated to a temperature exceeding the melting point temperature of the above (for example, about 100 ° C.), and a heating facility for heating is required only for filling the container with the heat storage material composition. In addition, when the powdery mixture is heated to about 100 ° C. and melted, a large amount of heat energy is required at the time of heating, safety measures for the operator are also required, and the work time associated with the heating is extra. Therefore, there is a problem that the heat storage material composition cannot be efficiently sealed in the container.

On the other hand, in the second filling method, even if the latent heat storage material in the form of finely crushed powder is uniformly agitated, or the powder of the latent heat storage material and the powder of the additive are uniformly mixed. Even in the form of a mixture, a physical gap (gap) is inevitably generated between adjacent powders. When the gap is present in the container, the heat that is electrically conducted between the latent heat storage material and the heat medium is conducted through the gap in addition to the container, so that the time required for heat conduction becomes longer. In particular, when heat storage and heat dissipation by a latent heat storage material are used as a heat source (energy source) for hot water supply equipment, air conditioning equipment, etc., the usability of the hot water supply equipment, etc. is affected.

The present invention has been made to solve the above problems, and when the heat storage material or the heat storage material composition in which the additive is mixed with the heat storage material is sealed in the container, the heat storage material is used. A heat storage material that can efficiently conduct the process until the heat storage material is sealed in the container, and can efficiently conduct heat between the heat medium in the tank and the heat storage material, etc. in the heat storage tank using the heat storage material, etc. It is an object of the present invention to provide a method for encapsulating the inside of a container.

In order to achieve the above object, the method for encapsulating the heat storage material in a container according to the present invention has the following configuration.
(1) In a method of encapsulating a heat storage material for heat storage or heat dissipation in a container, the heat storage material is made of an inorganic salt hydrate, and hydrated water contained in the inorganic salt hydrate is used. The inorganic salt hydrate is produced by hydrating the desorbed anhydride and the added water in the container, and the mixture is sealed in the container.
(2) In the method for encapsulating a heat storage material in a container according to (1), the amount of water required to form a hydrate with respect to the anhydrate after filling the anhydrate in the container. The container is filled with the same amount of water or an amount exceeding the amount of water added.
(3) In the method for encapsulating the heat storage material in a container according to (1), the anhydride is in the form of a powder, which is necessary for producing the anhydride and a hydrate with respect to the anhydride. To prepare a slurry-like mixture containing at least the same amount of water or an amount exceeding the amount of water added in a slurry state, and after preparing the slurry-like mixture, put the slurry-like mixture in the container. A method of encapsulating a heat storage material in a container, which comprises filling the inside.
(4) In the method for encapsulating a heat storage material in a container according to any one of (1) to (3), the container is formed in a flexible bag shape. After filling the anhydrous product with the water to close the container, or filling the slurry-like mixture to close the container, the opening of the container is closed while sucking the inside of the container. It is characterized by that.
(5) In the method for encapsulating a heat storage material in a container according to any one of (1) to (3), the inorganic salt hydrate is produced in the first container as the container, and the first. Apart from the first container, a second container larger than the first container and formed in a flexible bag shape is used, and the first container containing the produced inorganic salt hydrate is used. Covered by the second container, in a single-layered state with a single second container, or in a multi-layered state with multiple layers, like a nest, with a plurality of the second containers. Rarely, it is characterized in that it is sealed in the second container by sealing the second container.
(6) In the method for filling a heat storage material in a container according to (5), the first container is filled with the anhydrous product and the water to close the first container, or the first container is described. After filling the slurry-like mixture to close the first container, the first container is housed in the second container in this state, and at least the outermost second container is sucked while sucking. It is characterized in that the opening of the second container on the outside is sealed.
(7) In the method for encapsulating the heat storage material in a container according to any one of (2) to (6), a water-soluble additive for adjusting the physical properties of the heat storage material is blended, and the additive is the above-mentioned. A melting point adjuster that adjusts the melting point of the heat storage material to a set temperature as necessary, a thickener that increases the viscosity of the melt of the heat storage material in a liquid phase state, or a supercooling phenomenon of the heat storage material is prevented. However, it is characterized in that it is at least one of the supercooling inhibitor that promotes the induction of crystallization of the heat storage material in the melted state.
(8) In the method for filling a heat storage material in a container according to (7), after preparing an aqueous additive solution in which the additive is dissolved in water, the aqueous additive solution is placed in the container instead of the water. It is characterized by being filled or mixed with the anhydride to produce the slurry mixture.
(9) In the method for sealing a heat storage material in a container according to (7) or (8), the melting point adjusting agent to be blended as the additive is anhydrous sodium sulfate (Na ₂ SO ₄ ). To do.
(10) In the method for encapsulating the heat storage material in a container according to (9), in the heat storage material composition in which the additive is mixed with the heat storage material, the anhydrous sodium sulfate (Na) accounts for the total weight of the heat storage material composition. ₂ SO ₄ ) is characterized in that the blending ratio is within the range of 10 wt% or less.
(11) In the method for encapsulating a heat storage material in a container according to any one of (7) to (10), the thickener to be blended as the additive is a substance belonging to a sugar alcohol. And.
(12) In the method for encapsulating the heat storage material in a container according to (11), the thickener is mannitol (C ₆ H ₁₄ O ₆ ).
(13) In the method for encapsulating the heat storage material in a container according to (11) or (12), in the heat storage material composition in which the additive is blended with the heat storage material, the increase in the total weight of the heat storage material composition. The blending ratio of the thickener is within the range of 20 wt% or less.
(14) In the method for encapsulating a heat storage material in a container according to any one of (1) to (13), the inorganic salt hydrate is alum hydrate.
(15) In the vessel enclosing a method of the heat storage material as described in (14), the alum hydrate, ammonium alum dodecahydrate _{(AlNH 4 (SO 4) 2} · 12H 2 O), or potassium alum 12 it hydrates _{(AlK (SO 4) 2 ·} 12H 2 O), and wherein.

The operation and effect of the method for encapsulating the heat storage material of the present invention having the above structure in a container will be described.
(1) Encapsulating a heat storage material that stores or dissipates heat in a container In a method of encapsulating a heat storage material in a container, the heat storage material is composed of an inorganic salt hydrate and desorbs hydrated water contained in the inorganic salt hydrate. It is characterized in that an inorganic salt hydrate is produced by hydrating the anhydrate and the added water in a container and sealed in the container. Due to this feature, the gap between adjacent powders before filling the container of anhydrous is filled with water added to the container during the hydration reaction, so the volume occupied by the heat storage material with respect to the internal volume of the container. The filling rate is significantly improved as compared with the method of filling the heat storage material in the container according to the conventional embodiment in which the powdered inorganic salt hydrate is directly filled in the container. Further, since the generation of gaps is suppressed, the time required for heat conduction between the heat storage material and the heat medium in the heat storage tank is shortened as compared with the conventional case, so that such heat transfer performance is improved. Further, in order to generate a heat storage material or a heat storage material composition containing an additive, no heating equipment is required, and such a heat storage material composition or the like can be easily generated in a container at room temperature. can do. Moreover, even if the heat storage material composition has a relatively high melting point of, for example, about 90 ° C., the heat storage material composition in a liquid phase state is not directly handled, and the filling / encapsulation work of the heat storage material composition or the like can be performed. , It is safer than the method of enclosing the heat storage material in the container according to the conventional embodiment.

Therefore, according to the method for encapsulating the heat storage material in the container according to the present invention, the heat storage material or the like is used to enclose the heat storage material or the heat storage material composition in which the additive is mixed with the heat storage material in the container. In addition to efficiently performing the process of encapsulating the heat in the container, heat conduction between the heat medium in the tank and the heat storage material can be efficiently performed in the heat storage tank using the heat storage material or the like. Has an effect.

In the method for encapsulating a heat storage material in a container according to (2), the amount of water added to the anhydrate is the same as or the amount of water required to form a hydrate for the anhydrate after the anhydrate is filled in the container. It is characterized in that the container is filled with an amount of water exceeding the above amount. Further, in the method for encapsulating the heat storage material in the container described in (3), the anhydride is in the form of powder, which is the same as the amount of water required to form the hydrate with respect to the anhydride. It is characterized in that a slurry-like mixture containing at least an amount or an amount of water exceeding the amount of hydration is mixed in a slurry state, and after the preparation of the slurry-like mixture, the slurry-like mixture is filled in a container. To do.

Based on the characteristics of (2) and (3), for example, a heat storage material enclosure in which an additive-added heat storage material composition is generated in a container and filled is produced, and this heat storage material is prepared. In a heat storage material encapsulation pack or the like in which the encapsulation is housed in another container, the size of the gap in the heat storage material encapsulation pack is reduced by at least 30% or more as compared with the method of encapsulating the heat storage material in the container according to the conventional embodiment. can do.

In the method for filling a heat storage material in a container according to (4), the container is formed in a flexible bag shape, and the container is filled with an anhydride and water to close the container. Alternatively, the container is filled with a slurry-like mixture to close the container, and then the opening of the container is sealed while sucking the inside of the container. When the container is closed by filling with unhydrated water and water, or when the container is closed by filling with a slurry mixture, the gap between the powders is filled with water and a solid with no internal voids. A form of inorganic salt hydrate can be produced in the container, but air enters from the outside when the container is closed. Therefore, a void is inevitably generated between the heat storage material or the like which is an inorganic salt hydrate and the container. However, due to the above-mentioned characteristics, by sealing the opening of the container while sucking the inside of the container, the air that has entered the container is excluded, and the heat storage material or the heat storage material composition generated in the container is transferred to the container. It can be sealed in a container in close contact with. Therefore, the adverse effect on heat conduction caused by the gap between the heat storage material or the like and the container can be more reliably suppressed.

In the method for encapsulating the heat storage material in a container according to (5), the inorganic salt hydrate is produced in the first container as a container, and is larger and more flexible than the first container separately from the first container. The first container containing the produced inorganic salt hydrate is a single-layered state of a single second container, or a plurality of second containers. It is covered by the second container in a multi-layered state like a nest by the second container, and is sealed in the second container by sealing the second container. It is characterized by. Due to this feature, when encapsulating the anhydride and water or the slurry-like mixture in the second container, the first container prevents leakage and scattering of the anhydride and water or the slurry-like mixture, for example. It is possible to prevent foreign matter due to the anhydride, the slurry-like mixture, or the like from adhering to the opening portion that seals the second container by fusion or the like. As a result, the second container can be tightly sealed without being hindered by such foreign matter, and the heat storage material composition produced in the first container leaks to the outside of the second container. It can be more reliably contained in the second container.

In the method for filling a heat storage material in a container according to (6), the first container is filled with an anhydride and water to close the first container, or the first container is filled with a slurry-like mixture. After closing the container 1, the first container is housed in the second container in this state, and the opening of the outer second container is sealed while sucking at least the outermost second container. It is characterized by doing. When the first container is closed by filling with unhydrated water and water, or when the first container is closed by filling with a slurry mixture, the gap between the powders is filled with water and the inside is filled. A solid inorganic salt hydrate having no voids can be produced in the container, but air enters from the outside when the first container is closed. Therefore, a gap is inevitably generated between the heat storage material or the like which is an inorganic salt hydrate and the first container. However, due to the above-mentioned characteristics, the air that has entered the first container is excluded by sealing the opening of the second container while sucking at least the outermost second container, and the first container is used. The heat storage material or the heat storage material composition generated in the container can be sealed in the first container and the second container in a state of being in close contact with the second container via the first container. Therefore, the adverse effect on heat conduction caused by the gap between the heat storage material or the like and the first container can be more reliably suppressed. When the first container containing the produced inorganic salt hydrate is covered with a plurality of second containers in a multi-layered state, the inside of the container is sucked into each of the second containers. By sealing the opening of the container, the adverse effect on heat conduction caused by the gap can be suppressed more effectively.

In the method for encapsulating the heat storage material in the container described in (7), a water-soluble additive for adjusting the physical properties of the heat storage material is blended, and the additive adjusts the melting point of the heat storage material to a set temperature as necessary. Melting point adjuster, thickener that increases the viscosity of the melt of the heat storage material in the liquid phase state, or promotes the induction of crystallization of the heat storage material in the melt state to prevent the supercooling phenomenon of the heat storage material. It is characterized by being at least one of the anticooling agents. Further, in the method for encapsulating the heat storage material in a container according to (9), the melting point adjusting agent to be blended as an additive is anhydrous sodium sulfate (Na ₂ SO ₄ ). Due to this feature, anhydrous sodium sulfate has a melting point of 884 ° C. and is a solid substance at room temperature, but is a heat storage material, ammonium myoban, at a blending ratio of, for example, 5 wt% with respect to the total weight of the heat storage material composition. When added to (melting point 93.5 ° C.) or the like, it is possible to produce a heat storage material composition having a desired melting point adjusted to a desired temperature, such as a heat storage material composition having a desired melting point of about 90 ° C.

In the method for filling a heat storage material in a container according to (8), after preparing an aqueous additive solution in which an additive is dissolved in water, the aqueous additive solution is filled in the container instead of water, or a slurry. It is characterized in that it is mixed with an anhydride to produce a state mixture. Due to this feature, for example, when the heat storage material is a latent heat storage material made of ammonium myoban dodecahydrate, the heat storage material inclusion material in which the slurry-like mixture is filled in a container has a powdery ammonium myoban dodecahydrate. Compared to the case where a container is filled with a powdery mixture (heat storage material composition after formation) mixed with powdery additives, the heat storage material composition produced in the heat storage material enclosure is a component of the heat storage material composition. It can be prepared with a uniform concentration and distribution. In particular, when the generated heat storage material composition is subdivided into a plurality of containers, the composition of the heat storage material composition filled in the containers is kept uniform in all the containers, so that the heat storage material composition is filled in the containers. When a plurality of material-encapsulated packs are produced, a high-quality heat storage material-encapsulated pack can be provided.

In the method for encapsulating the heat storage material in a container according to (10), in the heat storage material composition in which an additive is added to the heat storage material, the mixing ratio of anhydrous sodium sulfate (Na ₂ SO ₄ ) to the total weight of the heat storage material composition. Is within the range of 10 wt% or less. Due to this feature, when the heat storage material is the exemplified ammonium alum, for example, a heat storage material composition adjusted so that the melting point is in the temperature range of 80 to 90 ° C. can be produced, and the heat storage material composition can produce 80 to 80 to 90 ° C. It is possible to store heat and dissipate it in a temperature range such as 90 ° C. Therefore, when the heat radiation of the heat storage material composition is used as the heat source (energy source) of the hot water supply equipment or the air conditioning equipment for heating and cooling, the heat source of about 90 ° C. is convenient for such the hot water supply equipment. , Can be used in a wide variety of fields in the industrial world.

In the method for encapsulating a heat storage material in a container according to (11), the thickener to be blended as an additive is a substance belonging to sugar alcohol. Due to this feature, when the inorganic salt hydrate is, for example, alum hydrate such as ammonium alum dodecahydrate, the thickener is easily dissolved in water, which is a component of the inorganic salt hydrate, and has a composition. The heat storage material composition is chemically stable.

In the method for encapsulating the heat storage material in a container according to (12), the thickener is mannitol (C ₆ H ₁₄ O ₆ ). Due to this feature, mannitol increases the viscosity of the melt of the heat storage material in the liquid phase state, the phase separation phenomenon between the components constituting the heat storage material composition, and the density of the components constituting the heat storage material composition. It is possible to prevent non-uniformity of the components due to the difference in density with respect to the components different from each other. In addition, mannitol is non-toxic and non-dangerous, so it is easy to handle and inexpensive.

In the method for encapsulating the heat storage material in the container according to (13), in the heat storage material composition in which the additive is mixed with the heat storage material, the mixing ratio of the thickener to the total weight of the heat storage material composition is 20 wt% or less. It is characterized by being within the range. Due to this feature, when an additive such as a melting point adjusting agent or a supercooling inhibitor is blended in the heat storage material composition, the component of the heat storage material and the component of the melting point adjusting agent are made non-uniform. A well-balanced diffused state can be stably maintained by the thickener.

In the method for encapsulating the heat storage material in a container according to (14), the inorganic salt hydrate is alum hydrate. Due to this feature, among various types of inorganic salt hydrates, latent heat storage materials using alum hydrate such as ammonium alum dodecahydrate have relatively large latent heat due to phase change. Have. Therefore, the latent heat storage material having such physical properties has a relatively large amount of heat storage that can be stored. Further, the heat storage material composition containing the latent heat storage material which is alum hydrate is excellent in that it can have a heat storage and heat dissipation performance of storing a large amount of heat and dissipating it.

In container enclosing method of the heat storage material described in (15), alum hydrate are ammonium alum dodecahydrate _{(AlNH 4 (SO 4) 2} · 12H 2 O), or potassium alum dodecahydrate ( _{AlK (SO 4) 2 · 12H} 2 O) and it is characterized by. Due to this feature, ammonium alum dodecahydrate and potassium alum dodecahydrate are widely distributed in the market, easily available, and inexpensive.

It is a flow chart which shows the process of the method of filling the heat storage material in a container which concerns on Example 1 of Embodiment. It is a flow chart which shows the process of the method of sealing the heat storage material in a container which concerns on Example 2 of Embodiment 2. It is a flow chart which shows the process of sealing the heat storage material inclusion material produced by the method of sealing the heat storage material in a container which concerns on embodiment in a sealing bag. It is a schematic diagram which illustrated the heat storage tank which concerns on this embodiment. It is explanatory drawing which shows typically the heat storage material which concerns on this embodiment. It is a table which shows the result of the investigation experiment which confirmed the significance of the method of encapsulating the heat storage material in a container which concerns on this embodiment. It is a schematic diagram which shows the cross section of the heat storage material filling pack including the void part. It is a graph which shows the significance of mannitol contained in the heat storage material composition which concerns on this embodiment. It is a flow chart which shows the process of the method of sealing the heat storage material in a container which concerns on a conventional embodiment.

(Embodiment)
Hereinafter, the method for encapsulating the heat storage material in the container according to the present invention will be described in detail with reference to the drawings. The heat storage material according to the present invention is made of an inorganic salt hydrate, and in the present embodiment, a case where the heat storage material is a latent heat storage material that stores heat or dissipates heat by moving latent heat due to a phase change will be described. Further, the latent heat storage material is filled in a container (first container) in the form of a heat storage material composition mixed with an additive, and the first container is further enclosed in a double second container (container). It is housed in the heat storage tank in the stored state.

First, the heat storage tank will be briefly described with reference to FIG. FIG. 4 is a schematic view illustrating the heat storage tank according to the present embodiment. In the heat storage tank 60, for example, the exhaust heat of a cogeneration or combined heat and power gas engine system installed in an emergency power source of a hospital, a building, or the like, or the exhaust heat generated from a factory, business establishment, home, or the like. The heat medium 61 such as water stored in the tank is heated to about 90 ° C., and the latent heat storage material 10 stores heat in the temperature range of 80 to 90 ° C. via the heat medium 61. The heat stored in the latent heat storage material 10 is dissipated in this temperature range and is utilized as a heat source (energy source) for hot water supply equipment (not shown), air conditioning equipment for heating and cooling, and the like. The latent heat storage material 10 is housed in the heat storage material encapsulation pack 1 described later, and as shown in FIG. 4, a plurality of heat storage material encapsulation packs 1 are housed in the heat storage tank 60.

Next, the latent heat storage material 10 will be described with reference to FIG. FIG. 5 is a schematic view showing a heat storage material according to the present embodiment. The latent heat storage material 10 is alum hydrate, and in this embodiment, it is ammonium alum dodecahydrate (ammonium aluminum sulfate, 12 water: AlNH ₄ (SO ₄ ) ₂・ 12H ₂ O). As shown in FIG. 1, the latent heat storage material 10 as the main component forms the heat storage material composition 3 together with the two kinds of additives 20 blended. Ammonium alum dodecahydrate has physical properties of a melting point of 93.5 ° C. and is a solid substance at room temperature. Therefore, even if ammonium alum dodecahydrate is heated to about 90 ° C., which is lower than the melting point by itself, ammonium alum dodecahydrate hardly melts and cannot store latent heat.

Both of the additives 20 are water-soluble additives that play a role in adjusting the physical properties of the latent heat storage material 10. The first additive 20 is a melting point adjusting agent 21 that adjusts the melting point of the latent heat storage material 10 to an arbitrary temperature as needed. In the present embodiment, the melting point adjusting agent 21 is anhydrous sodium sulfate (Na ₂ SO ₄ ), and anhydrous sodium sulfate has physical properties of a melting point of 884 ° C. and is a solid substance at room temperature. The blending ratio of anhydrous sodium sulfate to the total weight of the heat storage material composition 3 is within the range of 10 wt% or less, and the melting point adjusting agent 21 has a blending ratio of, for example, 2 to 5 wt%, and the latent heat storage material 10 (ammonium). When added to myoban), the melting point of the heat storage material composition 3 becomes about 90 ° C.

The second additive 20 is a thickener 22 that increases the viscosity of the melt of the latent heat storage material 10 in the liquid phase state. The thickener 22 is a substance belonging to a sugar alcohol, and in the present embodiment, the thickener 22 is mannitol (C ₆ H ₁₄ O ₆ ). The blending ratio of mannitol in the total weight of the heat storage material composition 3 is within the range of 20 wt% or less.

In the present embodiment, the latent heat storage material 10 as the main component is ammonium alum dodecahydrate (ammonium aluminum sulfate, 12 water: AlNH ₄ (SO ₄ ) ₂・ 12H ₂ O). However, the metal ion contained in ammonium myoban dodecahydrate, which is the main component of the latent heat storage material, is not only aluminum ion but also trivalent metal ion such as chromium ion, iron ion, cobalt ion and manganese ion. It may be present, and the ammonium myoban dodecahydrate may be a double sulfate containing such a trivalent metal ion. Moreover, the latent heat storage material 10 is not limited to ammonium alum dodecahydrate, potassium alum dodecahydrate _{(AlK (SO 4) 2 ·} 12H 2 O) In addition to such, if alum hydrate, particularly limited It is not something that is done.

Further, in the present embodiment, mannitol was used as the thickener 22, but the thickener is not only mannitol, but also erythritol, for example, which does not cause browning or caramelization even when heated, and has physical properties resistant to acid. The substance is not particularly limited as long as it belongs to the sugar alcohol having. In addition to substances belonging to sugar alcohols, thickeners have repeating units such as gellan gum (also known as gellan, polysaccharide S-60 [abbreviation: PS-60], etc.). It may be a kind of polymer and may be a substance belonging to a polysaccharide (polysaccharide) classified as a complex polysaccharide (heteropolysaccharide). The reason is that, for example, when gellan gum is used as a thickener, gellan gum itself does not have a heat storage property, but gelation of gellan gum is promoted only by adding a small amount of gellan gum to ammonium alum dodecahydrate. This is because the separation of the constituent components in the heat storage material composition can be suppressed more effectively.

Further, in the present embodiment, the heat storage material composition 3 in which the melting point adjusting agent 21 and the thickener 22 are mixed as the additive is mentioned, but the thickener to be mixed in the heat storage material composition is a melting point adjusting agent or a thickener. Not limited to the thickener, the thickener to be blended in the heat storage material composition is at least among the melting point adjusting agent, the thickener, and the supercooling inhibitor that promotes the induction of crystallization of the heat storage material in the melted state. Any one may be used.

Next, Examples 1 and 2 are given with respect to the process of filling the heat storage material composition 3 into the leakage prevention inner bag 40 (corresponding to the first container of the present invention) to form the heat storage material enclosure 2. I will explain. FIG. 1 is a flow chart illustrating a process of a method of encapsulating a heat storage material in a container according to the first embodiment of the embodiment. FIG. 2 is a flow chart illustrating the process of the method of encapsulating the heat storage material in the container according to the second embodiment.

As described above, the heat storage material encapsulation pack 1 is housed in the heat storage tank 60. As shown in FIGS. 1 and 2, the heat storage material composition 3 is filled in the leakage prevention inner bag 40 as the heat storage material enclosure 2. The heat storage material enclosure 2 is inside the inner first enclosure 50A of the two overlapping enclosure bags 50 (first enclosure 50A, second enclosure 50B) (corresponding to the second container of the present invention). It is housed as a prepack 1A filled with a heat storage material. Further, the heat storage material-filled prepack 1A is housed in the outer first sealing bag 50B as a mode in which the heat storage material-filled pack 1 is housed in the heat storage tank 60. In the present embodiment, the leakage prevention inner bag 40 is, for example, a packaging bag made of thin polyethylene (PE: polyethylene) having a length of 23 cm and a width of 12 cm and a thickness of about 0.02 mm.

The heat storage material enclosure 2 is configured by the method for enclosing the heat storage material in a container according to the present invention. In the method for encapsulating the heat storage material in a container according to the present invention, the anhydrous product obtained by removing the hydrated water contained in the inorganic salt hydrate and the added water are placed in the first container (leakage prevention inner bag 40). This is a method of producing an inorganic salt hydrate by hydrating with water and enclosing a container.

Inorganic salt hydrates, in the present embodiment, ammonium alum _{dodecahydrate:} a (ammonium aluminum sulfate, 12 water _{AlNH 4 (SO 4) 2 ·} 12H 2 O), the anhydrate, ammonium alum 12 hydrated It is a burned ammonium alum (AlNH ₄ (SO ₄ ) ₂ ) from which the hydrated water (12H ₂ O) contained in the substance has been desorbed. The water is, for example, pure water, ion-exchanged water, tap water, or the like.

(Example 1)
In the method of encapsulating the heat storage material in the container according to the first embodiment of the present embodiment, the amount of the baked ammonium alum 11 having a blending ratio of 90 wt% with respect to the heat storage material composition 3 to be produced is about 1 mm on average. After the particles are crushed into a powder state ((a) in FIG. 1), the particles are filled into the leakage prevention inner bag 40 through the opening 41 ((b) in FIG. 1). It is preferable that the size of the particles of the baked ammonium alum 11 is smaller than about 1 mm on average because the gaps between the particles are smaller.

On the other hand, the melting point adjusting agent 21 and the thickener 22 are put into the first bottle 71 made of polypropylene (PP) together with water 12 at room temperature, and stirred at room temperature to obtain the melting point adjusting agent 21. An aqueous additive solution 30 in which the thickener 22 and the thickener 22 are dissolved in water 12 is prepared ((c) in FIG. 1). At this time, the amount of the melting point adjusting agent 21 added is 2 wt% with respect to the heat storage material composition 3 to be produced, and the amount of the thickener 22 added is also 8 wt%. Both the melting point adjusting agent 21 and the thickener 22 are in the form of powder obtained by crushing particles to an average size of about several hundred μm. The amount of water 12 added is the same as the amount of water required to produce ammonium myoban hydrate 10 (latent heat storage material 10), which is the hydrate of the anhydrous ammonium myoban 11. Or the amount of water that exceeds the amount of water added. This amount of water is the amount corresponding to the hydrated water (12H ₂ O) contained in the ammonium alum hydrate 10.

Next, after filling the baked ammonium alum 11 into the leakage prevention inner bag 40, the additive aqueous solution 30 is poured into the leakage prevention inner bag 40 through the opening 41 (in FIG. 1, (d)) to prevent leakage. The leak-preventing inner bag 40 is allowed to stand horizontally until the hydration reaction between the baked ammonium alum 11 and the water 12 is completed in the bag 40. As a result, the leak-preventing inner bag 40 contains the baked ammonium alum 11 having a blending ratio of 90 wt%, the water 12 having a water content corresponding to the hydrated water (12H ₂ O), and the melting point adjusting agent 21 having a blending ratio of 2 wt%. And the thickener 22 having a blending ratio of 8 wt% are mixed with each other. As shown in FIG. 1 (e), the mixture of the baked ammonium alum 11 and the additive aqueous solution 30 at room temperature gradually solidifies through the slurry-like mixture 15. As a result, the heat storage material composition 3 in which the melting point adjusting agent 21 and the thickener 22 are mixed with the ammonium alum hydrate 10 produced by the baked ammonium alum 11 and the water 12 is contained in the leakage prevention inner bag 40. Will be generated.

Next, the folded-back portion 42 on the opening 41 side of the leak-preventing inner bag 40 is folded back to close the leak-preventing inner bag 40. In the present embodiment, the leakage prevention inner bag 40 folded back at the folded-back portion 42 is, for example, a rectangle having a length of 18 cm and a width of 12 cm. In this way, the heat storage material enclosure 2 in which the heat storage material composition 3 is housed in the leakage prevention inner bag 40 is produced ((f) in FIG. 1).

(Example 2)
In the method of encapsulating the heat storage material in the container according to the second embodiment of the present embodiment, the amount of the baked ammonium alum 11 having a blending ratio of 90 wt% with respect to the heat storage material composition 3 to be produced is about 1 mm on average. The particles are made into a crushed powder ((a) in FIG. 2). On the other hand, in each case, the powdery melting point adjusting agent 21 and the thickener 22 in which the particles are crushed to an average size of about several hundred μm are put into the first polypropylene bottle 71 together with water 12 at room temperature. Then, by stirring at room temperature, the additive aqueous solution 30 in which the melting point adjusting agent 21 and the thickener 22 are dissolved in water 12 is prepared ((b) in FIG. 2).

Next, the additive aqueous solution 30 is poured into the second bottle 72 containing the powdered baked ammonium alum 11, and the baked ammonium alum 11 and the additive aqueous solution 30 are mixed in the second bottle 72 and kept at room temperature. Stir ((c) in FIG. 2). As a result, a slurry-like mixture 15 in which the baked ammonium alum 11 and the additive aqueous solution 30 are mixed in a slurry form is produced ((d) in FIG. 2).

Next, the slurry-like mixture 15 is poured into the leak-preventing inner bag 40 through the opening 41 ((e) in FIG. 2), and the baked ammonium alum 11 and the water 12 are mixed in the leak-preventing inner bag 40. The leakage prevention inner bag 40 is allowed to stand horizontally until the hydration reaction is completed. The slurry-like mixture 15 in the leak-preventing inner bag 40 solidifies over time. As a result, the heat storage material composition 3 in which the melting point adjusting agent 21 and the thickener 22 are mixed with the ammonium alum hydrate 10 produced by the baked ammonium alum 11 and the water 12 is contained in the leakage prevention inner bag 40. Will be generated.

Then, as in the first embodiment, the folded-back portion 42 on the opening 41 side of the leak-preventing inner bag 40 is folded back to close the leak-preventing inner bag 40. In this way, the heat storage material enclosure 2 in which the heat storage material composition 3 is housed in the leakage prevention inner bag 40 is produced (in FIG. 2, (f)).

Next, among the methods for encapsulating the heat storage material in the container according to the present embodiment, a step of accommodating the heat storage material encapsulation 2 in the encapsulation bag 50 will be described with reference to FIG. FIG. 3 is a flow chart illustrating a step of enclosing the heat storage material enclosure formed by the method of encapsulating the heat storage material in the container according to the embodiment in the encapsulation bag.

The encapsulation bag 50 is a flexible bag formed in a size capable of accommodating the heat storage material encapsulation 2 from the opening 51. Specifically, in the present embodiment, the encapsulation bag 50 is formed on the outside of a film-like resin such as polyethylene (PE: polypropylene), polypropylene (PP: polypropylene), or polyethylene terephthalate (PET). It is a laminated bag having a structure of two or more layers in which aluminum foil is vapor-deposited, and is a packaging bag or the like formed in a rectangular shape with a thickness of about 0.05 to 0.15 mm. The sealed bag 50 is used in a double bag structure in which bags of different sizes are wrapped in a double bag (first sealed bag 50A, second sealed bag 50B) like a nest. The inner first encapsulation bag 50A is a rectangular bag with a length of 21.5 cm and a width of 14.8 cm, and the outer second encapsulation bag 50B is a rectangular bag with a length of 25.0 cm and a width of 17.3 cm. Is.

In FIG. 3, as shown in (a), the heat storage material enclosure 2 configured by the method for enclosing the heat storage material in the container according to Examples 1 and 2 has a first encapsulation bag 50A (encapsulation bag 50) through the opening 51. It is housed inside ((b) in FIG. 3). After that, as shown in (c) in FIG. 3, a well-known vacuum degassing sealer was used to degas while sucking the inside of the first encapsulation bag 50A, and at the same time, the opening 51 of the first encapsulation bag 50A was fused. The first sealing bag 50A is completely sealed by the stopper 52 ((d) in FIG. 3). At this time, suction is performed to seal the opening 51 of the first sealing bag 50A until the leakage prevention inner bag 40 of the heat storage material inclusion 2 comes into close contact with the contracted first sealing bag 50A. As a result, the heat storage material-encapsulated prepack 1A in which the heat storage material-encapsulated material 2 is contained in the first encapsulation bag 50A is produced.

Next, the produced heat storage material-encapsulated prepack 1A is housed in a second encapsulation bag 50B (encapsulation bag 50) different from the first encapsulation bag 50A through the opening 51. After that, as shown in (e) in FIG. 3, the inside of the second sealed bag 50B is sucked and degassed again by the vacuum degassing sealer, and at the same time, the opening 51 of the second sealed bag 50B (in FIG. 3). The second sealing bag 50B is completely sealed with the sealing portion 52 fused (see (b)) ((f) in FIG. 3). At this time, suction is performed to seal the opening 51 of the second sealed bag 50B until the heat storage material-filled prepack 1A is in close contact with the shrunk second sealed bag 50B. Thus, as a mode of accommodating in the heat storage tank 60, the leakage prevention inner bag 40 containing the heat storage material inclusion 2 is placed in the double bag structure encapsulation bag 50 (first encapsulation bag 50A, second encapsulation bag 50B). The covered heat storage material encapsulation pack 1 is produced.

In the embodiment, the leakage prevention inner bag 40 containing the heat storage material enclosure 2 is wrapped in the double bag structure sealing bag 50, but the sealing bag 50 wrapping the leakage prevention inner bag 40 is a double bag. In addition to the structure, a single bag structure consisting of only one sealed bag 50, a triple bag structure, or more, the sealed bags 50 may be stacked in multiple layers. That is, the second container that further encloses the first container containing the heat storage material or the heat storage material composition is in a single layer state by a single second container, or is nested by a plurality of second containers. As described above, it suffices to be in a state of multiple layers in which multiple layers are stacked.

Next, for the purpose of confirming the significance of the in-container encapsulation method according to the present embodiment, the in-container encapsulation method of the heat storage material according to the second embodiment of the present embodiment and the in-container of the heat storage material according to the conventional embodiment. A survey experiment was conducted in comparison with the encapsulation method. FIG. 9 is a flow chart illustrating the process of the method of encapsulating the heat storage material in the container according to the conventional embodiment.

First, the outline of the method of encapsulating the heat storage material in the container according to the conventional embodiment will be briefly described with reference to FIG. The description describes the case where the heat storage material composition having the same composition as that of the heat storage material composition 3 sealed by the method of sealing the heat storage material in the container according to the second embodiment is sealed by the method of sealing the heat storage material in the container according to the conventional embodiment. To do it. In the description, the part that overlaps with the content of the method for encapsulating the heat storage material in the container according to the second embodiment of the present embodiment will be omitted or simplified.

Ammonium alum hydrate 10 is in the form of a powder obtained by pulverizing particles to an average size of about 1 mm. Both the melting point adjusting agent 21 and the thickener 22 are in the form of powder in which particles are pulverized to an average size of about several hundred μm ((a) in FIG. 9). The blending ratio of the ammonium alum hydrate 10 is 90 wt%, the blending ratio of the melting point adjusting agent 21 is 2 wt%, and the blending ratio of the thickener 22 is 8 wt% with respect to the heat storage material composition 3 to be produced. In the method for encapsulating the heat storage material in a container according to the conventional embodiment, the ammonium alum hydrate 10, the melting point adjusting agent 21, and the thickener 22 are uniformly agitated, and a plurality of mixtures thereof are produced. Each of the leak-preventing inner bags 40 was put into the inner bag 40 through the opening 41 and subdivided (in FIG. 9, (b)). As a result, the heat storage material composition 3 was generated in each leakage prevention inner bag 40. Then, the opening 41 of the leakage prevention inner bag 40 is closed by folding the folded-back portion 42 on the opening 41 side, and the leakage prevention inner bag 40 in this state is housed in the sealing bag 50, and the sealing bag 50 The sealing bag 50 was sealed by fusing the openings.

Next, the survey experiment will be described.
<Experimental method>
-In the investigation experiment, in order to prepare the heat storage material enclosure 2 in which 100 g of the heat storage material composition 3 is sealed in the A5 size leakage prevention inner bag 40, the method of enclosing the heat storage material in the container according to the second embodiment. As a comparative example of the experiment 1 prepared in the above, the experiment 2 prepared by the method of encapsulating the heat storage material in the container according to the conventional embodiment was carried out.
-In both Experiments 1 and 2, as described above, the prepared heat storage material enclosure 2 was first housed in the first encapsulation bag 50A, and the openings were fused while sucking the inside of the first encapsulation bag 50A. Five heat storage material-encapsulated prepacks 1A (Experiment 1) (in Experiment 2, a heat storage material-encapsulated prepack corresponding to the heat storage material-encapsulated prepack 1A) were prepared by sealing the inside of the encapsulation bag 50A. Further, in Experiment 1, the heat storage material-encapsulated prepack 1A (in Experiment 2, the heat storage material-encapsulated prepack) was individually housed in the second encapsulation bag 50B, and the openings were fused while sucking the inside of the second encapsulation bag 50B. Five packs of heat storage material-encapsulated packs 1 (pre-packs filled with heat storage material) that sealed the inside of the second sealed bag 50B were produced.
・ In both Experiments 1 and 2, all 5 packs of heat storage material-filled pack 1 (heat storage material-filled pre-pack) were immersed in the water in the water tank, and the volume of water corresponding to the elevated water level was calculated, and then the heat storage per pack Measure the average volume of the material encapsulation pack 1 (heat storage material encapsulation prepack).

<Common conditions between Experiment 1 and Experiment 2>
-Amount of heat storage material composition 3 to be produced: 100 g
-Melting point of heat storage material composition 3: Approximately 90 ° C
Melting point adjuster 21: 2 g of powdered anhydrous sodium sulfate (Na ₂ SO ₄ )
Thickener 22: 8 g of powdered mannitol (C ₆ H ₁₄ O ₆ )
-Tare of the heat storage material enclosure 2: Leakage prevention inner bag 40
・ Sealing of heat storage material encapsulation 2: Folded back at the folded part 42 of the inner bag 40 for leakage prevention ・ Tare of heat storage material encapsulation pack 1 (heat storage material encapsulation prepack): Duplicated encapsulation bag 50
-Encapsulation of heat storage material encapsulation pack 1 (heat storage material encapsulation prepack): fusion by vacuum degassing sealer (sealing portion 52)

<Conditions for Experiment 1>
Anhydrous product 11: 47.12 g of powdered baked ammonium alum (AlNH ₄ (SO ₄ ) ₂ ) (equivalent to 0.198 mol of the molecular weight of 237.162).
-Water 12: 42.88 g of pure water (amount corresponding to hydrated water (12H ₂ O) of ammonium alum dodecahydrate 10)
-Mixing of melting point adjusting agent 21, thickener 22 and water 12: Stir at room temperature to prepare additive aqueous solution 30-Method of enclosing the heat storage material composition 3 in the leakage prevention inner bag 40: Examples described above. Method of enclosing the heat storage material in the container according to item 2

<Conditions for Experiment 2>
Inorganic salt hydrate 10: powdery ammonium alum dodecahydrate: to (ammonium aluminum sulfate, 12 water _{AlNH4 (SO 4) 2 · 12H} 2 O) and 90 g (molecular weight 453.354, equivalent thereof 0.198mol min )
-Mixing of the inorganic salt hydrate 10, the melting point adjusting agent 21 and the thickener 22: Stirring in a pot at room temperature and mixing-The method of enclosing the heat storage material composition 3 in the leakage prevention inner bag 40: described above. A method of encapsulating a heat storage material in a container according to the conventional embodiment. However, after the heat storage material composition 3 is generated in the leakage prevention inner bag 40, the leakage prevention inner bag 40 is folded back on the opening 41 side of the leakage prevention inner bag 40 as in the second embodiment. The bag 40 is closed, and the leakage prevention inner bag 40 is housed in the sealing bag 50. The sealing bag 50 has a double bag structure.

<Experimental results>
FIG. 6 is a table showing the results of a survey experiment confirming the significance of the method of encapsulating the heat storage material in the container according to the present embodiment. As shown in FIG. 6, regarding the average volume of the heat storage material-encapsulated pack 1 (heat storage material-encapsulated pre-pack), the volume was 132.0 cm ³ in Experiment 2, whereas the volume was 103.2 cm ^{3 in} Experiment 1. Met. The volume obtained in Experiment 1 is 21.8% smaller than the volume obtained in Experiment 2. Since the amount of the heat storage material composition 3 produced is 100 g, which is the same in Experiments 1 and 2, the volume is 61.2 cm ³ (calculated value), which is the same in Experiments 1 and 2.

Here, the volumes of the leakage prevention inner bag 40 and the sealing bag 50 are extremely small compared to the others, and in the heat storage material sealing pack 1 and the like, the leakage prevention inner bag 40 and the sealing bag 50 are in close contact with each other. The difference between the average volume of the heat storage material encapsulation pack 1 (heat storage material encapsulation prepack) and the volume of the heat storage material composition 3 can be approximated to the volume of the gap in the leakage prevention inner bag 40. Accordingly, the volume of the gap in the bag 40 for leakage prevention, in Experiment 2, while the volume is 70.8Cm ^3, in Experiment 1, the volume can be estimated to be 42.0Cm ³ ..

<Discussion>
The composition of the heat storage material composition 3 is substantially the same in Experiments 1 and 2. However, in the case of Experiment 2, 90 g of the inorganic salt hydrate 10 (powdered ammonium alum 12 hydrate 10) as the latent heat storage material 10 was used as it was, and the melting point adjusting agent 21 and the thickener 22 were left as they were. At the same time, it is mixed by stirring in a pot. Even if the powdered inorganic salt hydrate 10, the powdered melting point adjusting agent 21, and the powdered thickener 22 are evenly mixed in the pot, there is a gap between the adjacent powders. , A physical gap (gap) is inevitably generated.

In the case of Experiment 2, in the inorganic salt hydrate 10, the average volume of the heat storage material composition 3 produced by the heat storage material encapsulation pack was 132.0 cm ³ due to the existence of such a gap. It is thought that it also extends.

On the other hand, in the case of Experiment 1, powdered baked ammonium alum (AlNH ₄ (SO ₄ ) ₂ ) (anhydride 11), which is the main component of the latent heat storage material 10, a melting point adjusting agent 21, and a thickener The additive aqueous solution 30 in which 22 and 22 are dissolved in water 12 is mixed in advance in the polypropylene first bottle 71 to form a slurry-like mixture 15, and then poured into the leakage prevention inner bag 40. Therefore, the gap existing between the powders of the anhydrous sum 11 before being put into the leakage prevention inner bag 40 is filled with the additive aqueous solution 30, and the heat storage material composition 3 is used for leakage prevention. It is generated in the inner bag 40. The generated heat storage material composition 3 is formed of an integral structure having a high packing density. Therefore, in the case of Experiment 1, the average volume of the heat storage material composition 3 produced by the heat storage material encapsulation pack 1 is not affected by the gap existing between the powders of the anhydride 11 and is the experiment. than the volume 132.0Cm ³ in the case of 2, it is considered that fall 103.2Cm ³ which shrank 21.8 percent. That is, as compared with the case of Experiment 1, the volume filling rate of the heat storage material composition 3 is improved to 132.0 / 103.2 ≈1.3 (times) as compared with the case of Experiment 2.

Next, the influence of the gap included in the heat storage material encapsulation pack 1 will be considered from the viewpoint of heat conduction. FIG. 7 is a schematic view showing a cross section of the heat storage material encapsulation pack including the void portion. Here, the heat storage material encapsulation pack 1 originally contains the heat storage material enclosure 2 in which the heat storage material composition 3 is contained in the leakage prevention inner bag 40, and is enclosed in the encapsulation bag 50. 40 has a very thin thickness of about 0.02 mm. Further, since both of the duplicated sealed bags 50 are fused while being sucked, the influence caused by the gap between the first sealed bag 50A and the second sealed bag 50B is considerably small, and the inside for leakage prevention is provided. The influence of the bag 40 and the enclosed bag 50 can be ignored. Therefore, here, as shown in FIG. 7, a consideration is made from the viewpoint of heat conduction by using a model heat storage material encapsulation pack 1 in which the heat storage material composition 3 is directly enclosed in the encapsulation bag 50.

As shown in FIG. 7, when the heat storage material encapsulation pack 1 is horizontally arranged in the heat storage tank 60, the heat storage material composition 3 in the heat storage material encapsulation pack 1 is placed in the heat storage tank 60. When the heat storage medium 61 is heated by heat exceeding the melting point of 90 ° C., the heat storage material composition 3 is in a liquid phase state. At this time, it is assumed that the heat storage material composition 3 in the liquid phase state moves to the lower portion in the sealing bag 50 due to its own weight, and a gap portion 4 having a thickness d (0 ≦ d) is generated in the upper portion thereof.

When such a gap 4 is inside the heat storage material encapsulation pack 1, the lower surface of the heat storage material composition 3 in the encapsulation bag 50 and the heat medium 61 are used to store heat or dissipate heat when the heat storage material composition 3 stores heat or dissipates heat. It is considered that the heat conduction performed between the upper surface of the heat storage material composition 3 in the sealing bag 50 and the heat medium 61 is hindered by the void portion 4 as compared with the heat conduction performed between the two. Therefore, the adverse effect of the thermal resistance of the void portion 4 will be specifically examined.

The thermal resistance in the gap 4 can be calculated by the equation (1).
R = d / λA ... Equation (1)
R: Thermal resistance [K / W], d: Thickness of the gap [m], λ: Thermal conductivity of the gap [W / m · K], A: Surface area of the gap (for gap 4 and leakage prevention) Contact area of inner bag 40) [m ² ]
However, it is assumed that the effect on heat conduction can be almost ignored for the thickness of the duplicated encapsulation bag 50.

Of the double-bag-structured encapsulation bag 50 used in the present embodiment, the inner first encapsulation bag 50A is a rectangle having a length of 21.5 cm and a width of 14.8 cm, and includes a seal portion of 1 cm on all four sides thereof. Therefore, the contact area A between the first encapsulation bag 50A (encapsulation bag 50) and the gap 4 is
(0.215-0.02) × (0.148-0.02) ≈ 0.025 (m ² )… Solution (2)

As shown in FIG. 6, the volume of the gap 4 in the encapsulation bag 50 can be approximated to 42.0 cm ³ in the case of Experiment 1 and 70.8 cm ^{3 in} the case of Experiment 2, and the contact area A is the solution (2). Therefore, the thickness d of the gap portion 4 is
In the case of Experiment 1,
42.0 × 10 ^{3 /} 0.025 × 10 ⁶ = 1.68 ∴d ≒ 1.7 (mm)… Solution (3)
In the case of Experiment 2,
70.8 × 10 ^{3 /} 0.025 × 10 ⁶ = 2.83 ∴d ≒ 2.8 (mm)… Solution (4)

According to the solutions (3) and (4), 1.7 / 2.8 ≈ 0.61 ... Solution (5)
That is, the thickness d of the gap 4 of the heat storage material encapsulation pack 1 produced by the heat storage material encapsulation method (experiment 1) according to the second embodiment is the heat storage material encapsulation method (experiment 1) according to the conventional embodiment. Compared with 2), it is suppressed to about 61%. Therefore, the upper surface of the heat storage material composition 3 (upper surface in FIG. 7) and the inner surface of the leakage prevention inner bag 40 (in FIG. 7, the heat storage material encapsulation pack 1) which is in close contact with the encapsulation bag 50 are sandwiched between the gaps 4. The heat transfer rate v between (the inner surface of the upper side) is 1 / 0.61 = 1.64 ∴v ≒ 1.6 ... Solution (6) in comparison with Experiment 1 and Experiment 2.
From solution (6), it is estimated that the case of Experiment 1 is about 1.6 times that of Experiment 2.

By the way, as described above, in the present embodiment, mannitol (C ₆ H ₁₄ O ₆ ) is blended in the heat storage material composition 3 in the thickener 22. Mannitol acts as a binder between the component of baked ammonium alum that forms the latent heat storage material 10 and the component of anhydrous sodium sulfate compounded as the melting point adjuster 21, and also heat storage that enables heat storage or heat dissipation in the mannitol itself. It has characteristics. FIG. 8 is a graph showing the significance of mannitol contained in the heat storage material composition according to the present embodiment.

As shown in FIG. 8, in the case of a PCM alone containing no additives other than the latent heat storage material (indicated as “PCM” in FIG. 8), the amount of heat storage that can be stored per unit volume is P. In a heat storage material composition in which an additive (for example, a melting point adjuster such as anhydrous sodium sulfate) is added to PCM alone, the amount of heat storage that can be stored per unit volume is P1 rather than P by blending an additive that does not have heat storage characteristics. It becomes P0 (P1 <P0 <P) reduced by (P1 <P). This heat storage amount P0 is the amount of heat corresponding to the PCM alone contained in the heat storage material composition.

However, like the latent heat storage material contained in the heat storage material composition, mannitol used as a thickener also has a heat storage amount P2 (P2 <P) that can store heat, so that it can be used as a latent heat storage material as a PCM heat storage component. The sum of the corresponding heat storage amount P0 and the heat storage amount P2 as the mannitol heat storage component is the heat storage amount that can be stored per unit volume in the heat storage material composition. Therefore, it is considered that the heat storage material composition 3 can obtain a very large amount of heat storage, for example, 300 to 400 kJ / L, due to the heat storage characteristics of mannitol.

Next, the action / effect of the method of encapsulating the heat storage material in the container according to the present embodiment will be described. In the method of encapsulating the heat storage material in the container of the present embodiment, in the method of enclosing the latent heat storage material 10 that stores heat or dissipates heat in the inner bag 40 for preventing leakage, the latent heat storage material 10 is an inorganic salt water. Inorganic salt hydration by hydrating the anhydrous sumata 11 from which the hydrated water contained in the inorganic salt hydrate has been removed and the added water 12 in the inner bag 40 for preventing leakage. It is characterized in that an object 10 (latent heat storage material 10) is generated and sealed in an inner bag 40 for preventing leakage. Due to this feature, the gap between adjacent powders before being filled in the leakage prevention inner bag 40 of the anhydride 11 is filled with the water 12 added to the leakage prevention inner bag 40 during the hydration reaction. The volume filling ratio that the latent heat storage material 10 substantially occupies with respect to the internal volume of the leakage prevention inner bag 40 is such that the powdered inorganic salt hydrate 10 (ammonium myoban dodecahydrate) is contained in the leakage prevention inner bag 40. This is significantly improved as compared with the method of filling the heat storage material in the container according to the conventional embodiment in which the bag is directly filled. Further, since the generation of gaps is suppressed, the time required for heat conduction between the latent heat storage material 10 and the heat medium 61 in the heat storage tank 60 is shorter than in the conventional case, so that such heat transfer performance is high. Become. Further, in order to produce the heat storage material composition 3 which is a mixture of ammonium alum dodecahydrate 10 and the melting point adjusting agent 21 and the thickener 22, no heating equipment is required, and the heat storage material composition 3 is used. , It can be easily produced in the inner bag 40 for preventing leakage at room temperature. Therefore, the work of producing the heat storage material composition 3 and producing the heat storage material enclosure 2 can be efficiently performed. Further, unlike the heat storage material composition 3, even if the melting point (melting point is about 90 ° C.) is relatively high, the heat storage material composition 3 in the liquid phase state is not directly handled, and the work of producing the heat storage material enclosure 2 can be performed. , It is safer than the method of enclosing the heat storage material in the container according to the conventional embodiment.

That is, conventionally, in order to produce the heat storage material composition 3 in a completely liquid phase state, a powdered ammonium myoban dodecahydrate 10, a powdered melting point adjusting agent 21, and a powdered thickener 22 are used. The powdery mixture in which the above was mixed had to be heated to a temperature (for example, about 100 ° C.) exceeding the melting point of about 90 ° C. of the heat storage material composition 3 to be melted. A heating facility for heating the heat storage material composition 3 was required only for filling the inner bag 40 for preventing leakage. In addition, when the powdery mixture is heated to about 100 ° C. and melted, a large amount of heat energy is required at the time of heating, safety measures for the operator are also required, and the working time associated with the heating is extra. The heat storage material composition 3 could not be efficiently sealed in the leakage prevention inner bag 40 because it was hung. On the other hand, in the method of encapsulating the heat storage material in the container according to the present embodiment, this heating facility is unnecessary, and the reaction necessary for producing the heat storage material composition 3 occurs in the inner bag 40 for preventing leakage. The work that occurs spontaneously and involves the production of the heat storage material composition 3 can be performed efficiently and safely.

Therefore, according to the method for sealing the heat storage material in the container according to the present embodiment, the heat storage material composition 3 in which the latent heat storage material 10 is mixed with the additive 20 is sealed in the leakage prevention inner bag 40. In this case, the process of efficiently enclosing the heat storage material composition 3 in the leakage prevention inner bag 40 is efficiently performed, and in the heat storage tank 60 using the heat storage material composition 3, the heat medium 61 and the heat storage material composition in the tank are used. It has an excellent effect that heat conduction with the object 3 can be efficiently performed.

Further, in the method of encapsulating the heat storage material in the container according to the first embodiment of the present embodiment, the anhydride 11 (baked ammonium alum 11) is filled in the leakage prevention inner bag 40, and then water is added to the anhydride 11. The inner bag 40 for preventing leakage is filled with water 12 in an amount equal to or exceeding the amount of water required to produce a Japanese product. Further, in the method of encapsulating the heat storage material in the container according to the second embodiment of the present embodiment, the anhydrous mixture 11 is in the form of a powder, and the anhydrous mixture 11 and the hydrate are produced with respect to the anhydrous mixture 11. To prepare a slurry-like mixture 15 containing water 12, a melting point adjusting agent 21, and a thickener 22 in an amount equal to or exceeding the required amount of water added, and mixing them in a slurry state. After the preparation of 15, the slurry-like mixture 15 is filled in the leakage prevention inner bag 40.

Due to these characteristics, the heat storage material enclosure 2 in a state in which the heat storage material composition 3 in which the melting point adjusting agent 21 and the thickener 22 are added to the latent heat storage material 10 is generated and filled in the leakage prevention inner bag 40. In the heat storage material encapsulation pack 1 in which the heat storage material encapsulation 2 is housed in the encapsulation bag 50, the void portion (see the void portion 4 in FIG. 7) in the heat storage material encapsulation pack 1 is a conventional embodiment. As shown in FIG. 6, the heat storage material can be suppressed to 42.0 / 70.8 × 100≈61 (%) as compared with the method of encapsulating the heat storage material in the container. Therefore, in the heat storage material encapsulation pack 1, since the generation of voids is suppressed, the time required for heat conduction between the heat storage material composition 3 and the heat medium 61 in the heat storage tank 60 is shortened as compared with the conventional case. In other words, since heat can be transferred faster during heat storage and heat dissipation in the heat storage material encapsulation pack 1, the responsiveness of storing the exhaust heat from the provider in the heat storage material encapsulation pack 1 and the heat storage material encapsulation pack 1 The responsiveness of supplying the heat radiated from 1 to the supply destination is improved as compared with the conventional case.

Further, in the heat storage material enclosure 2 in which the slurry-like mixture 15 is filled in the leakage prevention inner bag 40, the powdery ammonium myoban dodecahydrate 10, the powdery melting point adjusting agent 21, and the powdery thickener are used. Compared with the case where the powdery mixture mixed with 22 is filled in the leakage prevention inner bag 40, the heat storage material composition 3 produced in the heat storage material enclosure 2 makes the concentration and distribution of its constituent components uniform. Can be prepared in the same state. Further, even if the water 12 is added in excess of the specified amount of water, the excess water 12 coexists with the heat storage material composition 3 in the heat storage material encapsulation pack 1, but the coexisting water 12 also coexists. Similar to the melting point adjusting agent 21, it is considered to contribute to lowering the temperature of the heat storage material composition 3, and if it does not adversely affect the heat storage material composition 3, it remains in the heat storage material encapsulation pack 1. You may do it.

Further, in the method for encapsulating the heat storage material in the container according to the present embodiment, the inorganic salt hydrate 10 is generated in the leakage prevention inner bag 40, and the leakage prevention inner bag 40 is separated from the leakage prevention inner bag 40. Using the larger and more flexible bag-shaped encapsulation bag 50, the leakage prevention inner bag 40 containing the generated inorganic salt hydrate 10 is two encapsulation bags 50 (first encapsulation bag). 50A, 2nd encapsulation bag 50B), in a state of two layers stacked in a double layer like a nest, covered with the encapsulation bag 50, and encapsulated in the encapsulation bag 50 by sealing the encapsulation bag 50. It is characterized by being. Due to this feature, when the anhydride 11 and water 12 or the slurry-like mixture 15 are sealed in the sealing bag 50, the leak-preventing inner bag 40 leaks the anhydride 11 and water 12 or the slurry-like mixture 15. It is possible to prevent scattering and, for example, prevent foreign matter from adhering to the sealing portion 52 that seals the sealing bag 50 by fusion or the like due to the anhydride 11 or the slurry-like mixture 15. As a result, the sealed bag 50 having a double bag structure can be firmly sealed without being hindered by such foreign substances, and the heat storage material composition 3 generated in the leak-preventing inner bag 40 is the sealed bag 50. It can be more reliably housed in the sealed bag 50 without leaking to the outside.

That is, when the baked ammonium myoban 11 (anhydride 11) or the additive aqueous solution 30 is filled in the sealing bag 50, or when the slurry-like mixture 15 is poured into the sealing bag 50, the powder or slurry of the anhydride 11 or the like is used. The state mixture 15 may be spilled in the vicinity of the opening 51 of the encapsulation bag 50 by mistake, and the powder such as the anhydride 11 or the slurry-like mixture 15 adheres to the encapsulation bag 50. If this portion is sealed by fusion or the like while these deposits are in the vicinity of the opening 51, the encapsulation bag 50 cannot be sufficiently sealed and the heat storage material composition 3 spills out from the encapsulation bag 50. Leakage of the heat storage material composition 3 can be more reliably suppressed by accommodating the leakage prevention inner bag 40 in the state of being blocked by the folded-back portion 42 in the sealing bag 50 and sealing the opening 51 of the sealing bag 50. ..

Further, in the method for enclosing the heat storage material in the container according to the present embodiment, the leak-preventing inner bag 40 is filled with the anhydrous sum 11 and water 12 to close the leak-preventing inner bag 40, or the slurry. After filling the state mixture 15 and closing the leakage prevention inner bag 40, the leakage prevention inner bag 40 is housed in the double sealing bag 50 (first sealing bag 50A, second sealing bag 50B) in this state. Both the first encapsulation bag 50A and the second encapsulation bag 50B are characterized in that the opening 51 of the encapsulation bag 50 is sealed while sucking the inside of the encapsulation bag 50. Due to the above-mentioned characteristics, the heat storage material composition 3 generated in the leakage prevention inner bag 40 is in close contact with the sealing bag 50 via the leakage prevention inner bag 40, and the leakage prevention inner bag 40 and the sealing bag It can be enclosed in 50. That is, when the leak-preventing inner bag 40 is filled with the anhydride 11 and water 12 to close the leak-preventing inner bag 40, or the slurry-like mixture 15 is filled to fill the leak-preventing inner bag 40. When the bag 40 is closed, the gap between the powders of the anhydride 11 is filled with water 12, and a solid inorganic salt hydrate 10 having no void inside is generated in the leakage prevention inner bag 40. However, when the leakage prevention inner bag 40 is closed, air enters from the outside. Therefore, a gap 4 is inevitably generated between the latent heat storage material 10 or the like, which is the inorganic salt hydrate 10, and the leakage prevention inner bag 40. However, due to the above-mentioned characteristics, leakage occurs by sealing the opening 51 of each enclosed bag 50 while sucking the inside of the first enclosed bag 50A and the second enclosed bag 50B (encapsulated bag 50) having a double bag structure. The air that has entered the prevention inner bag 40 is excluded, and the heat storage material composition 3 generated in the leakage prevention inner bag 40 is brought into close contact with the sealing bag 50 via the leakage prevention inner bag 40. It can be sealed in the leakage prevention inner bag 40 and the sealing bag 50. Therefore, the adverse effect on heat conduction caused by such a gap can be more effectively and surely suppressed.

Further, in the method for encapsulating the heat storage material in the container according to the present embodiment, after preparing the additive aqueous solution 30 in which the additive 20 (melting point adjusting agent 21 and thickener 22) is dissolved in water 12, the water 12 is replaced. The additive aqueous solution 30 is filled in the leakage prevention inner bag 40, or is mixed with the anhydrous mixture 11 to produce the slurry-like mixture 15. Due to this feature, the heat storage material composition 3 produced in the leakage prevention inner bag 40 can be prepared in a state where the concentration and distribution of the constituent components are made uniform. In particular, when the heat storage material composition 3 collectively generated is subdivided into a plurality of leakage prevention inner bags 40 to produce a plurality of heat storage material encapsulation packs 1, the heat storage generated in each leakage prevention inner bag 40 is produced. The composition of the material composition 3 is kept uniform with the inner bag 40 for preventing all leakage.

That is, conventionally, since a powdery mixture of a latent heat storage material powder and an additive powder is directly filled in each container as it is in a solid state, the latent heat storage material is sandwiched between the containers. An error occurs in the mixing ratio of the additive and the additive, which may adversely affect the heat storage performance capable of transferring heat during heat storage or heat dissipation. However, in the method for encapsulating the heat storage material in the container according to the second embodiment of the present embodiment, the components of the heat storage material composition 3 have a uniform concentration and distribution, so that the heat storage material containing the heat storage material enclosure 2 is contained. Even if a plurality of encapsulation packs 1 are produced, the heat storage performance of each heat storage material encapsulation pack 1 has almost no variation in each heat storage material encapsulation pack 1, and a high quality heat storage material encapsulation pack 1 can be provided.

Further, in the method for encapsulating the heat storage material in a container according to the present embodiment, a water-soluble additive 20 for adjusting the physical properties of the latent heat storage material 10 is blended, and the additive 20 requires the melting point of the latent heat storage material 10. It is characterized by being a melting point adjusting agent 21 that adjusts to a temperature set accordingly, and a thickener 22 that increases the viscosity of the melt of the latent heat storage material 10 in a liquid phase state. Further, in the method for encapsulating the heat storage material in a container according to the present embodiment, the melting point adjusting agent 21 to be blended as the additive 20 is anhydrous sodium sulfate (Na ₂ SO ₄ ). Further, in the method for encapsulating the heat storage material in the container according to the present embodiment, in the heat storage material composition 3 in which the latent heat storage material 10 is mixed with the additive 20, anhydrous sodium sulfate (melting point) occupying the total weight of the heat storage material composition 3 is used. The blending ratio of the adjusting agent 21) is within the range of 10 wt% or less.

Due to this feature, anhydrous sodium sulfate has a melting point of 884 ° C. and is a solid substance at room temperature, but the latent heat storage material 10 has a blending ratio of, for example, 5 wt% with respect to the total weight of the heat storage material composition 3. When added to a certain ammonium myoban (melting point 93.5 ° C.) or the like, the heat storage material composition 3 having a desired melting point of about 90 ° C. can be produced.

In particular, the exhaust heat of the gas engine system and the exhaust heat of about 100 ° C. generated from factories, offices, homes, etc. are stored in the heat storage material composition 3 (latent heat storage material 10) via the heat medium 61, and this is stored. When the heat radiated from the latent heat storage material 10 is mainly supplied to a heat source such as a hot water supply facility or an air conditioning facility, it is desirable that the heat supplied to the heat source is in the temperature range of 80 to 90 ° C. for handling. The ammonium myoban dodecahydrate used as the latent heat storage material 10 has physical properties of a melting point of 93.5 ° C., and the melting point of the latent heat storage material 10 is adjusted to about 90 ° C. by the melting point adjusting agent 21. Further, when the melting point of the heat storage material composition 3 is about 90 ° C., for example, heat is stored in a heat source of 90 ° C. or higher and dissipated in a temperature range of 80 to 90 ° C., thereby performing hot water supply equipment and air conditioning for heating and cooling. As a heat source (energy source) of the equipment, a heat source of about 90 ° C. is convenient for such a hot water supply equipment. Therefore, it can be used in a wide variety of fields in the industrial world.

Further, the reason why the melting point adjusting agent 21 is preferably in the range of 10 wt% or less is that the melting point adjusting agent 21 has a characteristic that heat can be stored in the melting point adjusting agent 21 itself unlike the thickener 22 mannitol. Therefore, if the blending ratio of the melting point adjusting agent 21 becomes too large, the property that heat can be stored in the entire heat storage material composition 3 deteriorates. Therefore, the condition for setting the melting point of the heat storage material composition 3 to a desired temperature of about 90 ° C. while suppressing an extreme decrease in the heat storage characteristics of the entire heat storage material composition 3 is within the range of 10 wt% or less. Further, if the anhydrous sodium sulfate in the heat storage material composition 3 is within such a blending ratio of 10 wt% or less, an environment requiring a temperature of 80 ° C. or higher as a heat source based on exhaust heat of nearly 100 ° C. Below, the heat stored in the latent heat storage material 10 can be dissipated at a high temperature of 80 ° C. or higher for a long time.

Further, in the method for encapsulating the heat storage material in a container according to the present embodiment, the thickener 22 to be blended as the additive 20 is a substance belonging to sugar alcohol. Due to this feature, since the inorganic salt hydrate 10 is an alum hydrate such as ammonium alum 12 hydrate, the thickener 22 is easily dissolved in water, which is a constituent of the inorganic salt hydrate 10, and is composed. The heat storage material composition 3 is chemically stable. Further, the components of the latent heat storage material 10 and the components of the melting point adjusting agent 21 can be kept in a uniform state, and like the latent heat storage material 10, the thickener 22 can also store or dissipate latent heat. It can be provided with a heat storage performance. While the melting point adjusting agent 21 can adjust the melting point of the heat storage material composition 3 to about 90 ° C., the thickener 22 causes non-uniformity between the components of the melting point adjusting agent 21 and the components of the latent heat storage material 10 over time. It has been possible to prevent it from occurring.

Further, in the method for encapsulating the heat storage material in a container according to the present embodiment, the thickener 22 is mannitol (C ₆ H ₁₄ O ₆ ). Due to this feature, mannitol increases the viscosity of the melt of the latent heat storage material 10 in the liquid phase state, and also constitutes the phase separation phenomenon between the components constituting the heat storage material composition 3 and the heat storage material composition 3. For components having different densities, it is possible to prevent non-uniformity between the components due to the difference in density. In addition, mannitol is non-toxic and non-dangerous, so it is easy to handle and inexpensive.

By the way, when a conventional additive having no heat storage performance is blended in the latent heat storage material, the conventional latent heat storage material composition which is a composition of the latent heat storage material and the conventional additive is conventionally used. The heat storage amount of the conventional latent heat storage material composition is significantly lower than that of the latent heat storage material alone, even if the volume is the same as that of the conventional latent heat storage material composition. On the other hand, in the heat storage material composition 3 of the present embodiment, in addition to the thickening, mannitol can store latent heat or dissipate heat together with the main latent heat storage material 10 contained in the heat storage material composition 3. It has performance. Therefore, even if mannitol is added as the additive 20, unlike the conventional additive that does not have the heat storage performance, the heat storage amount of the heat storage material composition 3 is the heat storage of only the latent heat storage material even when compared in the same volume. It is possible to suppress the decrease significantly from the amount.

Further, in the method for encapsulating the heat storage material in the container according to the present embodiment, in the heat storage material composition 3 in which the latent heat storage material 10 is mixed with the additive 20, the thickener 22 accounts for the total weight of the heat storage material composition 3. The compounding ratio is characterized in that it is within the range of 20 wt% or less. Due to this feature, when the melting point adjusting agent 21 is blended in the heat storage material composition 3, the melting point adjusting agent 21 can adjust the melting point of the heat storage material composition 3 to about 90 ° C. without any harmful effect and latent heat. The thickener 22 can stably maintain a state in which the components of the heat storage material 10 and the components of the melting point adjusting agent 21 are diffused in a well-balanced manner without making them non-uniform.

Preferably, when the thickener 22 is blended in the range of 5 to 10 wt%, the thickener 22, mannitol, can store heat in the mannitol itself, although it is relatively small with the latent heat storage material 10. It has characteristics. However, if the blending ratio of mannitol becomes too large, the amount of heat storage that can be stored in the entire heat storage material composition 3 is determined from the maximum value when looking at the relationship between the blending ratio of mannitol and the latent heat storage material 10. It will come off and become smaller. Therefore, it is possible to maintain a larger amount of heat storage by the heat storage material composition 3 while maintaining the retention of the component of the latent heat storage material 10 and the component of the melting point adjusting agent 21 in the heat storage material composition 3 in an appropriate state. The conditions that can be achieved are within the range of the blending ratio of 5 to 10 wt%.

Further, in the method for encapsulating the heat storage material in a container according to the present embodiment, the inorganic salt hydrate 10 is characterized by being alum hydrate. Due to this feature, among various types of inorganic salt hydrates, the latent heat storage material 10 using alum hydrate such as ammonium alum dodecahydrate has a relatively large latent heat due to phase change. Has. Therefore, the latent heat storage material 10 having such physical properties has a relatively large amount of heat storage that can store heat. Further, the heat storage material composition 3 containing the latent heat storage material 10 which is alum hydrate is excellent in that it can have a heat storage and heat dissipation performance of storing a large amount of heat and radiating it.

Further, in the method for encapsulating the heat storage material in a container according to the present embodiment, the alum hydrate 10 is an ammonium alum hydrate or a potassium alum hydrate.

Due to this feature, ammonium alum dodecahydrate and potassium alum dodecahydrate are widely distributed in the market, easily available, and inexpensive.

Although the present invention has been described above with reference to the first and second embodiments, the present invention is not limited to the above embodiments 1 and 2, and is not deviating from the gist thereof. It can be changed and applied as appropriate.

(1) For example, in the embodiment, the heat storage material composition 3 is housed in the leakage prevention inner bag 40 to prepare the heat storage material enclosure 2, and then the heat storage material inclusion 2 is sealed in the first sealing bag 50A. Then, the heat storage material-encapsulated prepack 1A was produced, and the heat storage material-encapsulated prepack 1A was further enclosed in the second encapsulation bag 50B to prepare the heat storage material-encapsulated pack 1. That is, the heat storage material is contained in the heat storage tank 60 by enclosing the heat storage material composition 3 in a container having a triple bag structure of the leakage prevention inner bag 40, the first sealed bag 50A, and the second sealed bag 50B. The enclosed pack 1 was constructed. However, without using the leakage prevention inner bag 40, the flexible bag-shaped encapsulation bag 50 is directly filled with the anhydrous product 11 and water 12 to close the encapsulation bag 50, or in the form of a slurry. After filling the mixture 15 and closing the encapsulation bag 50, the opening 51 of the encapsulation bag 50 is sealed while sucking the inside of the encapsulation bag 50, so that the heat storage material encapsulation pack accommodated in the heat storage tank 60 , May be configured. As a result, the latent heat storage material 10 and the heat storage material composition 3 generated in the sealing bag 50 can be sealed in the sealing bag 50 in close contact with the sealing bag 50, so that the latent heat storage material composition 3 and the heat storage material composition 3 are sealed. The adverse effect on heat conduction caused by the gap between the bag 50 and the bag 50 can be more reliably suppressed. However, in this case, the anhydrous product 11 and the slurry-like mixture 15 can be prevented from spilling out during filling when the sealing bag 50 is sealed, and the foreign matter does not adhere to the vicinity of the opening 51 of the sealing bag 50. This is very important.

(2) Further, in the embodiment, the heat storage material composition 3 in which the melting point adjusting agent 21 and the thickener 22 are mixed as the additive 20 in ammonium myoban dodecahydrate 10 (latent heat storage material 10) is mentioned. However, even if the additive to be blended in the heat storage material composition contains, in addition to the melting point adjusting agent and the thickener, an anticooling agent that promotes the induction of crystallization of the heat storage material in the melted state. good.
(3) Further, in the embodiment, the configuration of the first container is not limited to the configuration of the leakage prevention inner bag 40 illustrated, and can be variously changed. Similarly, the configuration of the second container is not limited to the configuration of the encapsulated bag 50 illustrated, and can be variously changed.

(4) Further, in the embodiment, the heat storage tank 60 using the heat storage material composition 3 is illustrated in FIG. 4, but the heat storage material and the heat storage material composition sealed by the method for enclosing the heat storage material in the container according to the present invention. Regarding a heat storage tank using a material, if the structure is such that the heat storage material composition and the heat medium are partitioned in the heat storage tank and heat can be conducted between the heat storage material composition and the heat medium, the heat storage tank The configuration, shape, and specifications of the above can be anything.
(5) Further, in the embodiment, the melting point of the heat storage material composition 3 is adjusted to about 90 ° C. by blending the melting point adjusting agent 21, but the melting point temperature of the heat storage material composition adjusted by the melting point adjusting agent is about. The temperature is not limited to 90 ° C., and any heat supply destination that utilizes the heat radiated from the heat storage material composition and adjusted to a temperature corresponding to the temperature of the required heat source may be used.
(6) Further, in the embodiment, the heat storage material is a latent heat storage material that stores heat or dissipates heat by moving latent heat due to a phase change, but the heat storage material utilizes the inflow and outflow of reaction heat due to a chemical reaction with water. It is considered that it can also be applied to chemical heat storage materials that store heat or dissipate heat.

3 Heat storage material composition 10 Latent heat storage material, ammonium alum 12 hydrate (heat storage material, inorganic salt hydrate, alum hydrate)
11 Grilled ammonium alum (anhydrous)
12 Water 15 Slurry mixture 20 Additive 21 Melting point adjuster (additive)
22 Thickener (additive)
30 Additive aqueous solution 40 Leakage prevention inner bag (first container)
50 Enclosed bag (second container)
51 opening

Claims (14)

Sealed containers heat storage material that performs heat storage or heat radiation, in the manufacturing method of the contained heat storage apparatus in the thermal storage tank,
The heat storage material shall consist of inorganic salt hydrate.
The container is formed in the shape of a bag having side surfaces.
The inorganic salt anhydride obtained by desorbing the hydrated water contained in the inorganic salt hydrate and the added water are subjected to a hydration reaction in the container to produce the inorganic salt hydrate, and the inorganic salt hydrate is produced in the container. Encapsulating,
The amount of water is equal to or greater than the amount of water required to form a hydrate with respect to the inorganic salt anhydride.
A water-soluble additive that adjusts the physical properties of the heat storage material is blended.
After the additive is dissolved in the water in advance, the inorganic salt anhydride and the water are mixed in the container until the hydration reaction between the inorganic salt anhydride and the water is completed in the container. By solidifying the mixture in the above-mentioned state while standing horizontally in the container, the heat storage material is sealed in the container.
The container in which the heat storage material is sealed is housed in the heat storage tank by arranging the side surface in the longitudinal direction thereof in a horizontal direction.
A method for manufacturing a heat storage device . In the method for manufacturing a heat storage device according to claim 1,
A method for producing a heat storage device , which comprises filling the container with the inorganic salt anhydride and then filling the container with the water in which the additive is dissolved. In the method for manufacturing a heat storage device according to claim 1,
The inorganic salt anhydride is in the form of powder, and a slurry-like mixture is prepared in which the inorganic salt anhydride and the water in which the additive is dissolved are mixed at least in a slurry state.
A method for manufacturing a heat storage device, which comprises filling the container with the slurry-like mixture after preparing the slurry-like mixture. In the method for manufacturing a heat storage device according to claim 2 or 3.
The container must be formed in a flexible bag shape.
After filling the container with the inorganic salt anhydride and the water in which the additive is dissolved to close the container, or after filling the container with the slurry-like mixture to close the container,
The opening of the container is sealed while sucking the inside of the container.
A method for manufacturing a heat storage device . In the method for manufacturing a heat storage device according to claim 4,
The inorganic salt hydrate is produced in the first container as the container.
In addition to the first container, a second container larger than the first container and formed in a flexible bag shape is used.
The first container containing the produced inorganic salt hydrate is
In a single layer with a single container of the second container, or
The second container is covered by the second container in a state of multiple layers stacked in a nested manner by the plurality of the second containers, and by sealing the second container, the second container is sealed. Being enclosed inside,
A method for manufacturing a heat storage device . In the method for manufacturing a heat storage device according to claim 5.
After filling the first container with the inorganic salt anhydride and the water to close the first container, or filling the first container with the slurry-like mixture to close the first container,
In this state, the first container is housed in the second container, and the opening of the second container on the outer side is sealed while sucking at least the outermost second container.
A method for manufacturing a heat storage device . In the method for manufacturing a heat storage device according to any one of claims 1 to 6.
The additive is a melting point adjuster that adjusts the melting point of the heat storage material to a temperature set as necessary, a thickener that increases the viscosity of the melt of the heat storage material in a liquid phase state, or the heat storage material. To prevent the supercooling phenomenon of the above, it must be at least one of the supercooling inhibitors that promotes the induction of crystallization of the heat storage material in the melted state.
A method for manufacturing a heat storage device . In the method for manufacturing a heat storage device according to claim 7.
The melting point adjusting agent to be blended as the additive is anhydrous sodium sulfate (Na ₂ SO ₄ ).
A method for manufacturing a heat storage device . In the method for manufacturing a heat storage device according to claim 8,
In the heat storage material composition in which the additive is blended with the heat storage material,
The blending ratio of the anhydrous sodium sulfate (Na ₂ SO ₄ ) to the total weight of the heat storage material composition shall be within the range of 10 wt% or less.
A method for manufacturing a heat storage device . In the method for manufacturing a heat storage device according to any one of claims 7 to 9.
The thickener to be blended as the additive is a substance belonging to sugar alcohol.
A method for manufacturing a heat storage device . In the method for manufacturing a heat storage device according to claim 10,
The thickener shall be mannitol (C ₆ H ₁₄ O ₆ ).
A method for manufacturing a heat storage device . In the method for manufacturing a heat storage device according to claim 10 or 11.
In the heat storage material composition in which the additive is blended with the heat storage material,
The blending ratio of the thickener to the total weight of the heat storage material composition shall be within the range of 20 wt% or less.
A method for manufacturing a heat storage device . In the method for manufacturing a heat storage device according to any one of claims 1 to 12.
The inorganic salt hydrate must be alum hydrate.
A method for manufacturing a heat storage device . In the method for manufacturing a heat storage device according to claim 13,
Said alum hydrate, ammonium alum dodecahydrate _{(AlNH 4 (SO4) 2 ·} 12H 2 O), or a potassium alum dodecahydrate _{(AlK (SO4) 2 · 12H} 2 O),
A method for manufacturing a heat storage device .

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