JP2022052748A - Heat storage material composition - Google Patents

Abstract

To provide a heat storage material composition which enables heat storage and heat dissipation and can be stably used repeatedly even in a high-temperature environment.SOLUTION: There is provided a heat storage material composition which comprises a solid-liquid phase change material containing zinc nitrate, a nucleating material and a nucleating material aid containing a silicon-containing fine powder or a carbon-containing fine powder. The nucleating material is barium hydroxide and strontium chloride, the silicon-containing fine powder is fly ash or a silica gel and the carbon-containing fine powder is carbon black. The concentration of the nucleating material is in the range of 0.001 wt.% to 0.100 wt.% based on the whole heat storage material composition and the concentration of the nucleating material aid is in the range of 0.050 wt.% to 5.000 wt.% based on the whole heat storage material composition. Thus, heat storage and heat dissipation are enabled and stable repeated use is possible even in a high-temperature environment. The heat storage material composition is useful for a heat storage material in various fields.SELECTED DRAWING: Figure 2

Description

The present invention relates to a heat storage material composition.

Conventionally, a heat storage material (latent heat storage material, sensible heat storage material) that stores heat (heat absorption) and dissipates heat (heat release) by utilizing the phase change (solid-liquid phase change) between a solid and a liquid in a predetermined temperature range. Materials, heat storage materials, etc.) are known. The heat storage material is widely used in various fields such as heating and cooling equipment for buildings (houses, office buildings, etc.) and exhaust heat recovery equipment for factories, which require a large amount of cold heat and heat.

Here, as a technique relating to a heat storage material using zinc nitrate, for example, Japanese Patent Application Laid-Open No. 59-13898 (Patent Document 1) describes zinc nitrate hexahydrate, strontium hydroxide as a nucleating agent, or 8 thereof. A heat storage material is disclosed in which at least one of a hydrate and barium hydroxide or an octahydrate thereof is added. This makes it possible to provide a latent heat storage material that reduces the degree of supercooling during solidification.

Further, in Japanese Patent Application Laid-Open No. 60-44578 (Patent Document 2), sodium acetate trihydrate is selected from the group of anhydrates or hydrates of lithium nitrate, sodium nitrate, potassium nitrate, zinc nitrate and magnesium nitrate. A heat storage material consisting of at least one or more nitrates is disclosed. As a result, it is possible to provide a heat storage material having a melting point lower than that of sodium acetate hexahydrate and having a small decrease in heat storage amount.

Further, Japanese Patent Application Laid-Open No. 60-203690 (Patent Document 3) comprises zinc hydroxide hexahydrate, magnesium hydroxide, magnesium metasilicate, magnesium orthosilicate, magnesium calcium metasilicate, and zinc hydroxide. A heat storage material is disclosed in which a compound selected from the group is added with a solubility or higher in a saturated aqueous solution of zinc nitrate. As a result, it is possible to provide a heat storage material mainly composed of zinc nitrate hexahydrate.

Further, in Japanese Patent Application Laid-Open No. 61-89284 (Patent Document 4), zinc fluoride 4 water salt and / or zinc nitrate 6 water salt is contained in a heat storage material composition containing calcium chloride 6 water salt as a main component. A heat storage material composition compounded as a freezing point adjusting agent is disclosed. Thereby, by using a specific compound as a freezing point adjusting agent, the freezing point can be set to an arbitrary temperature in a wide range with a small compounding ratio, and a heat storage material composition having a high level of latent heat is relatively obtained. It is said that it can be provided at low cost.

Japanese Unexamined Patent Publication No. 59-13898 Japanese Unexamined Patent Publication No. 60-44578 Japanese Unexamined Patent Publication No. 60-203690 Japanese Unexamined Patent Publication No. 61-89284

With the warming of the global environment, the surrounding environment is getting hotter. Therefore, there is a demand for a heat storage material composition capable of causing a solid-liquid phase change even in a high temperature environment and obtaining the effects of heat storage and heat dissipation.

Here, in the heat storage material composition using zinc nitrate as a solid-liquid phase changing material, even if a nucleating material is added, for example, when the lower limit of the temperature of the ambient environment is 30 degrees, which is relatively high, the liquid to solid There is a problem that the effect of heat storage and heat dissipation cannot be obtained because the phase change does not occur. This problem cannot be solved by the technique described in Patent Document 1-4 described above.

Therefore, the present invention has been made to solve the above problems, and provides a heat storage material composition that can store and dissipate heat even in a high temperature environment and can be stably and repeatedly used. The purpose is to do.

The heat storage material composition according to the present invention contains a solid-liquid phase changing material containing zinc nitrate, a nucleation material, and a nucleation auxiliary material containing silicon-containing fine powder or carbon-containing fine powder.

According to the present invention, heat can be stored and dissipated even in a high temperature environment, and stable and repeated use is possible.

It is a composition table of the heat storage material composition of Example 1-3 and Comparative Example 1. It is a graph of the temperature change of the heat storage material composition of Example 1-3 and Comparative Example 1 in the 5th heat cycle. 4 is a composition table of the heat storage material composition of Example 4-6 and Comparative Example 1. It is a graph of the temperature change of the heat storage material composition of Example 4-6 and Comparative Example 1 in the 5th heat cycle. It is a composition table of the heat storage material composition of Example 7-8. It is a graph of the temperature change of the heat storage material composition of Example 7-8 in the heat cycle from the 15th time to the 17th time. It is a composition table of the heat storage material composition of Examples 1-2 and 9. It is a graph of the temperature change of the heat storage material composition of Examples 1-2 and 9 in the 35th heat cycle. It is a composition table of the heat storage material composition of Examples 5 and 10. It is a graph of the temperature change of the heat storage material composition of Examples 5 and 10 in the 25th heat cycle. It is a composition table of the heat storage material composition of Example 11. It is a graph of the temperature change of the heat storage material composition of Example 11 in the 6th heat cycle.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings for the purpose of understanding the present invention. It should be noted that the following embodiment is an example embodying the present invention and does not limit the technical scope of the present invention.

The present inventor has been studying a heat storage material composition using zinc nitrate as a solid-liquid phase change material for many years, and the heat storage material composition containing zinc nitrate has an environmental temperature of, for example, 80 to 30 degrees. It has been confirmed that the solid-liquid phase change material of zinc nitrate does not change phase from liquid to solid even when the temperature drops to the above temperature, and the effects of heat storage and heat dissipation cannot be obtained.

Further, it has been confirmed that even if the environmental temperature is lowered from, for example, 80 degrees to 30 degrees after adding the nucleation material to the heat storage material composition, the phase change of zinc nitrate does not occur. ..

Therefore, the present inventor has further focused on the nucleation auxiliary material and completed the present invention based on the examples described later.

That is, the heat storage material composition according to the present invention contains a solid-liquid phase changing material containing zinc nitrate, a nucleation material, and a nucleation auxiliary material containing silicon-containing fine powder or carbon-containing fine powder. As a result, heat can be stored and dissipated even in a high temperature environment, and stable and repeated use becomes possible.

That is, by adding silicon-containing fine powder or carbon-containing fine powder, when the environmental temperature drops from, for example, a temperature of 80 ° C to 30 ° C, it becomes possible to promote nucleation of the nucleating material, and zinc nitrate can be promoted. It is possible to change the phase of the solid-liquid phase changing material from liquid to solid, and obtain the effects of heat storage and heat dissipation.

In this way, the combination of the nucleating material and the nucleation auxiliary material with respect to the solid-liquid phase changing material containing zinc nitrate can promote the nucleation of the nucleating material, so that the temperature is as high as 80 to 30 degrees. Even in an environment, it is possible to store and dissipate heat in the heat storage material composition.

Further, in the heat cycle in which the temperature is lowered from a high temperature to a low temperature and then raised to a high temperature again, the presence of the silicon-containing fine powder or the carbon-containing fine powder nucleation auxiliary material enables the heat storage material composition to be repeatedly melted and solidified, and heat storage is possible. Stable heat storage and heat dissipation of the material composition and suppress the supercooling phenomenon. Therefore, it can be used repeatedly for a long period of time.

Here, the type of the solid-liquid phase change material containing zinc nitrate is not particularly limited, and for example, zinc nitrate anhydride {Zn (NO ₃ ) ₂ } and its hexahydrate {Zn (NO ₃ ) ₂ . 6H ₂ O} can be adopted. Further, zinc nitrate may be an appropriate combination of anhydrate and hexahydrate.

Although the solid-liquid phase change material other than zinc nitrate has a different phase change temperature range, it undergoes the same phase change as zinc nitrate in a predetermined temperature range, and causes heat storage and heat dissipation. It may contain a solid-liquid phase change material. Examples of other solid-liquid phase change materials include calcium chloride, sodium acetate, sodium hydrogen phosphate and the like. These may be anhydrous or their hydrates. Further, the other solid-liquid phase changing material may be one kind or a combination of two or more kinds as appropriate.

The concentration of the solid-liquid phase changing material is not particularly limited, but is preferably in the range of 75.000% by weight to 99.500% by weight, preferably 80.000% by weight, based on the total heat storage material composition. It is more preferably in the range of ~ 99.500% by weight.

The type of nucleating material is not particularly limited, but for example, barium hydroxide {Ba (OH) ₂ }, barium chloride (BaCl ₂ ), barium dioxide (BaCO ₃ ), barium sulfate (BaSO ₄ ), barium nitrate. {Ba (NO ₃ ) ₂ }, potassium bromide (KBr), sodium bromide (NaBr), strontium chloride (SrCl ₂ ), strontium hydroxide {Sr (OH) ₂ } and the like can be mentioned. Since these nucleating materials form hydrates depending on the type, anhydrous or hydrates thereof may be used, or these may be appropriately combined.

Further, the nucleating material may be one kind or a combination of two or more kinds as appropriate. When two or more kinds of nucleating materials are added, the ratio is not particularly limited. For example, the mixing ratio of barium hydroxide of the first nucleating material and strontium hydroxide of the second nucleating material is a weight ratio. It is preferably in the range of 1.0: 0.2 to 1.0: 2.0, and more preferably in the range of 1.0: 0.5 to 1.0: 1.5 in terms of weight ratio. ..

The concentration of the nucleating material is not particularly limited, but is preferably in the range of 0.001% by weight to 0.100% by weight, preferably 0.001% by weight to 0, based on the total heat storage material composition. It is more preferably in the range of .050% by weight.

The type of silicon-containing fine powder of the nucleus formation auxiliary material is not particularly limited, but for example, fly ash, silica gel, silica sand (quartz sand), glass beads, slag powder, silica cement, diatomaceous earth, and microsilica (silica stone powder). And so on. These silicon-containing fine powders may be used alone or in combination of two or more.

The average particle size of the silicon-containing fine powder is not particularly limited, but is preferably in the range of 0.01 μm to 100.00 μm, and more preferably in the range of 0.1 μm to 50.00 μm. The average particle size of the silicon-containing fine powder can be measured by using, for example, a photon correlation method (dynamic light scattering method) or a laser diffraction / scattering method (static light scattering method).

The type of carbon-containing fine powder of the nucleation auxiliary material is not particularly limited, and examples thereof include carbon black, graphite fine powder, carbon fiber fine powder, and carbon nanotube fine powder. These carbon-containing fine powders may be used alone or in combination of two or more.

Here, carbon black means a spherical or chain-shaped conductive substance of fine powder produced by vapor phase thermal decomposition or incomplete combustion of natural gas or hydrocarbon gas. The type of carbon black is not particularly limited, and examples thereof include acetylene black, furnace black, thermal black, and channel black. These types of carbon black may be combined as appropriate.

The average particle size of the carbon-containing fine powder is not particularly limited, but is preferably in the range of 0.01 μm to 100.00 μm, and more preferably in the range of 0.1 μm to 50.00 μm. The average particle size of the carbon-containing fine powder can be measured by, for example, a photon correlation method or a laser diffraction / scattering method in the same manner as described above.

Further, the nucleation auxiliary material may be of one type or may be a combination of two or more types as appropriate. When two or more types of nucleation auxiliary materials are added, the ratio is not particularly limited. For example, the mixing ratio of the silicon-containing fine powder of the first nucleation auxiliary material and the carbon-containing fine powder of the second nucleation auxiliary material. Is preferably in the range of 1.0: 0.2 to 1.0: 2.0 in terms of weight ratio, and in the range of 1.0: 0.5 to 1.0: 1.5 in terms of weight ratio. It is more preferable to have it.

The concentration of the nucleation auxiliary material is not particularly limited, but is preferably in the range of 0.05% by weight to 5.000% by weight, preferably 0.10% by weight or more, based on the total heat storage material composition. It is more preferably in the range of 3,000% by weight.

The mixing ratio of the nucleating material and the nucleating auxiliary material is not particularly limited, but for example, the mixing ratio of the nucleating material and the nucleating auxiliary material is 1.0: 0.2 to 1. It is preferably in the range of 0: 2.0, and more preferably in the range of 1.0: 0.5 to 1.0: 1.5 in terms of weight ratio.

Further, in the heat storage material composition, other additives may be added in addition to the solid-liquid phase changing material, the nucleation material and the nucleation auxiliary material. Examples of other additives include a melting point adjusting material and a thickening material. The concentration of the other additive is preferably in the range of 0.001% by weight to 20.000% by weight, preferably in the range of 0.001% by weight to 10.000% by weight, based on the total heat storage material composition. It is more preferable to have it.

The method of using the heat storage material composition is not particularly limited, and examples thereof include a method of filling and sealing the heat storage material composition in a container and using the heat storage material as the heat storage material. Since the heat conductivity of the heat storage material composition is high, the shape of the container is not particularly limited, and the design can be appropriately changed according to the application such as plate shape and columnar shape.

The use of the heat storage material composition is not particularly limited, and is used, for example, for heating / cooling equipment, factory exhaust heat recovery equipment, agricultural equipment such as vinyl houses, terminal equipment, electronic equipment such as portable terminal equipment, automobiles / buses, and the like. It can be used as a heat storage material for used position identification devices and the like. As a method of using the heat storage material, heat energy can be effectively used by storing heat from the surrounding environment in the daytime and dissipating heat to the surrounding environment at night. In particular, the heat storage material composition according to the present invention can store and dissipate heat even in a high temperature environment.

Hereinafter, examples, comparative examples, and the like in the present invention will be specifically described, but the application of the present invention is not limited to the present examples and the like.

<Example 1>
Solid-liquid phase change material (zinc nitrate hexahydrate) {Zn (NO ₃ ) _{2.6H 2 O} } was 99.495% by weight, and nucleation material (barium hydroxide) {Ba (OH) ₂ } was 0. The heat storage material composition was produced by adjusting 005% by weight and the nucleation auxiliary material (fly ash) to 0.500% by weight. The freezing point (melting point) of the heat storage material composition was set to 35 ° C. with zinc nitrate. This produced heat storage material composition was designated as Example 1. The concentration of the nucleation material is set to a low concentration in order to confirm the effect of the nucleation aid.

<Comparative Example 1>
In the heat storage material composition of Example 1, the solid-liquid phase changing material was 99.980% by weight, and the nucleating material was barium hydroxide 0.010% by weight and strontium chloride _{dihydrate (SrCl 2.2H 2 )} . An heat storage material composition was produced by adjusting in the same manner as in Example 1 except that 0.010% by weight of O) was added and no nucleation auxiliary material was added. The produced heat storage material composition was designated as Comparative Example 1.

<Example 2>
In the heat storage material composition of Example 1, the heat storage material composition was produced by adjusting in the same manner as in Example 1 except that the fly ash of the nucleation auxiliary material was changed to carbon black (furness black). This produced heat storage material composition was designated as Example 2.

<Example 3>
In the heat storage material composition of Example 1, the solid-liquid phase changing material was 98.995% by weight, and 0.500% by weight of silica gel was added together with 0.500% by weight of fly ash as a nucleation auxiliary material. The heat storage material composition was produced by adjusting in the same manner as in Example 1. This produced heat storage material composition was designated as Example 3.

<Example 4>
In the heat storage material composition of Example 1, the solid-liquid phase changing material was 99.480% by weight, and as the nucleating material, barium hydroxide was 0.010% by weight and strontium chloride dihydrate was 0.010% by weight. A heat storage material composition was produced by adjusting in the same manner as in Example 1 except that it was added. This produced heat storage material composition was designated as Example 4.

<Example 5>
In the heat storage material composition of Example 1, the solid-liquid phase changing material was 99.485% by weight, and as the nucleating material, barium hydroxide was 0.010% by weight and strontium chloride dihydrate was 0.010% by weight. A heat storage material composition was produced by adjusting in the same manner as in Example 1 except that the fly ash of the nucleation auxiliary material was changed to carbon black (furness black). This produced heat storage material composition was designated as Example 5.

<Example 6>
In the heat storage material composition of Example 1, the solid-liquid phase changing material was 98.985% by weight, and as the nucleating material, barium hydroxide 0.010% by weight and strontium chloride dihydrate 0.010% by weight were used. A heat storage material composition was produced by adjusting in the same manner as in Example 1 except that 0.500% by weight of fly ash and 0.500% by weight of silica gel were added as a nucleation auxiliary material. This produced heat storage material composition was designated as Example 6.

<Evaluation method>
For the heat storage material compositions of Examples 1-6 and Comparative Example 1, the ambient temperature of each heat storage material composition was lowered from about 80 ° C. to about 30 ° C. (cooling) in a predetermined time, and then from about 30 ° C. again. The temperature change of each heat storage material composition was measured by repeating the heat cycle of the operation of raising (heating) to 80 ° C. a predetermined number of times.

<Evaluation result>
FIG. 1 shows a composition table of the heat storage material composition of Example 1-3 and Comparative Example 1. FIG. 2 shows graphs of temperature changes of the heat storage material composition of Example 1-3 and Comparative Example 1 in the fifth heat cycle. As shown in FIG. 2, in the heat storage material composition of Comparative Example 1 in which barium hydroxide and strontium chloride, which are two types of nucleating materials, are added during cooling of the heat cycle, supercooling occurs and the graph shows. It is understood that there is no rise. On the other hand, in the heat storage material composition of Example 1-2 in which one kind of silicon-containing fine powder or one kind of carbon-containing fine powder nucleation auxiliary material is added to one kind of nucleation material, the heat storage material composition of Example 1-2 does not cause supercooling. It is understood that the rising edge of the graph corresponding to the endothermic is seen. Further, in the heat storage material composition of Example 3 in which two types of silicon-containing fine powder nucleation auxiliary materials are added to one type of nucleation material, the graph corresponding to endothermic rise is accelerated. Understood.

Further, at the time of heating in the heat cycle, the heat storage material composition of Example 1-3 has a higher heating temperature per unit time and a faster heating rate than the heat storage material composition of Comparative Example 1, and is a graph. It is understood that the rise of is faster.

FIG. 3 shows a composition table of the heat storage material composition of Example 4-6 and Comparative Example 1. FIG. 4 shows graphs of temperature changes of the heat storage material composition of Example 4-6 and Comparative Example 1 in the fifth heat cycle. As shown in FIG. 4, in the heat storage material composition of Example 4-5, in which one kind of silicon-containing fine powder nucleation auxiliary material is added to two kinds of nucleation materials at the time of cooling in the heat cycle. Similar to the above, it is understood that the rising edge of the graph corresponding to the endothermic is seen without causing supercooling. Further, in the heat storage material composition of Example 6 in which two types of silicon-containing fine powder nucleation auxiliary materials are added to two types of nucleation materials, the graph corresponding to endothermic rise is accelerated. Understood.

Further, at the time of heating in the heat cycle, the heat storage material composition of Example 4-6 has a higher heating temperature per unit time and a faster heating rate than the heat storage material composition of Comparative Example 1, and is a graph. It is understood that the rise of is faster.

<Example 7>
In the heat storage material composition of Example 1, the solid-liquid phase changing material was 97.985% by weight, and as the nucleating material, barium hydroxide 0.005% by weight and strontium chloride dihydrate 0.010% by weight were used. Adjusted in the same manner as in Example 1 except that 0.500% by weight of fly ash, 0.500% by weight of silica gel, and 1.000% by weight of carbon black were added as nucleation auxiliary materials. A heat storage material composition was produced. This produced heat storage material composition was designated as Example 7.

<Example 8>
In the heat storage material composition of Example 1, the solid-liquid phase changing material was 97.985% by weight, and as the nucleating material, barium hydroxide 0.005% by weight and strontium chloride dihydrate 0.010% by weight were used. Adjusted in the same manner as in Example 1 except that 0.500% by weight of fly ash, 1.000% by weight of silica gel, and 0.5% by weight of carbon black were added as nucleation auxiliary materials. A heat storage material composition was produced. This produced heat storage material composition was designated as Example 8. In addition, FIG. 5 shows the composition table of the heat storage material composition of Example 7-8. Examples 7-8 were evaluated by the same evaluation method as described above, with the cooling temperature set to about 15 ° C and the heating temperature set to about 80 ° C.

<Evaluation result>
FIG. 6 shows a graph of the temperature change of the heat storage material composition of Example 7-8 in the 15th to 17th heat cycles. In addition, FIG. 6 also shows the atmospheric temperature. As shown in FIG. 6, in the heat storage material composition of Example 7-8 to which three kinds of nucleation auxiliary materials are added during the cooling of the heat cycle, the rise of the graph corresponding to the endothermic is seen. Is understood. Further, it is understood that in the heat storage material composition of Example 7-8, the heating temperature per unit time is large, the heating rate is high, and the rise of the graph is quick during the heating of the heat cycle.

<Example 9>
In the heat storage material composition of Example 1, the solid-liquid phase changing material was set to 98.995% by weight, barium hydroxide was added in an amount of 0.005% by weight as the nucleating material, and strontium chloride dihydrate was not passed on. As a nucleation auxiliary material, the heat storage material composition was adjusted in the same manner as in Example 1 except that 0.500% by weight of silica gel and 0.500% by weight of carbon black were added without adding fly ash. Manufactured. This produced heat storage material composition was designated as Example 9. In addition, FIG. 7 shows the composition table of the heat storage material composition of Examples 1-2 and 9. Examples 1-2 and 9 were evaluated by the same evaluation method as described above, with the cooling temperature set to about 15 ° C and the heating temperature set to about 80 ° C.

<Evaluation result>
FIG. 8 shows a graph of the temperature change of the heat storage material composition of Examples 1-2 and 9 in the 35th heat cycle. In addition, FIG. 8 also shows the atmospheric temperature. As shown in FIG. 8, even in the heat storage material composition of Example 9 to which one type of nucleation material and two types of nucleation auxiliary materials are added during cooling of the heat cycle, Example 1-. Similar to the heat storage material composition of No. 2, it is understood that the rise of the graph corresponding to the endothermic is seen and the rise of the graph with respect to the heat dissipation is faster.

<Example 10>
In the heat storage material composition of Example 1, the solid-liquid phase changing material was 99.485% by weight, the nucleating material was 0.005% by weight of barium hydroxide, and 0.010% by weight of strontium chloride dihydrate. A heat storage material composition was produced by adjusting in the same manner as in Example 1 except that 0.500% by weight of carbon black was added without adding fly ash and silica gel as a nucleation auxiliary material. .. This produced heat storage material composition was designated as Example 10. Note that FIG. 9 shows a composition table of the heat storage material compositions of Examples 5 and 10. Examples 5 and 10 were evaluated by the same evaluation method as described above, with the cooling temperature set to about 15 ° C and the heating temperature set to about 80 ° C.

<Evaluation result>
FIG. 10 shows a graph of the temperature change of the heat storage material composition of Examples 5 and 10 in the 25th heat cycle. In addition, FIG. 10 also shows the atmospheric temperature. As shown in FIG. 10, even in the heat storage material composition of Example 10 to which two kinds of nucleation materials and one kind of nucleation auxiliary material are added at the time of cooling of the heat cycle, the heat storage material composition of Example 5 Similar to the heat storage material composition, it is understood that the rise of the graph corresponding to the endothermic is seen and the rise of the graph with respect to the heat dissipation is faster.

<Example 11>
In the heat storage material composition of Example 1, the solid-liquid phase changing material was 99.490% by weight, and 0.010% by weight of strontium chloride dihydrate was added as the nucleating material without adding barium hydroxide. The heat storage material composition was produced in the same manner as in Example 1 except that 0.500% by weight of carbon black was added without adding fly ash and silica gel as the nucleation auxiliary material. This produced heat storage material composition was designated as Example 11. Note that FIG. 11 shows a composition table of the heat storage material composition of Example 11. Example 11 was evaluated by the same evaluation method as described above, with the cooling temperature set to about 15 ° C and the heating temperature set to about 80 ° C.

<Evaluation result>
FIG. 12 shows a graph of the temperature change of the heat storage material composition of Example 11 in the sixth heat cycle. In addition, FIG. 12 also shows the atmospheric temperature. As shown in FIG. 12, even in the case of the heat storage material composition of Example 11 to which one type of nucleation material and one type of nucleation auxiliary material are added during cooling of the heat cycle, the same as described above. It is understood that the rise of the graph corresponding to the endothermic is seen, and the rise of the graph for heat dissipation is faster.

As a result, by adding a nucleation auxiliary material containing silicon-containing fine powder or carbon-containing fine powder to the solid-liquid phase change material containing zinc nitrate and the nucleation material, heat storage is performed even in a high temperature environment.・ It was found that heat can be dissipated and stable and repeated use is possible.

As described above, the heat storage material composition according to the present invention is useful as a heat storage material in various fields, and can store and dissipate heat even in a high temperature environment and can be used stably and repeatedly. It is effective as a heat storage material composition.

Claims (3)

Solid-liquid phase change material containing zinc nitrate,
Nucleating material and
Nucleation aids containing silicon-containing fine powder or carbon-containing fine powder,
A heat storage material composition containing. The nucleating material is barium hydroxide or strontium chloride.
The silicon-containing fine powder is fly ash or silica gel.
The carbon-containing fine powder is carbon black.
The heat storage material composition according to claim 1. The concentration of the nucleating material is in the range of 0.001% by weight to 0.100% by weight with respect to the total heat storage material composition.
The concentration of the nucleation auxiliary material is in the range of 0.050% by weight to 5.000% by weight with respect to the total heat storage material composition.
The heat storage material composition according to claim 2.

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