heat storage material composition

Abstract

The present invention provides a heat storage material composition having a melting point of 27°C or lower and a large latent heat of fusion within a narrow melting temperature range. [Solution] The heat storage material composition contains a main component mixture consisting of anhydrous calcium chloride, ammonium chloride, and water, and when the content of anhydrous calcium chloride in 100% by mass of the main component mixture is CA by mass%, the content of ammonium chloride is NH by mass%, and the content of water is W by mass%, the parameters X and Y defined by the following formulas (P1) and (P2) satisfy the following formulas (1) to (5). X = 100 × CA / (CA + W)(P1) Y = 100 × NH / (CA + NH + W) (P2) X-51.75>0(1) 52.75 - X > 0 (2) 4.25-Y>0(3) 1.2245X+Y-66.367>0(4) -2.1569X+Y+110.27>0(5)

Description

Technical Field

[0001] The present invention relates to a heat storage material composition.

Background Art

[0002] Conventionally, a latent heat storage material composition that utilizes the latent heat generated or absorbed during the phase change from a liquid to a solid or from a solid to a liquid is known. The latent heat storage material composition is used, for example, in a heat storage system for air conditioning in a building. Hereinafter, the latent heat storage material composition is simply referred to as a "heat storage material composition".

[0003] It is desired that the heat storage material composition has a sufficient heat storage effect stably in a required temperature range. For this reason, for example, when the heat storage material composition is used in a heat storage system for air conditioning in a building, it is desired that the heat storage material composition has a large heat storage amount, and that the melting point and freezing point of the heat storage material composition match or approximate the usage conditions in air conditioning of the building. Here, the melting point means the temperature at which the heat storage material composition melts in the temperature rising process of heating the heat storage material composition, and the freezing point means the temperature at which the heat storage material composition solidifies in the cooling process of cooling the heat storage material composition.

[0004] In addition, it is desirable that the melting point of the heat storage material composition used in the heat storage system for air conditioning in a building is 27°C or lower.

[0005] Further, it is preferable that the heat storage material composition used in the heat storage system for air conditioning in a building has a small melting temperature range and a large latent heat of fusion within this melting temperature range. Here, the melting temperature range means the temperature range from the start to the end of melting, specifically, the difference ΔT (= T2 - T1) between "the temperature T1 at which the melting of the heat storage material composition starts and the liquid phase starts to occur" and "the temperature T2 at which the melting of the heat storage material composition is completed and it becomes entirely in the liquid phase" in the temperature rising process. In other words, it is desired that the heat storage material composition used in the heat storage system for air conditioning in a building has a large latent heat of fusion at a small melting temperature range.

[0006] As a conventional heat storage material composition, Patent Document 1 discloses a heat storage material composition in which ammonium salts such as ammonium chloride, ammonium bromide, and ammonium nitrate are added to calcium chloride hexahydrate. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 59-109578 [Overview of the Initiative] [Problems that the invention aims to solve]

[0008] However, the heat storage material composition described in Patent Document 1 has a melting point exceeding 27°C, making it unsuitable for use in heat storage systems for heating and cooling buildings. Furthermore, the heat storage material composition described in Patent Document 1 has a wide melting temperature range.

[0009] This invention has been made in view of the problems of the prior art. The object of this invention is to provide a heat storage material composition that has a melting point of 27°C or lower and a large latent heat of fusion over a narrow melting temperature range. [Means for solving the problem]

[0010] A heat storage material composition according to an aspect of the present invention comprises a main component mixture consisting of anhydrous calcium chloride, ammonium chloride, and water, wherein when the content of anhydrous calcium chloride in 100% by mass of the main component mixture is CA by mass%, the content of ammonium chloride is NH by mass%, and the content of water is W by mass%, the parameters X and Y defined by the following formulas (P1) and (P2) satisfy the following formulas (1) to (5).

[0011] [Mathematics 1] X = 100 × CA / (CA + W) (P1) [Math 2] Y = 100 × NH / (CA + NH + W) (P2) [Math 3] X - 51.75 > 0 (1) [Number 4] 52.75 - X > 0 (2) [Number 5] 4.25 - Y > 0 (3) [Number 6] 1.2245X + Y - 66.367 > 0 (4) [Number 7] - 2.1569X + Y + 110.27 > 0 (5) [Advantages of the Invention]

[0012] According to the present invention, it is possible to provide a heat storage material composition having a melting point of 27°C or lower and a large latent heat of fusion with a small melting temperature range. Specifically, the latent heat of fusion in the small melting temperature range is defined as the latent heat of fusion at 25°C or higher and 28°C or lower. [Brief Description of the Drawings]

[0013] [Figure 1] It is a specific parameter representation diagram showing the composition of the heat storage material composition by specific parameters. [Figure 2] It is a graph showing the degree of supercooling. [Figure 3] It is a graph showing the degree of supercooling. [Modes for Carrying Out the Invention]

[0014] Hereinafter, the heat storage material composition according to the present embodiment will be described in detail.

[0015] [Heat Storage Material Composition] The heat storage material composition according to the present embodiment includes a main agent mixture composed of calcium chloride anhydride, ammonium chloride, and water.

[0016] (Main Agent Mixture) The main agent mixture is composed of calcium chloride anhydride, ammonium chloride, and water. Calcium chloride anhydride is a heat storage substance. Calcium chloride anhydride generally causes a large supercooling phenomenon. Ammonium chloride is a melting point depressant.

[0017] <Anhydrous calcium chloride> As the anhydrous calcium chloride (CaCl2), known types can be used.

[0018] In the heat storage material composition according to this embodiment, 100% by mass of the main component mixture typically contains 45.0 to 55.0% by mass, preferably 50.0 to 54.0% by mass, and more preferably 51.0 to 53.0% by mass of anhydrous calcium chloride. Here, 100% by mass of the main component mixture means that the total amount of anhydrous calcium chloride, ammonium chloride, and water is 100% by mass. When the content of anhydrous calcium chloride is within the above range, the melting point of the heat storage material composition is 27°C or lower, and the latent heat of fusion at 25°C to 28°C tends to be large.

[0019] <Ammonium chloride> Any known ammonium chloride (NH4Cl) can be used.

[0020] In the heat storage material composition according to this embodiment, 100% by mass of the main component mixture contains ammonium chloride in a quantity of typically 1.0 to 5.0% by mass, preferably 2.0 to 4.0% by mass, and more preferably 2.5 to 3.5% by mass. When the ammonium chloride content is within the above range, the melting point of the heat storage material composition is 27°C or lower, and the latent heat of fusion at temperatures between 25°C and 28°C tends to be high.

[0021] <Water> For example, pure water can be used as the water source.

[0022] In the heat storage material composition according to this embodiment, 100% by mass of the main component mixture contains water, typically 43.0 to 50.0% by mass, preferably 45.5 to 48.5% by mass, and more preferably 46.0 to 48.0% by mass. When the water content is within the above range, the melting point of the heat storage material composition is 27°C or lower, and the latent heat of fusion at temperatures between 25°C and 28°C tends to be high.

[0023] <Composition of the heat storage material> The composition of the heat storage material composition can be expressed by parameters X and Y defined by the following formulas (P1) and (P2), using the content of anhydrous calcium chloride, ammonium chloride, and water in 100% by mass of the main component mixture. Specifically, when the content of anhydrous calcium chloride in 100% by mass of the main component mixture is CA by mass%, the content of ammonium chloride is NH by mass%, and the content of water is W by mass%, the composition can be expressed by parameters X and Y defined by the following formulas (P1) and (P2). [Number 8] X = 100 × CA / (CA + W) (P1) [Number 9] Y = 100 × NH / (CA + NH + W) (P2)

[0024] Furthermore, if the parameters X and Y satisfy the following formulas (1) to (5), the heat storage material composition is preferable because its melting point is 27°C or lower, and its latent heat of fusion at temperatures between 25°C and 28°C tends to be high. [Number 10] X - 51.75 > 0 (1) [Number 11] 52.75 - X > 0 (2) [Number 12] 4.25-Y>0 (3) [Number 13] 1.2245X+Y-66.367>0 (4) [Number 14] -2.1569X+Y+110.27>0 (5)

[0025] [Specific Parameter Representation Diagram] Figure 1 shows the range in which parameters X and Y satisfy equations (1) to (5). Figure 1 is a specific parameter representation diagram showing the composition of the heat storage material composition with specific parameters. In Figure 1, the pentagonal region that satisfies the above equations (1) to (5) is indicated by the symbol R. Furthermore, among the sides that make up the outer perimeter of the pentagon of symbol R, the sides that satisfy each of the above equations (1) to (5) are indicated as F1 to F5, respectively.

[0026] (Supercooling inhibitor) The heat storage material composition according to this embodiment is preferable if it further contains a supercooling inhibitor, as this further suppresses supercooling. The degree of supercooling is indicated, for example, by the degree of supercooling. Here, the degree of supercooling is the freezing point T F and supercooling temperature T S (T F ≧T S This represents the difference from ). Supercooling temperature T S This can be measured by observing the change in surface temperature of a sample placed in a constant temperature bath using a resistance thermometer.

[0027] As a supercooling inhibitor, at least one supercooling inhibitor selected from the group consisting of, for example, strontium chloride hexahydrate, strontium hydroxide octahydrate, barium hydroxide octahydrate, strontium chloride, strontium hydroxide, barium hydroxide, calcium hydroxide, aluminum hydroxide, graphite, aluminum, titanium dioxide, hectorite, smectite clay, bentonite, laponite, propylene glycol, ethylene glycol, glycerin, ethylenediaminetetraacetic acid, sodium alkyl sulfate, sodium alkyl phosphate, potassium alkyl sulfate, and potassium alkyl phosphate is used. Strontium hydroxide octahydrate or strontium hydroxide is preferred as the supercooling inhibitor because it further suppresses supercooling.

[0028] The heat storage material composition according to this embodiment is preferable if it contains 100 parts by mass of the main component mixture and 0.3 to 1.1 parts by mass of strontium hydroxide octahydrate or strontium hydroxide, as this further suppresses supercooling. The heat storage material composition according to this embodiment may also contain 100 parts by mass of the main component mixture and 0.5 to 1.0 parts by mass of strontium hydroxide octahydrate or strontium hydroxide.

[0029] (Supercooling suppression additive) The heat storage material composition according to this embodiment is preferable if it further contains a supercooling suppression additive in addition to the supercooling suppressant, as this further suppresses supercooling.

[0030] As a supercooling suppression additive, one or more substances selected from the group consisting of decanoic acid, diatomaceous earth, rayon, octadecane, sodium monododecyl phosphate, 1-propanol, polyester nonwoven fabric, polyester fiber, alumina, bromooctadecane, 2-propanol, and glycerin can be used. It is preferable that the supercooling suppression additive consists of the above substances because it can reduce the degree of supercooling.

[0031] For example, Dilla® is used as the polyester nonwoven fabric. For example, fibers obtained by crushing Dilla are used as the polyester fibers.

[0032] There are preferred combinations of supercooling inhibitors and supercooling inhibitor additives. For example, if the supercooling inhibitor is strontium hydroxide octahydrate, it is preferable that the supercooling inhibitor is one or more substances selected from the group consisting of decanoic acid, rayon, octadecane, sodium monododecyl phosphate, 1-propanol, polyester nonwoven fabric, polyester fiber, and alumina, as this further suppresses supercooling.

[0033] The heat storage material composition according to this embodiment is preferable because it is easier to reduce the degree of supercooling if it contains 100 parts by mass of the main component mixture, 0.3 to 1.1 parts by mass of strontium hydroxide octahydrate, and 0.4 to 1.1 parts by mass of a supercooling suppression additive. The heat storage material composition according to this embodiment is more preferable because it is easier to reduce the degree of supercooling if it contains 100 parts by mass of the main component mixture, 0.5 to 1.0 parts by mass of strontium hydroxide octahydrate, and 0.4 to 1.1 parts by mass of a supercooling suppression additive. The heat storage material composition according to this embodiment is even more preferable because it is easier to reduce the degree of supercooling if it contains 100 parts by mass of the main component mixture, 0.5 to 1.0 parts by mass of strontium hydroxide octahydrate, and 0.5 to 1.0 parts by mass of a supercooling suppression additive.

[0034] Furthermore, when the supercooling inhibitor is strontium hydroxide, it is preferable that the supercooling inhibitor is one or more substances selected from the group consisting of octadecane, rayon, diatomaceous earth, bromooctadecane, 1-propanol, alumina, polyester nonwoven fabric, 2-propanol, glycerin, and monododecyl sodium phosphate, as this further suppresses supercooling.

[0035] The heat storage material composition according to this embodiment is preferable if it contains 100 parts by mass of the main component mixture, 0.3 to 1.1 parts by mass of strontium hydroxide, and 0.05 to 3.1 parts by mass of a supercooling suppression additive, as this makes it easier to reduce the degree of supercooling. The heat storage material composition according to this embodiment is more preferable if it contains 100 parts by mass of the main component mixture, 0.3 to 1.1 parts by mass of strontium hydroxide, and 0.4 to 3.1 parts by mass of a supercooling suppression additive, as this makes it easier to reduce the degree of supercooling. The heat storage material composition according to this embodiment is even more preferable if it contains 100 parts by mass of the main component mixture, 0.5 to 1.0 parts by mass of strontium hydroxide, and 0.5 to 3.0 parts by mass of a supercooling suppression additive, as this makes it easier to reduce the degree of supercooling.

[0036] (Thickening agent) The heat storage material composition according to this embodiment is preferable if it further contains a thickening agent, as this suppresses phase separation and improves the stability of its heat storage performance over a long period of time. Examples of such thickening agents include at least one thickening agent selected from the group consisting of sodium silicate, water glass, polyacrylic acid, sodium polyacrylate, polycarboxylate polyether polymer, sodium acrylic acid-maleic acid copolymer, sodium acrylic acid-sulfonic acid monomer copolymer, acrylamide-dimethylaminoethyl methacrylate-dimethyl sulfate copolymer, acrylamide-sodium acrylate copolymer, polyethylene glycol, polypropylene glycol, superabsorbent polymer (SAP), carboxymethylcellulose (CMC), derivatives of CMC, carrageenan, carrageenan derivatives, xanthan gum, xanthan gum derivatives, pectin, pectin derivatives, starch, starch derivatives, konjac, agar, layered silicate, and composites of these substances.

[0037] (Melting point depressant) The heat storage material composition according to this embodiment can have its melting point further lowered if it further contains a melting point depressant. For this reason, it is preferable for the heat storage material composition to further contain a melting point depressant because it makes it easier to adjust the melting point of the heat storage material composition to match or approach the optimal melting point of the heat storage system. As such a melting point depressant, for example, at least one melting point depressant selected from the group consisting of sodium chloride, potassium chloride, sodium nitrate, sodium bromide, ammonium chloride, ammonium bromide, ammonium sulfate, ammonium nitrate, ammonium phosphate, and urea can be used.

[0038] (characteristic) The heat storage material composition according to this embodiment has a melting point of 27°C or lower, and a latent heat of fusion of 165 J / g or more at temperatures between 25°C and 28°C. The melting point was measured using a differential scanning calorimeter (DSC). Specifically, for the endothermic peak measured by the DSC during melting, the intersection point of the baseline at the start of melting and the tangent line at the inflection point of the peak at the start of melting was determined, and the temperature at this intersection point was defined as the melting point. The latent heat of fusion between 25°C and 28°C was measured by DSC. Specifically, the latent heat of fusion was calculated by integrating the endothermic peak during melting measured by DSC within the range of 25°C to 28°C, and this was defined as the latent heat of fusion between 25°C and 28°C. [Examples]

[0039] The embodiment will be described in more detail below with reference to examples and comparative examples, but the embodiment is not limited to these examples.

[0040] [Example 1] (Preparation of heat storage material composition) Anhydrous calcium chloride (CaCl2, manufactured by Kishida Chemical Co., Ltd., special grade), ammonium chloride (NH4Cl, manufactured by Kishida Chemical Co., Ltd., special grade), and pure water were mixed in predetermined amounts totaling approximately 5g. The amounts of anhydrous calcium chloride, ammonium chloride, and pure water were adjusted so that the resulting heat storage material composition would have the composition shown in Table 1. When the resulting mixture was heated in a water bath at 50°C or higher, a heat storage material composition was obtained (Sample No. A13). The heat storage material composition consists of anhydrous calcium chloride, ammonium chloride, and pure water, and is composed solely of a so-called main component mixture.

[0041] [Table 1]

[0042] In a 100% mass mixture of the main component, the content of anhydrous calcium chloride was defined as CA by mass%, the content of ammonium chloride as NH by mass%, and the content of water as W by mass. Parameters X and Y were calculated using the following formulas (P1) and (P2). The results are shown in Table 1. [Number 15] X = 100 × CA / (CA + W) (P1) [Number 16] Y = 100 × NH / (CA + NH + W) (P2)

[0043] Furthermore, the obtained parameters X and Y satisfied the following equations (1) to (5). [Number 17] X - 51.75 > 0 (1) [Number 18] 52.75 - X > 0 (2) [Number 19] 4.25-Y>0 (3) [Number 20] 1.2245X+Y-66.367>0 (4) [Number 21] -2.1569X+Y+110.27>0 (5)

[0044] (Specific parameter representation diagram) Furthermore, the obtained parameters X and Y are shown in Figure 1. Figure 1 is a specific parameter representation diagram showing the composition of the heat storage material composition using specific parameters. In Figure 1, the pentagonal region satisfying the above equations (1) to (5) is indicated by the symbol R. Also, among the sides that make up the outer perimeter of the pentagon of symbol R, the sides that satisfy each of the above equations (1) to (5) are indicated by F1 to F5, respectively. The composition of the heat storage material for sample No. A13 is plotted in Figure 1. In Figure 1, plots located within the pentagonal region R that satisfies equations (1) to (5) above are indicated by the symbol ○, and plots located outside the region R that do not satisfy equations (1) to (5) above are indicated by the symbol ×. The plot of the heat storage material composition for sample No. A13 is indicated by the symbol ○.

[0045] (Measuring the melting point) A 20 mg sample of the heat storage material composition was taken and subjected to thermal analysis using differential scanning calorimeter (DSC). For the endothermic peak obtained during melting, the intersection point of the baseline at the start of melting and the tangent line at the inflection point of the peak at the start of melting was determined, and the temperature at this intersection point was defined as the melting point.

[0046] (Measurement of latent heat of fusion at temperatures between 25°C and 28°C) The latent heat of fusion, calculated by integrating the endothermic peaks obtained during melting from DSC within the range of 25°C to 28°C, was defined as the latent heat of fusion between 25°C and 28°C.

[0047] These results are shown in Table 1.

[0048] [Examples 2-10, Comparative Examples 1-19] The amount of each component added was adjusted so that the resulting heat storage material composition had the composition shown in Table 1, and the heat storage material composition was prepared using the same procedure as in Example 1 (Samples No. A1-A12, A14-A29). (Specific parameter representation diagram) For samples No. A1-A12 and A14-A29, the composition of the heat storage material was plotted in Figure 1 in the same manner as in Example 1.

[0049] For samples No. A1-A12 and A14-A29, the melting point and latent heat of fusion at temperatures between 25°C and 28°C were measured in the same manner as in Example 1. The results are shown in Table 1.

[0050] From Table 1 and Figure 1, it can be seen that the experimental examples plotted within the symbol R that satisfy each of the above equations (1) to (5), and indicated by the symbol ○, have a melting point of 27°C or lower, and a large latent heat of fusion between 25°C and 28°C.

[0051] [Examples 11-23] (Preparation of heat storage material composition) First, the main component mixture of Example 2 (Sample No. A14) was prepared. In addition, strontium hydroxide octahydrate Sr(OH)2·8H2O (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) was prepared as a supercooling inhibitor. Next, heat storage material compositions were prepared by mixing 100 parts by mass of the main component mixture of sample No. A14, Sr(OH)2·8H2O, and, if necessary, a supercooling suppression additive, in the proportions shown in Table 2 (samples No. B1 to B13).

[0052] The supercooling suppression additives shown in Table 2 are as follows: Decanoic acid: Manufactured by Kishida Chemical Co., Ltd. • Diatomaceous earth: Manufactured by Fujifilm Wako Pure Chemical Industries, Ltd., average particle size 50 μm • Rayon: Manufactured by Unitika Ltd., fiber diameter 1 mm, fiber length 10 mm • Octadecane: Manufactured by Fujifilm Wako Pure Chemical Corporation • Monododecyl sodium phosphate: Manufactured by Tokyo Chemical Industry Co., Ltd. • 1-Propanol: Manufactured by Kishida Chemical Co., Ltd. • DILA (nonwoven fabric): DILA (registered trademark), a polyester nonwoven fabric manufactured by Unitika Ltd. • Dira crushed fiber: Fiber produced by Unitika Ltd. from crushed Dira®, a polyester nonwoven fabric. • Alumina: Alumina powder manufactured by Kishida Chemical Co., Ltd.

[0053] [Table 2]

[0054] The melting points of samples B1 to B13 were measured in the same manner as in Example 1. Furthermore, the degree of supercooling was measured as follows.

[0055] (Measurement of supercooling) The supercooling temperature was measured by observing the change in surface temperature of a sample placed in a constant temperature bath using a resistance thermometer. The degree of supercooling was calculated by subtracting the supercooling temperature from the melting point.

[0056] The results are shown in Table 2 and Figure 2. Figure 2 is a graph showing the degree of supercooling.

[0057] [Examples 24-46] (Preparation of heat storage material composition) First, the main component mixture of Example 2 (Sample No. A14) was prepared. In addition, strontium hydroxide Sr(OH)2 (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) was prepared as a supercooling inhibitor. Next, heat storage material compositions were prepared by mixing 100 parts by mass of the main component mixture of sample No. A14, Sr(OH)2, and, if necessary, a supercooling suppression additive, in the proportions shown in Table 3 (samples No. C1 to C23).

[0058] The supercooling suppression additives shown in Table 3 are as follows: • Octadecane: Manufactured by Fujifilm Wako Pure Chemical Corporation • Rayon: Manufactured by Unitika Ltd., fiber diameter 1 mm, fiber length 10 mm • Diatomaceous earth: Manufactured by Fujifilm Wako Pure Chemical Industries, Ltd., average particle size 50 μm • Bromooctadecane: Manufactured by Kishida Chemical Co., Ltd. • 1-Propanol: Manufactured by Kishida Chemical Co., Ltd. • Alumina: Alumina powder manufactured by Kishida Chemical Co., Ltd. • DILA (nonwoven fabric): DILA (registered trademark), a polyester nonwoven fabric manufactured by Unitika Ltd. • 2-Propanol: Manufactured by Kishida Chemical Co., Ltd. Glycerin: Manufactured by Kishida Chemical Co., Ltd. • Monododecyl sodium phosphate: Manufactured by Tokyo Chemical Industry Co., Ltd. • MgCl2: Magnesium chloride manufactured by Kishida Chemical Co., Ltd.

[0059] [Table 3]

[0060] For samples No. C1 to C23, the melting point and degree of supercooling were measured in the same manner as in Example 24. The results are shown in Table 3 and Figure 3. Figure 3 is a graph showing the degree of supercooling.

[0061] Table 2 shows that when 1% strontium hydroxide octahydrate (Sr(OH)2·8H2O) is added to the heat storage material composition, the degree of supercooling is 2.1°C. Furthermore, when each additive is added to the heat storage material composition in combination with strontium hydroxide octahydrate, the degree of supercooling is found to be between 0.9 and 2.2°C. In particular, when 0.5% octadecane and 1.0 part by mass of strontium hydroxide octahydrate are added to the heat storage material composition in combination, the degree of supercooling is found to be 0.9°C.

[0062] Table 3 shows that when 1% strontium hydroxide (Sr(OH)2) is added to the heat storage material composition, the degree of supercooling is 2.5°C. Furthermore, when each additive is added to the heat storage material composition in combination with strontium hydroxide, the degree of supercooling is found to be between 1 and 3.9°C.

[0063] Although this embodiment has been described above, this embodiment is not limited to these, and various modifications are possible within the scope of the gist of this embodiment.

Claims

1. Anhydrous calcium chloride and Ammonium chloride and, It contains a main ingredient mixture consisting of water, A heat storage material composition in which, when the content of anhydrous calcium chloride in 100% by mass of the main component mixture is CA by mass%, the content of ammonium chloride is NH by mass%, and the content of water is W by mass%, the parameters X and Y defined by the following formulas (P1) and (P2) satisfy the following formulas (1) to (5). [Mathematics 1] X=100×CA / (CA+W) (P1) [Mathematics 2] Y=100×NH / (CA+NH+W) (P2) [Mathematics 3] X-51.75>0 (1) [Math 4] 52.75-X>0 (2) [Math 5] 4.25-Y>0 (3) [Math 6] 1.2245X+Y-66.367>0 (4) [Number 7] -2.1569X+Y+110.27>0 (5)

2. The heat storage material composition according to claim 1, wherein the melting point is 27°C or lower, and the latent heat of fusion at 25°C to 28°C is 165 J / g or higher.

3. The aforementioned main component mixture is 100% by mass, The aforementioned anhydrous calcium chloride is 45.0 to 55.0% by mass, The ammonium chloride is 1.0 to 5.0% by mass, The heat storage material composition according to claim 1 or 2, comprising 43.0 to 50.0% by mass of the water.

4. The heat storage material composition according to claim 1 or 2, further comprising at least one supercooling inhibitor selected from the group consisting of strontium chloride hexahydrate, strontium hydroxide octahydrate, barium hydroxide octahydrate, strontium chloride, strontium hydroxide, barium hydroxide, calcium hydroxide, aluminum hydroxide, graphite, aluminum, titanium dioxide, hectorite, smectite clay, bentonite, laponite, propylene glycol, ethylene glycol, glycerin, ethylenediaminetetraacetic acid, sodium alkyl sulfate, sodium alkyl phosphate, potassium alkyl sulfate, and potassium alkyl phosphate.

5. The heat storage material composition according to claim 1 or 2, further comprising at least one thickener selected from the group consisting of sodium silicate, water glass, polyacrylic acid, sodium polyacrylate, polycarboxylate polyether polymer, sodium acrylic acid / maleic acid copolymer, sodium acrylic acid / sulfonic acid monomer copolymer, acrylamide / dimethylaminoethyl methacrylate dimethyl sulfate copolymer, acrylamide / sodium acrylate copolymer, polyethylene glycol, polypropylene glycol, superabsorbent polymer (SAP), carboxymethylcellulose (CMC), derivatives of CMC, carrageenan, carrageenan derivatives, xanthan gum, xanthan gum derivatives, pectin, pectin derivatives, starch, starch derivatives, konjac, agar, layered silicate, and composites thereof.

6. The heat storage material composition according to claim 1 or 2, further comprising at least one melting point depressant selected from the group consisting of sodium chloride, potassium chloride, sodium nitrate, sodium bromide, ammonium chloride, ammonium bromide, ammonium sulfate, ammonium nitrate, ammonium phosphate, and urea.

7. The heat storage material composition according to claim 4, wherein the supercooling inhibitor is strontium hydroxide octahydrate or strontium hydroxide.

8. The heat storage material composition according to claim 7, comprising 100 parts by mass of the main component mixture and 0.3 to 1.1 parts by mass of the strontium hydroxide hepthydrate or strontium hydroxide.

9. The heat storage material composition according to claim 4, further comprising a supercooling suppression additive.

10. The supercooling inhibitor is strontium hydroxide octahydrate. The heat storage material composition according to claim 9, wherein the supercooling suppression additive is one or more substances selected from the group consisting of decanoic acid, rayon, octadecane, sodium monododecyl phosphate, 1-propanol, polyester nonwoven fabric, polyester fiber, and alumina.

11. The heat storage material composition according to claim 10, comprising 100 parts by mass of the main component mixture, 0.3 to 1.1 parts by mass of the strontium hydroxide octahydrate, and 0.4 to 1.1 parts by mass of the supercooling suppression additive.

12. The supercooling inhibitor is strontium hydroxide, The heat storage material composition according to claim 9, wherein the supercooling suppression additive is one or more substances selected from the group consisting of octadecane, rayon, diatomaceous earth, bromooctadecane, 1-propanol, alumina, polyester nonwoven fabric, 2-propanol, glycerin, and monododecyl sodium phosphate.

13. The heat storage material composition according to claim 12, comprising 100 parts by mass of the main component mixture, 0.3 to 1.1 parts by mass of the strontium hydroxide, and 0.05 to 3.1 parts by mass of the supercooling suppression additive.

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