JP2912944B2 - Cold storage heat storage medium composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a regenerative heat storage medium composition, and more particularly to a composition containing 5 to 60% by weight of at least one salt of lauric acid.
A saccharide such as sucrose was mixed as a phase transition temperature regulator for increasing the temperature (phase transition temperature) at which the composition undergoes a phase transition from a liquid phase to a solid phase (including a semi-solid state). The present invention relates to a cold storage heat storage medium composition and a cold storage heat storage medium composition in which an alcohol such as ethanol is mixed at a ratio of 5 to 20% by weight as a phase transition temperature regulator for lowering the phase transition temperature.

[0002]

2. Description of the Related Art Conventionally, as a regenerative heat storage system using a regenerative heat storage medium, a sensible heat regenerative heat storage system that uses the ingress and egress of sensible heat and a latent heat regenerative heat storage system that uses the ingress and egress of latent heat due to a phase transition of a substance are known. Are known.

[0003] The regenerative heat storage medium generally used in the sensible heat regenerative heat storage method has a large specific heat, is easily available, and is excellent in safety.

[0004] On the other hand, as a latent heat regenerative heat storage system, a liquid phase
A method that utilizes the heat of vaporization accompanying the phase transition between gas phases
There is a method that uses the heat of fusion accompanying the phase transition of the liquid phase,
In general, since the volume change is small and the handling is relatively easy, and a considerable amount of heat can be stored and stored, the latent heat storage and storage method using the heat of fusion accompanying the phase transition between the solid and liquid phases has been used. I have. That is, a substance is melted to accumulate heat and then condensed (crystallized) to release heat, or a substance is solidified (crystallized) to release heat and conversely melted to absorb heat. It is a method.

[0005] As latent heat storage heat storage agent used in the latent heat storage heat storage system, typified by C ₁₄ typified in paraffin and C ₁₆ paraffins n- paraffinic compounds, and high-density polyethylene and cross-linked high density polyethylene derivatives of n- _{paraffins, Na 2 SO 4 · 10H 2} O
Or CaCl ₂ .6H ₂ O or NaCH ₃ COO.
Salt hydrate represented by 3H ₂ O, etc., (C ₄ H ₉ ) ₄ NC
HO ₂ .32H ₂ O or (C ₄ H ₉ ) ₄ NCH ₃ CO ₂ .32H ₂
Inclusion compounds typified by O or SO ₂ .6H ₂ O are known.

[0006] The melting point and heat of fusion of n-paraffin increase with the number of carbon atoms. Recently, a cross-linked high-density polyethylene having the same thermal properties as high-density polyethylene, maintaining its shape even after its melting point and causing no mutual fusion has been obtained.

[0007]

However, in the conventional sensible heat storage / storage system, there is a problem that continuous heat storage or heat dissipation cannot be performed at a desired constant temperature. Of the methods that use the heat of vaporization accompanying the liquid / gas phase transition,
There was a problem that the volume change between gas phases was extremely large and it was difficult to handle.

Next, salt hydrates are superior to paraffinic compounds in terms of heat of fusion per unit volume, specific heat, and heat conduction, but exhibit a supercooling phenomenon to a greater or lesser extent and undergo phase separation. And phase separation prevent smooth extraction of latent heat,
In addition, there is a disadvantage that the amount of heat storage is gradually reduced, and there is a problem that the clathrate compound also shows a supercooling phenomenon.

It has been known that, for example, glucose, sucrose, or glycerin is useful as a clearing agent for making an opaque detergent transparent.
These clarifying agents have an effect of increasing a temperature or a temperature range (hereinafter, referred to as a phase transition temperature) when a phase transition from a liquid (liquid phase) to a solid (including a semi-solid state, a solid phase) is performed;
And it is not known that alcohols such as ethanol have an effect of lowering the phase transition temperature.

[0010] The term "semi-solid" is defined as a solid state in which fluidity is lost, including a state called a gel state or a jelly state. The term “phase transition temperature regulator” refers to a reversible heat storage medium composition containing a higher fatty acid salt as a main component, which reversibly undergoes a phase transition from a liquid phase (liquid) to a solid phase (semi-solid or solid). The temperature or the temperature range at the time of raising or lowering, a group of compounds or mixed compositions capable of appropriately changing this phase transition temperature within a certain temperature range,
Define.

An object of the present invention is to provide a regenerative heat storage medium composition that is harder to warm than water and harder to cool than water, and is based on a phase transition between a solid phase and a liquid phase at a plurality of predetermined temperatures. It is yet another object of the present invention to develop a cold storage medium composition that can store and release latent heat.

[0012]

Means for Solving the Problems First, when sucrose is added to a sodium laurate solution, the phase transition temperature of the sodium laurate is increased, and the amount of sucrose added and the phase transition temperature are increased. Was found to have a positive dose-response relationship with the degree of increase in the temperature, and then the addition of ethanol to the sodium laurate solution lowered the phase transition temperature of the composition, and furthermore, the amount of ethanol added It has been found that there is a positive dose-response correlation between the transition temperature and the degree of decrease. That is, sucrose or ethanol substantially increases the phase transition temperature of the sodium laurate solution,
It has the effect of lowering the phase transition temperature regulator, and furthermore, it has been found that heat storage or heat radiation can be performed around the predetermined temperature at which the phase transition between the solid phase and the liquid phase of the sodium laurate solution occurs. The invention has been completed.

That is, the invention of claim 1 provides a composition comprising a composition containing 5 to 60% by weight of at least one salt of lauric acid, wherein the composition is converted from a liquid phase to a solid phase (semi-solid). A cold storage heat storage medium composition obtained by mixing a phase transition temperature regulator for raising the temperature (phase transition temperature) at the time of phase transition to 5 to 20% by weight. The cold storage / heat storage medium composition characterized in that “the transition temperature regulator is a saccharide”. The invention of claim 2, wherein the salt of lauric acid is either potassium laurate or sodium laurate or Claim 1 characterized in that it is both.
Each of the described cold storage heat storage medium compositions has its contents.

According to a third aspect of the present invention, there is provided a method according to claim 1, wherein the saccharide is dihydroxyacetone, glyceraldehyde, glycerin, erythrose, erythrulose, ribose, ribulose,
Monosaccharides and derivatives thereof such as xylose, deoxyribose, glucose, galactose, mannose, fructose, glucosamine, galactosamine, methoxyglucose, sorbitol, or sedoheptulose; disaccharides such as maltose, isomaltose, sucrose or lactose; A derivative thereof, or any one or a mixture of two or more saccharides composed of oligosaccharides such as triomaltose or maltoheptulose. " The content of the cold storage / heat storage medium composition described above is included.

[0015] The invention of claim 4 is that the phase transition temperature regulator comprises at least one kind of the saccharide and a higher fatty acid having 8 to 24 carbon atoms excluding lauric acid,
It is a mixture of one or more selected from alkali metal salts such as potassium salts and sodium salts, ammonium salts, monoethanolamine salts, diethanolamine salts, and triethanolamine salts. "
A cold storage heat storage medium composition according to any one of claims 1 to 3, characterized in that:

[0016] The invention of claim 5 is that the composition containing from 5% to 60% by weight of at least one salt of lauric acid is converted from a liquid phase to a solid phase (including a semi-solid state). A) a cold storage heat storage medium composition comprising a phase transition temperature regulator for lowering the temperature (phase transition temperature) at the time of phase transition to 5 to 20% by weight; modifier, methanol, ethanol, propanol, isopropanol, polyethylene glycol, any one selected from propylene glycol such <br/> any alcohol or 2
A heat storage medium composition characterized in that it is a mixture of two or more species, the invention of claim 6, wherein the salt of lauric acid is one or both of potassium laurate and sodium laurate. The cold storage / heat storage medium composition according to claim 7 is characterized in that it has the respective contents.

[0017] The invention according to claim 7 is a method according to any one of claims 1 to 6, wherein at least one additive of a preservative / disinfectant, a coloring agent, or a fluorescent agent is blended with the cold storage heat storage medium composition. The described cold storage / heat storage medium composition ".

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION The cold storage heat storage medium composition of the present invention comprises:
A predetermined amount of commercially available sodium laurate, for example, is added to deionized distilled water, warmed to about 80 ° C., dissolved with gentle stirring, and then a predetermined amount of, for example, sucrose is added as the phase transition temperature regulator. After dissolution, the final concentration may be adjusted by adding deionized distilled water, and the adjustment can be made very easily without requiring special equipment and devices.

The regenerative heat storage medium composition of the present invention is prepared by adding a predetermined amount of a predetermined amount of, for example, lauric acid to deionized distilled water, warming the solution to about 80 ° C., dissolving the solution, and gently stirring the aqueous solution of sodium hydroxide ( (Preferably 50% by weight) is added dropwise to neutralize the same, and a predetermined amount of, for example, sucrose is added as the phase transition temperature regulator and dissolved, and then deionized distilled water is added. In addition, it can be adjusted by increasing the total amount to a predetermined amount.

In the cold storage heat storage medium composition of the present invention, a saccharide containing 5 to 60% by weight of a saccharide is contained in a solution containing at least one of lauric acid salts in a ratio of 5 to 60% by weight. The chilled heat storage medium composition that is mixed is added with saccharide as a phase transition temperature regulator to raise the temperature (phase transition temperature) at which the phase transition from a liquid phase to a solid phase (including a semi-solid state) occurs. As the salt of lauric acid, a metal salt of lauric acid such as an alkali metal salt of lauric acid typified by potassium laurate or sodium laurate or an alkali metal salt typified by calcium laurate Lauric acid represented by ammonium laurate, or monoethanolamine laurate, diethanolamine laurate or ditriethanolamine laurate Salts may be exemplified, and these may be used alone or as a mixture of two or more, but potassium laurate, sodium laurate, ammonium laurate, or monoethanolamine laurate are preferred, and particularly preferred are Is potassium laurate alone.

The saccharides include dihydroxyacetone, glyceraldehyde, glycerin, erythrose, erythrulose, ribose, ribulose, xylose, deoxyribose, glucose, galactose, mannose, fructose, glucosamine, galactosamine, methoxyglucose, sorbitol Or monosaccharides and derivatives thereof such as sedoheptulose and the like, disaccharides and derivatives thereof such as maltose, isomaltose, sucrose and lactose, and oligosaccharides such as triomaltose and maltoheptulose, and the like. These may be used alone or as a mixture of two or more. However, the use of sucrose alone is preferred because the adjustable phase transition temperature range is the widest.

In the regenerative heat storage medium composition of the present invention, a solution containing at least one of lauric acid salts at a ratio of 5 to 60% by weight contains an alcohol at a ratio of 5 to 20% by weight. The cold storage medium composition that is mixed is added with alcohols as a phase transition temperature regulator for lowering the temperature (phase transition temperature) at the time of phase transition from a liquid phase to a solid phase (including a semi-solid state). And the alcohol includes:
Methanol, ethanol, propanol, isopropanol, polyethylene glycol, propylene glycol
Do etc. can be exemplified, thereof may be used alone or in mixture of two or more, but ethanol, polyethylene glycol, or propylene glycol are preferred, single use of propylene glycol, adjustable phase transition temperature range broadest Is most preferred.

The fatty acid salts used in the following examples,
Compounds such as carbohydrates and alcohols are all commercially available reagents and are the results of studies using deionized distilled water.

The data relating to the phase transition temperature of a typical embodiment of the regenerative heat storage medium composition according to the present invention to which a saccharide is added as the above-mentioned phase transition temperature regulator are shown as those for which the phase transition temperature regulator is not added. Table 1 or Table 2 below shows the data together with the data relating to the temperature (Comparative Example).

The phase transition temperature of the heat storage medium composition is as follows:
It was measured according to the freezing point measurement method described in JIS K8001.

Table 1 shows the phase transition temperatures of the cold energy storage medium compositions prepared by blending typical commercially available saccharides with the cold energy storage medium composition containing sodium laurate as the main component adjusted to each concentration. . (Below)

[0027]

[Table 1] No. Thermal storage medium composition Carbohydrate Phase transition temperature 1 Sodium laurate (5%)-29-32 ° C 2 Sodium laurate (10%)-33-35 ° C 3 Sodium laurate (20%)-39-41 ℃ 4 Sodium laurate (20%) xylose (5%) 38-39 ℃ 5 Sodium laurate (20%) xylose (10%) 39-41 ℃ 6 Sodium laurate (20%) xylose (20%) 41- 42 ° C 7 Sodium laurate (20%) Fructose (5%) 37-39 ° C 8 Sodium laurate (20%) Fructose (10%) 39-41 ° C 9 Sodium laurate (20%) Fructose (20%) 40 ~ 42 ° C 10 Sodium laurate (20%) Maltose (5%) 38-40 ° C 11 Sodium laurate (20%) Maltose (10%) 39-41 ° C 12 Sodium laurate (20%) Maltose (20%) 42-43 ° C 13 Sodium laurate (20%) Sucrose (5%) 41-42 ° C 14 Sodium laurate (20%) Sucrose (10%) 42-44 ℃ 15 Sodium laurate (20%) sucrose (20%) 45-47 ℃

In the table, “20 ° C. or less” means that the temperature or temperature range at which the cold storage heat storage medium composition or the cold storage heat storage medium composition undergoes a phase transition to a solid phase is 20 ° C. or less, in other words. Indicates that the phase does not change to a solid at least at 20 ° C. or higher, and “60 ° C. or higher” means the temperature or temperature range at which the cold storage heat storage medium composition or the cold storage heat storage medium composition undergoes phase transition to a solid phase. Is 60 ° C. or higher, in other words, the cold storage heat storage medium composition or the cold storage heat storage medium composition is a solid that belongs to a solid phase at least at 60 ° C. or lower. Hereinafter, the same applies to Table 2.

The results in Table 1 will be described.
No. In view of the results of 3 to 9, the phase transition temperature of the regenerative heat storage medium composition containing 20% by weight of sodium laurate as a main component is about 5 ° C. when an aldpentose such as xylose and a ketohexose such as fructose are blended. It can be seen that the temperature rises within the temperature range described above and with a positive dose-response correlation.

Further, No. From the results of Examples 3 and 10 to 15, the phase transition temperature shows a positive dose-response correlation within a temperature range of about 5 ° C. as described above even when a disaccharide such as maltose or sucrose is added. It can be seen that it rises with

Next, there are trisaccharides, tetrasaccharides, other pentasaccharides, other hexamonosaccharides, or heptasaccharides, which are easily available, and monosaccharides called aldoses having an aldehyde group at the terminal, or these. Or a monosaccharide called ketose having a ketone group at its terminal and derivatives thereof, other disaccharides or oligosaccharides, more specifically, dihydroxyacetone, glyceraldehyde , glycerin (more than trisaccharide), erythrose And erythrulose (more than four monosaccharides),
Ribose, ribulose, deoxyribose (above pentasaccharide), glucose, galactose, mannose, glucosamine, galactosamine, methoxyglucose (above hexamonosaccharide), sedoheptulose (heptasaccharide), triomaltose, maltoheptulose (trisaccharide) And sorbitol .

Although no results are shown, it was found that all of them have the same effect of increasing the phase transition temperature as described above, but the degree of the increasing effect depends on the molecular species of the carbohydrate compounded. , And their combinations or compounding ratios.

Although the mechanism of the action of increasing the phase transition temperature of these carbohydrates as described above is unknown at present, xylose (monosaccharide) and maltose (disaccharide) may be added to the cold storage medium. ) At the same weight percentage, there is no apparent difference in the effect of increasing the phase transition temperature and no coherence is exhibited. If the phase transition temperature is regarded as the melting point, the melting point increases. In view of the effect, it is considered that at least the action called so-called melting point depression is an action effect based on a completely different action mechanism, and is a conventionally unknown action effect specific to carbohydrates.

In addition, the effect of increasing the phase transition temperature exhibited by fructose and sucrose, which are typical saccharides called so-called non-reducing sugars, and the above-mentioned phase produced by saccharides called so-called reducing sugars Considering that the effect of increasing the transition temperature is almost the same, the effect of increasing the phase transition temperature is considered to be unrelated to the reducing effect of each carbohydrate.

Although the results are not shown, the above-mentioned heat storage medium composition obtained by blending each of the above-mentioned carbohydrate molecules or a mixture thereof with the heat storage medium composition containing 40% by weight of potassium laurate as a main component. Were all 20 ° C. or lower or 60 ° C. or higher.

As mentioned above, metal salts of lauric acid,
In particular, the cold storage heat storage medium composition containing sodium laurate as a main component is an aqueous solution, and if an appropriate amount of saccharide is added, the phase transition temperature of the cold storage heat storage medium composition can be increased. For example, it can be stored or stored without leaking from the bag, and can be used repeatedly.

Next, Table 2 shows a cold storage heat storage medium composition in which a representative alcohol is blended with a cold storage heat storage medium composition containing, as a main component, either potassium laurate or sodium laurate adjusted to each concentration. Shows the phase transition temperature of

The phase transition temperature of the heat storage medium composition is as follows:
It was measured according to the freezing point measurement method described in JIS K8001. (Below)

[0039]

[Table 2] No. Thermal storage medium composition Alcohol Phase transition temperature 16 Potassium laurate (5%)-20 ° C or less 17 Potassium laurate (10%)-20 ° C or less 18 Potassium laurate (20%)-20 ° C or less 19 Lauric acid Potassium (30%)-20 ° C or less 20 Potassium laurate (40%)-60 ° C or more 21 Potassium laurate (50%)-60 ° C or more 22 Potassium laurate (60%)-60 ° C or more 23 Potassium laurate ( 40%) Ethanol (5%) 60 ° C or higher 24 Potassium laurate (40%) Ethanol (10%) 60 ° C or higher 25 Potassium laurate (40%) Ethanol (20%) 33-35 ° C 26 Sodium laurate (20 %) Ethanol (5%) 30 to 32 ° C 27 Sodium laurate (20%) Ethanol (10%) 20 ° C or less 28 Sodium laurate (20%) Ethanol (20%) 20 ° C or less 29 Sodium laurate (40% ) Perylene glycol (5%) 34-36 ° C 30 Sodium laurate (4 (0%) Perfluoropolycol (10%) 31-33 ° C 31 Sodium laurate (40%) Perfluoropolychol (20%) 28-30 ° C

No. From the results of 18 and 23-25,
At a phase transition temperature of the cold energy storage medium composition containing 40% by weight of potassium laurate as a main component, when the cold energy storage medium composition is mixed with ethanol at a ratio of 10 to 20% by weight, a temperature of 30 ° C to at least 60 ° C is obtained. It can be seen that it falls within a range and with a positive dose-response correlation.

That is, the regenerative heat storage medium composition containing 40% by weight of potassium laurate as a main component is mixed with ethanol in an amount of 10 to 20% by weight.
Cooling the heat storage medium composition to at least 60 ° C to about 30 ° C;
To a cold storage heat storage medium composition that undergoes a phase transition within the above temperature range.

In addition, No. In view of the results of Nos. 3 and 26 to 28, at a phase transition temperature of the cold storage heat storage medium composition containing 20% by weight of sodium laurate as a main component, when the cold storage heat storage medium composition is mixed with ethanol at a ratio of 5% by weight, It is found that the temperature drops by about 10 ° C. from the phase transition temperature (39-41 ° C.) of the cold storage heat storage medium composition when ethanol is not blended. It was found to descend.

That is, by blending ethanol at a ratio of less than 10% by weight to a cold storage medium containing 40% by weight of sodium laurate as a main component, the cold storage medium can be heated from about 40 ° C. to at least 20% by weight. It can be improved to a cold storage medium composition that undergoes a phase transition within the temperature range of ° C.

Furthermore, No. 3 and 29-31, at the phase transition temperature of the cold storage medium containing 20% by weight of sodium laurate as a main component, 20% by weight of propylene glycol was added to the cold storage medium.
When the propylene glycol is not blended, the phase transition temperature (39 to 4) of the cold storage heat storage medium composition when propylene glycol is not blended.
1 ° C.), and a drop with a positive dose-response correlation.

That is, by blending propylene glycol in a proportion of less than 20% by weight with the regenerative heat storage medium composition containing 20% by weight of sodium laurate as a main component, the regenerative heat storage medium composition can be heated from about 40 ° C. to at least 40 ° C. It is clear that the composition can be improved to a regenerative heat storage medium composition that undergoes a phase transition in a temperature range of 30 ° C.

Further, methanol, propanol,
Isopropanol, was examined polyethylene glycol soil readily other alcohol available, but not shown the results, in any case, the same phase transition temperature lowering effect as described above was observed, the extent of compounding It varied remarkably depending on the types and combinations of the alcohols used and the mixing ratio of these alcohols.

With respect to the mechanism of action of the alcohol relating to the above-mentioned effect of lowering the phase transition temperature, it can be inferred that one factor is an increase in the solubility of lauric acid or a salt of lauric acid, but the details are clear. is not.

Next, an antiseptic / bactericide can be added to each of the above-mentioned compositions. Examples of the antiseptic / bactericide include benzoic acid and salts thereof, edetic acid and salts thereof, chloramine T, salicylic acid and salts thereof. , Dibutylhydroxytoluene, sorbic acid and its salts, triclosan, trichlorocarbanilide, paraaminobenzoic acid ester, paraoxybenzoic acid ester, phenoxyethanol, methylchloroisothiazoline, oxybenzone, dehydroacetic acid and salts thereof.

Further, one or both of a colorant and a fragrance may be added to each of the above-mentioned cleaning compositions. Examples of the colorant include known tar dyes and natural dyes. The flavoring agent includes a synthetic flavor component and a natural flavor component. When these coloring agents or fragrances are dissolved in an alcohol-based solvent such as ethanol, for example, the alcohol-based solvent may act as the phase transition regulator,
Special care must be taken during the addition.

Next, in the above-mentioned embodiment No. 15 and no. 2
Each 500 ml of the cold storage heat storage medium composition described in No. 6 was placed in a 8.5 cm diameter tall beaker, and then each of the tall beakers was precooled to 0 ° C. Then, a thermometer for measuring the temperature change of the central part of the cold storage heat storage medium composition over time was set, and the tall beaker was placed in a 5 ° C. constant temperature water bath and allowed to stand. 500 ml of water as a comparative example
The same operation was performed using. The result is shown in FIG.

From FIG. 1, in the case of water used as a comparative example, the temperature was observed to rise with time with heating, and after 25 minutes, the temperature reached 5 ° C. which was the same as the outside temperature.
o. The regenerative heat storage medium composition of No. 15 required about 25 minutes for the temperature to reach 4 ° C. with heating as in the case of water, and showed a curve in which the temperature increased with time during this time. Although a curve in which the temperature increased with time was observed, the time required for equilibrium with the outside temperature (5 ° C.) was about 40 minutes, and it was found that it was clearly harder to warm than water.

Next, in Example No. In the case of the regenerative heat storage medium composition of No. 26, it takes 45 to 50 minutes for the temperature to reach 4 ° C. with heating, as in the case of water, and shows a curve in which the temperature increases with time. However, it was found that the temperature gradually increased for 25 minutes from 45 to 50 minutes to 70 minutes, and it took about 70 minutes to equilibrate with the outside temperature (5 ° C.).

Next, in Example No. 15 and no. 26. Each 500 ml of the cold storage heat storage medium composition described in 26.
After placing in a 5 cm tall beaker, each of the tall beakers was preheated to 60 ° C. Next, the tall beaker was placed in a constant temperature water bath at 40 ° C., and the temperature change at the center of the cold storage heat storage medium composition was measured over time by the same operation as above. The result is shown in FIG.

As shown in FIG. 2, in the case of water used as a comparative example, the temperature dropped with time with cooling, and it was found that the temperature was about 30%.
After 40 minutes, the temperature reached 40 ° C., which is the same as the outside temperature. The cold storage heat storage medium composition described in 26 is a comparative example (water)
As in the case of the above, a curve in which the temperature decreases with time until about 15 minutes passed was recognized, but the temperature drop was slow for 30 minutes from 15 to 45 minutes, and finally it took 45 minutes to reach the outside and It was cooled to the same 40 ° C. and found to equilibrate.

Next, in Example No. In the regenerative heat storage medium composition of No. 15, a curve in which the temperature gradually decreased over time until about 15 minutes passed compared with the comparative example (water) was recognized, but the temperature change was not changed for about 25 minutes to 35 minutes for 10 minutes. The temperature was constant at about 45 ° C. without being recognized, and finally, it took 80 minutes to cool down to 40 ° C., which is the same as that of the outside, and was found to be in equilibrium.

That is, from FIG. 2, it can be seen from FIG. 2 that each of the regenerative heat storage medium compositions of the present invention has an apparent specific heat of 1 which is harder to cool than water.
It is clear that the composition is the above composition, and furthermore, Example N which undergoes a phase transition between a solid phase and a liquid phase at 45 to 47 ° C.
o. The thermal storage medium composition of No. 15 releases heat energy (latent heat) stored inside the thermal storage medium composition near the phase transition temperature between the solid phase and the liquid phase. It was found that the temperature of the object did not change.

The above-mentioned cold storage / heat storage medium composition of the present invention can contain known additives such as a preservative / disinfectant, a coloring agent, or a fluorescent agent.

Among these additives, only the preservatives and bactericides as representative additives will be described in more detail.
Preservatives and bactericides that can be used for this purpose include benzoic acid and its salts, edetic acid and its salts, chloramine T,
Salicylic acid and its salts, dibutylhydroxytoluene, sorbic acid and its salts, triclosan, trichlorocarbanilide, paraaminobenzoate, paraoxybenzoate, phenoxyethanol, methylchloroisothiazoline, oxybenzone, or dehydroacetic acid and salts thereof.

The representative embodiments of the present invention have been described above, but the present invention is not limited by these embodiments unless the gist of the present invention is exceeded.

[0060]

EFFECTS OF THE INVENTION The regenerative heat storage medium composition of the present invention comprises a lauric acid salt as a main component, a phase transition temperature regulator such as glucose, sucrose or glycerin for increasing a phase transition temperature, or a phase transition temperature. Since it is a composition having a phase transition temperature regulator such as ethanol as a component thereof and an aqueous solution, it is completely decomposed by hydrolysis or biodegradation by microorganisms in soil when left in nature. It does not cause environmental destruction, etc. and is excellent in safety. Further, it can be stored or stored without leaking from, for example, a packing body as in the related art, and can be used repeatedly.

In the cold storage heat storage medium composition of the present invention, for example, a cold storage heat storage medium containing sodium laurate as a main component by blending a phase transition temperature regulator for a saccharide such as glucose, sucrose or glycerin. The phase transition temperature of the composition can be improved to a cold storage medium composition that undergoes a phase transition within a temperature range of about 5 ° C. and with a positive dose-response relationship, and for example, an amount of ethanol of 10% ~
By blending in the range of 20% by weight, for example, a cold storage medium composition mainly composed of 40% by weight of potassium laurate has a positive dose-response relationship at least within a temperature range of 60 ° C to about 30 ° C. The heat storage medium composition of the present invention can be improved into a cold storage heat storage medium composition that undergoes a phase transition, and the cold storage heat storage medium composition of the present invention is harder to warm and cool than water. Can be used as

The heat storage medium composition of the present invention can store or release external heat energy as latent heat at a phase transition temperature at which a phase transition between a solid phase and a liquid phase occurs. The heat storage medium composition can be used as a cold storage heat storage medium of a sensible heat storage and storage method utilizing latent heat, which functions effectively near the phase transition temperature of the heat storage medium composition.

Therefore, in the cold storage heat storage medium composition of the present invention, the cold storage heat storage effect of sensible heat larger than water and the cold storage heat storage effect of latent heat can function synergistically.
The cold storage heat storage capacity is extremely efficient, and there is no need to change the components of the cold storage heat storage medium composition for each desired temperature, so that the workability of preparing the cold storage heat storage medium composition and the cost can be reduced.

Further, by appropriately selecting from the cold storage heat storage medium composition of the present invention, it is possible to provide a cold storage heat storage medium composition that can safely and reliably keep or cool at a desired arbitrary temperature.

[Brief description of the drawings]

FIG. 1 is a graph showing a time-dependent change in temperature of a pre-cooled heat storage medium composition of the present invention when the composition is left standing in a constant temperature atmosphere and heated.

FIG. 2 is a graph showing a time-dependent temperature change of the preheated regenerative heat storage medium composition of the present invention when the regenerative heat storage medium composition is left standing in a constant temperature atmosphere and cooled.

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁶ , DB name) C09K 5/06 CA (STN) WPI / L (QUESTEL)

Claims (7)

(57) [Claims] 1. When the composition undergoes a phase transition from a liquid phase to a solid phase (including a semi-solid state) to a composition containing 5 to 60% by weight of any one or more salts of lauric acid. A phase transition temperature regulator for raising the temperature (phase transition temperature) of
A cold storage heat storage medium composition mixed at a ratio of 20% by weight, wherein the phase transition temperature regulator is a saccharide. 2. The regenerative heat storage medium composition according to claim 1, wherein the salt of lauric acid is one or both of potassium laurate and sodium laurate. 3. The carbohydrate is dihydroxyacetone, glyceraldehyde, glycerin, erythrose, erythrulose, ribose, ribulose, xylose, deoxyribose, glucose, galactose, mannose,
Monosaccharides and derivatives thereof such as fructose, glucosamine, galactosamine, methoxyglucose, sorbitol, or sedoheptulose, maltose,
Any one or a mixture of two or more selected from disaccharides such as isomaltose, sucrose or lactose and derivatives thereof and oligosaccharides such as triomaltose and maltoheptulose. The cold storage heat storage medium composition according to claim 1, wherein: 4. The method according to claim 1, wherein the phase transition temperature regulator comprises at least one of the above saccharides and at least 8 carbon atoms excluding lauric acid.
To 24 higher fatty acids, each of which is selected from alkali metal salts such as potassium salts and sodium salts, ammonium salts, monoethanolamine salts, diethanolamine salts, and triethanolamine salts. The cold storage heat storage medium composition according to any one of claims 1 to 3, which is a mixed mixture. 5. When the composition undergoes a phase transition from a liquid phase to a solid phase (including a semi-solid state) to a composition containing 5 to 60% by weight of any one or more salts of lauric acid. A phase transition temperature regulator for lowering the temperature (phase transition temperature) of
A cold-storage heat storage medium composition obtained by mixing a proportion of 20% by weight, said phase transition temperature modifier, chosen methanol, ethanol, propanol, isopropanol, polyethylene glycol, propylene glycol such what alcohol A cold storage heat storage medium composition, which is a mixture of any one or two or more kinds. 6. The regenerative heat storage medium composition according to claim 7, wherein the salt of lauric acid is one or both of potassium laurate and sodium laurate. 7. The cold storage heat storage medium composition according to claim 1, wherein the cold storage heat storage medium composition further comprises at least one additive selected from a preservative / bactericide, a coloring agent, and a fluorescent agent. Stuff.