JPS6142958B2 - - Google Patents
Info
- Publication number
- JPS6142958B2 JPS6142958B2 JP56137627A JP13762781A JPS6142958B2 JP S6142958 B2 JPS6142958 B2 JP S6142958B2 JP 56137627 A JP56137627 A JP 56137627A JP 13762781 A JP13762781 A JP 13762781A JP S6142958 B2 JPS6142958 B2 JP S6142958B2
- Authority
- JP
- Japan
- Prior art keywords
- heat storage
- cabr
- added
- sodium silicate
- supercooling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000005338 heat storage Methods 0.000 claims description 16
- 239000011232 storage material Substances 0.000 claims description 14
- 239000004115 Sodium Silicate Substances 0.000 claims description 7
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 7
- 239000002667 nucleating agent Substances 0.000 claims description 6
- 239000002562 thickening agent Substances 0.000 claims description 4
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 3
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 3
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 3
- NQMKEZBQFUTOQC-UHFFFAOYSA-L calcium;dibromide;hydrate Chemical compound O.[Ca+2].[Br-].[Br-] NQMKEZBQFUTOQC-UHFFFAOYSA-L 0.000 claims description 2
- 238000004781 supercooling Methods 0.000 description 7
- 230000008018 melting Effects 0.000 description 6
- 238000002844 melting Methods 0.000 description 6
- 239000011734 sodium Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000006911 nucleation Effects 0.000 description 3
- 238000010899 nucleation Methods 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 229910004806 Na2 SiO3.9H2 O Inorganic materials 0.000 description 1
- QSHXZNJVLUEIHK-UHFFFAOYSA-L calcium;dibromide;hexahydrate Chemical compound O.O.O.O.O.O.[Ca+2].[Br-].[Br-] QSHXZNJVLUEIHK-UHFFFAOYSA-L 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- -1 inorganic compound hydrates Chemical class 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- RXSHXLOMRZJCLB-UHFFFAOYSA-L strontium;diacetate Chemical compound [Sr+2].CC([O-])=O.CC([O-])=O RXSHXLOMRZJCLB-UHFFFAOYSA-L 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Description
【発明の詳細な説明】
(1) 発明の目的
過冷却を防止した蓄熱材を提供することを目的
とする。[Detailed description of the invention] (1) Object of the invention An object of the invention is to provide a heat storage material that prevents supercooling.
(2) 従来例
水や砕石などの顕熱を利用する顕熱型蓄熱材に
比べ、潜熱型蓄熱材は蓄熱容量が大きく、しか
も、温度一定のもとで熱の出入れができるなどの
利点がある。(2) Conventional example Compared to sensible heat storage materials that use the sensible heat of water, crushed stone, etc., latent heat storage materials have a larger heat storage capacity and have the advantage of being able to transfer heat in and out at a constant temperature. There is.
潜熱型蓄熱材としては、無機化合物の水和物が
考えられるが、無機化合物水和物には過冷却とい
う問題点がある。すなわち、溶融状態の無機水和
物を冷却して、融点以下の温度になつても、凝固
が起らないという現象である。凝固時に熱が放出
される訳であるから、過冷却になると熱放出がな
く、事実上、蓄熱材として使用できない。例え
ば、臭化カルシウム水和物〔CaBr2・6H2O〕は
融点は38℃であるが、容易に10℃付近まで過冷却
し、凝固点のバラツキも大きい。 Hydrates of inorganic compounds can be considered as latent heat type heat storage materials, but inorganic compound hydrates have the problem of supercooling. That is, this is a phenomenon in which solidification does not occur even when a molten inorganic hydrate is cooled to a temperature below its melting point. Since heat is released during solidification, there is no heat release when it becomes supercooled, and it is virtually impossible to use it as a heat storage material. For example, calcium bromide hydrate [CaBr 2 .6H 2 O] has a melting point of 38°C, but it is easily supercooled to around 10°C, and its freezing point varies widely.
(3) 発明の構成
本発明は、臭化カルシウム６水和物〔CaBr2・
6H2O〕に過冷却防止用の核剤としてケイ酸ナト
リウム（Na2SiO3〔無定形〕、Na2SiO3・9H2Oの
何れでもよい）を溶解度以上の量で加えてなる蓄
熱材を提供するものである。(3) Structure of the invention The present invention provides calcium bromide hexahydrate [CaBr 2 .
A heat storage material made by adding sodium silicate (Na 2 SiO 3 [amorphous], either Na 2 SiO 3 or 9H 2 O) to 6H 2 O] as a nucleating agent to prevent supercooling in an amount exceeding the solubility. It provides:
CaBr2・6H2Oは融点が38℃、潜熱が94cal/mlで
あり、蓄熱量も比較的大きく、融点も実際的な値
である。しかし、CaBr2・6H2Oだけでは過冷却
現象により、蓄熱材として事実上使用できない。
よつて、過冷却防止剤としてケイ酸ナトリウムを
溶解度以上に加えるのである。 CaBr 2 6H 2 O has a melting point of 38°C, a latent heat of 94 cal/ml, a relatively large amount of heat storage, and a practical melting point. However, CaBr 2 6H 2 O alone cannot be practically used as a heat storage material due to the supercooling phenomenon.
Therefore, sodium silicate is added as an anti-supercooling agent in an amount exceeding its solubility.
ケイ酸ナトリウムは溶解状態のCaBr2・6H2O
中においても固体のまゝ存在するわけであるが、
CaBr2・6H2Oが融点以下の温度に冷却される
と、これが核剤となつて、ここたりCaBr2・
6H2Oの結晶化が始まり、過冷却を防止する。す
なわち、CaBr2・6H2Oの結晶化は溶液、はい種
の生成、結晶核の生成、結晶成長の順に行われる
が結晶は核生成後に成長する。ケイ酸ナトリウム
はCaBr2・6H2Oの核生成を助け、また核と同じ
働きをするものと思われる。 Sodium silicate is dissolved CaBr 2 6H 2 O
Although it exists as a solid inside,
When CaBr 2 .6H 2 O is cooled to a temperature below its melting point, it becomes a nucleating agent and the CaBr 2 .
Crystallization of 6H 2 O begins, preventing supercooling. That is, crystallization of CaBr 2 .6H 2 O is performed in the following order: solution, generation of seeds, generation of crystal nuclei, and crystal growth, and the crystals grow after nucleation. Sodium silicate helps nucleation of CaBr 2 6H 2 O and seems to have the same function as the nucleation.
ケイ酸ナトリウムの添加量は溶解度以上あれば
よく、上限に制限はない。しかし、使用上は
10wt％以下の望ましい。なお、核剤を分散、固
定するための増粘剤、たとえばカルボキシルメチ
ルセルロースなどを添加してもよい。 The amount of sodium silicate added is not limited as long as it is equal to or higher than the solubility. However, in use
Desirably less than 10wt%. In addition, a thickener such as carboxymethyl cellulose may be added to disperse and fix the nucleating agent.
(4) 効果
本発明は、CaBr2・6H2Oを蓄熱材とし、これ
に核剤としてケイ酸ナトリウムを添加したので、
過冷却が防止され、安定した融点、凝固点の蓄熱
材を提供することができたのである。なお、酢酸
ストロンチウムは、CaBr2・6H2Oにほとんど溶
けないので、CaBr2・6H2Oの特性を損ねること
がないという特徴も有する。(4) Effects In the present invention, CaBr 2 6H 2 O is used as a heat storage material and sodium silicate is added as a nucleating agent.
Supercooling was prevented and a heat storage material with stable melting and freezing points could be provided. In addition, since strontium acetate hardly dissolves in CaBr 2 .6H 2 O, it also has the characteristic that it does not impair the properties of CaBr 2 .6H 2 O.
(5) 実施例
実施例 １
CaBr2・6H2OにNa2SiO3〔無定形〕を0.1wt％
添加して蓄熱材組成物を得た。(5) Examples Example 1 0.1wt% Na 2 SiO 3 [amorphous] in CaBr 2 6H 2 O
A heat storage material composition was obtained.
上記組成物をガラス容器に密封した。これを60
℃に加熱し、溶融させ、つぎに20℃の恒温槽中に
入れて冷却した。この加熱、冷却の熱サイクルを
50回くり返した。 The above composition was sealed in a glass container. This is 60
It was heated to 0.degree. C. to melt it, and then placed in a constant temperature bath at 20.degree. C. to cool it. This heating and cooling thermal cycle
Repeated 50 times.
実施例 ２
実施例１の組成物に、さらに増粘剤としてカル
ボキシルメチルセルロースを1wt％添加した。こ
れを実施例１と同じようにして試験した。結果も
実施例１と同様であつた。Example 2 To the composition of Example 1, 1 wt % of carboxymethyl cellulose was further added as a thickener. This was tested in the same manner as in Example 1. The results were also the same as in Example 1.
実施例 ３
実施例１の無定形Na2SiO3に代えて同量の
Na2SiO3・9H2Oを添加して実施例１と同様に試
験した。結果も実施例１と同様であつた。Example 3 In place of the amorphous Na 2 SiO 3 in Example 1, the same amount of
A test was conducted in the same manner as in Example 1 with the addition of Na 2 SiO 3 .9H 2 O. The results were also the same as in Example 1.
Claims (1)
ナトリウムを添加してなる蓄熱剤。 ２ 核剤を、その溶解度以上に添加したことを特
徴とする特許請求の範囲第１項記載の蓄熱剤。 ３ 増粘剤を添加したことを特徴とする特許請求
の範囲第１項または第２項記載の蓄熱剤。 ４ 増粘剤がカルボキシルメチルセルロースであ
ることを特徴とする特許請求の範囲第３項記載の
蓄熱剤。[Claims] 1. A heat storage agent made by adding sodium silicate as a nucleating agent to calcium bromide hydrate. 2. The heat storage agent according to claim 1, wherein the nucleating agent is added in an amount higher than its solubility. 3. The heat storage agent according to claim 1 or 2, characterized in that a thickener is added. 4. The heat storage agent according to claim 3, wherein the thickener is carboxymethylcellulose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13762781A JPS5838780A (en) | 1981-08-31 | 1981-08-31 | Heat-accumulation material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13762781A JPS5838780A (en) | 1981-08-31 | 1981-08-31 | Heat-accumulation material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5838780A JPS5838780A (en) | 1983-03-07 |
| JPS6142958B2 true JPS6142958B2 (en) | 1986-09-25 |
Family
ID=15203075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13762781A Granted JPS5838780A (en) | 1981-08-31 | 1981-08-31 | Heat-accumulation material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5838780A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0126396B1 (en) * | 1983-05-20 | 1989-09-13 | Hitachi, Ltd. | Heat storage material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5090585A (en) * | 1973-12-13 | 1975-07-19 |
-
1981
- 1981-08-31 JP JP13762781A patent/JPS5838780A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5090585A (en) * | 1973-12-13 | 1975-07-19 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5838780A (en) | 1983-03-07 |
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