JPH0336072B2 - - Google Patents
Info
- Publication number
- JPH0336072B2 JPH0336072B2 JP58011528A JP1152883A JPH0336072B2 JP H0336072 B2 JPH0336072 B2 JP H0336072B2 JP 58011528 A JP58011528 A JP 58011528A JP 1152883 A JP1152883 A JP 1152883A JP H0336072 B2 JPH0336072 B2 JP H0336072B2
- Authority
- JP
- Japan
- Prior art keywords
- heat storage
- storage material
- weight
- strontium
- calcium chloride
- 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 - Lifetime
Links
Description
〔産業上の利用分野〕
本発明は太陽熱や深夜電力等を蓄えるための潜
熱蓄熱材及びその製造する方法に関するものであ
る。
〔従来の技術〕
太陽熱や深夜電力等を蓄熱してこの熱をヒート
ポンプ式暖房機の熱源や温室の熱源として利用す
る場合、潜熱蓄熱材としては15〜28℃程度の温度
範囲の融点を有する物質が望まれる。
従来、塩化カルシウム（CaCl2）の水和物すな
わち、塩化カルシウム６水塩（CaCl2・6H2O）
を利用すると、比較的低い温度範囲の融点の蓄熱
材が得られることが米国特許4189394によつて知
られている。この材料は、潜熱も大きく不燃性で
無公害な材料であるため、蓄熱材としてすぐれた
材料である。
又、特開昭50−90582号公報には塩化カルシウ
ム・６水塩に塩化ナトリウムを添加する蓄熱材が
記載されている。
塩化カルシウム６水塩の製法としては、例えば
大理石（炭酸カルシウム：CaCO3）を塩酸
（HCl）で溶かし、炭酸ガスを発生させ、残りの
廃液を蒸発させて取り出す方法が知られている。
〔発明が解決しようとする課題〕
上記米国特許は発核剤の発明であり、製造方法
については記載されていない。特に、蓄熱材料の
融点を15℃〜28℃の任意の範囲に調整する方法に
ついてはなんら記載されていない。
又、特開昭50−90582号公報に記載の蓄熱材は、
融点（包晶点）30℃を有するものであり、凝固−
融解させて使用している時、包晶反応を起してい
るので二相分離して動作しなくなるものであつ
た。
又、上記方法は、塩酸を使用しなければならな
いこと、炭酸ガスが発生する等危険を伴い、しか
も高価である。
本発明の目的は、15〜28℃程度の温度範囲の融
点を凝固−融解させたヒートサイクルに耐え得る
蓄熱材とその蓄熱材を安全かつ安価に製造する方
法を提供することにある。
〔課題を解決するための手段〕
本発明の特徴は、水に塩化カルシウム70重量％
以上、塩化ナトリウム0.1〜５重量％を含む工業
用塩化カルシウムを52〜65重量％添加してなる蓄
熱材を形成するところにある。
〔作用〕
本発明の蓄熱材は水に塩化カルシウム70重量％
以上、塩化ナトリウム0.1〜５重量％を含む工業
用塩化カルシウムを52〜65重量％添加しているの
で、蓄熱材として使用中、融点の高く融解し難い
塩化カルシウムが蓄熱槽の下部に沈殿することが
なく、かつ融点も安定であるので、実用的な蓄熱
材を得ることができる。又、その蓄熱材を安価に
安全に製造できる。
〔実施例〕
本発明は、工業用塩化カルシウムからの蓄熱材
の原料となる塩化カルシウムを製造するものであ
る。工業用塩化カルシウムには不純物が含まれて
いるが、これに適切な処理をほどこすことによ
り、蓄熱材の原料とすることができる。
従つてアンモニアソーダ法で、炭酸カルシウム
を製造する際廃棄物として出てくる安価な工業用
塩化カルシウムを利用できる。
第１表は工業用塩化カルシウムの中から４種類
選んでその成分を分析した結果である。
[Industrial Application Field] The present invention relates to a latent heat storage material for storing solar heat, late-night electricity, etc., and a method for manufacturing the same. [Conventional technology] When storing solar heat, late-night electricity, etc. and using this heat as a heat source for a heat pump type heater or a heat source for a greenhouse, a substance with a melting point in the temperature range of about 15 to 28 degrees Celsius is used as a latent heat storage material. is desired. Conventionally, calcium chloride (CaCl 2 ) hydrate, that is, calcium chloride hexahydrate (CaCl 2 6H 2 O)
It is known from US Pat. No. 4,189,394 that a heat storage material having a melting point in a relatively low temperature range can be obtained by using the following. This material has a large amount of latent heat, is nonflammable, and is non-polluting, making it an excellent material as a heat storage material. Furthermore, JP-A-50-90582 describes a heat storage material in which sodium chloride is added to calcium chloride hexahydrate. As a method for producing calcium chloride hexahydrate, for example, a method is known in which marble (calcium carbonate: CaCO 3 ) is dissolved in hydrochloric acid (HCl), carbon dioxide gas is generated, and the remaining waste liquid is evaporated and removed. [Problems to be Solved by the Invention] The above US patent is an invention of a nucleating agent and does not describe a manufacturing method. In particular, there is no description of a method for adjusting the melting point of the heat storage material to an arbitrary range of 15°C to 28°C. In addition, the heat storage material described in Japanese Patent Application Laid-open No. 50-90582 is
It has a melting point (peritectic point) of 30℃, and solidification -
When melted and used, a peritectic reaction occurs, resulting in two-phase separation and failure. Furthermore, the above method involves risks such as the necessity of using hydrochloric acid and the generation of carbon dioxide gas, and is also expensive. An object of the present invention is to provide a heat storage material that can withstand heat cycles with a melting point in the temperature range of about 15 to 28° C., and a method for producing the heat storage material safely and inexpensively. [Means for Solving the Problems] The feature of the present invention is that 70% by weight of calcium chloride is added to water.
As described above, a heat storage material is formed by adding 52 to 65% by weight of industrial calcium chloride containing 0.1 to 5% by weight of sodium chloride. [Function] The heat storage material of the present invention contains 70% by weight of calcium chloride in water.
As mentioned above, since 52 to 65% by weight of industrial calcium chloride containing 0.1 to 5% by weight of sodium chloride is added, calcium chloride, which has a high melting point and is difficult to melt, will precipitate at the bottom of the heat storage tank during use as a heat storage material. Since there is no heat storage material and the melting point is stable, a practical heat storage material can be obtained. Moreover, the heat storage material can be manufactured safely and inexpensively. [Example] The present invention is to produce calcium chloride, which is a raw material for a heat storage material, from industrial calcium chloride. Industrial calcium chloride contains impurities, but by appropriately treating it, it can be used as a raw material for heat storage materials. Therefore, the ammonia soda method can utilize inexpensive industrial calcium chloride, which is produced as waste during the production of calcium carbonate. Table 1 shows the results of analyzing the components of four types selected from industrial calcium chloride.
【表】
いずれの場合も、塩化カルシウムの主成分
CaCl2が70％余含まれている。
また、CaCl2以外に若干のNaCl、微量のFe2O3
やCaSO4それに小石やゴミ等の残滓を若干含んで
いて、残りは水（H2O）が入つている。この工
業用塩化カルシウムそのままでは、融点が80℃以
上と高く本発明の目的の蓄熱材としては利用でき
ない。このため、これに水を加えて融点を調整す
る必要がある。
第１図は第１表に示す工業用塩化カルシウム
に、室温状態にて水を種々の割合で加えて、その
融点を実測した結果である。横軸に工業用塩化カ
ルシウムＣの重量％をとり、縦軸に融点Tn（℃）
をとつて示してある。図中●印で示す曲線は融
雪用、○印で示す曲線は食品添加用のもの、○[Table] In either case, the main component of calcium chloride
Contains over 70% CaCl 2 . In addition to CaCl 2 , there is also a small amount of NaCl and a trace amount of Fe 2 O 3
It contains some residue such as pebbles and dirt, CaSO 4 , and some residue such as pebbles and dirt, and the rest is water (H 2 O). This industrial calcium chloride as it is has a high melting point of 80° C. or higher and cannot be used as a heat storage material for the purpose of the present invention. Therefore, it is necessary to add water to adjust the melting point. FIG. 1 shows the results of actually measuring the melting point of industrial calcium chloride shown in Table 1 by adding water in various proportions at room temperature. The horizontal axis shows the weight percent of industrial calcium chloride C, and the vertical axis shows the melting point T n (°C).
It is shown below. In the figure, the curve marked with ● is for snow melting, the curve marked with ○ is for food additive, ○†
Claims (1)
リウム0.1〜５重量％を含む工業用塩化カルシウ
ムを52〜65重量％添加してなる蓄熱材。 ２ 発核剤として水酸化カルシウムと酸化ストロ
ンチウム、リン酸ストロンチウム、水酸化ストロ
ンチウム、水酸化ストロンチウム・８水塩のうち
少なくとも１種類の物質とを添加してなる特許請
求範囲第１項の蓄熱材。 ３ 発核剤として、水酸化カルシウムと酸化スト
ロンチウム、リン酸ストロンチウム、水酸化スト
ロンチウム、水酸化ストロンチウム８水塩のうち
少なくとも１種類の物質とをそれぞれ0.01〜10重
量％添加してなる特許請求範囲第２項の蓄熱材。 ４ 容器内の水に塩化カルシウム70重量％以上、
塩化ナトリウム0.1〜５重量％を含む工業用塩化
カルシウムを52〜65重量％添加した後、これを60
℃〜80℃の範囲で加熱して、容器内の上澄液を採
つて蓄熱材としたことを特徴とした蓄熱材の製造
方法。 ５ 上澄液に、発核剤として水酸化カルシウムと
酸化ストロンチウム、リン酸ストロンチウム、水
酸化ストロンチウム、水酸ストロンチウム８水塩
のうち少なくとも１種類の物質とをそれぞれ0.01
〜10重量％添加したことを特徴とする特許請求範
囲第４項の蓄熱材の製造方法。[Scope of Claims] 1. A heat storage material obtained by adding 52 to 65% by weight of industrial calcium chloride containing 70% by weight or more of calcium chloride and 0.1 to 5% by weight of sodium chloride to water. 2. The heat storage material according to claim 1, which contains calcium hydroxide and at least one substance selected from strontium oxide, strontium phosphate, strontium hydroxide, and strontium hydroxide octahydrate as a nucleating agent. 3. As a nucleating agent, calcium hydroxide and at least one substance selected from strontium oxide, strontium phosphate, strontium hydroxide, and strontium hydroxide octahydrate are added in an amount of 0.01 to 10% by weight, respectively. 2. Heat storage material. 4 Calcium chloride 70% or more by weight in the water in the container,
After adding 52-65% by weight of industrial calcium chloride containing 0.1-5% by weight of sodium chloride, this
A method for producing a heat storage material, characterized in that the heat storage material is heated by heating in a range of 80°C to 80°C, and the supernatant liquid in the container is collected. 5 Add 0.01 each of calcium hydroxide and at least one substance selected from strontium oxide, strontium phosphate, strontium hydroxide, and strontium hydroxide octahydrate as a nucleating agent to the supernatant liquid.
The method for producing a heat storage material according to claim 4, characterized in that ~10% by weight is added.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1152883A JPS59138289A (en) | 1983-01-28 | 1983-01-28 | Heat-accumulation material and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1152883A JPS59138289A (en) | 1983-01-28 | 1983-01-28 | Heat-accumulation material and its production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59138289A JPS59138289A (en) | 1984-08-08 |
| JPH0336072B2 true JPH0336072B2 (en) | 1991-05-30 |
Family
ID=11780462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1152883A Granted JPS59138289A (en) | 1983-01-28 | 1983-01-28 | Heat-accumulation material and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59138289A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4585573A (en) * | 1981-12-09 | 1986-04-29 | Hitachi, Ltd. | Heat storage material and process for producing the same |
| ATE133991T1 (en) * | 1989-06-06 | 1996-02-15 | Gerd Hoermansdoerfer | LATENT HEAT STORAGE AGENTS AND THEIR USE |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5141704B2 (en) * | 1973-12-13 | 1976-11-11 |
-
1983
- 1983-01-28 JP JP1152883A patent/JPS59138289A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59138289A (en) | 1984-08-08 |
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