JPH0450357B2 - - Google Patents
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- Publication number
- JPH0450357B2 JPH0450357B2 JP61075970A JP7597086A JPH0450357B2 JP H0450357 B2 JPH0450357 B2 JP H0450357B2 JP 61075970 A JP61075970 A JP 61075970A JP 7597086 A JP7597086 A JP 7597086A JP H0450357 B2 JPH0450357 B2 JP H0450357B2
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- Prior art keywords
- weight
- storage material
- heat storage
- melting point
- latent heat
- Prior art date
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Description
【発明の詳細な説明】
［産業上の利用分野］
本発明はK2HPO4・6H2Oを主成分とする蓄熱
材組成物に関し、詳細には該組成物にKH2PO4及
び／又はCaHPO4・2H2Oを所定量配合すること
によつて、潜熱の大幅な低下を招くことなく融点
を目標値まで低下し得た蓄熱材組成物に関するも
のである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a heat storage material composition containing K 2 HPO 4 .6H 2 O as a main component, and more specifically, the present invention relates to a heat storage material composition containing KH 2 PO 4 and/or KH 2 PO 4 and/or The present invention relates to a heat storage material composition whose melting point can be lowered to a target value without causing a significant decrease in latent heat by blending a predetermined amount of CaHPO 4 .2H 2 O.
［従来の技術］
低温排熱の蓄熱，空調（冷房），ケミカルヒー
トポンプ等に用いられる蓄熱材組成物としては、
凝固点（融点，相転移点を含む、以下同じ）が30
℃付近のCaCl2・6H2OやNa2SO4・10H2Oを主剤
とし、これに融点調節剤を添加したもの等が用い
られている。[Prior art] Heat storage material compositions used for low-temperature waste heat storage, air conditioning (cooling), chemical heat pumps, etc.
Freezing point (including melting point and phase transition point, same below) is 30
The main ingredient used is CaCl 2 .6H 2 O or Na 2 SO 4 .10H 2 O at around ℃, with a melting point regulator added thereto.
［発明が解決しようとする問題点］
ところが上記蓄熱材組成物を低温（５〜12℃、
以下同じ）用のものとして用いる為には、融点調
節剤例えばNaCl，NH4Cl，KCl，Mg（NO3）2・
7H2O等の添加率を数10％まで高めてやることが
必要であり、該添加率の増大に伴なつて潜熱が著
しく低下し、蓄熱材としての本来的機能に支障が
生じている。ちなみにNa2SO4・10H2O単独の場
合の融点は14℃、潜熱は22cal／ｇであるが、
Na2SO4・10H2O（78重量％），NaCl（12重量％）
NH4Cl（10重量％）からなる蓄熱材は、融点が５
℃まで下るという効果の反面、潜熱が18cal／ｇ
にまで低下するという欠点がある。また
Na2SO4・10H2O（83重量％）とKCl（17重量％）
からなる蓄熱材は、融点：５℃，潜熱：19cal／
ｇである。[Problems to be Solved by the Invention] However, when the above heat storage material composition is heated at low temperatures (5 to 12°C,
(the same applies hereinafter), melting point regulators such as NaCl, NH 4 Cl, KCl, Mg(NO 3 ) 2 .
It is necessary to increase the addition rate of 7H 2 O, etc. to several tens of percent, and as the addition rate increases, the latent heat decreases significantly, causing a problem in the original function as a heat storage material. By the way, the melting point of Na 2 SO 4 10H 2 O alone is 14℃ and the latent heat is 22 cal/g.
Na2SO4 ・ 10H2O (78% by weight), NaCl (12% by weight)
The heat storage material made of NH 4 Cl (10% by weight) has a melting point of 5.
On the other hand, the latent heat is 18 cal/g.
The disadvantage is that it drops to . Also
Na 2 SO 4 10H 2 O (83 wt%) and KCl (17 wt%)
The heat storage material consists of melting point: 5℃, latent heat: 19cal/
It is g.
また融点調節剤としては、上記の他ポリグリコ
ールE400（融点８℃，潜熱23.2cal／ｇ）やｎ−テ
トラデカン（融点5.9℃，潜熱54.7cal／ｇ）等も
挙げられるが高価であり実用的でない。 In addition to the above, other melting point regulators include polyglycol E400 (melting point 8°C, latent heat 23.2 cal/g) and n-tetradecane (melting point 5.9°C, latent heat 54.7 cal/g), but these are expensive and impractical. .
本発明は上述の如き事情に鑑みてなされたもの
であつて、相変化が低温で起こると共に潜熱が大
きく、しかも上記相変化温度を自在に調節するこ
とのできる安価な蓄熱材組成物を提供しようとす
るものである。 The present invention has been made in view of the above-mentioned circumstances, and it is an object of the present invention to provide an inexpensive heat storage material composition in which a phase change occurs at a low temperature and a large latent heat, and the phase change temperature can be freely adjusted. That is.
［問題点を解決する為の手段］
本発明に係る蓄熱材組成物とは、K2HPO4・
6H2Oを主成分とし、且つ融点調節剤として
KH2PO4：１〜15重量％又はCaHPO4・2H2O：
１〜10重量％、若しくはKH2PO4とCaHPO4・
2H2Oを複合添加する場合はそれらの総和で１〜
11重量％を含有するところに要旨が存在するもの
である。[Means for solving the problem] The heat storage material composition according to the present invention includes K 2 HPO 4 .
Contains 6H 2 O as a main component and as a melting point regulator
KH2PO4 : 1-15% by weight or CaHPO4.2H2O :
1-10% by weight, or KH 2 PO 4 and CaHPO 4 .
When adding 2H 2 O in combination, the total amount is 1~
The gist is that it contains 11% by weight.
［作用］
本発明者等は、相変化温度が比較的低く且つ潜
熱の大きい蓄熱材原料を見出そうとして種々研究
を重ねてきた。その結果それ自身の相変化温度が
14℃で潜熱が32cal／ｇのK2HPO4・6H2Oに着目
するに至つた。しかし５〜12℃という低温領域を
目標とする本発明では上記14℃という相変化温度
は極めて不満足である。そこで融点調節剤との併
用を考慮せざるを得なくなり、例えばKBr，Zn3
（PO4）2，NaH2PO4・2H2O，CaHPO4・2H2O，
Na3PO4，KH2PO4等をとりあげ、これらを上記
K2HPO4・6H2Oに加えて凝固点降下を測定した。
その結果第１図の如き凝固点降下結果を得たがこ
れによると低温用蓄熱材の融点調節剤としては
KH2PO4及びCaHPO4・2H2Oが最適であること
が分かつた。[Function] The present inventors have conducted various studies in an attempt to find a heat storage material raw material that has a relatively low phase change temperature and a large latent heat. As a result, its own phase change temperature is
We focused on K 2 HPO 4.6H 2 O, which has a latent heat of 32 cal/g at 14°C. However, in the present invention, which aims at a low temperature range of 5 to 12°C, the phase change temperature of 14°C is extremely unsatisfactory. Therefore, it is necessary to consider the use of melting point regulators, such as KBr, Zn 3
( PO4 ) 2 , NaH2PO4 ・ 2H2O , CaHPO4・2H2O ,
Take Na 3 PO 4 , KH 2 PO 4 , etc., and combine them with the above
In addition to K2HPO4.6H2O , freezing point depression was measured.
As a result, we obtained the freezing point depression results shown in Figure 1, which indicate that it is suitable as a melting point regulator for low-temperature heat storage materials.
KH 2 PO 4 and CaHPO 4.2H 2 O were found to be optimal.
ところが本発明者等は、第２図に示す様に上記
融点調節剤を多く配合し過ぎると潜熱が小さくな
り、蓄熱材としての本来の機能を効果的に発揮す
ることができなくなることを知つた。 However, as shown in Figure 2, the present inventors have learned that if too much of the above-mentioned melting point regulator is blended, the latent heat decreases, making it impossible to effectively perform its original function as a heat storage material. .
そこで本発明者等は上記KH2PO4及び／又は
CaHPO4・2H2Oの配合率について潜熱の立場か
ら一定の上限を設けると共に融点降下量の立場か
ら下限を規定して本発明を完成するに至つた。即
ち本発明は、前述の如く融点調節剤として
KH2PO4：１〜15重量％又はCaHPO4・2H2O：
１〜10重量％を含むか、若しくはKH2PO4と
CaHPO4・2H2Oを複合添加する場合はそれらの
総計が１〜11重量％となる様に調整するところに
特徴を有するものである。ここに夫々の下限を規
定したのは目的とする相変化温度を達成する為で
あり、上限を規定したのは潜熱が20cal／ｇ未満
となつて蓄熱材としての機能を効果的に発揮し得
なくなるからである。 Therefore, the present inventors proposed the above-mentioned KH 2 PO 4 and/or
The present invention was completed by setting a certain upper limit on the blending ratio of CaHPO 4 .2H 2 O from the viewpoint of latent heat and defining a lower limit from the viewpoint of melting point depression. That is, the present invention, as described above, uses
KH2PO4 : 1-15% by weight or CaHPO4.2H2O :
Contains 1-10% by weight or with KH 2 PO 4
When CaHPO 4 .2H 2 O is added in combination, it is characterized in that the total amount thereof is adjusted to 1 to 11% by weight. The lower limits were specified here in order to achieve the target phase change temperature, and the upper limits were specified so that the latent heat would be less than 20 cal/g and the function as a heat storage material could be effectively demonstrated. Because it will disappear.
また上記範囲内でKH2PO4及び／又は
CaHPO4・2H2Oを配合することによつて、相変
化温度を自由にしかも容易に調節することが可能
となり、用途の選択幅を広げることができる。 Also within the above range KH 2 PO 4 and/or
By blending CaHPO 4 .2H 2 O, it becomes possible to freely and easily adjust the phase change temperature, and the range of applications can be expanded.
本発明は、大略以上の様に構成されたものであ
るが、必要に応じて下記の如き成分を添加するこ
とができる。 The present invention is generally constructed as described above, but the following components may be added as necessary.
(1) 核剤
該核剤としてはCa2P2O7，Ca3（PO4）2・2H2O，
CaHP4・2H2O，Zn3（PO4）2・4H2O，CaCl2（水
和物も含む），CaS，CaSiO3等を挙げることがで
きる。この様に核剤を使用することによつて
K2HPO4・6H2Oの過冷却現象を阻止することが
でき、蓄熱材としての性能をより一層向上させる
ことができる。但しこの様な核剤を使用するに当
たつては、低温（５〜12℃）でより有効な核形成
作用を有するCa2P2O7を使用するのが推奨され
る。また配合割合としては、１〜10重量％が推奨
される。(1) Nucleating agent The nucleating agent includes Ca 2 P 2 O 7 , Ca 3 (PO 4 ) 2・2H 2 O,
Examples include CaHP 4 2H 2 O, Zn 3 (PO 4 ) 2 4H 2 O, CaCl 2 (including hydrates), CaS, CaSiO 3 and the like. By using a nucleating agent in this way,
It is possible to prevent the supercooling phenomenon of K 2 HPO 4 6H 2 O, and further improve its performance as a heat storage material. However, when using such a nucleating agent, it is recommended to use Ca 2 P 2 O 7 , which has a more effective nucleation effect at low temperatures (5 to 12° C.). The recommended blending ratio is 1 to 10% by weight.
(2) 増粘剤
使用中における相分離を防止する目的で、増粘
剤を加えることができる。該増粘剤としては、グ
リセリンやエチレングリコール等のアルコール
類，カルボキシメチルセルロース，ポリアクリル
酸ナトリウム，グリセリンと超微粉末シリカの混
合組成物等を例示することができる。これらの配
合割合は、１〜５重量％が好ましい。(2) Thickener A thickener can be added to prevent phase separation during use. Examples of the thickener include alcohols such as glycerin and ethylene glycol, carboxymethyl cellulose, sodium polyacrylate, and a mixed composition of glycerin and ultrafine powdered silica. The blending ratio of these is preferably 1 to 5% by weight.
以下実施例として本発明の蓄熱材組成例を挙げ
ることによつて本発明を具体的に説明するが、該
実施例は本発明の単なる例示に過ぎず本発明の主
旨に反しない限り任意に変更することができる。 The present invention will be specifically explained below by giving examples of the composition of the heat storage material of the present invention as examples, but these examples are merely illustrative of the present invention, and changes may be made arbitrarily as long as they do not go against the gist of the present invention. can do.
［実施例］
実施例 １
融点が５℃の蓄熱材組成物として：
(1) K2HPO4・6H2O（90重量％），KH2PO4（10重
量％），潜熱29cal／ｇ
(2) K2HPO4・6H2O（90重量％），CaHPO4・
2H2O（10重量％），潜熱26cal／ｇ
(3) K2HPO4・6H2O（89重量％），KH2PO4（10重
量％），Ca2PO7（10重量％，核剤），潜熱
29cal／ｇ
(4) K2HPO4・6H2O（89重量％），KH2PO4（10重
量％），CaCl2・H2O（１重量％，１核剤），潜
熱29cal／ｇ
(5) K2HPO4・6H2O（88重量％），KH2PO4（10重
量％），Ca2P2O7（１重量％，核剤），CaCL2・
2H2O（１重量％，核剤），潜熱28cal／ｇ
実施例 ２
融点が７℃の蓄熱材組成物として：
K2HPO4・6H2O（89重量％），Ca2HPO4・
2H2O（10重量％），Ca2P2O7（１重量％，核剤），
潜熱26cal／ｇ
実施例 ３
融点が８℃の蓄熱材組成物として：
K2HPO4・6H2O（94重量％），KH2PO4（５重量
％），Ca2P2O7（１重量％，核剤），潜熱29.5cal／
ｇ
実施例 ４
融点が10℃の蓄熱材組成物として：
K2HPO4・6H2O（97重量％），KH2PO4（２重量
％），Ca2P2O7（１重量％，核剤），潜熱31cal／ｇ
［発明の効果］
本発明は上述の如く構成されているので、相変
化が低温で起り且つ潜熱が大きく、しかも相変化
温度を容易に且つ自在に調節することのできる安
価な蓄熱材組成物を提供することができた。[Examples] Example 1 As a heat storage material composition with a melting point of 5°C: (1) K 2 HPO 4 6H 2 O (90% by weight), KH 2 PO 4 (10% by weight), latent heat 29 cal/g ( 2) K 2 HPO 4・6H 2 O (90% by weight), CaHPO 4・
2H 2 O (10% by weight), latent heat 26 cal/g (3) K 2 HPO 4・6H 2 O (89% by weight), KH 2 PO 4 (10% by weight), Ca 2 PO 7 (10% by weight, nuclear agent), latent heat
29cal/g (4) K 2 HPO 4・6H 2 O (89% by weight), KH 2 PO 4 (10% by weight), CaCl 2・H 2 O (1% by weight, 1 nucleating agent), latent heat 29cal/g (5) K 2 HPO 4・6H 2 O (88% by weight), KH 2 PO 4 (10% by weight), Ca 2 P 2 O 7 (1% by weight, nucleating agent), CaCL 2・
2H 2 O (1% by weight, nucleating agent), latent heat 28 cal/g Example 2 As a heat storage material composition with a melting point of 7°C: K 2 HPO 4・6H 2 O (89% by weight), Ca 2 HPO 4・
2H 2 O (10% by weight), Ca 2 P 2 O 7 (1% by weight, nucleating agent),
Latent heat 26 cal/g Example 3 As a heat storage material composition with a melting point of 8°C: K 2 HPO 4 6H 2 O (94% by weight), KH 2 PO 4 (5% by weight), Ca 2 P 2 O 7 (1 weight%, nucleating agent), latent heat 29.5cal/
g Example 4 As a heat storage material composition with a melting point of 10°C: K 2 HPO 4 6H 2 O (97% by weight), KH 2 PO 4 (2% by weight), Ca 2 P 2 O 7 (1% by weight, Nucleating agent), latent heat 31 cal/g [Effects of the invention] Since the present invention is configured as described above, the phase change occurs at a low temperature, the latent heat is large, and the phase change temperature can be easily and freely adjusted. It was possible to provide an inexpensive heat storage material composition that can be used.
第１図はK2HPO4・6H2Oの凝固点と凝固点降
下剤の添加率との関係を示す図、第２図は
KH2PO4及びCaHPO4・2H2Oについての添加率
−潜熱量の各関係を示す図である。
Figure 1 is a diagram showing the relationship between the freezing point of K 2 HPO 4 6H 2 O and the addition rate of freezing point depressant, and Figure 2 is
It is a figure which shows each relationship of addition rate - latent heat amount about KH2PO4 and CaHPO4 * 2H2O .
Claims (1)
節剤としてKH2PO4：１〜15重量％又は
CaHPO4・2H2O：１〜10重量％、若しくは
KH2PO4とCaHPO4・2H2Oを複合添加する場合
はそれらの総和で１〜11重量％を含有することを
特徴とする蓄熱材組成物。1 K2HPO4.6H2O as the main component, and KH2PO4 as a melting point regulator: 1 to 15% by weight or
CaHPO4・2H2O : 1 to 10% by weight, or
A heat storage material composition characterized in that when a combination of KH 2 PO 4 and CaHPO 4 .2H 2 O is added, the total amount thereof is 1 to 11% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7597086A JPS62232483A (en) | 1986-04-02 | 1986-04-02 | Heat storing material composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7597086A JPS62232483A (en) | 1986-04-02 | 1986-04-02 | Heat storing material composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62232483A JPS62232483A (en) | 1987-10-12 |
| JPH0450357B2 true JPH0450357B2 (en) | 1992-08-14 |
Family
ID=13591596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7597086A Granted JPS62232483A (en) | 1986-04-02 | 1986-04-02 | Heat storing material composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62232483A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62238300A (en) * | 1986-04-04 | 1987-10-19 | Kubota Ltd | Heat storage material composition |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5211061A (en) * | 1975-07-17 | 1977-01-27 | Sankyo Co Ltd | Method to check quantity of liquid contained in an ampoule |
-
1986
- 1986-04-02 JP JP7597086A patent/JPS62232483A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62232483A (en) | 1987-10-12 |
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