JPH03285985A - Latent heat-accumulating material - Google Patents
Latent heat-accumulating materialInfo
- Publication number
- JPH03285985A JPH03285985A JP8782590A JP8782590A JPH03285985A JP H03285985 A JPH03285985 A JP H03285985A JP 8782590 A JP8782590 A JP 8782590A JP 8782590 A JP8782590 A JP 8782590A JP H03285985 A JPH03285985 A JP H03285985A
- Authority
- JP
- Japan
- Prior art keywords
- latent heat
- heat storage
- hydrogen phosphate
- disodium hydrogen
- solidification
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 title description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 10
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims abstract description 10
- 239000002667 nucleating agent Substances 0.000 claims abstract description 10
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 5
- 238000005338 heat storage Methods 0.000 claims description 22
- 239000011232 storage material Substances 0.000 claims description 15
- DGLRDKLJZLEJCY-UHFFFAOYSA-L disodium hydrogenphosphate dodecahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.O.O.[Na+].[Na+].OP([O-])([O-])=O DGLRDKLJZLEJCY-UHFFFAOYSA-L 0.000 claims description 7
- 238000002844 melting Methods 0.000 abstract description 9
- 230000008018 melting Effects 0.000 abstract description 9
- 238000004781 supercooling Methods 0.000 abstract description 8
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 abstract description 4
- 239000003795 chemical substances by application Substances 0.000 abstract 2
- 230000001747 exhibiting effect Effects 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 238000007711 solidification Methods 0.000 description 13
- 230000008023 solidification Effects 0.000 description 12
- 150000004677 hydrates Chemical class 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 235000010216 calcium carbonate Nutrition 0.000 description 2
- 159000000007 calcium salts Chemical class 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 229910000397 disodium phosphate Inorganic materials 0.000 description 1
- 235000019800 disodium phosphate Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、潜熱蓄熱材に関する。更に詳しくは、凝固時
の過冷却の程度を軽減し、長期の熱サイクルに対し安定
した性能を発揮する潜熱蓄熱材に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a latent heat storage material. More specifically, the present invention relates to a latent heat storage material that reduces the degree of supercooling during solidification and exhibits stable performance against long-term thermal cycles.
潜熱蓄熱材としては、従来から水や砕石が用いられてき
たが、これらは蓄熱密度が小さいため（ｌｅａｆ／ｇ−
ｄｅｇ以下）、実用に際してはかなり大きな蓄熱器を必
要とする。また、放熱に伴って、蓄熱器内の温度は徐々
に低下するので、安定な熱エネルギーを得ることは、技
術的にかなり困難である。Water and crushed stone have traditionally been used as latent heat storage materials, but these have low heat storage density (leaf/g-
deg or less), a fairly large heat storage device is required for practical use. Furthermore, as the heat is radiated, the temperature inside the heat storage device gradually decreases, so it is technically quite difficult to obtain stable thermal energy.
これに対し、近年物質の融解、凝固の際の潜熱を蓄熱に
応用する研究、開発が盛んになってきている。このよう
な潜熱型の蓄熱材の特徴は、材料の融解温度に一致した
一定温度の熱エネルギーを、数１０ｃａｌ／ｇという高
い蓄熱密度で安定に吸収および放出できる点にある。In response, research and development on applying latent heat during melting and solidification of substances to heat storage has become active in recent years. A feature of such a latent heat type heat storage material is that it can stably absorb and release thermal energy at a constant temperature corresponding to the melting temperature of the material at a high heat storage density of several tens of cal/g.
かかる潜熱蓄熱材としては、パラフィンワックスや高級
脂肪酸などの有機物や無機水和物などが注目されている
。As such latent heat storage materials, organic substances and inorganic hydrates such as paraffin wax and higher fatty acids are attracting attention.
潜熱蓄熱材としての有機物は、融解、凝固時における安
定性は良好であるものの、材料自身の熱伝導が悪いため
、熱の吸収および放出を行なう上で問題がある。また、
比重が小さいため、蓄熱器も比較的大きなものとなって
くる。Although organic materials as latent heat storage materials have good stability during melting and solidification, they have problems in absorbing and releasing heat because the materials themselves have poor thermal conductivity. Also,
Since the specific gravity is small, the heat storage device is also relatively large.
一方、無機水和物は、有機物蓄熱材と比較して熱伝導率
は約２倍程よく、比重も１．５〜２．０程度と大きいた
め、蓄熱器も小さくすることができる。On the other hand, inorganic hydrates have about twice the thermal conductivity as organic heat storage materials, and have a high specific gravity of about 1.5 to 2.0, so the heat storage device can also be made smaller.
しかるに、無機水和物は、一般に凝固開始温度が融解温
度よりも低くなるという、いわゆる過冷却現象を示す、
かかる現象は、無機水和物を蓄熱材として用いた場合、
一定温度の熱エネルギーを安定して吸収および放出する
という潜熱蓄熱材の特徴を著しく損わせるものである。However, inorganic hydrates generally exhibit a so-called supercooling phenomenon in which the solidification initiation temperature becomes lower than the melting temperature.
This phenomenon occurs when inorganic hydrates are used as heat storage materials.
This significantly impairs the characteristic of the latent heat storage material that it stably absorbs and releases thermal energy at a constant temperature.
リン酸水素２ナトリウム・１２水和物Ｎａ２ＨＰＯ４・
１２Ｈ，０は、融解温度が３６℃であり、潜熱量が５４
ｃａｌ／ｇ（示差走査熱量計による）の潜熱蓄熱材であ
るが、この無機水和物の場合にも過冷却現象がみられる
。Disodium hydrogen phosphate, dodecahydrate Na2HPO4,
12H,0 has a melting temperature of 36°C and a latent heat of 54
cal/g (measured by differential scanning calorimeter), but a supercooling phenomenon is also observed in the case of this inorganic hydrate.
即ち。−旦融解させたリン酸水素２ナトリウム・１２水
和物は、約２０℃前後の室温に放置しても固化しないの
である。これは、リン酸水素２ナトリウム・１２水和物
の凝固開始温度が約１０℃であり、結局約２５℃近い温
度差に相当する過冷却を生ずるためである。従って、３
６℃における熱の吸収・放出が全く円滑に行われないの
で、これ単独では潜熱蓄熱材として使用することができ
ない。That is. - Once melted, disodium hydrogen phosphate dodecahydrate does not solidify even if it is left at room temperature around 20°C. This is because the solidification initiation temperature of disodium hydrogen phosphate dodecahydrate is about 10°C, which results in supercooling corresponding to a temperature difference of about 25°C. Therefore, 3
Since absorption and release of heat at 6° C. is not performed smoothly at all, it cannot be used alone as a latent heat storage material.
本発明は、リン酸水素２ナトリウム・１２水和物の過冷
却の程度を軽減させた潜熱蓄熱材を提供することを目的
とする。An object of the present invention is to provide a latent heat storage material in which the degree of supercooling of disodium hydrogen phosphate dodecahydrate is reduced.
〔課題を解決するための手段〕および〔作用〕かかる目
的を達成させる本発明の潜熱蓄熱材は。[Means for Solving the Problem] and [Operation] The latent heat storage material of the present invention achieves the above objects.
リン酸水素２ナトリウム・１２水和物に発核剤として硫
酸カルシウムおよび炭酸カルシウムを添加してなる。こ
れらのカルシウム塩は、いずれも無水物または水和物（
ＣａＣＯ，・２Ｎ、 ０、Ｃａ５Ｏ，・２）１，０．
ＣａＳＯ４・０．５Ｈ，０など）として用いることがで
き、その混合割合はＣａ５Ｏ，： ＣａＣＯ３の重量比
で約９５〜５：約５〜９５である。It is made by adding calcium sulfate and calcium carbonate as nucleating agents to disodium hydrogen phosphate dodecahydrate. All of these calcium salts are available in anhydrous or hydrated form (
CaCO, ・2N, 0, Ca5O, ・2) 1,0.
CaSO4.0.5H,0, etc.), and the mixing ratio thereof is about 95-5:about 5-95 in weight ratio of Ca5O:CaCO3.
添加された２種の発核剤による過冷却軽減の程度は、そ
の添加合計量によっても異なるが、必要量以上の発核剤
を添加すると、リン酸水素２ナトリウム・１２水和物本
来の潜熱量が著しく低下し、蓄熱材としての機能が失わ
れるばかりではなく、材料の変質をも招くため、一般に
これら両者はＮａ、 ＨＰＯ，・１２Ｈ，Ｏニ対して、
約０．１〜２０重量ぶ、好ましくは約０．５〜ｌＯ重量
％の割合で用いられる。The degree of supercooling reduction due to the two types of nucleating agents added varies depending on the total amount added, but if more than the required amount of nucleating agent is added, the inherent latent heat of disodium hydrogen phosphate dodecahydrate will be reduced. In general, both of these are used in contrast to Na, HPO, .12H, and O, since the amount of heat storage material decreases markedly and the function as a heat storage material is lost, as well as deteriorating the quality of the material.
It is used in a proportion of about 0.1 to 20% by weight, preferably about 0.5 to 10% by weight.
リン酸水素２ナトリウム・１２水和物に硫酸カルシウム
および羨酸カルシウムを発核剤として添加することによ
り、過冷却度を著しく軽減することができる。また、そ
れに伴って、融解温度への復帰時間も短かくなり、それ
をくり返し加熱融解させた場合にも、その効果が失われ
ることがなく、長期にわたる使用においても安定した効
果が発揮される。By adding calcium sulfate and calcium envy as nucleating agents to disodium hydrogen phosphate dodecahydrate, the degree of supercooling can be significantly reduced. In addition, the time required to return to the melting temperature is also shortened, and the effect is not lost even when repeatedly heated and melted, and the effect is stable even during long-term use.
次に、実施例について本発明を説明する。 Next, the present invention will be explained with reference to examples.
実施例Ｉ
ＮａＪＰＯ４・１２Ｈ，０１０ｇを容量２０ｖｓ １の
ガラス製容器にとり、これＬ：ＣａＳＯ４・２Ｈｔ８０
．１２ｇトＣａＣ０，０，０６ｇとを添加し、密栓する
。これを恒温槽内に入れ、６０℃で加熱したところ３６
℃で融解した０次いで。Example I 010 g of NaJPO4.12H was placed in a glass container with a capacity of 20 vs. 1, and this L: CaSO4.2Ht80
．． Add 12 g and 0.06 g of CaC and seal the container. When this was placed in a constant temperature bath and heated at 60℃, 36
Then melt at 0 °C.
これを毎分１℃の冷却速度で冷却すると３１℃で凝固が
開始され、試料温度は３６℃に上昇して凝固が進行し、
凝固が終了するとその温度は低下した。When this is cooled at a cooling rate of 1°C per minute, solidification begins at 31°C, the sample temperature rises to 36°C, and solidification progresses.
Once solidification was complete, the temperature decreased.
また１発核剤を添加したものの凝固開始温度は。Also, what is the temperature at which solidification starts when one nucleating agent is added?
融解−凝固を２０回くり返しても±２℃の差の範囲内に
収った。従って、これら２種のカルシウム塩を発核剤と
して用いることで、融解温度（Ｔ＋）と凝固開始温度（
Ｔ１）との差（ΔＴｓｃ）は、発核剤を用いないときの
２６℃から約５℃に迄その値を低下させることができた
。Even after repeating melting and solidification 20 times, the difference was within ±2°C. Therefore, by using these two types of calcium salts as nucleating agents, the melting temperature (T+) and solidification start temperature (
The difference (ΔTsc) from T1) could be reduced from 26°C when no nucleating agent was used to about 5°C.
実施例２
実施例１において、発核剤としてＣａ５０４０．２０ｇ
およびＣａＣ０，０，２０ｇを用いると、３０”Ｃ１’
凝固が開始された。また、この融解−凝固を２０回くり
返しても、凝固開始温度は±２℃の差の範囲内に収まっ
た。Example 2 In Example 1, Ca5040.20g was used as the nucleating agent.
and CaC0,0,20g, 30"C1'
Coagulation has started. Moreover, even if this melting-solidification process was repeated 20 times, the solidification start temperature remained within a range of ±2°C.
Claims (1)
て硫酸カルシウムおよび炭酸カルシウムを添加してなる
潜熱蓄熱材。1. A latent heat storage material made by adding calcium sulfate and calcium carbonate as nucleating agents to disodium hydrogen phosphate dodecahydrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8782590A JP2805968B2 (en) | 1990-04-02 | 1990-04-02 | Latent heat storage material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8782590A JP2805968B2 (en) | 1990-04-02 | 1990-04-02 | Latent heat storage material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03285985A true JPH03285985A (en) | 1991-12-17 |
| JP2805968B2 JP2805968B2 (en) | 1998-09-30 |
Family
ID=13925731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8782590A Expired - Fee Related JP2805968B2 (en) | 1990-04-02 | 1990-04-02 | Latent heat storage material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2805968B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103673704A (en) * | 2012-09-25 | 2014-03-26 | 北京兆阳光热技术有限公司 | Heat storage and heat exchange equipment |
-
1990
- 1990-04-02 JP JP8782590A patent/JP2805968B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103673704A (en) * | 2012-09-25 | 2014-03-26 | 北京兆阳光热技术有限公司 | Heat storage and heat exchange equipment |
| WO2014048300A1 (en) * | 2012-09-25 | 2014-04-03 | 北京兆阳能源技术有限公司 | Heat storage-exchange equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2805968B2 (en) | 1998-09-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |