JP2001031958A - Method for using heat transport medium - Google Patents
Method for using heat transport mediumInfo
- Publication number
- JP2001031958A JP2001031958A JP11208902A JP20890299A JP2001031958A JP 2001031958 A JP2001031958 A JP 2001031958A JP 11208902 A JP11208902 A JP 11208902A JP 20890299 A JP20890299 A JP 20890299A JP 2001031958 A JP2001031958 A JP 2001031958A
- Authority
- JP
- Japan
- Prior art keywords
- trimethylolethane
- melting point
- heat transport
- transport medium
- aqueous solution
- 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.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、熱輸送媒体の使用
方法に関する。詳しくは、特定量のトリメチロールエタ
ン（以下、ＴＭＥと略記することがある）を含有する水
溶液を熱輸送媒体として使用する方法に関する。本発明
の方法は、ビル等の空調用として水やブラインよりも効
率的に用いることができる。[0001] The present invention relates to a method of using a heat transport medium. Specifically, the present invention relates to a method of using an aqueous solution containing a specific amount of trimethylolethane (hereinafter, may be abbreviated as TME) as a heat transport medium. The method of the present invention can be used more efficiently than water or brine for air conditioning of buildings and the like.
【０００２】[0002]
【従来の技術】氷蓄熱システムや地域熱供給システムに
ついては、経費削減の一環として、熱媒体を輸送するポ
ンプ動力の低減が求められている。このため、例えば空
調側で利用する温度差を大きくするとか、或いは熱媒体
中に界面活性剤を添加して流動抵抗を低減させる方法等
が検討されている。2. Description of the Related Art For an ice heat storage system and a district heat supply system, a reduction in pump power for transporting a heat medium is required as part of cost reduction. For this reason, for example, a method of increasing the temperature difference used on the air-conditioning side, or adding a surfactant to the heat medium to reduce the flow resistance has been studied.
【０００３】一方、熱媒体については、水に低温潜熱蓄
冷物質を分散混合した潜熱蓄冷材を用いる方法が検討さ
れている。例えば、パラフィンをｏ／ｗ型エマルジョン
にしてスラリーとして用いる方法やパラフィンをマイク
ロカプセルにして用いる方法、或いは低価格の無機水和
物を潜熱蓄冷材として利用する方法等が提案されてい
る。また、融点２１〜３５℃、３５ｃａｌ／ｇ以上の蓄
熱量を有するトリメチロールエタン水和物の蓄熱材も提
案されている（特開昭６３−１０１４７３号公報）。On the other hand, as a heat medium, a method of using a latent heat storage material in which a low-temperature latent heat storage material is dispersed and mixed in water is being studied. For example, a method of using paraffin as an o / w type emulsion and using it as a slurry, a method of using paraffin as microcapsules, and a method of using a low-cost inorganic hydrate as a latent heat storage material have been proposed. Further, a heat storage material of trimethylolethane hydrate having a melting point of 21 to 35 ° C. and a heat storage amount of 35 cal / g or more has also been proposed (JP-A-63-101473).
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、パラフ
ィンを用いる方法については、パラフィンの価格が高
く、又、マイクロカプセルの作製コストも高いため、実
用化が難しく、また、無機水和物を用いる場合、配管へ
の腐食の問題があり、実現が難しい。一方、金属に対す
る腐食性は小さいと思われるトリメチロールエタン水和
物系の蓄熱材については、冷媒としての具体的な使用方
法がこれ迄知られていない。本発明は、エマルジョン化
又はマイクロカプセル化する必要がなく、配管への腐食
もなく、且つ融点が０〜２０℃の範囲のトリメチロール
メタン系潜熱蓄冷材の使用方法を提供することを目的と
する。However, the method using paraffin is difficult to put into practical use because the price of paraffin is high and the production cost of microcapsules is high, and when an inorganic hydrate is used, There is a problem of corrosion on the piping, which is difficult to realize. On the other hand, a specific method of using a trimethylolethane hydrate-based heat storage material, which is considered to be less corrosive to metals, as a refrigerant has not been known. An object of the present invention is to provide a method for using a trimethylolmethane-based latent heat storage material having no necessity of emulsification or microencapsulation, corrosion of piping, and a melting point of 0 to 20 ° C. .
【０００５】[0005]
【課題を解決するための手段】本発明者らは、かかる事
情に鑑み鋭意検討した結果、トリメチロールエタン及び
水、又はトリメチロールエタン、尿素及び水を特定の割
合で配合した潜熱蓄冷材は、融点が０〜２０℃近辺であ
り、配管への腐食も小さく、且つスラリー状であるため
搬送可能であることを見出し、本発明を完成するに至っ
た。Means for Solving the Problems The inventors of the present invention have conducted intensive studies in view of such circumstances, and as a result, a latent heat storage material containing trimethylolethane and water, or trimethylolethane, urea and water in a specific ratio, It has been found that the melting point is around 0 to 20 ° C., the corrosion to the pipe is small, and the slurry is in a state of being transportable, and the present invention has been completed.
【０００６】即ち、本発明の要旨は、トリメチロールエ
タン１３〜２９重量％を含有する水溶液を０℃以上、２
０℃以下で熱輸送媒体として使用することを特徴とする
熱輸送媒体の使用方法、にある。That is, the gist of the present invention is to provide an aqueous solution containing 13 to 29% by weight of trimethylolethane at 0 ° C. or higher,
A method for using the heat transport medium, wherein the heat transport medium is used at a temperature of 0 ° C. or lower.
【０００７】[0007]
【発明の実施の形態】本発明の方法は、特定割合のトリ
メチロールエタン含有水溶液又は特定割合のトリメチロ
ールエタン及び尿素含有水溶液をスラリー状の熱輸送媒
体として使用することを特徴とする。次に、トリメチロ
ールエタンと水との相図（図−１）に基づき、本発明の
概念を説明する。なお、この相図は、本発明者らが初め
て作成したものであり、トリメチロールエタンの含有量
と融点との関係は今迄知られていなかったものである。DESCRIPTION OF THE PREFERRED EMBODIMENTS The method of the present invention is characterized in that a specific proportion of an aqueous solution containing trimethylolethane or a specific proportion of an aqueous solution containing trimethylolethane and urea is used as a heat transport medium in the form of a slurry. Next, the concept of the present invention will be described based on a phase diagram of trimethylolethane and water (FIG. 1). This phase diagram was created by the present inventors for the first time, and the relationship between the content of trimethylolethane and the melting point was not known until now.
【０００８】相図からトリメチロールエタンの割合によ
って、ＴＭＥ四水和物を主たる成分とする０℃より高い
融点ピーク１と水を主成分とする０℃以下の融点ピーク
２が存在することが分る。熱媒体を５℃まで冷却した場
合、融点ピーク１の成分は凝固し潜熱を蓄える。一方、
５℃では融点ピーク２は液体であるので、融点ピーク２
の成分を媒体とした熱搬送が可能となる。即ち、本発明
のポイントは、このように所定の温度で凝固する成分と
液体である成分を機能別に利用することにある。From the phase diagram, it can be seen that, depending on the proportion of trimethylolethane, a melting point peak 1 higher than 0 ° C. mainly containing TME tetrahydrate and a melting point peak 2 lower than 0 ° C. mainly containing water exist. You. When the heating medium is cooled to 5 ° C., the component having the melting point peak 1 solidifies and stores latent heat. on the other hand,
At 5 ° C., melting point peak 2 is a liquid, so melting point peak 2
The heat transfer using the component as a medium becomes possible. That is, the point of the present invention resides in utilizing the components that solidify at a predetermined temperature and the components that are liquids according to their functions.
【０００９】トリメチロールエタンの配合割合は、熱輸
送媒体主成分のトリメチロールエタンと水との合計量に
対して、１３〜２９重量％、好ましくは１５〜２３重量
％である。トリメチロールエタンの含有量が１３重量％
より少ないと融点ピーク１が０℃以下に低下し、２９重
量％より多いと融点ピーク１が２０℃を超え、融点ピー
ク２及び／又は３の成分が少なくなり搬送できなくなる
ので好ましくない。The mixing ratio of trimethylolethane is 13 to 29% by weight, preferably 15 to 23% by weight, based on the total amount of trimethylolethane, which is the main component of the heat transport medium, and water. Trimethylolethane content of 13% by weight
If the amount is less than this, the melting point peak 1 drops to 0 ° C. or less, and if it is more than 29% by weight, the melting point peak 1 exceeds 20 ° C., and the components of the melting point peaks 2 and / or 3 become undesirably unconveyable.
【００１０】更に、トリメチロールエタンと水の組成物
に尿素を配合するとトリメチロールエタンの融点は低下
する。尿素を配合すると−１２℃付近に融点ピーク３が
現れる。トリメチロールエタン四水和物に尿素を加えて
いくと融点が低下する。また、トリメチロールエタン４
０重量％、尿素３０重量％、水３０重量％の組成物は１
３℃に共晶点を有する。Further, when urea is added to the composition of trimethylolethane and water, the melting point of trimethylolethane decreases. When urea is added, a melting point peak 3 appears around -12 ° C. As urea is added to trimethylolethane tetrahydrate, the melting point decreases. Also, trimethylolethane 4
The composition of 0% by weight, 30% by weight of urea and 30% by weight of water is 1%.
It has a eutectic point at 3 ° C.
【００１１】なお、尿素の配合量は、この場合の熱輸送
媒体主成分であるトリメチロールエタンと尿素と水との
合計量に対して、１〜３０重量％、好ましくは１〜２５
重量％である。尿素の配合量が１重量％より少ないと融
点ピーク１の融点降下の効果が得られず、３０重量％よ
り多いと融点ピーク１が０℃以下に低下するので好まし
くない。The amount of urea is from 1 to 30% by weight, preferably from 1 to 25% by weight, based on the total amount of trimethylolethane, urea and water, which are the main components of the heat transport medium.
% By weight. If the blending amount of urea is less than 1% by weight, the effect of lowering the melting point of melting point peak 1 cannot be obtained.
【００１２】本発明に用いられる熱輸送媒体には、必要
に応じて上記成分以外の添加剤を使用することができ
る。例えば、増粘剤を配合してもよい。使用できる増粘
剤の種類としては、水不溶性吸水性ポリマー、ポリアク
リル酸ナトリウム、ポリアクリルアミド、ポリグリセリ
ン、カルボキシメチルセルロース、ヒドロキシエチルセ
ルロース、ポリビニルアルコール、アルギン酸塩、キサ
ンタンガム、カラーギナン、ゼラチン、寒天等が挙げら
れるがこれに限定されることはない。これら増粘剤の配
合量はトリメチロールエタンと水、又はトリメチロール
エタンと水と尿素からなる蓄熱材主成分１００重量部に
対して０．０１〜１重量部である。また、フェノール
類、アミン類、ヒドロキシアミン類等の酸化防止剤、ク
ロム酸塩、ポリリン酸塩、亜硝酸ナトリウム等の金属腐
食防止剤、安息香酸ナトリウムや２，６−ジ−ｔ−ブチ
ルヒドロキシトルエン等の防腐剤、流動抵抗を軽減する
ための界面活性剤を使用することができる。In the heat transport medium used in the present invention, additives other than the above components can be used, if necessary. For example, a thickener may be blended. Examples of thickeners that can be used include water-insoluble water-absorbing polymers, sodium polyacrylate, polyacrylamide, polyglycerin, carboxymethylcellulose, hydroxyethylcellulose, polyvinyl alcohol, alginate, xanthan gum, carrageenan, gelatin, agar, and the like. However, it is not limited to this. The compounding amount of these thickeners is 0.01 to 1 part by weight based on 100 parts by weight of the main component of the heat storage material composed of trimethylolethane and water, or trimethylolethane, water and urea. Also, antioxidants such as phenols, amines and hydroxyamines, metal corrosion inhibitors such as chromates, polyphosphates and sodium nitrite, sodium benzoate and 2,6-di-t-butylhydroxytoluene Preservatives such as the above, and a surfactant for reducing flow resistance can be used.
【００１３】更に、過冷却を防止するために、過冷却防
止剤を添加してもよい。過冷却防止剤としては、例えば
硫酸カルシウム、硫酸カルシウム半水塩、硫酸カルシウ
ム二水塩、炭酸ナトリウム、炭酸ナトリウム一水塩、ピ
ロリン酸ナトリウム、ピロリン酸ナトリウム十水塩、硫
酸ナトリウム、硫酸ナトリウム十水塩及び第三リン酸カ
ルシウム等が挙げられる。これらの中、硫酸カルシウム
二水塩、炭酸ナトリウムが好ましい。なお、過冷却防止
剤の配合量は、熱輸送媒体主成分１００重量部に対し
て、通常、０．１〜１０重量部、好ましくは０．５〜５
重量部である。Further, in order to prevent supercooling, a supercooling inhibitor may be added. Examples of the supercooling inhibitor include calcium sulfate, calcium sulfate hemihydrate, calcium sulfate dihydrate, sodium carbonate, sodium carbonate monohydrate, sodium pyrophosphate, sodium pyrophosphate decahydrate, sodium sulfate, and sodium sulfate decahydrate. Salts and tribasic calcium phosphate. Of these, calcium sulfate dihydrate and sodium carbonate are preferred. The amount of the supercooling inhibitor is usually 0.1 to 10 parts by weight, preferably 0.5 to 5 parts by weight, based on 100 parts by weight of the heat transport medium main component.
Parts by weight.
【００１４】本発明に用いられる熱輸送媒体組成物の調
合方法は、特に限定されないが、トリメチロールエタン
と水又はトリメチロールエタンと水と尿素とその他の添
加剤を混合して均一に分散させればよい。より均一に分
散させるためには、熱輸送媒体組成物を通常４０〜５０
℃まで加熱し、撹拌混合する方法が挙げられる。The method for preparing the heat transport medium composition used in the present invention is not particularly limited, but trimethylolethane and water or trimethylolethane, water, urea and other additives are mixed and uniformly dispersed. I just need. In order to disperse more uniformly, the heat transport medium composition is usually 40 to 50.
And stirring and mixing.
【００１５】[0015]
【実施例】以下、実施例により本発明を更に詳細に説明
するが、本発明はその要旨を超えない限り、以下の実施
例に限定されるものではない。 実施例１〜５、比較例１〜２ トリメチロールエタン（東京化成工業社製試薬）と水
（純水）を表−１に示す重量で配合し熱輸送媒体を得
た。得られた熱輸送媒体を示差走査熱量計（セイコー電
子工業社製ＤＳＣ２２０Ｃ）にて、２℃／分で−５０℃
まで冷却し、２℃／分で４０℃まで昇温させたときの融
解温度を測定した。測定結果を表−１に示す。トリメチ
ロールエタンの配合量が１５〜２５重量％では融点ピー
ク１は６．５〜１８．２℃であった。トリメチロールエ
タンの配合量が１０重量％では融点ピーク１が−２．０
℃、３０重量％では２２℃となり目標を外れることが分
かる。EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the present invention is limited to the following Examples without departing from the scope of the invention. Examples 1 to 5 and Comparative Examples 1 and 2 Trimethylolethane (a reagent manufactured by Tokyo Chemical Industry Co., Ltd.) and water (pure water) were blended at the weights shown in Table 1 to obtain a heat transport medium. The obtained heat transport medium was measured at 2 ° C./min at −50 ° C. using a differential scanning calorimeter (DSC220C manufactured by Seiko Instruments Inc.).
And the melting temperature was measured when the temperature was raised to 40 ° C. at 2 ° C./min. Table 1 shows the measurement results. When the blending amount of trimethylolethane was 15 to 25% by weight, the melting point peak 1 was 6.5 to 18.2 ° C. When the blending amount of trimethylolethane is 10% by weight, the melting point peak 1 is -2.0.
At 30 ° C. and 30% by weight, the temperature was 22 ° C., deviating from the target.
【００１６】実施例６〜１２、比較例３ トリメチロールエタン、尿素（東京化成工業社製試薬）
と水（純水）を表−２に示す重量で配合した以外は実施
例１と同様に行った。表−２から、実施例６〜１２は何
れも融点ピーク１が７．８〜１９．５℃であり、融点ピ
ーク２と融点ピーク３の成分により５℃以上で液体成分
が存在し、熱搬送が可能であることが分かる。比較例３
は融点ピーク１及び２が存在せず、融点ピーク３の−１
２．３℃だけであった。Examples 6 to 12, Comparative Example 3 Trimethylolethane, urea (reagents manufactured by Tokyo Chemical Industry Co., Ltd.)
And water (pure water) were blended in the weights shown in Table 2 in the same manner as in Example 1. From Table-2, in all of Examples 6 to 12, the melting point peak 1 is 7.8 to 19.5 ° C, and the liquid component exists at 5 ° C or more due to the components of the melting point peak 2 and the melting point peak 3; It turns out that is possible. Comparative Example 3
Indicates that the melting point peaks 1 and 2 are absent and that the melting point peak 3 is -1.
2.3 ° C only.
【００１７】[0017]
【表１】 [Table 1]
【００１８】[0018]
【表２】 [Table 2]
【００１９】[0019]
【発明の効果】本発明によれば、融点が０〜２０℃の範
囲にあり、配管への腐食もなく、且つスラリー状で搬送
可能であるトリメチロールエタン系潜熱蓄熱材組成物を
熱輸送媒体として使用する方法が得られる。According to the present invention, a trimethylolethane-based latent heat storage material composition which has a melting point in the range of 0 to 20 ° C., does not corrode pipes, and can be transported in a slurry state is used as a heat transport medium. Is obtained.
【図１】トリメチロールエタンと水との相図。FIG. 1 is a phase diagram of trimethylolethane and water.
Claims (2)
を含有する水溶液を０℃以上、２０℃以下で熱輸送媒体
として使用することを特徴とする熱輸送媒体の使用方
法。1 to 13% by weight of trimethylolethane
A method for using a heat transport medium, characterized in that an aqueous solution containing is used as a heat transport medium at 0 ° C or more and 20 ° C or less.
９重量％の外に、尿素１〜３０重量％を含有することを
特徴とする請求項１に記載の熱輸送媒体の使用方法。2. An aqueous solution comprising trimethylolethane 13-2.
The method for using a heat transport medium according to claim 1, wherein urea is contained in an amount of 1 to 30% by weight in addition to 9% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11208902A JP2001031958A (en) | 1999-07-23 | 1999-07-23 | Method for using heat transport medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11208902A JP2001031958A (en) | 1999-07-23 | 1999-07-23 | Method for using heat transport medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001031958A true JP2001031958A (en) | 2001-02-06 |
Family
ID=16564027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11208902A Pending JP2001031958A (en) | 1999-07-23 | 1999-07-23 | Method for using heat transport medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001031958A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002263470A (en) * | 2001-03-09 | 2002-09-17 | Nkk Corp | Apparatus for manufacturing slurry of hydrate |
| JP2008238169A (en) * | 2001-05-30 | 2008-10-09 | Jfe Engineering Kk | Method of adjusting concentration of solution containing hydrate slurry producing agent, and method of supplying hydrate slurry producing agent |
| JP2017036350A (en) * | 2015-08-06 | 2017-02-16 | パナソニックＩｐマネジメント株式会社 | Latent heat cold storage material |
-
1999
- 1999-07-23 JP JP11208902A patent/JP2001031958A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002263470A (en) * | 2001-03-09 | 2002-09-17 | Nkk Corp | Apparatus for manufacturing slurry of hydrate |
| JP4599733B2 (en) * | 2001-03-09 | 2010-12-15 | Ｊｆｅエンジニアリング株式会社 | Hydrate slurry production equipment |
| JP2008238169A (en) * | 2001-05-30 | 2008-10-09 | Jfe Engineering Kk | Method of adjusting concentration of solution containing hydrate slurry producing agent, and method of supplying hydrate slurry producing agent |
| JP2009106937A (en) * | 2001-05-30 | 2009-05-21 | Jfe Engineering Corp | Supply method of hydrate slurry forming agent |
| JP2017036350A (en) * | 2015-08-06 | 2017-02-16 | パナソニックＩｐマネジメント株式会社 | Latent heat cold storage material |
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