JPH0212269B2 - - Google Patents
Info
- Publication number
- JPH0212269B2 JPH0212269B2 JP57056629A JP5662982A JPH0212269B2 JP H0212269 B2 JPH0212269 B2 JP H0212269B2 JP 57056629 A JP57056629 A JP 57056629A JP 5662982 A JP5662982 A JP 5662982A JP H0212269 B2 JPH0212269 B2 JP H0212269B2
- Authority
- JP
- Japan
- Prior art keywords
- parts
- liquid
- activated carbon
- caramel
- heat
- 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 65
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical group CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 61
- 239000007788 liquid Substances 0.000 claims description 42
- 235000013736 caramel Nutrition 0.000 claims description 26
- MIDXCONKKJTLDX-UHFFFAOYSA-N 3,5-dimethylcyclopentane-1,2-dione Chemical group CC1CC(C)C(=O)C1=O MIDXCONKKJTLDX-UHFFFAOYSA-N 0.000 claims description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 239000002270 dispersing agent Substances 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 11
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 10
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 10
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 description 19
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 8
- 239000008103 glucose Substances 0.000 description 8
- 239000002612 dispersion medium Substances 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
- 239000000843 powder Substances 0.000 description 7
- 235000000346 sugar Nutrition 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 6
- 239000006229 carbon black Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 238000002834 transmittance Methods 0.000 description 6
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 239000006096 absorbing agent Substances 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- -1 glucose and sugar Chemical class 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- JLPULHDHAOZNQI-ZTIMHPMXSA-N 1-hexadecanoyl-2-(9Z,12Z-octadecadienoyl)-sn-glycero-3-phosphocholine Chemical compound CCCCCCCCCCCCCCCC(=O)OC[C@H](COP([O-])(=O)OCC[N+](C)(C)C)OC(=O)CCCCCCC\C=C/C\C=C/CCCCC JLPULHDHAOZNQI-ZTIMHPMXSA-N 0.000 description 2
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 235000011187 glycerol Nutrition 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 229920000191 poly(N-vinyl pyrrolidone) Polymers 0.000 description 2
- 229940083466 soybean lecithin Drugs 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 2
- CONKBQPVFMXDOV-QHCPKHFHSA-N 6-[(5S)-5-[[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]methyl]-2-oxo-1,3-oxazolidin-3-yl]-3H-1,3-benzoxazol-2-one Chemical group C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)C[C@H]1CN(C(O1)=O)C1=CC2=C(NC(O2)=O)C=C1 CONKBQPVFMXDOV-QHCPKHFHSA-N 0.000 description 1
- 229920003081 Povidone K 30 Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000007798 antifreeze agent Substances 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000004042 decolorization Methods 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- ALDITMKAAPLVJK-UHFFFAOYSA-N prop-1-ene;hydrate Chemical group O.CC=C ALDITMKAAPLVJK-UHFFFAOYSA-N 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 150000008163 sugars Chemical class 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
- 235000005074 zinc chloride Nutrition 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
Description
【発明の詳細な説明】
本発明は太陽熱による温水器及び集熱器の吸熱
体として有用な液状組成物に関するものであつ
て、その目的とするところは吸熱性にすぐれ、且
つ長期間にわたつて安定して使用することができ
る太陽熱吸熱用液体を提供することにある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid composition useful as a heat absorbing body for solar water heaters and heat collectors. The object of the present invention is to provide a liquid for absorbing solar heat that can be stably used.
従来、黒色の液体を太陽光線にあて、太陽熱を
吸収させ、次いで熱交換により通常の水道水を昇
温させ、家庭用や工業的用途に使用することは公
知である。このような液状の吸熱体としては、黒
色の染料を水に溶解したもの、黒色の顔料等を水
中に分散させたもの等が使用されているが、染料
を使用したものは長時間の光に対する安定性に劣
り実用的ではない。一方カーボンブラツク等の黒
色顔料を使用したものは、光に対する安定性はす
ぐれているが、長期間の使用の場合、例えばカー
ボンブラツクを分散剤により水中に分散させたも
のを温水器及び集熱器のパイプ中に流し、太陽熱
を吸熱させ、次いで熱交換器により水道水を昇温
させる場合は、分散しているカーボンブラツクが
パイプ内面に析出沈着し熱吸収率等が低下し、ま
た長期間の繰返しの温度変化や太陽光の影響によ
り分散安定性が低下するためカーボンブラツクが
沈澱し、吸熱体としての性能が失われるという欠
点がある。 It is conventionally known to expose a black liquid to the sun's rays to absorb solar heat, and then use heat exchange to raise the temperature of ordinary tap water for use in domestic or industrial applications. As such liquid heat absorbers, black dyes dissolved in water or black pigments dispersed in water are used, but those using dyes are resistant to long-term light exposure. It is not practical due to poor stability. On the other hand, products using black pigments such as carbon black have excellent stability against light, but for long-term use, for example, carbon black dispersed in water with a dispersant may be used in water heaters and heat collectors. When tap water is poured into a pipe to absorb solar heat and then heated by a heat exchanger, the dispersed carbon black deposits on the inner surface of the pipe, reducing the heat absorption rate, etc. Dispersion stability deteriorates due to repeated temperature changes and the influence of sunlight, resulting in precipitation of carbon black, which has the disadvantage of losing its performance as a heat absorber.
本発明者等は、上述の如き従来の吸熱用液体の
欠点を解決すべく鋭意研究の結果、吸熱用黒色材
料として特定の材料を選択し、且つ特定の分散剤
と分散媒体とを組合せて使用することにより、上
述の従来技術の欠点が解決された吸熱用液体が得
られることを知見して本発明を完成した。 As a result of intensive research to solve the drawbacks of conventional heat-absorbing liquids as described above, the present inventors selected a specific material as a heat-absorbing black material, and used a specific dispersant and dispersion medium in combination. The present invention was completed based on the finding that by doing so, a heat-absorbing liquid that solved the drawbacks of the above-mentioned prior art could be obtained.
すなわち、本発明は、分散用媒体、分散剤およ
び黒色材料からなる太陽熱吸熱用液体において、
分散媒体がプロピレングリコール、または水とプ
ロピレングリコールとの混合物であり、分散剤が
カラメルまたはカラメルとポリビニルピロリドン
との混合物であり、且つ黒色材料が粉末状活性炭
であることを特徴とする太陽熱吸熱用液体であ
る。 That is, the present invention provides a solar heat absorbing liquid comprising a dispersion medium, a dispersant, and a black material,
A liquid for solar heat absorption, characterized in that the dispersion medium is propylene glycol or a mixture of water and propylene glycol, the dispersant is caramel or a mixture of caramel and polyvinylpyrrolidone, and the black material is powdered activated carbon. It is.
次に本発明を更に詳細に説明すると、本発明の
液状組成物を構成する成分の使用割合は、液体組
成物100重量部中、粉末状活性炭は約0.001〜10重
量部割合、好ましくは約0.01〜２重量部割合であ
り、この範囲の下限以下の量になると太陽熱の吸
収が不十分となり、一方、その上限を越えると太
陽光線が液の内部に届かず、熱吸収が不十分とな
る。分散剤は約0.001〜30重量部割合、好ましく
は約0.5〜10重量部の割合であり、この範囲の下
限以下の量になると活性炭粉末の分散安定性が低
下する。一方、その上限を越えると粘度が高くな
りすぎ、熱交換の効率が低下することになる。分
散媒体は主として粉末状活性炭と分散剤の残りの
重量部であり、約70重量部割合以上、好ましくは
約93重量部割合以上で使用する。この範囲の下限
以下では得られる吸熱用液体の粘度や濃度が高く
なりすぎ、すでに述べたように熱交換の効率が低
下したり熱吸収率が不十分となる。 Next, to explain the present invention in more detail, the proportion of the components constituting the liquid composition of the present invention is about 0.001 to 10 parts by weight of powdered activated carbon, preferably about 0.01 parts by weight, based on 100 parts by weight of the liquid composition. -2 parts by weight, and if the amount is below the lower limit of this range, absorption of solar heat will be insufficient, while if it exceeds the upper limit, solar rays will not reach the interior of the liquid and heat absorption will be insufficient. The dispersant is used in an amount of about 0.001 to 30 parts by weight, preferably about 0.5 to 10 parts by weight, and if the amount is below the lower limit of this range, the dispersion stability of the activated carbon powder will decrease. On the other hand, if the upper limit is exceeded, the viscosity becomes too high and the efficiency of heat exchange decreases. The dispersion medium is mainly powdered activated carbon and the remaining parts by weight of the dispersant, and is used in an amount of about 70 parts by weight or more, preferably about 93 parts by weight or more. Below the lower limit of this range, the viscosity and concentration of the resulting endothermic liquid will become too high, resulting in reduced heat exchange efficiency and insufficient heat absorption rate, as described above.
本発明で使用する活性炭は、有機物質を炭化し
て得られるもので、従来は脱色、脱臭、吸着、触
媒等として使用されているものであり、着色剤や
充填剤として使用されている各種のカーボンブラ
ツクとは、その粒子構造が異なるものである。こ
のような活性炭は、塩化亜鉛法、水蒸気法等、い
ずれの製造方法によるものでもよいが、その粒径
は約10μ以下、好ましくは約5μ以下である必要が
ある。このような粉末状活性炭は、市販の粉状活
性炭や粉末活性炭を通常の粉砕機により粉砕する
か、あるいはその分散処理時に分散と同時に磨砕
し、その粒径を調整することにより、容易に得る
ことができる。 The activated carbon used in the present invention is obtained by carbonizing organic substances, and has conventionally been used for decolorization, deodorization, adsorption, catalysts, etc., and it can also be used as a coloring agent or filler. Carbon black differs in its particle structure. Such activated carbon may be produced by any method such as the zinc chloride method or the steam method, but its particle size must be about 10 μm or less, preferably about 5 μm or less. Such powdered activated carbon can be easily obtained by pulverizing commercially available powdered activated carbon or powdered activated carbon using a normal pulverizer, or by grinding it at the same time as dispersion and adjusting the particle size. be able to.
本発明で使用する分散剤はカラメルであり、カ
ラメルとは、ブドウ糖や砂糖などの糖類を熱処理
して得られる物質であつて焦糖とも呼ばれ、従来
は天然着色料として広く使用されているものであ
る。例えば、ブドウ糖製粉末カラメル、ブドウ糖
製液状カラメル、砂糖製液状カラメル、粉末カラ
メル、特殊液状カラメル、固形カラメル等があ
り、これらのカラメルは仙波糖化工業等により広
く市販されている。本発明者は粉末活性炭を前記
の如き特定の媒体中に均一安定に分散させる分散
剤について広汎な研究の結果、このようなカラメ
ルが最適であることを知見したものである。本発
明では、このようなカラメルともにポリビニルピ
ロリドンも分散剤として併用し得ることを見い出
した。ポリビニルピロリドンは、例えばその平均
分子量が約5000程度から約500000程度の種々のも
のが知られており、これらの公知のポリビニルピ
ロリドンはいずれも本発明において使用すること
ができる。このようなポリビニルピロリドンは従
来から顔料等の分散剤（保護コロイド）として良
く知られたものであるが、活性炭粉末をプロピレ
ングリコール、または水−プロピレングリコール
中に安定に分散させる分散剤としては知られてい
ない。これらのポリビニルピロリドンはカラメル
100重量部あたり約10〜200重量部の割合で使用す
るのが好ましい。 The dispersing agent used in the present invention is caramel, and caramel is a substance obtained by heat-treating sugars such as glucose and sugar, and is also called scorched sugar, and has traditionally been widely used as a natural coloring agent. It is. Examples include powdered caramel made from glucose, liquid caramel made from glucose, liquid caramel made from sugar, powdered caramel, special liquid caramel, solid caramel, etc., and these caramels are widely marketed by Senba Toka Kogyo and others. As a result of extensive research into dispersants for uniformly and stably dispersing powdered activated carbon in the above-mentioned specific medium, the inventors of the present invention discovered that such a caramel is optimal. In the present invention, it has been discovered that polyvinylpyrrolidone can be used in combination with such caramel as a dispersant. Various types of polyvinylpyrrolidone are known, for example, having an average molecular weight of about 5,000 to about 500,000, and any of these known polyvinylpyrrolidones can be used in the present invention. Such polyvinylpyrrolidone has long been well known as a dispersant (protective colloid) for pigments, etc., but it is not known as a dispersant for stably dispersing activated carbon powder in propylene glycol or water-propylene glycol. Not yet. These polyvinylpyrrolidone caramel
Preferably, it is used in a proportion of about 10 to 200 parts by weight per 100 parts by weight.
本発明で使用する分散媒体は、前述の通り、プ
ロピレングリコール、または水とプロピレングリ
コールとの混合物であり、このような分散媒体に
おいて初めて活性炭粉末が前記の分散剤により良
好且つ安定に分散し得ることを知見したものであ
る。プロピレングリコールは分散媒体であるとと
もに分散助剤および冬期使用時の凍結防止剤とし
ても機能するものであり、水との混合物である場
合は、少なくとも約15％のプロピレングリコール
が存在するべきである。 As mentioned above, the dispersion medium used in the present invention is propylene glycol or a mixture of water and propylene glycol, and it is only in such a dispersion medium that the activated carbon powder can be well and stably dispersed by the dispersant. This is what we discovered. Propylene glycol serves as a dispersion medium as well as a dispersion aid and anti-freeze agent for winter use; when mixed with water, at least about 15% propylene glycol should be present.
本発明の吸熱用液体の必須成分は上述の通りで
あるが、その他各種の水溶性高分子物の乳化剤、
安定剤、防腐剤、防錆剤等の各種の添加剤を必要
に応じて添加することができる。 The essential components of the endothermic liquid of the present invention are as described above, and in addition, various water-soluble polymer emulsifiers,
Various additives such as stabilizers, preservatives, and rust preventives can be added as necessary.
本発明の吸熱用液体は、上述の成分を配合し、
これを通常の分散機、例えばボールミル、ホモミ
キサー、アトライター、サンドミル、コロイドミ
ル、ロール等の分散機により分散処理することに
より容易に調製することができる。このようにし
て得られた本発明の吸熱用液体は、均一な黒色の
液体であり、太陽熱温水器及び集熱器の吸熱用液
体として有用なものである。すなわち、このよう
な用途においては長期間にわたつて無数回の昇
温、降温を繰返すものであり、また太陽光線に常
時（昼間）さらされるものであるが、このような
過酷な条件下で長期間良好な分散安定性を保持す
ることができる。更に、従来のカーボンブラツク
を使用した場合は、そのカーボンブラツクが温水
器及び集熱器のパイプ等の循環機器の内面に析出
沈着し、熱吸収性や熱交換性を著しく減少する傾
向があるのに対し、本発明の吸熱用液体はこのよ
うな傾向を殆んど示すことがない。このような性
能は活性炭の本来の物性からして全然予期し得な
いものであつた。更に本発明の吸熱用液体はイオ
ン性の成分を含有しないため、温水器及び集熱器
の金属部分を腐蝕することもない。 The endothermic liquid of the present invention blends the above-mentioned components,
This can be easily prepared by dispersing it using a conventional dispersing machine such as a ball mill, homomixer, attritor, sand mill, colloid mill, roll, or the like. The heat-absorbing liquid of the present invention thus obtained is a uniform black liquid and is useful as a heat-absorbing liquid for solar water heaters and heat collectors. In other words, in such applications, the temperature is raised and lowered countless times over a long period of time, and is constantly exposed to sunlight (during the day). Good dispersion stability can be maintained for a long period of time. Furthermore, when conventional carbon black is used, it tends to deposit on the inner surfaces of circulation equipment such as water heaters and heat collector pipes, significantly reducing heat absorption and heat exchange performance. On the other hand, the endothermic liquid of the present invention hardly exhibits such a tendency. Such performance was completely unexpected in view of the original physical properties of activated carbon. Furthermore, since the heat-absorbing liquid of the present invention does not contain ionic components, it does not corrode metal parts of water heaters and heat collectors.
次に実施例をあげて本発明を更に具体的に説明
する。なお、文中、部または％とあるのは重量基
準である。 Next, the present invention will be explained in more detail with reference to Examples. Note that parts and percentages in the text are based on weight.
実施例 １
活性炭（二村化学工業社製、商品名太閤Ｙ）５
部、ブドウ糖製粉末カラメル（仙波糖化工業社
製、商品名Ｓ−Ｗ）５部、プロピレングリコール
50部および水40部を配合し、サンドミルにより分
散処理し活性炭の粒径が5μ以下の分散体を作成
した。Example 1 Activated carbon (manufactured by Nimura Chemical Industry Co., Ltd., trade name Taiko Y) 5
5 parts, glucose powder caramel (manufactured by Senba Toka Kogyo Co., Ltd., trade name S-W), propylene glycol
50 parts of activated carbon and 40 parts of water were blended and dispersed using a sand mill to create a dispersion in which the particle size of activated carbon was 5 μm or less.
この分散体１部、水60部、プロピレングリコー
ル35部、および上記ブドウ糖製、粉末カラメル４
部を均一に混合撹拌し、凍結点−15℃の吸熱用液
体を得た。 1 part of this dispersion, 60 parts of water, 35 parts of propylene glycol, and 4 parts of the above-mentioned glucose powder caramel.
The mixture was uniformly mixed and stirred to obtain an endothermic liquid with a freezing point of -15°C.
この液体を80℃で６ケ月連続加熱処理した後、
顕微鏡により活性炭の分散性を調べたところ加熱
前と同様に良好であつた。 After continuously heating this liquid at 80℃ for 6 months,
When the dispersibility of the activated carbon was examined using a microscope, it was found to be as good as before heating.
実施例 ２
活性炭（二村化学工業社製、商品名太閤Ｋ）５
部、砂糖製粉末カラメル（仙波糖化工業社製、商
品名KS−Ｗ）５部、プロピレングリコール50部、
および水40部を混合し、サンドミルで活性炭の粒
径が5μ以下になるまで分散処理し、分散体を作
成した。Example 2 Activated carbon (manufactured by Nimura Chemical Industry Co., Ltd., trade name Taiko K) 5
5 parts, powdered sugar caramel (manufactured by Senba Toka Kogyo Co., Ltd., trade name KS-W), 50 parts of propylene glycol,
and 40 parts of water were mixed and dispersed in a sand mill until the particle size of the activated carbon became 5μ or less to prepare a dispersion.
この分散体１部、プロピレングリコール35部、
上記砂糖製粉末カラメル２部および水62部を混合
撹拌し、吸熱用液体を得た。この液体を60℃で６
ケ月ガラス管中を強制循環させた後、活性炭の分
散性を確認するため、水で25倍に希釈し、分光光
度計で透過率を測定したところ、強制循環前の液
体（25倍希釈）の透過率曲線と一致し、強制循環
しても、分散安定性は良好であつた。また、ガラ
ス管の内壁に活性炭の折出沈着は全く認められな
かつた。 1 part of this dispersion, 35 parts of propylene glycol,
Two parts of the above powdered sugar caramel and 62 parts of water were mixed and stirred to obtain an endothermic liquid. This liquid at 60℃
After forced circulation in the glass tube, in order to check the dispersibility of the activated carbon, it was diluted 25 times with water and the transmittance was measured using a spectrophotometer. The dispersion stability matched the transmittance curve and was good even with forced circulation. Further, no activated carbon was observed to be deposited on the inner wall of the glass tube.
実施例 ３
活性炭（二村化学工業社製、商品名太閤Ｗ）５
部、ブドウ糖製粉末カラメル（仙波糖化工業社
製、商品名Ｍ−Ｗ）５部、ポリビニルピロリドン
（BASF社製、商品名コリドン30）５部、プロピ
レングリコール20部および水65部を混合し、ボー
ルミルで、活性炭の粒径が5μ以下の分散体を得
た。Example 3 Activated carbon (manufactured by Nimura Chemical Industry Co., Ltd., trade name Taiko W) 5
1 part, 5 parts of glucose powder caramel (manufactured by Senba Toka Kogyo Co., Ltd., trade name M-W), 5 parts of polyvinylpyrrolidone (manufactured by BASF, trade name Kollidon 30), 20 parts of propylene glycol, and 65 parts of water were mixed, and the mixture was milled in a ball mill. Thus, a dispersion of activated carbon with a particle size of 5 μm or less was obtained.
この分散体１部、上記ブドウ糖製粉末カラメル
２部、ポリビニルピロリドン（BASF社製、商品
名コリドン90）１部、プロピレングリコール40部
および水56部を均一に混合し、吸熱用液体を得
た。 1 part of this dispersion, 2 parts of the above glucose powder caramel, 1 part of polyvinylpyrrolidone (manufactured by BASF, trade name: Kollidon 90), 40 parts of propylene glycol, and 56 parts of water were uniformly mixed to obtain an endothermic liquid.
この液体を内径５mmの蛇管に入れてその両端を
ゴム栓にて密栓し、温度63℃のフエードメーター
中で1000時間照射し活性炭の分散性を顕微鏡にて
調べたところ、照射前の分散性と変わらず良好で
あり、ガラス管内壁への活性炭の折出沈着も全く
生じなかつた。 This liquid was put into a flexible tube with an inner diameter of 5 mm, both ends of which were tightly closed with rubber stoppers, and the liquid was irradiated for 1000 hours in a fade meter at a temperature of 63℃.The dispersibility of activated carbon was examined using a microscope. The results were as good as the results, and no activated carbon was deposited on the inner wall of the glass tube.
実施例 ４
活性炭（二村化学工業社製、商品名太閤Ｙ）５
部、ブドウ糖製粉末カラメル（仙波糖化工業社
製、商品名Ｓ−Ｗ）５部、プロピレングリコール
90部を配合し、これをサンドミルにより分散処理
し、活性炭の粒径が5μ以下の分散体を作成した。Example 4 Activated carbon (manufactured by Nimura Chemical Industry Co., Ltd., trade name Taiko Y) 5
5 parts, glucose powder caramel (manufactured by Senba Toka Kogyo Co., Ltd., trade name S-W), propylene glycol
90 parts of the activated carbon were blended and dispersed using a sand mill to create a dispersion in which the activated carbon particle size was 5 μm or less.
この分散体１部、プロピレングリコール95部、
砂糖製液状カラメル（仙波糖化工業社製、商品名
KS−Ｓ）４部を均一に混合撹拌し、吸熱用液体
を得た。 1 part of this dispersion, 95 parts of propylene glycol,
Sugar liquid caramel (manufactured by Senba Toka Kogyo Co., Ltd., product name)
KS-S) were uniformly mixed and stirred to obtain an endothermic liquid.
この液体を80℃で６ケ月連続加熱処理した後、
顕微鏡により活性炭の分散性を調べたところ、加
熱前と同様に良好であつた。 After continuously heating this liquid at 80℃ for 6 months,
When the dispersibility of the activated carbon was examined using a microscope, it was found to be as good as before heating.
実施例 ５
上記実施例４における分散体１部、プロピレン
グリコール97部、ポリビニルピロリドン（BASF
社製、商品名コリドン15）２部を均一に混合撹拌
し、吸熱用液体を得た。Example 5 1 part of the dispersion in Example 4 above, 97 parts of propylene glycol, polyvinylpyrrolidone (BASF
2 parts of Kollidon 15) (manufactured by Co., Ltd., trade name) were uniformly mixed and stirred to obtain an endothermic liquid.
この液体を上記実施例４と同様に80℃で６ケ月
連続加熱処理した後、顕微鏡により活性炭の分散
性を調べたところ、加熱前と同様に良好であつ
た。 After this liquid was continuously heated at 80° C. for 6 months in the same manner as in Example 4, the dispersibility of activated carbon was examined using a microscope, and it was found to be as good as before heating.
実施例 ６
実施例１〜５の吸熱体を太陽熱温水器に入れ、
強制循環させながら６ケ月間の暴露試験を実施し
た後、この吸熱液体を水で25倍に稀釈し、分光光
度計（日立製作所社製330型）で透過率を測定し
たところ、図面に示すように、暴露前の液体（25
倍稀釈）の透過率曲線とほぼ一致し、暴露後も活
性炭の凝集はなく、安定した液体であつた。Example 6 The heat absorbers of Examples 1 to 5 were placed in a solar water heater,
After conducting an exposure test for 6 months under forced circulation, this endothermic liquid was diluted 25 times with water and the transmittance was measured using a spectrophotometer (model 330 manufactured by Hitachi), as shown in the drawing. to the liquid before exposure (25
The transmittance curve almost matched the transmittance curve of the liquid (diluted twice), and there was no agglomeration of activated carbon even after exposure, and the liquid remained stable.
比較例 １
実施例１のブドウ糖製粉末カラメル５部の代り
に分散剤としてグリセリンの脂肪酸エステル５部
を使用し、その他は実施例１と同様にして分散体
を作成した。Comparative Example 1 A dispersion was prepared in the same manner as in Example 1 except that 5 parts of fatty acid ester of glycerin was used as a dispersant instead of 5 parts of the glucose powder caramel of Example 1.
この分散体１部、水60部、プロピレングリコー
ル35部およびグリセリンの脂肪酸エステル４部を
均一に混合撹拌して凍結点15℃の吸熱用液体を得
た。 1 part of this dispersion, 60 parts of water, 35 parts of propylene glycol, and 4 parts of fatty acid ester of glycerin were uniformly mixed and stirred to obtain an endothermic liquid with a freezing point of 15°C.
この液体を80℃で連続加熱処理した結果15日間
で活性炭が凝集し、沈降してしまつた。 As a result of continuous heat treatment of this liquid at 80°C, the activated carbon coagulated and settled in 15 days.
比較例 ２
実施例１のブドウ糖製粉末カラメル５部の代り
に分散剤として大豆レシチン５部を使用し、、そ
の他は実施例１と同様にして分散体を作成した。Comparative Example 2 A dispersion was prepared in the same manner as in Example 1 except that 5 parts of soybean lecithin was used as a dispersant instead of 5 parts of the glucose powder caramel in Example 1.
この分散体１部、水60部、プロピレングリコー
ル35部および大豆レシチン４部を均一に混合撹拌
して凍結点15℃の吸熱用液体を得た。 1 part of this dispersion, 60 parts of water, 35 parts of propylene glycol and 4 parts of soybean lecithin were uniformly mixed and stirred to obtain an endothermic liquid with a freezing point of 15°C.
この液体を80℃で連続加熱処理した結果20日間
で活性炭が凝集し、沈降してしまつた。 As a result of continuous heat treatment of this liquid at 80°C, the activated carbon coagulated and settled in 20 days.
図面は吸熱液体の暴露前と暴露後の光の透過率
を示す線図である。
The figure is a diagram showing the light transmittance of an endothermic liquid before and after exposure.
Claims (1)
太陽熱吸熱用液体において、分散用媒体がプロピ
レングリコール、または水とプロピレングリコー
ルとの混合物であり、分散剤がカラメルまたはカ
ラメルとポリビニルピロリドンとの混合物であ
り、且つ黒色材料が粉末状活性炭であることを特
徴とする太陽熱吸熱用液体。1. In a solar heat absorbing liquid consisting of a dispersing medium, a dispersing agent, and a black material, the dispersing medium is propylene glycol or a mixture of water and propylene glycol, and the dispersing agent is caramel or a mixture of caramel and polyvinylpyrrolidone. , and the black material is powdered activated carbon.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57056629A JPS58174486A (en) | 1982-04-07 | 1982-04-07 | Endothermic liquid |
| US06/397,983 US4482467A (en) | 1981-07-14 | 1982-07-14 | Liquid for absorption of solar heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57056629A JPS58174486A (en) | 1982-04-07 | 1982-04-07 | Endothermic liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58174486A JPS58174486A (en) | 1983-10-13 |
| JPH0212269B2 true JPH0212269B2 (en) | 1990-03-19 |
Family
ID=13032592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57056629A Granted JPS58174486A (en) | 1981-07-14 | 1982-04-07 | Endothermic liquid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58174486A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4728880A (en) * | 1986-11-28 | 1988-03-01 | Eastman Kodak Company | Multiple voltage-pulsed corona charging with a single power supply |
| EP2404973B1 (en) | 2009-03-06 | 2018-09-12 | University of The Ryukyus | Solar light (heat) absorbing material, and heat absorber/storage material and solar light (heat) absorber/control material each comprising the solar light (heat) absorbing material |
-
1982
- 1982-04-07 JP JP57056629A patent/JPS58174486A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58174486A (en) | 1983-10-13 |
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