JP2006321949A - Paraffin-based latent heat-storing material composition - Google Patents
Paraffin-based latent heat-storing material composition Download PDFInfo
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- JP2006321949A JP2006321949A JP2005148351A JP2005148351A JP2006321949A JP 2006321949 A JP2006321949 A JP 2006321949A JP 2005148351 A JP2005148351 A JP 2005148351A JP 2005148351 A JP2005148351 A JP 2005148351A JP 2006321949 A JP2006321949 A JP 2006321949A
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- 239000000203 mixture Substances 0.000 title claims abstract description 35
- 239000012188 paraffin wax Substances 0.000 title claims abstract description 28
- 239000000463 material Substances 0.000 title abstract description 6
- NDJKXXJCMXVBJW-UHFFFAOYSA-N heptadecane Chemical compound CCCCCCCCCCCCCCCCC NDJKXXJCMXVBJW-UHFFFAOYSA-N 0.000 claims abstract description 38
- LQERIDTXQFOHKA-UHFFFAOYSA-N nonadecane Chemical compound CCCCCCCCCCCCCCCCCCC LQERIDTXQFOHKA-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000002844 melting Methods 0.000 claims abstract description 12
- 230000008018 melting Effects 0.000 claims abstract description 12
- 238000005338 heat storage Methods 0.000 claims description 63
- 239000011232 storage material Substances 0.000 claims description 42
- RZJRJXONCZWCBN-UHFFFAOYSA-N octadecane Chemical compound CCCCCCCCCCCCCCCCCC RZJRJXONCZWCBN-UHFFFAOYSA-N 0.000 claims description 18
- 238000007710 freezing Methods 0.000 claims description 9
- 230000008014 freezing Effects 0.000 claims description 9
- PXVQDLOEGDNXOR-UHFFFAOYSA-N CCCCCCCCCCCCCCCCC.CCCCCCCCCCCCCCCCCCC Chemical compound CCCCCCCCCCCCCCCCC.CCCCCCCCCCCCCCCCCCC PXVQDLOEGDNXOR-UHFFFAOYSA-N 0.000 abstract 1
- OKQHLTFYGAWYKI-UHFFFAOYSA-N heptadecane nonadecane octadecane Chemical compound CCCCCCCCCCCCCCCCC.CCCCCCCCCCCCCCCCCC.CCCCCCCCCCCCCCCCCCC OKQHLTFYGAWYKI-UHFFFAOYSA-N 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 9
- 230000007423 decrease Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000004781 supercooling Methods 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 3
- 239000004566 building material Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 229910017053 inorganic salt Inorganic materials 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- GHVNFZFCNZKVNT-UHFFFAOYSA-N decanoic acid Chemical compound CCCCCCCCCC(O)=O GHVNFZFCNZKVNT-UHFFFAOYSA-N 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- DCAYPVUWAIABOU-UHFFFAOYSA-N hexadecane Chemical compound CCCCCCCCCCCCCCCC DCAYPVUWAIABOU-UHFFFAOYSA-N 0.000 description 2
- 150000004677 hydrates Chemical class 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000005632 Capric acid (CAS 334-48-5) Substances 0.000 description 1
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000003349 gelling agent Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003094 microcapsule Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000012985 polymerization agent Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Abstract
Description
本発明は、２０〜３５℃の温度領域に相変化に伴う融解潜熱を有するパラフィン系潜熱蓄熱材組成物に関するものであり、より具体的には建築物への保温保冷および室内と室外間の温度遮蔽機能の付加や、日用品および衣料品等の夏場の冷涼感や冬季の保温機能の付与に効果的な潜熱熱量の大きいパラフィン系潜熱蓄熱材組成物に関するものである。 The present invention relates to a paraffin-based latent heat storage material composition having a latent heat of fusion associated with a phase change in a temperature range of 20 to 35 ° C., and more specifically, a heat insulation and cooling to a building and a temperature between indoors and outdoors. The present invention relates to a paraffin-based latent heat storage material composition having a large amount of latent heat, which is effective for adding a shielding function, providing a cool feeling in summer such as daily necessities and clothing, and providing a heat retaining function in winter.
外気温度の変動に対して住宅やビル等の室内温度を快適な温度範囲に保つための冷暖房のエネルギー消費を低減するために、建物の気密性を高めたり、壁や天井、床などに断熱材を用いて室内と室外の間の熱移動を抑制することが一般に行われている。これに対して、太陽熱や外気、冷暖房などを熱源とする余剰エネルギーを建物の躯体等に蓄える蓄熱技術が提案されている。例えば、夜間に比較的低温な外気から冷熱を蓄積した後に日中に放出することで室内温度の上昇を抑制することができ、また、日中に室内空気から温熱を蓄積した後に夜間に放出することで室内温度の低下を抑制することができる。さらに、蓄熱熱容量を大きくして省エネルギー効果を大きくするために、２０〜３５℃の人体快適温度領域に相変化温度を有する潜熱蓄熱材を建築材料に組み込むことが行われている（例えば、非特許文献１参照）。 In order to reduce the energy consumption of air conditioning to keep the indoor temperature of houses and buildings within a comfortable temperature range against fluctuations in the outside air temperature, the building's airtightness is increased, and heat insulation is applied to walls, ceilings, floors, etc. In general, it is used to suppress heat transfer between the room and the outside. On the other hand, a heat storage technique has been proposed in which surplus energy using solar heat, outside air, air conditioning, or the like as a heat source is stored in a building frame or the like. For example, it is possible to suppress the rise in indoor temperature by storing cool heat from outside air at a relatively low temperature during the night and then releasing it during the day. Thus, a decrease in the indoor temperature can be suppressed. Furthermore, in order to increase the heat storage heat capacity and increase the energy saving effect, a latent heat storage material having a phase change temperature in the human body comfortable temperature region of 20 to 35 ° C. is incorporated into building materials (for example, non-patented). Reference 1).
このような用途に供することができる潜熱蓄熱材として無機塩水和物が知られているが、該無機塩水和物には腐食性の問題や、過冷却度が大きく、また相変化を繰り返すにつれて相分離を起すため安定性に劣るという欠点がある（例えば、非特許文献２参照）。 Inorganic salt hydrates are known as latent heat storage materials that can be used for such applications. However, the inorganic salt hydrates have a corrosive problem, a large degree of supercooling, and a phase change as the phase change is repeated. There is a drawback that the stability is inferior because separation occurs (see, for example, Non-Patent Document 2).
一方、有機脂肪酸やノルマルパラフィンなどの有機系の潜熱蓄熱材も知られている。このうちノルマルパラフィンについては、マイクロカプセル化して衣料材料に組み込み、外気や人体の熱を利用して、体感温度をコントロールする方法が提案されている（例えば、特許文献１参照）。 On the other hand, organic latent heat storage materials such as organic fatty acids and normal paraffin are also known. Among these, for normal paraffin, a method has been proposed in which microcapsules are incorporated into clothing materials and the temperature of the body temperature is controlled using the outside air or the heat of the human body (see, for example, Patent Document 1).
また、ノルマルパラフィンを使用して、相変化温度を制御する技術も提案されている（例えば、特許文献２参照）。しかしながら、この蓄熱材の使用温度範囲は−１０〜２０℃程度であり、人体快適温度領域とされる２０〜３５℃領域に有効でないという欠点があった。 In addition, a technique for controlling the phase change temperature using normal paraffin has been proposed (see, for example, Patent Document 2). However, the operating temperature range of this heat storage material is about −10 to 20 ° C., and there is a drawback that it is not effective in the 20 to 35 ° C. region, which is the human body comfortable temperature region.
このような状況下、本発明は上記問題点を解決したものであり、即ち、本発明の目的は、２０〜３５℃の領域に広く融解潜熱を有し、潜熱の取出し作動温度領域が広く、かつ、該温度範囲での蓄熱容量が大きいパラフィン系潜熱蓄熱材組成物を提供することである。 Under such circumstances, the present invention has solved the above-mentioned problems, that is, the object of the present invention is to have a wide latent heat of melting in the region of 20 to 35 ° C. And it is providing the paraffin type latent heat storage material composition with a large heat storage capacity | capacitance in this temperature range.
本発明者らは、上記課題を解決するために鋭意研究を重ねた結果、実質的にｎ-ヘプタデカンとｎ-オクタデカンとｎ-ノナデカンとの３成分からなり、その３成分を所定の割合で含有するノルマルパラフィン混合物が、２０〜３５℃領域に広く潜熱ピークを有し、蓄熱容量が大きく、相変化を繰り返しても安定で、過冷却現象も少なく、潜熱蓄熱材として非常に有用であることを見出した。 As a result of intensive studies to solve the above problems, the inventors of the present invention are substantially composed of three components of n-heptadecane, n-octadecane and n-nonadecane, and the three components are contained in a predetermined ratio. That the normal paraffin mixture has a wide latent heat peak in the range of 20 to 35 ° C., has a large heat storage capacity, is stable even after repeated phase changes, has little subcooling phenomenon, and is extremely useful as a latent heat storage material. I found it.
本発明は、上記知見に基づきなされたものであり、ｎ-ヘプタデカンの含有量が１〜１７重量％、ｎ-ノナデカンの含有量が０.１〜１０重量％、かつｎ-ヘプタデカンとｎ-ノナデカンとの合計含有量が５重量％以上であり、ｎ-ヘプタデカンとｎ-オクタデカンとｎ-ノナデカンとの合計含有量が９０重量％、好ましくは９５重量％以上であるパラフィン系潜熱蓄熱材組成物にかかるものである。 The present invention has been made on the basis of the above findings. The content of n-heptadecane is 1 to 17% by weight, the content of n-nonadecane is 0.1 to 10% by weight, and n-heptadecane and n-nonadecane. And a paraffin-based latent heat storage material composition having a total content of n-heptadecane, n-octadecane and n-nonadecane of 90% by weight, preferably 95% by weight or more. It is such a thing.
本発明のパラフィン系潜熱蓄熱材組成物は、特に、昇温時に２０〜２５℃の範囲に融点を有し、かつ降温時に２０〜３０℃の範囲に凝固点を有することが好ましく、また、全吸熱潜熱熱量（Ｑ）のうち、昇温時の２０〜４０℃の範囲の吸熱総潜熱熱量（Ｑ１）が２００Ｊ／ｇ以上であり、かつ昇温時の２０〜２５℃の範囲の吸熱潜熱熱量（Ｑ２）がＱ１の２０％以上であることが好ましい。 In particular, the paraffin-based latent heat storage material composition of the present invention preferably has a melting point in the range of 20 to 25 ° C. when the temperature is raised, and has a freezing point in the range of 20 to 30 ° C. when the temperature is lowered. Of the latent heat quantity (Q), the endothermic total latent heat quantity (Q1) in the range of 20 to 40 ° C. at the time of temperature rise is 200 J / g or more, and the endothermic latent heat quantity in the range of 20 to 25 ° C. at the time of temperature rise ( Q2) is preferably 20% or more of Q1.
本発明の潜熱蓄熱材組成物は、パラフィン系であるので、過冷却現象が小さく、相分離を起さず、腐食性を持たないため、長期間安定して使用する上での制限が少ないことに加えて、２０〜３５℃の領域に広く潜熱ピークを持ち、蓄熱材として有効な作動温度領域が広く、更には、蓄熱容量が大きい等の格別の効果を有する。 Since the latent heat storage material composition of the present invention is paraffinic, the supercooling phenomenon is small, phase separation does not occur, and it does not have corrosiveness, so there are few restrictions on stable use for a long time. In addition, it has a large latent heat peak in the region of 20 to 35 ° C., has a wide operating temperature range effective as a heat storage material, and has a special effect such as a large heat storage capacity.
以下に、本発明を詳細に説明する。本発明のパラフィン系潜熱蓄熱材組成物は、実質的にｎ-ヘプタデカンとｎ-オクタデカンとｎ-ノナデカンとからなる。 The present invention is described in detail below. The paraffin-based latent heat storage material composition of the present invention substantially consists of n-heptadecane, n-octadecane and n-nonadecane.
本発明のパラフィン系潜熱蓄熱材組成物におけるｎ-ヘプタデカンの含有量は、１〜１７重量％であり、好ましくは５〜１５重量％である。ｎ-ヘプタデカンの含有率が１７重量％を超えると、昇温時に全吸熱潜熱熱量（Ｑ）の一部が２０℃以下の範囲に現れるため、昇温時の２０〜４０℃の範囲の吸熱総潜熱熱量（Ｑ１）が２００Ｊ／ｇ未満となり、蓄熱に有効な潜熱容量が減少する。また、昇温時に２０〜２５℃の範囲の吸熱潜熱熱量（Ｑ２）が減少するため、蓄熱に有効な潜熱容量が減少するばかりでなく、蓄熱材として有効な作動温度領域が狭くなる。一方、ｎ-ヘプタデカンの含有率が１重量％未満であると、Ｑ１は２００Ｊ／ｇ以上となるものの、Ｑ２がＱ１の２０％未満となり、蓄熱材として有効な作動温度領域が狭くなる。 The content of n-heptadecane in the paraffin-based latent heat storage material composition of the present invention is 1 to 17% by weight, preferably 5 to 15% by weight. When the content of n-heptadecane exceeds 17% by weight, a part of the total endothermic latent heat (Q) appears in the range of 20 ° C. or less at the time of temperature rise, so the endothermic total in the range of 20 to 40 ° C. at the time of temperature rise. The latent heat quantity (Q1) is less than 200 J / g, and the latent heat capacity effective for heat storage is reduced. Moreover, since the endothermic latent heat quantity (Q2) in the range of 20 to 25 ° C. is reduced at the time of temperature rise, not only the latent heat capacity effective for heat storage is reduced, but also the operating temperature range effective as a heat storage material is narrowed. On the other hand, when the content of n-heptadecane is less than 1% by weight, Q1 is 200 J / g or more, but Q2 is less than 20% of Q1, and the operating temperature range effective as a heat storage material is narrowed.
本発明のパラフィン系潜熱蓄熱材組成物におけるｎ-ノナデカンの含有量は、０.１〜１０重量％であり、好ましくは１〜５重量％である。ｎ-ノナデカンの含有率が１０重量％を超えると、昇温時にＱの一部が２０℃以下の範囲に現れるため、Ｑ１が２００Ｊ／ｇ未満となり、有効な蓄熱容量が減少する。また、昇温時にＱ２が減少するため、蓄熱材として有効な作動温度領域が狭くなる。一方、ｎ-ノナデカンの含有率が０.１重量％未満であると、Ｑ１は２００Ｊ／ｇ以上となるものの、Ｑ２がＱ１の２０％未満となり、蓄熱材として有効な作動温度領域が狭くなる。 The content of n-nonadecane in the paraffin-based latent heat storage material composition of the present invention is 0.1 to 10% by weight, preferably 1 to 5% by weight. When the content of n-nonadecane exceeds 10% by weight, a part of Q appears in the range of 20 ° C. or less when the temperature is raised, so that Q1 becomes less than 200 J / g, and the effective heat storage capacity decreases. Moreover, since Q2 decreases when the temperature rises, the operating temperature range effective as a heat storage material is narrowed. On the other hand, when the content of n-nonadecane is less than 0.1% by weight, Q1 becomes 200 J / g or more, but Q2 becomes less than 20% of Q1, and the operating temperature range effective as a heat storage material becomes narrow.
本発明のパラフィン系潜熱蓄熱材組成物において、上記ｎ-ヘプタデカンと上記ｎ-ノナデカンとの合計含有量は、５重量％以上であり、好ましくは１０重量％以上である。ｎ-ヘプタデカンとｎ-ノナデカンとの含有率の合計が５重量％未満であると、２０〜２５℃の範囲の吸熱潜熱熱量が小さいため、有効な蓄熱容量は大きいものの、作動温度領域が狭くなり、温度が一定でない太陽熱や外気などを熱源とする蓄熱技術に適さなくなる。 In the paraffin-based latent heat storage material composition of the present invention, the total content of the n-heptadecane and the n-nonadecane is 5% by weight or more, preferably 10% by weight or more. If the total content of n-heptadecane and n-nonadecane is less than 5% by weight, the endothermic latent heat in the range of 20-25 ° C is small, so the effective heat storage capacity is large, but the operating temperature range is narrowed. , It becomes unsuitable for the heat storage technology that uses solar heat or outside air whose temperature is not constant as a heat source.
また、本発明のパラフィン系潜熱蓄熱材組成物において、ｎ-ヘプタデカンとｎ-オクタデカンとｎ-ノナデカンとの合計含有量は、９０重量％以上であり、好ましくは９５重量％以上である。ｎ-ヘプタデカンとｎ-オクタデカンとｎ-ノナデカンとの含有率の合計が９０重量％未満では、２０〜４０℃の範囲の吸熱総潜熱熱量が減少し、有効な蓄熱容量が減少する。 In the paraffin-based latent heat storage material composition of the present invention, the total content of n-heptadecane, n-octadecane and n-nonadecane is 90% by weight or more, preferably 95% by weight or more. When the total content of n-heptadecane, n-octadecane and n-nonadecane is less than 90% by weight, the total endothermic heat quantity in the range of 20 to 40 ° C. is decreased, and the effective heat storage capacity is decreased.
本発明のパラフィン系潜熱蓄熱材組成物は、上記条件を満足していれば差し支えなく、炭素数１７未満あるいは炭素数２０以上のノルマルパラフィンを更に含有してもよい。 The paraffin-based latent heat storage material composition of the present invention may further contain normal paraffin having less than 17 carbon atoms or 20 carbon atoms insofar as the above conditions are satisfied.
また、本発明のパラフィン系潜熱蓄熱材組成物は、昇温時に２０〜２５℃の範囲に融点を有し、かつ降温時に２０〜３０℃の範囲に凝固点を有することが好ましい。昇温時に融点が２０℃未満であると、Ｑの一部が人体快適温度よりも低い温度領域に現れるため、有効な蓄熱容量が減少して、建築材料に組み込んだ際の冷暖房の省エネルギー効果が低下したり、衣料材料に組み込んだときに期待される人体の皮膚温度が適温に保持される時間が短くなる。一方、昇温時に融点が２５℃を超えると、有効な蓄熱容量は大きいものの、Ｑ２が減少するため、作動温度領域が狭くなり、温度が一定でない太陽熱や外気などを熱源とする蓄熱技術に適さなくなる。また、降温時に凝固点が２０℃未満であると、作動温度領域が人体快適温度領域と比較して低くなり、有効な蓄熱容量が減少する。一方、降温時に凝固点が３０℃を超えると、作動温度領域が人体快適温度領域と比較して高くなり、有効な蓄熱容量が減少する。 The paraffin-based latent heat storage material composition of the present invention preferably has a melting point in the range of 20 to 25 ° C. when the temperature is raised, and has a freezing point in the range of 20 to 30 ° C. when the temperature is lowered. If the melting point is less than 20 ° C when the temperature rises, a part of Q appears in a temperature range lower than the human comfortable temperature, so the effective heat storage capacity is reduced and the energy-saving effect of air conditioning when incorporated in building materials The time during which the skin temperature of the human body, which is expected to be lowered or incorporated into clothing materials, is maintained at an appropriate temperature is shortened. On the other hand, if the melting point exceeds 25 ° C. at the time of temperature rise, the effective heat storage capacity is large, but Q2 decreases, so the operating temperature range becomes narrow, and it is suitable for the heat storage technology that uses solar heat or outside air as a heat source. Disappear. Further, when the freezing point is lower than 20 ° C. when the temperature is lowered, the operating temperature region is lower than the human body comfortable temperature region, and the effective heat storage capacity is reduced. On the other hand, when the freezing point exceeds 30 ° C. when the temperature is lowered, the operating temperature region becomes higher than the human body comfortable temperature region, and the effective heat storage capacity decreases.
本発明のパラフィン系潜熱蓄熱材組成物は、昇温時の２０〜４０℃の範囲の吸熱総潜熱熱量（Ｑ１）が２００Ｊ／ｇ以上であり、かつ昇温時の２０〜２５℃の範囲の吸熱潜熱熱量（Ｑ２）が２０〜４０℃の範囲の吸熱総潜熱熱量（Ｑ１）の２０％以上であることが好ましい。Ｑ１が２００Ｊ／ｇ未満であると、蓄熱容量が小さいため、建築材料に組み込んだ際に冷暖房の省エネルギー効果が充分に得られなかったり、衣料材料に組み込んだときに人体の皮膚温度を適温に安定させる効果が短時間しか持続しないことがある。また、Ｑ２がＱ１の２０％未満であると、有効な蓄熱容量は大きいものの、作動温度領域が狭くなり、温度が一定でない太陽熱や外気などを熱源とする蓄熱技術に適さなくなる。 The paraffin-based latent heat storage material composition of the present invention has an endothermic total latent heat quantity (Q1) in the range of 20 to 40 ° C. at the time of temperature increase of 200 J / g or more, and in the range of 20 to 25 ° C. at the time of temperature increase. The endothermic latent heat (Q2) is preferably 20% or more of the total endothermic heat (Q1) in the range of 20 to 40 ° C. When Q1 is less than 200 J / g, the heat storage capacity is small, so the energy-saving effect of cooling and heating cannot be obtained sufficiently when incorporated into building materials, or the human skin temperature is stabilized at an appropriate temperature when incorporated into clothing materials. The effect to be sustained may last only for a short time. If Q2 is less than 20% of Q1, the effective heat storage capacity is large, but the operating temperature range becomes narrow, making it unsuitable for a heat storage technique that uses solar heat or outside air whose temperature is not constant as a heat source.
また、本発明のパラフィン系潜熱蓄熱材組成物は、ノルマルパラフィン以外に他の構造の炭化水素、例えばイソパラフィン、オレフィン、ナフテンあるいは芳香族成分を不純物として含んでいても差し支えなく、マイクロカプセル等の応用製品を製造する際に用いる樹脂モノマー、重合剤、界面活性剤などを含んでいても差し支えない。 Further, the paraffin-based latent heat storage material composition of the present invention may contain hydrocarbons having other structures in addition to normal paraffin, for example, isoparaffin, olefin, naphthene, or aromatic components as impurities. A resin monomer, a polymerization agent, a surfactant, and the like used for manufacturing the product may be included.
更に、本発明のパラフィン系潜熱蓄熱材組成物には、本発明の目的を損なわない範囲において、酸化防止剤、紫外線吸収剤等の通常用いられる添加剤、過冷却防止剤、比重調整剤、顔料や染料等の着色剤、芳香剤、ゲル化剤等の添加剤を含ませることができる。 Further, the paraffin-based latent heat storage material composition of the present invention includes additives usually used such as an antioxidant and an ultraviolet absorber, a supercooling inhibitor, a specific gravity adjuster, and a pigment as long as the object of the present invention is not impaired. And additives such as coloring agents such as dyes, fragrances, and gelling agents.
以下に、実施例を挙げて本発明を更に詳しく説明するが、本発明は下記の実施例に何ら限定されるものではない。 Hereinafter, the present invention will be described in more detail with reference to examples. However, the present invention is not limited to the following examples.
（実施例１〜２）
蓄熱材組成物として、ｎ-ヘプタデカンとｎ-オクタデカンとｎ-ノナデカンからなる実施例１，２の組成物を調製した。組成混合比を表１に示す。
(Examples 1-2)
As the heat storage material composition, compositions of Examples 1 and 2 consisting of n-heptadecane, n-octadecane and n-nonadecane were prepared. The composition mixing ratio is shown in Table 1.
表１中、凝固点、融点および潜熱量は、セイコーインスツルメンツ社製ＤＳＣ２２０ＣＵ型示差走査熱量計を用いて測定した。示差走査熱量計により得られる温度−熱量のモデル図を図１に示す。 In Table 1, the freezing point, melting point and latent heat were measured using a DSC220CU differential scanning calorimeter manufactured by Seiko Instruments. A model of temperature-heat quantity obtained by a differential scanning calorimeter is shown in FIG.
ここで、昇温速度１０℃／分の速度で加熱したときに得られた温度−熱量図のピークの最大傾斜の接線がベースラインと交わる点の温度を融点とし、また、降温速度１０℃／分の速度で冷却したときに得られた温度−熱量図のピークの最大傾斜の接線がベースラインと交わる点の温度を凝固点とした。更に、融点から凝固点を差し引いた値を過冷却度と定義し、表１に示した。 Here, the temperature at the point where the tangent of the maximum slope of the peak of the temperature-caloric diagram obtained when heating at a rate of temperature increase of 10 ° C./min intersects the baseline is the melting point, and the rate of temperature decrease is 10 ° C. / The temperature at the point where the tangent of the maximum slope of the peak of the temperature-caloric diagram obtained when cooling at a rate of minutes intersected the baseline was taken as the freezing point. Further, the value obtained by subtracting the freezing point from the melting point was defined as the degree of supercooling and is shown in Table 1.
また、表１中、安定性は、１０００回の熱サイクル試験後の潜熱熱量が初期値の７０％以上を保つ場合を○、７０％未満になる場合を×で表記した。 In Table 1, the stability is indicated by ◯ when the latent heat after 1000 heat cycle tests is maintained at 70% or more of the initial value, and by × when it is less than 70%.
（比較例１〜５）
比較例１〜３として、ｎ-ヘキサデカン、ｎ-ヘプタデカン、ｎ-オクタデカン及びｎ-ノナデカンからなる蓄熱材組成物を表１に示す割合で調製した。また、比較例４として無機蓄熱材であるＮａ2ＳＯ4・１０Ｈ2Ｏを、比較例５として有機蓄熱材であるカプリン酸を用いた。これらに対し、凝固点、融点および潜熱量を実施例と同様の方法で測定し、評価した。結果を表１に示す。
(Comparative Examples 1-5)
As Comparative Examples 1 to 3, heat storage material compositions composed of n-hexadecane, n-heptadecane, n-octadecane and n-nonadecane were prepared at the ratios shown in Table 1. In addition, Na 2 SO 4 .10H 2 O, which is an inorganic heat storage material, was used as Comparative Example 4, and capric acid, which was an organic heat storage material, was used as Comparative Example 5. For these, the freezing point, melting point and latent heat were measured and evaluated in the same manner as in the examples. The results are shown in Table 1.
表１から明らかなように、本発明に従う実施例の蓄熱材組成物は、Ｑ１が２００Ｊ／ｇ以上で蓄熱容量が大きく、Ｑ２／Ｑ１が２０％以上で蓄熱容量の大きい作動温度領域が広い上、安定性も良好であり、蓄熱材組成物として優れた特性を有していた。 As is apparent from Table 1, the heat storage material compositions of the examples according to the present invention have a wide operating temperature range where Q1 is 200 J / g or more and the heat storage capacity is large, and Q2 / Q1 is 20% or more and the heat storage capacity is large. Also, the stability was good and it had excellent characteristics as a heat storage material composition.
一方、比較例１及び比較例３の蓄熱材組成物は、ｎ-ヘプタデカンの含有量が多すぎるため、Ｑ１が２００Ｊ／ｇ未満で潜熱容量が小さかった。また、ｎ-オクタデカンのみからなる比較例２の蓄熱材組成物は、融点が２５℃を超え、Ｑ２が０で、作動温度領域が狭かった。更に、比較例４の蓄熱材組成物は、無機塩水和物からなるため安定性が低く、比較例５の蓄熱材組成物は、有機脂肪酸からなるため、潜熱容量が小さかった。 On the other hand, since the heat storage material compositions of Comparative Example 1 and Comparative Example 3 contained too much n-heptadecane, Q1 was less than 200 J / g and the latent heat capacity was small. Moreover, the heat storage material composition of Comparative Example 2 consisting only of n-octadecane had a melting point of over 25 ° C., Q2 of 0, and a narrow operating temperature range. Furthermore, since the heat storage material composition of Comparative Example 4 was composed of an inorganic salt hydrate, the stability was low, and since the heat storage material composition of Comparative Example 5 was composed of an organic fatty acid, the latent heat capacity was small.
本発明のパラフィン系潜熱蓄熱材組成物は、建築物への保温保冷および室内と室外間の温度遮蔽機能の付加や、日用品および衣料品等の夏場の冷涼感や冬季の保温機能の付与に有用である。 The paraffin-based latent heat storage material composition of the present invention is useful for keeping a building warm and cold, adding a temperature shielding function between indoors and outdoors, and imparting a cool feeling in summer such as daily necessities and clothing and a warming function in winter. It is.
Claims (3)
The endothermic total latent heat quantity in the range of 20 to 40 ° C. at the time of temperature rise is 200 J / g or more, and the endothermic total latent heat quantity in the range of 20 to 25 ° C. at the time of temperature rise is 20 to 40 ° C. The paraffin-based latent heat storage material composition according to claim 1 or 2, wherein the composition is 20% or more.
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