CN102660234B - Phase change material composition for heat energy-mechanical energy conversion - Google Patents
Phase change material composition for heat energy-mechanical energy conversion Download PDFInfo
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- CN102660234B CN102660234B CN201210147949.5A CN201210147949A CN102660234B CN 102660234 B CN102660234 B CN 102660234B CN 201210147949 A CN201210147949 A CN 201210147949A CN 102660234 B CN102660234 B CN 102660234B
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- phase change
- heat energy
- mechanical energy
- material composition
- change material
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- 239000000203 mixture Substances 0.000 title claims abstract description 25
- 239000012782 phase change material Substances 0.000 title claims abstract description 20
- 238000006243 chemical reaction Methods 0.000 title abstract description 8
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 claims description 12
- 239000002253 acid Substances 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 230000001131 transforming effect Effects 0.000 claims description 7
- 239000005639 Lauric acid Substances 0.000 claims description 6
- TWJNQYPJQDRXPH-UHFFFAOYSA-N 2-cyanobenzohydrazide Chemical compound NNC(=O)C1=CC=CC=C1C#N TWJNQYPJQDRXPH-UHFFFAOYSA-N 0.000 claims description 5
- 235000021360 Myristic acid Nutrition 0.000 claims description 5
- TUNFSRHWOTWDNC-UHFFFAOYSA-N Myristic acid Natural products CCCCCCCCCCCCCC(O)=O TUNFSRHWOTWDNC-UHFFFAOYSA-N 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 5
- 239000010439 graphite Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 abstract description 28
- 230000008859 change Effects 0.000 abstract description 15
- 239000007788 liquid Substances 0.000 abstract description 6
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 239000007787 solid Substances 0.000 abstract description 3
- 230000009466 transformation Effects 0.000 description 16
- 239000012071 phase Substances 0.000 description 10
- 239000003795 chemical substances by application Substances 0.000 description 7
- 125000004432 carbon atom Chemical group C* 0.000 description 6
- 239000012188 paraffin wax Substances 0.000 description 5
- 239000005416 organic matter Substances 0.000 description 4
- 150000001335 aliphatic alkanes Chemical class 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 235000021281 monounsaturated fatty acids Nutrition 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 239000012611 container material Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 150000002430 hydrocarbons Chemical group 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 150000003138 primary alcohols Chemical class 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- TUNFSRHWOTWDNC-HKGQFRNVSA-N tetradecanoic acid Chemical compound CCCCCCCCCCCCC[14C](O)=O TUNFSRHWOTWDNC-HKGQFRNVSA-N 0.000 description 1
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- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to a phase change material composition for heat energy-mechanical energy conversion, which has a high-phase-change volume expansion ratio. A base material of the phase change material composition has a one-dimensional linear molecular structure characteristic, thus molecules of the base material can be ranked axially in parallel in the solid state, while the molecules is in random back arrangement in the liquid state, thus the density differences of the molecules in the solid state and the liquid state are great, thus the phase change material composition has a high-phase-change volume change rate, and the conversion efficiency between heat energy and mechanical energy can be improved. The material is low in cost, and the phase change range can be regulated, thus the phase change material composition for heat energy-mechanical energy conversion can be regulated according to temperature required to be sensed or controlled.
Description
Technical field
The present invention relates to a class and can be used for the phase change material with high phase transformation cubical expansivity that heat energy-mechanical energy transforms field.Belong to a class have high phase transformation cubical expansivity material application method and in the application of temperature sensing and related fields, belong to material applied technical field.
Background technology
Utilize the sudden change of material solid-liquid phase change front and back density, volume is therebetween collapsed to the mechanism that is converted into mechanical reciprocating motion, the telescopic displacement that not only can drive by envrionment temperature is exported, the current size of controlling cold water or hot water realizes the regulation and control to water temperature, and can be by certain mechanism design, this to-and-fro movement is converted into needed specific mechanical motion, thereby utilize these energy intermittently of used heat, underground heat, temperature Change, sunshine, ebb electric energy, be translated into mechanical energy and further apply.The displacement output resistance to pressure being driven by solid-liquid phase change is good, after enclosed package, do not consume, non-volatile, thereby the automatic temperature-controlled element of the non-electric type of the Non-energy-consumption that can become a kind of green safety, realize the operation of automatic temperature-controlled, the automatic flow regulating valve of non-electric type, automatic water-mixing, be particularly suitable in some inflammable and explosive places, as chemical plant, mine are used; Also can be used for being converted into length, electricity, magnetic equisignal system by means of the sudden change of this volume and become various heat energy, temperature-sensing element or control valve, can also utilize ocean current or seawater temperature to make long lifetime underwater glider for the monitoring of marine ecology with the variation of the degree of depth, also can become a kind of new green generating approach by particular organization design.
With phase change material, require alap coefficient of thermal expansion different with energy storage, the phase change material transforming in transferring heat energy mechanical energy requires high as far as possible phase transformation volume change (solid-liquid density difference is large) to improve the response accuracy of displacement output to envrionment temperature, improves the transformation efficiency of heat energy-mechanical energy; Can bear larger pressure (rate of expansion be stressed impact little) to adapt to harsher environment.In addition, latent heat of phase change I makes sensing sensitiveer; Thermal conductivity height can improve the time of response; Need to be suitable for this phase change material of differing temps scope to improve its environmental compatibility.
Current, for the phase change material of this kind of object, be mainly the alloy of the straight-chain paraffin of different chain length.Its phase change expansion rate is high, stable, corrosion-free to container material quality.But nonpolar due to straight-chain paraffin, a little less than its Intermolecular Forces, its fusing point is corresponding derivative (see figure 2) containing identical several carbonatomss lower than it significantly, makes it in common heat energy-mechanical energy, transform field, and the molecular weight needing is higher, makes its raw materials cost high.
Summary of the invention
The object of this invention is to provide a kind of save energy, there is take of safety and reliability and realize the composition that heat energy-mechanical energy Efficient Conversion is object.
Realize above-mentioned purpose, the technical solution used in the present invention is: a kind of phase change material composition transforming for heat energy-mechanical energy, is characterized in that: described phase change material composition consists of two organic matter base-materials and a kind of thermal conducting agent with straight-chain molecular structure feature; Described composition weight is than being organism base-material 65-90%, thermal conducting agent 10-35%;
Described organism base-material is the following organic alloy of 12 ~ 24 containing carbon number by one or both: straight chain alkanol, straight chain alkanoic acid, the trans monounsaturated fatty acids of straight chain;
Described thermal conducting agent is graphite.
Further, the phase change material composition transforming for heat energy-mechanical energy, is comprised of the composition of following weight ratio; Normal chain alkanoic acid 85-90%, graphite 10-15%; Wherein, normal chain alkanoic acid is containing lauric acid and myristic acid; The mol ratio of lauric acid and myristic acid is 2:1.
Compared to existing technology, tool of the present invention has the following advantages:
1, the present invention has the base-material of one-dimensional linear molecular characterization, making its molecule when solid-state, can be axially parallel arranges, and molecule is random random rear arrangement when liquid state, thereby cause its mushy stage density variation large, make it have high phase transformation volume change, can improve thus the transformation efficiency of heat energy-mechanical energy.
2, the present invention is by having two organic matter base-materials of straight-chain molecular structure feature and the phase change material composition that a kind of thermal conducting agent forms, the intermolecular forces that utilizes the polarity of organism base-material and strengthen, described composition is had than the higher fusing point of linear alkane molecule containing same carbon atoms number, can utilize the organism of describing of lower molecular weight to realize the conversion of heat energy-mechanical energy or the temperature adjusting in synthermal scope, to reduce material cost.
3, the cost of material is low for said composition, and phase transformation range is adjustable, can be according to needing the temperature of sensing or control to regulate.
4, the phase change material composition base-material used that the present invention transforms for heat energy-mechanical energy, under the prerequisite of the carbonatoms of hydrocarbon chain, its transformation temperature significantly improves than the transformation temperature of mapping straight-chain paraffin, therefore in the situation that applied transformation temperature is given, available containing carbon number base-material still less, reach the object that reduces raw materials cost.
Accompanying drawing explanation
Fig. 1 is that temperature is on the impact of volume change (28 normal atmosphere of pressure);
Fig. 2 is the relationship change figure of fusing point and chain length.
Embodiment
Embodiment 1: a kind of phase change material composition transforming for heat energy-mechanical energy, consists of two organic matter base-materials and a kind of thermal conducting agent with straight-chain molecular structure feature.Described composition weight is than being organism base-material 65-90%, and for example the weight ratio of organism base-material and thermal conducting agent is 65:35; 70:30; 75:25; 80:20; Or 90:10 etc.
The straight chain alkanol that described organism base-material uses is straight chain primary alcohol, and its constitutional features is CH
3(CH
2)
10 ~ 22cH
2oH, in its straight chain termination with polar group-OH.Described thermal conducting agent is graphite.
Embodiment 2: as different from Example 1, described organism base-material is linear straight chain alkanoic acid, and its molecular formula is CH
3(CH
2)
10 ~ 22cOOH, in its straight chain termination with polar group-COOH.
Embodiment 3: as different from Example 1, described organism base-material is the trans monounsaturated fatty acids of straight chain, and its molecular formula is CH
3(CH
2)
xcH=CH (CH
2)
ycOOH, X+Y=8 ~ 20 in formula, the polar group-COOH in its chain termination.
Its base-material of the present invention has one-dimensional linear molecular characterization, making its molecule when solid-state, can be axially parallel arranges, and molecule is random random rear arrangement when liquid state, thereby cause its mushy stage density variation large, make it have high phase transformation volume change, can improve thus the transformation efficiency of heat energy-mechanical energy.And, adopt the organism of the molecular structure of sawtooth chain, its advantage can make to realize more closely and piling up under its solid state, its end of the chain headband polar group, intermolecular forces is increased, the straight-chain paraffin that fusing point is identical compared with carbonatoms is large, can utilize the organism of describing of lower molecular weight to realize the conversion of heat energy-mechanical energy or the temperature adjusting in synthermal scope, to reduce material cost.The intermolecular forces that utilizes the polarity of organism base-material and strengthen, has than the higher fusing point of linear alkane molecule containing same carbon atoms number, to reduce material cost described composition.
Preferably, the described phase change material composition transforming for heat energy-mechanical energy, is comprised of the composition of following weight ratio; Normal chain alkanoic acid 85-90%, graphite 10-15%; Concrete weight ratio is 85:15,88:12 or 90:10; Wherein, normal chain alkanoic acid is the solution of lauric acid and myristic acid, and the mol ratio of lauric acid and myristic acid is 2:1.Referring to Fig. 1, said composition is phase change expansion rate high (~ 8%), transformation temperature narrow range (40 ~ 43 under 28 normal atmosphere
oc) feature.
The transformation temperature of the phase change material composition that the present invention transforms for heat energy-mechanical energy significantly improves, retains simultaneously the characteristic of its high phase transformation cubical expansivity than the transformation temperature of mapping n-paraffin, reach the object that reduces raw materials cost.Its basic ingredients is the two organic matter base-materials with straight-chain molecular structure feature, than the intermolecular high-melting-point having compared with strong intermolecular forces of linear alkane containing same carbon atoms number, can utilize the organism of describing of lower molecular weight to realize the conversion of heat energy-mechanical energy or the temperature adjusting in synthermal scope, can significantly reduce material cost.When this organic molecular species can be closely regularly arranged by the maximized principle of Intermolecular Forces when solidifying, during fusing, because being random disorganized form to intermolecular interval, strengthens molecular thermalmotion, thereby because density difference between solid-state and liquid state causes the high cubical expansivity of fusing front and back, by realizing heat energy-mechanical energy, effectively transform for fields such as non-electromagnetic temperature-control, generatings.
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement the technical scheme of invention, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (1)
1. the phase change material composition transforming for heat energy-mechanical energy, is characterized in that:
Composition by following weight ratio forms; Normal chain alkanoic acid 85-90%, graphite 10-15%; Wherein, normal chain alkanoic acid is containing lauric acid and myristic acid; The mol ratio of lauric acid and myristic acid is 2:1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210147949.5A CN102660234B (en) | 2012-05-14 | 2012-05-14 | Phase change material composition for heat energy-mechanical energy conversion |
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|---|---|---|---|
| CN201210147949.5A CN102660234B (en) | 2012-05-14 | 2012-05-14 | Phase change material composition for heat energy-mechanical energy conversion |
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| Publication Number | Publication Date |
|---|---|
| CN102660234A CN102660234A (en) | 2012-09-12 |
| CN102660234B true CN102660234B (en) | 2014-10-22 |
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| CN201210147949.5A Expired - Fee Related CN102660234B (en) | 2012-05-14 | 2012-05-14 | Phase change material composition for heat energy-mechanical energy conversion |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101635382A (en) * | 2009-08-28 | 2010-01-27 | 南京双登科技发展研究院有限公司 | Heat dissipation method for power lithium battery |
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2012
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101635382A (en) * | 2009-08-28 | 2010-01-27 | 南京双登科技发展研究院有限公司 | Heat dissipation method for power lithium battery |
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| Publication number | Publication date |
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| CN102660234A (en) | 2012-09-12 |
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Granted publication date: 20141022 |