CN102786913A - Energy storage material composition of 58 DEG C - Google Patents
Energy storage material composition of 58 DEG C Download PDFInfo
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- CN102786913A CN102786913A CN2012103161152A CN201210316115A CN102786913A CN 102786913 A CN102786913 A CN 102786913A CN 2012103161152 A CN2012103161152 A CN 2012103161152A CN 201210316115 A CN201210316115 A CN 201210316115A CN 102786913 A CN102786913 A CN 102786913A
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- 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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention discloses an energy storage material composition of 58 DEG C. The composition consists of magnesium nitrate, magnesium chloride, water, urea, magnesium sulfate, magnesium carbonate and vapor phase method silicon dioxide. The crystallization temperature of the composition is in a range from 57 DEG C to 60 DEG C, the solution heat is more 200kj/kg, and the composition can be widely used in fields such as solar energy, terrestrial heat storage and waste heat recovery of various furnaces.
Description
Technical field
The present invention relates to a kind of 58 ℃ of energy storage material compsns, the Tc of said composition is 57～60 ℃, and latent heat of fusion can reach 200kJ/kg.After adding a certain proportion of functional additive, the cocrystallization temperature-stable of hydrate and urea that makes magnesium nitrate, magnesium chloride is at 57～60 ℃, overcome high, the problem such as layering easily in the use repeatedly of eutectic salts mixture condensate depression simultaneously.According to the resulting energy storage material compsn of the present invention, can be widely used in fields such as sun power, underground heat storage and various kiln waste heat recovery.
Background technology
When material fusion or crystallization; The capital is with the absorption or the release of heat; For example liquid water can discharge a large amount of heat energy and transform into solid water (ice) in the time of 0 ℃; Can absorb great amount of heat energy and transform into vaporous water (water vapor) at 100 ℃ and depress liquid water at standard atmosphere, this type material can be used for thermal energy storage or the release under the specified temp, and we are referred to as energy storage material.
But in fact not all material can both be followed this rule; Most of materials can not change into solid-state immediately when temperature is reduced to its Tc under liquid state; But certain temperature-curable below Tc and discharge its latent heat; Theoretical Tc promptly is referred to as condensate depression with the difference of actual Tc, condensate depression severe patient even can be up to tens of degree, and this will cause heat of energy storage material storage effectively not discharge as required; Some material is then because problems such as self solubleness, evaporation make crystallization and melt two processes irreversible; Can not be used for the storage of heat energy: for example its fusing point of the hexahydrate of magnesium nitrate is 90～95 ℃; This temperature is near the boiling point (100 ℃) of water; Water loss is serious, the continuous decrement of heat storage capacity in the time of can causing crystallization once more.
Crystallization is a kind of physical phenomenon of microcosmic; Influencing the crystalline factor has a lot, and dust or slight vibration just might cause crystallization, for further improving the crystalline determinacy; Use the crystallization behavior of energy storage material controlled, orderly; Overcome the too high problems such as energy storage material life-span decay that cause of temperature simultaneously, the present invention has announced a kind of compsn that mainly is made up of magnesium nitrate, magnesium chloride and water, under the acting in conjunction of additives such as urea, sal epsom, magnesiumcarbonate, fumed silica; Its Tc can be reduced to 57～60 ℃, and can keep its latent heat of fusion at 200kJ/kg.
Summary of the invention
The object of the present invention is to provide a kind of 58 ℃ of energy storage material compsns, its Tc is 57～60 ℃, and the latent heat of fusion is about 200kJ/kg.Can be used for the intermittently fields such as waste heat recovery such as storage, Industrial Stoves of the energy such as sun power.
For realizing above-mentioned purpose of the present invention, the invention provides a kind of energy storage material compsn, staple comprises Mg (NO
3)
2, MgCl
2, H
2O and CO (NH
2)
2, MgSO
4, MgCO
3, vapor phase process SiO
2Deng functional additive.
Mg (NO in said composition
3)
2, MgCl
2, H
2O is a main ingredient, Mg (NO
3)
2Mass content is 27.4～36.2%, MgCl
2Mass content is 11.6～17.6%, H
2The O mass content is 36～40%, wherein Mg (NO
3)
2, MgCl
2Mol ratio is 1: 1～2: 1, Mg (NO
3)
2, H
2The O mol ratio is 1: 6, MgCl
2, H
2The O mol ratio is 1: 6, and the ratio of other additive is following:
Phase change material compsn provided by the present invention has been carried out Tc, condensate depression test according to the cooling curve method, and with its latent heat of fusion of DSC differential scanning calorimeter test.Simultaneously, adopt the quiescence in high temperature method, be put in 70 ℃ of conditions following 48 hours, observe its insoluble situation that salts out to the phase transformation stability problem.
Embodiment
The present invention can make those skilled in the art more comprehensively understand the present invention, but not limit the present invention in any way through the present invention of following specific embodiment more detailed description.
Embodiment 1
400 gram water are heated to 90 ℃, then successively with 274 gram Mg (NO
3)
2, 176 the gram MgCl
2, 60 gram CO (NH
2)
2, 30 the gram MgSO
4, 10 the gram MgCO
3Be added to the water successively, add 50 gram vapor phase process SiO after dissolving finishes
2High-speed stirring, treat solution system stable after static at normal temperatures depositing 72 hours.According to its Tc of cooling curve method test is 58.2 ℃, and condensate depression is 4 ℃, and latent heat of fusion is 196kJ/kg, and phenomenon is separated out in 70 ℃ of condition held 48 hours, no obvious layering, and system is more stable.
Embodiment 2
59.55 kg water are heated to 90 ℃, then successively with 54.3 kilograms of Mg (NO
3)
2, 17.4 kilograms of MgCl
2, 7.5 kilograms of CO (NH
2)
2, 9 kilograms of MgSO
4, 750 the gram MgCO
3Be added to the water successively, add 1.5 kilograms of vapor phase process SiO after dissolving finishes
2High-speed stirring, treat solution system stable after static at normal temperatures depositing 72 hours.According to its Tc of cooling curve method test is 59.0 ℃, and condensate depression is 4.8 ℃, and latent heat of fusion is 204kJ/kg, and phenomenon is separated out in 70 ℃ of condition held 48 hours, no obvious layering, and system is more stable.
Embodiment 3
108 gram water are heated to 90 ℃, then successively with 88.5 gram Mg (NO
3)
2, 38.1 the gram MgCl
2, 30 gram CO (NH
2)
2, 24 the gram MgSO
4, 2.4 the gram MgCO
3Be added to the water successively, add 9 gram vapor phase process SiO after dissolving finishes
2High-speed stirring, treat solution system stable after static at normal temperatures depositing 72 hours.According to its Tc of cooling curve method test is 57.5 ℃, and condensate depression is 3.8 ℃, and latent heat of fusion is 201kJ/kg, and phenomenon is separated out in 70 ℃ of condition held 48 hours, no obvious layering, and system is more stable.
Embodiment 4
29.84 kg water are heated to 90 ℃, then successively with 22.24 kilograms of Mg (NO
3)
2, 11.92 kilograms of MgCl
2, 6.4 kilograms of CO (NH
2)
2, 5.84 kilograms of MgSO
4, 480 the gram MgCO
3Be added to the water successively, add 3.28 kilograms of vapor phase process SiO after dissolving finishes
2High-speed stirring, treat solution system stable after static at normal temperatures depositing 72 hours.According to its Tc of cooling curve method test is 58.5 ℃, and condensate depression is 4.2 ℃, and latent heat of fusion is 211kJ/kg, and phenomenon is separated out in 70 ℃ of condition held 48 hours, no obvious layering, and system is more stable.
Embodiment 5
385 gram water are heated to 90 ℃, then successively with 339 gram Mg (NO
3)
2, 121 the gram MgCl
2, 72 gram CO (NH
2)
2, 53 the gram MgSO
4, 7 the gram MgCO
3Be added to the water successively, add 23 gram vapor phase process SiO after dissolving finishes
2High-speed stirring, treat solution system stable after static at normal temperatures depositing 72 hours.According to its Tc of cooling curve method test is 58.9 ℃, and condensate depression is 2.7 ℃, and latent heat of fusion is 206kJ/kg, and phenomenon is separated out in 70 ℃ of condition held 48 hours, no obvious layering, and system is more stable.
Comparative Examples 1
389 gram water are heated to 90 ℃, then successively with 400 gram Mg (NO
3)
2, 86 the gram MgCl
2, 50 gram CO (NH
2)
2, 60 the gram MgSO
4, 5 the gram MgCO
3Be added to the water successively, add 10 gram vapor phase process SiO after dissolving finishes
2High-speed stirring, treat solution system stable after static at normal temperatures depositing 72 hours.According to its Tc of cooling curve method test, crystallisation process is slow, crystallization occurs until 55 ℃ of complete crystallizations, the tangible fixedly Tc of nothing since 90 ℃.
Comparative Examples 2
385 gram water are heated to 90 ℃, then successively with 339 gram Mg (NO
3) x, 121 the gram MgCl
2, 53 the gram MgSO
4, 7 the gram MgCO
3Be added to the water successively, add 23 gram vapor phase process SiO after dissolving finishes
2High-speed stirring, treat solution system stable after static at normal temperatures depositing 72 hours.According to its Tc of cooling curve method test, temperature is reduced to 70 ℃ and is begun to occur crystallization, and final Tc is constant in 85 ℃, and condensate depression is about 15 ℃, and 70 ℃ of condition held 48 hours, said composition do not melt.
Comparative Examples 3
385 gram water are heated to 90 ℃, then successively with 339 gram Mg (NO
3)
2, 121 the gram MgCl
2, 72 gram CO (NH
2)
2, 53 the gram MgSO
4, 7 the gram MgCO
3Be added to the water successively, dissolve static at normal temperatures the depositing 72 hours that finish.According to its Tc of cooling curve method test is 58.4 ℃, and condensate depression is 3.6 ℃, and latent heat of fusion is 209kJ/kg, 70 ℃ of condition held 48 hours, and demixing phenomenon is comparatively obvious.
Through the foregoing description 1～5, the Tc of 58 ℃ of energy storage material compsns disclosed by the invention is 57～60 ℃, and condensate depression all is lower than 5 ℃, and system is more stable, obvious layering Problem of Failure do not occur.Comparative Examples 1 shows, Mg (NO
3)
2, MgCl
2After having adjusted ratio, no fixed Tc is not added CO (NH in Comparative Examples 2
2)
2, cause the system Tc higher, removed vapor phase process SiO on the basis of experiment in front in the Comparative Examples 3
2, demixing phenomenon has appearred in the bad stability of this combination.
The above is merely preferred embodiment of the present invention, is not to be used for limiting practical range of the present invention, so all variations that is equal to according to characteristic raw material, characterization step and the prescription of scope according to the invention all should be included within the claim of the present invention.
Claims (7)
1. 58 ℃ of energy storage material compsns according to the invention is characterized in that containing Mg (NO
3)
2, MgCl
2, H
2O and CO (NH
2)
2, MgSO
4, MgCO
3, vapor phase process SiO
2Deng functional additive.
2. compsn according to claim 1 is characterised in that the main ingredient that constitutes energy storage material is Mg (NO
3)
2, MgCl
2, H
2O.
3. MgCl in the main ingredient according to claim 2
2And MgCl
2Mol ratio be 1: 1～2: 1.
4. Mg (NO in the main ingredient according to claim 2
3)
2With the mol ratio of water be 1: 6.
5. MgCl in the main ingredient according to claim 2
2With the mol ratio of water be 1: 6.
6. the mass content of main ingredient according to claim 2 is following:
Mg(NO
3)
2 27.4～36.2％
MgCl
2 11.6～17.6％
H
2O 36～40％
7. compsn according to claim 1 is characterized in that the weight ratio of each functional additive is following:
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103161152A CN102786913A (en) | 2012-08-31 | 2012-08-31 | Energy storage material composition of 58 DEG C |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103161152A CN102786913A (en) | 2012-08-31 | 2012-08-31 | Energy storage material composition of 58 DEG C |
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|---|---|
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|---|---|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108485610A (en) * | 2018-04-19 | 2018-09-04 | 华南理工大学 | Organic-inorganic composite phase-change material based on magnesium nitrate hexahydrate and preparation method thereof |
| CN108753263A (en) * | 2018-07-15 | 2018-11-06 | 北京电管家科技股份有限公司 | The inorganic phase-changing material and preparation method thereof that phase transition temperature is 60 DEG C |
-
2012
- 2012-08-31 CN CN2012103161152A patent/CN102786913A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108485610A (en) * | 2018-04-19 | 2018-09-04 | 华南理工大学 | Organic-inorganic composite phase-change material based on magnesium nitrate hexahydrate and preparation method thereof |
| CN108753263A (en) * | 2018-07-15 | 2018-11-06 | 北京电管家科技股份有限公司 | The inorganic phase-changing material and preparation method thereof that phase transition temperature is 60 DEG C |
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Application publication date: 20121121 |