CN1940006B - Heat-storage medium and its use - Google Patents
Heat-storage medium and its use Download PDFInfo
- Publication number
- CN1940006B CN1940006B CN2006101045838A CN200610104583A CN1940006B CN 1940006 B CN1940006 B CN 1940006B CN 2006101045838 A CN2006101045838 A CN 2006101045838A CN 200610104583 A CN200610104583 A CN 200610104583A CN 1940006 B CN1940006 B CN 1940006B
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- Prior art keywords
- heat
- storage medium
- water
- magnesium
- magnesium chloride
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- Thermotherapy And Cooling Therapy Devices (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Central Heating Systems (AREA)
Abstract
A heat-retaining medium and its use are disclosed. The medium consists of magnesium chloride 10-13wt%, magnesium nitrate 48-53wt% and H2O 36-40wt%. It can be used to thermal-insulating layer on top of building and household energy-storing heater.
Description
Technical field
The present invention relates to a kind of phase change material, relate in particular to a kind of heat-storage medium preparation method and its usage with phase deformation type heat energy storage.
Background technology
The phase-change thermal storage medium is by melting and the automatic a large amount of heat of absorbing environmental by self under the environment that is higher than its distinctive phase transformation melt temperature, and being lower than self-refrigeration under its distinctive transformation temperature environment to the environment release of heat, thereby keep the homo(io)thermism of environment, reach the purpose of energy storage.
Material as the phase-change thermal storage medium can be anhydrous salt, salt water chemical compound and composition thereof, organism etc.Wherein organism easily brings fire hazard when using; Anhydrous salt or their mixture are applicable to high-temperature heat-storage; Salt water chemical compound and composition thereof is suitable for storing low-temperature heat source, and this type of material is in sun power and city UTILIZATION OF VESIDUAL HEAT IN, and many-sides such as the peak load shifting of electrical network have a wide range of applications.
Judge that the good and bad standard of a kind of heat-storage medium has: transformation temperature, the toxicity of phase change material, corrodibility, superfusibility energy, laminarity, cheapness or the like.And the phase change material that satisfies above-mentioned all requirements simultaneously is actually rare.
The material of fusing point about 40 ℃ is commonly used for the heating medium in winter, summer is as the thermofin of buildings attic.Common salt water chemical compound about this temperature has four water calcium chloride (39 ℃), four water-calcium nitrate (42 ℃) and two water Potassium monofluorides (42 ℃).But Peritectic Reaction takes place in four water calcium chloride when 39 ℃ of fusings, be not suitable for use in energy storage material; The four water-calcium nitrate melt is very strong 42 ℃ of cold effects of mistake, needs to add relevant nucleator crystallization in time; Two water Potassium monofluoride costlinesses and corrodibility are strong, and is improper as energy storage or lagging material.
A kind of salt water chemical compound common in the practical application is by MgCl
2* 6H
2O and Mg (NO
3)
2* 6H
2O mixes by a certain percentage and obtains, and its fusing point is 56 ℃.By magnesium chloride, the salt water chemical compound that the eutectic melting temperature that magnesium nitrate and water are formed is different from said temperature does not then appear in the newspapers.
Summary of the invention
The present invention is in order to solve the weak point of above-mentioned prior art, and a kind of to have toxicity little and provide, cheapness, and corrodibility is little, no superfusibility energy, heat-storage medium of plurality of advantages such as no laminarity and preparation method thereof.This heat-storage medium is by magnesium chloride, and the eutectic melting temperature that magnesium nitrate and water are formed is different from the salt water chemical compound of said temperature.The constant temperature that is applied to buildings is heat insulation, domestic heating device etc.
A kind of heat-storage medium of the present invention, it is characterized in that it is to be modulated into melt or crystal and the tertiary mixture that forms by water, magnesium nitrate and magnesium chloride through prescription, wherein: by magnesium nitrate 48-53 weight %, magnesium chloride 10-13 weight %, water: 36-40 weight % forms.
This heat-storage medium encapsulates.
The method for preparing heat-storage medium with magnesium chloride, magnesium nitrate or their hydrate and water mixed melting or evaporate a certain amount of moisture, is modulated into melt or mixed crystal.
The purposes of heat-storage medium of the present invention is not must be with auxiliary, as the storage medium in the latent heat storage system.
One of purposes of heat-storage medium is that to be used in the house top layer heat insulation.
One of purposes of heat-storage medium is to be used in family's heating with in the energy storage device.
The method for preparing this heat-storage medium is that magnesium nitrate and magnesium chloride (perhaps their various forms of hydrates) are mixed, and regulates media components to aforesaid content by adding entry (as the excess moisture part moisture in the evaporating solns then).
Its mechanism of action is, shown in E2 point among Fig. 1, has an eutectic point of being made up of magnesium nitrate hexahydrate, two water magnesium nitrates and magnesium chloride hexahydrate that is not in the news in magnesium chloride-magnesium nitrate-water ternary system, and the eutectic temperature of this point is about 41 ℃.
The effect of invention: it is little that this energy-accumulating medium has toxicity, and cheapness is nonflammable, no superfusibility energy, plurality of advantages such as no laminarity.
Description of drawings
Fig. 1 magnesium nitrate-magnesium chloride-aqueous systems solubleness phasor.
E1 among the figure: known fusing point is the energy storage material about 56 ℃, E2: the protected in the present invention eutectic point as energy-accumulating medium.
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Embodiment
Embodiment one:
78 kilograms of magnesium nitrate hexahydrates and 22 kilograms of magnesium chloride hexahydrates are mixed, heated solution evaporates about 10 kilograms moisture wherein then, gained solution will be at 39 ℃～41 ℃ mixtures that are condensed into salt water chemical compound (magnesium nitrate hexahydrate, magnesium chloride hexahydrate and two water magnesium nitrates), and the fusing point of this mixture is 40 ± 1.5 ℃.
Embodiment two:
Get a certain amount of mixture of making by the method for embodiment one description and put in certain sealed vessel, be heated to 45 ℃ by room temperature (25 ℃), the sensible heat of its storage is equivalent to 300% of same weight pure water store heat; Be heated to 70 ℃ by room temperature (25 ℃), the heat of its storage is equivalent to 200% of same weight pure water store heat.At room temperature, the temperature of cooling certainweight is to be more than 2.5 times of the same pure water required time of the same weight of cooling 70 ℃ of these energy storage mixtures to the required time of room temperature.As replace the water in domestic hot water's bag commonly used with this heat-storage medium, prolonged more than one times the cooling time of hot-water bottle, and its temperature remain between 39 ℃～41 ℃ in the overwhelming majority time, the body sense is as snug as a bug in a rug.
Above embodiment is detailed explanation the present invention, and the present invention is not limited to embodiment, and the heat-storage medium of being done according to the present invention's prescription all is a scope of protection of the invention.
Claims (5)
1. heat-storage medium is characterized in that it is to be modulated into melt or crystal and the tertiary mixture that forms by water, magnesium nitrate and magnesium chloride through prescription, wherein: by magnesium nitrate 48-53 weight %, magnesium chloride 10-13 weight %, water: 36-40 weight % forms.
2. heat-storage medium according to claim 1 is characterized in that this heat-storage medium encapsulates.
3. the method for preparing the described heat-storage medium of claim 1 is characterized in that magnesium chloride, magnesium nitrate or their hydrate and water mixed melting or evaporates a certain amount of moisture, is modulated into melt or mixed crystal.
4. according to one of purposes of the described heat-storage medium of claim 1, be that to be used in the house top layer heat insulation.
5. according to one of purposes of the described heat-storage medium of claim 1, be to be used in family's heating with in the energy storage device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101045838A CN1940006B (en) | 2006-09-12 | 2006-09-12 | Heat-storage medium and its use |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101045838A CN1940006B (en) | 2006-09-12 | 2006-09-12 | Heat-storage medium and its use |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1940006A CN1940006A (en) | 2007-04-04 |
| CN1940006B true CN1940006B (en) | 2011-06-22 |
Family
ID=37958535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006101045838A Expired - Fee Related CN1940006B (en) | 2006-09-12 | 2006-09-12 | Heat-storage medium and its use |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1940006B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106221675A (en) * | 2016-07-27 | 2016-12-14 | 中国科学院青海盐湖研究所 | A kind of phase-change and energy-storage medium |
| CN109233752A (en) * | 2018-11-21 | 2019-01-18 | 江苏昂彼特堡能源科技有限公司 | A kind of inorganic hydrated salt composite phase-change heat-storage material and preparation method thereof |
| CN109609098B (en) * | 2018-12-12 | 2021-01-22 | 上海交通大学 | Composite phase-change heat storage material and preparation thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4273666A (en) * | 1979-11-02 | 1981-06-16 | The Dow Chemical Company | Hydrated Mg(NO3)2 reversible phase change compositions |
| US4329242A (en) * | 1980-12-22 | 1982-05-11 | The Dow Chemical Company | Hydrated Mg(NO3)2 /MgCl2 reversible phase change compositions |
| EP0054758A1 (en) * | 1980-12-22 | 1982-06-30 | The Dow Chemical Company | Hydrated MgCl2 or Mg(NO3)2/MgCl2 reversible phase change compositions |
-
2006
- 2006-09-12 CN CN2006101045838A patent/CN1940006B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4273666A (en) * | 1979-11-02 | 1981-06-16 | The Dow Chemical Company | Hydrated Mg(NO3)2 reversible phase change compositions |
| US4329242A (en) * | 1980-12-22 | 1982-05-11 | The Dow Chemical Company | Hydrated Mg(NO3)2 /MgCl2 reversible phase change compositions |
| EP0054758A1 (en) * | 1980-12-22 | 1982-06-30 | The Dow Chemical Company | Hydrated MgCl2 or Mg(NO3)2/MgCl2 reversible phase change compositions |
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| Publication number | Publication date |
|---|---|
| CN1940006A (en) | 2007-04-04 |
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