CN109233752A - A kind of inorganic hydrated salt composite phase-change heat-storage material and preparation method thereof - Google Patents
A kind of inorganic hydrated salt composite phase-change heat-storage material and preparation method thereof Download PDFInfo
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- CN109233752A CN109233752A CN201811373644.XA CN201811373644A CN109233752A CN 109233752 A CN109233752 A CN 109233752A CN 201811373644 A CN201811373644 A CN 201811373644A CN 109233752 A CN109233752 A CN 109233752A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/06—Materials undergoing a change of physical state when used the change of state being from liquid to solid or vice versa
- C09K5/063—Materials absorbing or liberating heat during crystallisation; Heat storage materials
Abstract
The present invention provides a kind of inorganic hydrated salt composite phase-change heat-storage materials and preparation method thereof, which is at least made of magnesium nitrate hexahydrate and magnesium chloride hexahydrate, and the mass percent of two kinds of components is respectively 92%-99% and 1%-8%.Preparation method is the mixture for being mixed into two kinds of components in proportion, is uniformly mixed after finely ground in mortar, and then sealing, which is put into 100 DEG C of constant temperature bath, is heated to being completely melt state, stirs evenly to form eutectic mixture.Phase-change heat-storage material of the invention is by the way that after additive agent modified, composite material has lesser degree of supercooling, and latent heat of phase change is big, and stability is high, no phenomenon of phase separation, and preparation process is simple, convenient for encapsulation and production.
Description
Technical field
The present invention relates to material engineering field more particularly to a kind of inorganic hydrated salt composite phase-change heat-storage material and its preparations
Method.
Background technique
Heat storage technology is the important technology for improving efficiency of energy utilization and protecting environment, and can be used for solving thermal energy needs for giving
The contradiction for seeking mismatch is built in the recycling and industry of Solar use, electric power " peak load shifting ", waste heat and waste heat with civilian
The fields such as the energy conservation with air-conditioning are built to be with a wide range of applications.Phase-transition heat-storage is absorbed or is put in phase transition process using substance
The principle of latent heat of phase change carries out energy storage and release out, using unit mass (volume) latent heat when phase-change heat-storage material phase transformation,
Amount of stored heat is very big, swift and violent for the research of phase-change heat-storage material and application development in recent years.
The present invention mainly proposes that a kind of preparation process is simple, convenient for the preparation side for the phase-change heat-storage material for encapsulating and producing
Method.
Summary of the invention
The purpose of the present invention is to solve disadvantages existing in the prior art, and a kind of inorganic hydrated salt proposed is compound
Phase-change heat-storage material and preparation method thereof.
To achieve the goals above, present invention employs following technical solutions:
A kind of inorganic hydrated salt composite phase-change heat-storage material and preparation method thereof, the heat accumulating is at least by magnesium nitrate hexahydrate
It is formed with magnesium chloride hexahydrate, the mass percent of two kinds of components is respectively 92%-99% and 1%-8%.Preparation method is by two
The mixture that kind component is mixed into proportion is uniformly mixed after finely ground in mortar, and then sealing is put into 100 DEG C of constant temperature oil bath
In be heated to being completely melt state, stir evenly to form eutectic mixture.
The latent heat of phase change value for preparing finished product is 137-148kJ/kg, and phase transition temperature is 80-89 DEG C, and degree of supercooling is less than 4 DEG C.
Compared with prior art, the beneficial effects of the present invention are: phase-change heat-storage material of the invention is by additive agent modified
Afterwards, composite material has lesser degree of supercooling, and latent heat of phase change is big, and stability is high, no phenomenon of phase separation, and preparation process is simple,
Convenient for encapsulating and producing.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.
A kind of inorganic hydrated salt composite phase-change heat-storage material and preparation method thereof, the heat accumulating is at least by magnesium nitrate hexahydrate
It is formed with magnesium chloride hexahydrate, the mass percent of two kinds of components is respectively 92%-99% and 1%-8%.Preparation method is by two
The mixture that kind of component is mixed into proportion is uniformly mixed after finely ground in mortar, then sealing be put into 100 DEG C thermostatical oil/
It is heated to being completely melt state in water-bath, stirs evenly to form eutectic mixture.
The latent heat of phase change value for preparing finished product is 137-148kJ/kg, and phase transition temperature is 80-89 DEG C, and degree of supercooling is less than 4 DEG C.
Embodiment one
Respectively 94% and 6% ratio weighs magnesium nitrate hexahydrate and magnesium chloride hexahydrate by mass percentage, is then grinding
It is finely ground rear uniformly mixed in alms bowl, mixture sealing is put into 100 DEG C of constant temperature oil bath and is heated, each component is made to be completely melt to become
Liquid, by liquid agitation it is uniform after be injected into container, the volume of injection is the 92% of container volume, stays 8% in container
Expansion space, the sealing container after liquid is cooled to room temperature.
Being tested phase-change heat-storage material enthalpy of phase change manufactured in the present embodiment is 145kJ/kg, and phase transition temperature is 84 DEG C, supercooling
Degree is 3.3 DEG C.
Embodiment two
Respectively 96% and 4% ratio weighs magnesium nitrate hexahydrate and magnesium chloride hexahydrate by mass percentage, is then grinding
It is finely ground rear uniformly mixed in alms bowl, mixture sealing is put into 100 DEG C of thermostatical oil/water-bath and is heated, is completely melt each component
As liquid, by liquid agitation it is uniform after be injected into container, the volume of injection is the 92% of container volume, is stayed in container
8% expansion space, the sealing container after liquid is cooled to room temperature.
Being tested phase-change heat-storage material enthalpy of phase change manufactured in the present embodiment is 147kJ/kg, and phase transition temperature is 86 DEG C, supercooling
Degree is 3.6 DEG C.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (5)
1. a kind of inorganic hydrated salt composite phase-change heat-storage material, which is characterized in that the heat accumulating at least by magnesium nitrate hexahydrate and
Magnesium chloride hexahydrate composition, the mass percent of two kinds of components is respectively 92%-99% and 1%-8%.
2. a kind of inorganic hydrated salt composite phase-change heat-storage material according to claim 1, which is characterized in that the six water nitre
The mass percent of sour magnesium and magnesium chloride hexahydrate is respectively 94% and 6%.
3. a kind of inorganic hydrated salt composite phase-change heat-storage material according to claim 1, which is characterized in that the six water nitre
The mass percent of sour magnesium and magnesium chloride hexahydrate is respectively 96% and 4%.
4. a kind of preparation method of inorganic hydrated salt composite phase-change heat-storage material, which comprises the following steps:
S1, magnesium nitrate hexahydrate and magnesium chloride hexahydrate are weighed, it is then finely ground rear uniformly mixed in mortar, obtain mixture；
S2, the sealing of mixture obtained in step S1 is put into 90-110 DEG C of constant temperature bath and is heated, be completely melt each component
Uniform stirring is carried out as liquid, and to it；
S3, by the liquid agitation in step S2 it is uniform after be injected into container, a certain amount of expansion space is reserved in container, and
Container is sealed, gelatinous eutectic mixture forms phase change heat storage material in container.
5. a kind of preparation method of inorganic hydrated salt composite phase-change heat-storage material according to claim 4, which is characterized in that
The volume of fluid injected in the step S3 is the 85-95% of container volume, and the expansion space of 5-15% is stayed in container.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811373644.XA CN109233752A (en) | 2018-11-21 | 2018-11-21 | A kind of inorganic hydrated salt composite phase-change heat-storage material and preparation method thereof |
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| CN201811373644.XA CN109233752A (en) | 2018-11-21 | 2018-11-21 | A kind of inorganic hydrated salt composite phase-change heat-storage material and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109609098A (en) * | 2018-12-12 | 2019-04-12 | 上海交通大学 | A kind of composite phase-change heat-storage material and its preparation |
| CN110066642A (en) * | 2019-04-09 | 2019-07-30 | 中国科学院过程工程研究所 | 89 ± 7 DEG C of phase transition temperature of phase-changing energy storage material and preparation method thereof |
| CN113355057A (en) * | 2021-06-30 | 2021-09-07 | 中国科学院青海盐湖研究所 | Method for improving phase change heat storage performance of industrial-grade hydrated salt |
| CN113980652A (en) * | 2021-11-05 | 2022-01-28 | 北京科技大学 | Consistent-melting composite phase-change material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109609098A (en) * | 2018-12-12 | 2019-04-12 | 上海交通大学 | A kind of composite phase-change heat-storage material and its preparation |
| CN110066642A (en) * | 2019-04-09 | 2019-07-30 | 中国科学院过程工程研究所 | 89 ± 7 DEG C of phase transition temperature of phase-changing energy storage material and preparation method thereof |
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| CN113355057A (en) * | 2021-06-30 | 2021-09-07 | 中国科学院青海盐湖研究所 | Method for improving phase change heat storage performance of industrial-grade hydrated salt |
| CN113980652A (en) * | 2021-11-05 | 2022-01-28 | 北京科技大学 | Consistent-melting composite phase-change material and preparation method thereof |
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