CN106221675A - A kind of phase-change and energy-storage medium - Google Patents
A kind of phase-change and energy-storage medium Download PDFInfo
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- CN106221675A CN106221675A CN201610598749.XA CN201610598749A CN106221675A CN 106221675 A CN106221675 A CN 106221675A CN 201610598749 A CN201610598749 A CN 201610598749A CN 106221675 A CN106221675 A CN 106221675A
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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
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Abstract
The invention discloses a kind of phase-change and energy-storage medium at room temperature, described phase-change and energy-storage medium includes the eutectic mixture being made up of water, calcium chloride, magnesium chloride and magnesium nitrate.The preparation method of described phase-change and energy-storage medium is: all melted by proportioning Hybrid Heating by mentioned component, and stir a certain amount of six water strontium chloride and carboxymethyl celluloses of addition, and this liquid phase can be used as phase-change and energy-storage medium and uses.The phase-change and energy-storage medium of the present invention has phase transition temperature near room temperature, the feature such as material environment friendly and low cost.
Description
Technical field
The present invention relates to energy-conserving and environment-protective field, be specifically related to a kind of phase-change and energy-storage medium storing heat energy with phase transition forms.
Background technology
General, phase transition temperature Tm material in the range of-50-90 DEG C is divided into normal low temperature phase change heat accumulating, this type of
Material application in building and daily life is relatively broad.The phase transition temperature material less than 15 DEG C is mainly used in air-conditioning system
Cold, phase transition temperature material between 15-90 DEG C is then widely used in solar energy heat-storage and heat load field.
Often the mechanism of action of low-temperature phase-change energy-storing material is: when temperature is slightly above phase transition temperature, phase-change and energy-storage medium from
Environment absorbs amount of heat and melts, energy storage is got up, when temperature is less than phase transition temperature, the room temperature phase-change melted
Energy-accumulating medium is condensed into solid and discharges substantial amounts of heat to indoor environment, thus maintains the relative constancy of room temperature.At temperature difference per day
Or the biggest area of week (per week) temperature difference, phase-change and energy-storage medium at room temperature has important using value, and it can be in the high temperature period
Store energy, and in night or colder period to indoor heating, thus reach energy-conservation purpose.
Preferably phase-changing energy storage material typically should have the fusing point of relative constancy, be so only possible to when ambient temperature higher than or
During less than phase transition temperature, energy storage material absorbs or to Environment release energy from environment as much as possible.This feature is for energy storage
Material absorbs energy from low-grade solar energy and maintains the constant significant of room temperature.
Material as phase-change and energy-storage medium can be anhydrous salt, salt water chemical compound and mixture, Organic substance etc..And mesh
The front Organic substance being used as room temperature phase-change energy-storage material has dangerous inflammable, expensive, the shortcomings such as heat conductivity is bad；Anhydrous fused salt
It is applicable to high-temperature heat-storage；Salt water chemical compound and mixture thereof are suitable for storing low-temperature heat source, and these materials are in solar energy and city
UTILIZATION OF VESIDUAL HEAT IN, the many-side such as peak load shifting of electrical network has a wide range of applications.Still suffer from present needing exploitation to be specifically designed for room temperature
Necessity of energy storage material.
Summary of the invention
It is an object of the invention to provide a kind of New-type phase change energy-accumulating medium, this phase-change and energy-storage medium should possess phase alternating temperature
Spend feature more moderate and with low cost.
The phase-change and energy-storage medium that the present invention provides includes the eutectic mixing being made up of water, calcium chloride, magnesium chloride and magnesium nitrate
Thing.
Preferably, this eutectic mixture is contained within six water strontium chloride and carboxymethyl celluloses, wherein six water strontium chloride conducts
Nucleator, carboxymethyl cellulose is as thickening agent.
Preferably, the composition of described eutectic mixture is equivalent to by 90wt.% calcium chloride hexahydrate, 7-7.5wt.% six water
The composition of the mixture that magnesium chloride and 2.5-3wt.% magnesium nitrate hexahydrate are formed.
It is furthermore preferred that SrCl in described energy-accumulating medium2·6H2O content be 1-1.5wt.%, CMC content be 3%-4wt%.
Preferably, the raw material of described energy-accumulating medium is made up of calcium chloride, magnesium chloride, magnesium nitrate, strontium chloride and water, or phase
Answer hydrate and/or the water composition of material.
Preferably, the eutectic phase temperature of described eutectic mixture is 25-26 degree Celsius.
The raw material herein preparing energy-accumulating medium can be calcium chloride, magnesium chloride, magnesium nitrate and water；Can also be containing crystallization
The calcium chloride of water, the magnesium chloride containing water of crystallization and the magnesium nitrate containing water of crystallization；Can also be constituent part be containing crystallization
The compound of water, remainder is corresponding water-free compound；As long as the composition of its raw material is equivalent to by calcium chloride hexahydrate, six
Aqueous magnesium chloride and the formed mixture of magnesium nitrate hexahydrate, it just can form the eutectic mixture of the present invention.
Preferably, the raw material of described energy-accumulating medium is made up of calcium chloride, magnesium chloride, magnesium nitrate and water, or corresponding thing
The hydrate of matter and/or water composition.
Preferably, the eutectic phase temperature of described eutectic mixture is 25-26 DEG C of degrees centigrade.
Calcium chloride hexahydrate+magnesium chloride hexahydrate+magnesium nitrate hexahydrate the system of above-mentioned material composition exists a composition point, should
The phase transition temperature of point is about 25-26 DEG C.
This energy-accumulating medium is packaged in the hermetic container being made up of various materials, is placed in Indoor environment or body of wall,
For regulating indoor temperature, a comfortable temperature range can be kept it in.
The phase-change and energy-storage medium at room temperature of the present invention has that phase transformation temperature points is stable, phase transformation time solid phase composition form one with liquid phase
Cause, phase transformation varies with temperature the plurality of advantages such as sensitivity.When ambient temperature is higher than 26 DEG C, the thawing by self of this energy storage material
Absorbing heat in large quantities from environment, when ambient temperature is less than 25 DEG C, energy storage material is slowly crystallized into solid phase, Xiang Huan by liquid phase
Border discharges substantial amounts of heat, thus maintains stablizing of ambient temperature.
Accompanying drawing explanation
Exothermic temperature curve chart inhaled by Fig. 1, the energy storage material of embodiment 1.
Exothermic temperature curve chart inhaled by Fig. 2, the energy storage material of embodiment 2.Exothermic temperature curve chart inhaled by Fig. 3, energy storage material 1.
Exothermic temperature curve chart inhaled by Fig. 4, energy storage material 2.
Detailed description of the invention
The following is embodiments of the invention, it is used only as explanation of the invention and and unrestricted.
The phase-change and energy-storage medium that below embodiment provides includes the eutectic being made up of water, calcium chloride, magnesium chloride and magnesium nitrate
Mixture, its eutectic phase temperature is 25-26 degree Celsius.
Embodiment 1:
72 grams of calcium chloride hexahydrates, 6 grams of magnesium chloride hexahydrates, 2 grams of magnesium nitrate hexahydrate Hybrid Heating thawings are obtained 80 grams of mixing
Solution, stirs addition 1g six water strontium chloride and 4g CMC in this liquid to be loaded in hermetic container, this container is placed in 13
DEG C air ambient in, record medium temperature change as shown in Fig. 1 thick line, it is seen then that system when temperature is down to 25 DEG C, start
Undergoing phase transition, an obvious temperature platform occur at about 25.2 DEG C, this is to solidify at this temperature to ring due to medium
Border discharges substantial amounts of heat, thus maintains stablizing of own temperature.Then the container equipped with energy-accumulating medium is placed on the ring of 38 DEG C
Heating up in border, medium be can be observed and there is an intensification platform when 27 DEG C, this is that medium a large amount of heats that absorb from environment melt
Change, thus maintain the constant of ambient temperature.After 27 DEG C, medium melts completely, heats up rapidly.
Repeat said process with the pure water of same weight, record its temperature lift-down curve as shown in Fig. 1 fine rule, it is seen that water is very
I.e. reaching ambient temperature in short time, constant temperature is limited in one's ability.
Comparing both visible, the energy-accumulating medium of the present invention can absorb substantial amounts of heat, Yi Jixiang from the environment higher than 27 DEG C
Less than the heat of 25 DEG C of Environment release, thus maintain the constant of medium itself and ambient temperature, its temperature adjusting ability than
Pure water is many times greater.
Embodiment 2:
72 grams of calcium chloride hexahydrates, 5.6 grams of magnesium chloride hexahydrates, 2.4 grams of magnesium nitrate hexahydrate Hybrid Heating thawings are obtained 80 grams
Mixed solution, stirs and is loaded in hermetic container, addition 1.2g six water strontium chloride and 3g CMC in this liquid by this container
It is placed in the air ambient of 13 DEG C, records medium temperature and change as shown in Fig. 2 thick line, it is seen then that system is down to 23.6 DEG C in temperature
Time, starting to undergo phase transition, at about 25.1 DEG C, an obvious temperature platform occurs, this is due to medium at this temperature
Solidification is to the substantial amounts of heat of Environment release, thus maintains stablizing of own temperature.Then the container equipped with energy-accumulating medium is placed on
Heating up in the environment of 38 DEG C, medium be can be observed and there is an intensification platform when 27 DEG C, this is that medium is inhaled from environment in a large number
Receipts heat melts, thus maintains the constant of ambient temperature.After 27 DEG C, medium melts completely, heats up rapidly.
Repeat said process with the pure water of same weight, record its temperature lift-down curve as shown in Fig. 2 fine rule, it is seen that water is very
I.e. reaching ambient temperature in short time, constant temperature is limited in one's ability.
Comparing both visible, the energy-accumulating medium of the present invention can absorb substantial amounts of heat, Yi Jixiang from the environment higher than 27 DEG C
Less than the heat of 25 DEG C of Environment release, thus maintain the constant of medium itself and ambient temperature, its temperature adjusting ability than
Pure water is many times greater.
In above-mentioned energy-accumulating medium, the composition of eutectic mixture is equivalent to by 90wt.% calcium chloride hexahydrate, 7-7.5wt.%
During the composition of the mixture that magnesium chloride hexahydrate and 2.5-3wt.% magnesium nitrate hexahydrate are formed, i.e. can realize it and possess the most altogether
Crystal transition temperature.
Particularly, SrCl in described energy-accumulating medium2·6H2O content be 1-1.5wt.%, CMC content be 3%-4wt%
Time, the performance of energy storage material can be improved further.Described content ratio is for calculating on the basis of eutectic mixture.
The raw material of described energy-accumulating medium is made up of calcium chloride, magnesium chloride, magnesium nitrate, strontium chloride and water, or respective substance
Hydrate and/or water composition.
The following is embodiments of the invention 3-7, it can realize the performance similar with embodiment 1-2.
Table 1. embodiment 3-7 composition table and corresponding performance parameter (g)
Comparative example 1
80 grams of calcium chloride hexahydrate sample heating and melting are added 1-2wt.% six water strontium chloride be installed in hermetic container, press
Condition described by embodiment 1 carries out heating and cooling experiment, and result is as shown in Fig. 3 thick line.Visible medium, when 28.2 DEG C, starts
Undergoing phase transition phase transition temperature is 29 DEG C, repeats shown in temperature lift-down curve Fig. 3 fine rule that said process records with pure water, phase transition temperature
Exceed about 4 DEG C.
Comparative example 2
72 grams of calcium chloride hexahydrates, 4 grams of magnesium chloride hexahydrates, 4 grams of magnesium nitrate hexahydrate Hybrid Heating thawings are obtained 80 grams of mixing
Solution, stirs addition 0.8-1.2g six water strontium chloride and 3-4g CMC in this liquid to be loaded in hermetic container, and keep
A period of time, find still have the solid of about 10% not to be completely melt into liquid.Fill this sample in hermetic container, by embodiment
Condition described by 1 carries out heating and cooling experiment, and result is as indicated in a solid line in fig. 4.Visible medium starts being cooled to about 23.5 DEG C
Being warming up near 25 DEG C, start again slow cooling to ambient temperature, period does not has platform to occur, this is not to be one due to medium
Solidify at individual temperature to Environment release heat, it is impossible to enough maintain own temperature constant；In same temperature-rise period, medium be can be observed
Being to slowly warm up to ambient temperature, this is not to be the heat absorbing environment at one temperature due to medium, it is impossible to enough keep environment
Temperature constant.Repeat above-mentioned lab diagram 3 dotted line with pure water compared with, energy storage effect is much better, forms energy storage effect a little with Fig. 1
The most far short of what is expected.
Claims (5)
1. a phase-change and energy-storage medium, it is characterised in that described phase-change and energy-storage medium includes by water, calcium chloride, magnesium chloride and nitre
The eutectic mixture of acid magnesium composition, described eutectic mixture is contained within six water strontium chloride and carboxymethyl celluloses, wherein six water chlorine
Change strontium is as nucleator, and carboxymethyl cellulose is as thickening agent.
Phase-change and energy-storage medium the most according to claim 1, it is characterised in that the composition of described eutectic mixture be equivalent to by
The group of the mixture that 90wt.% calcium chloride hexahydrate, 7-7.5wt.% magnesium chloride hexahydrate and 2.5-3wt.% magnesium nitrate hexahydrate are formed
Become.
Phase-change and energy-storage medium the most according to claim 1 or claim 2, it is characterised in that SrCl in described energy-accumulating medium2·6H2O contains
Amount is 3%-4% for 1-1.5wt.%, CMC content.
Phase-change and energy-storage medium the most according to claim 1 or claim 2, it is characterised in that the raw material of described energy-accumulating medium is by chlorination
Calcium, magnesium chloride, magnesium nitrate, strontium chloride and water form, or the hydrate of respective substance and/or water form.
Phase-change and energy-storage medium the most according to claim 1 or claim 2, it is characterised in that the eutectic phase alternating temperature of described eutectic mixture
Degree is for 25-26 degree Celsius.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610598749.XA CN106221675A (en) | 2016-07-27 | 2016-07-27 | A kind of phase-change and energy-storage medium |
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| CN201610598749.XA CN106221675A (en) | 2016-07-27 | 2016-07-27 | A kind of phase-change and energy-storage medium |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107556972A (en) * | 2017-08-24 | 2018-01-09 | 中国科学院青海盐湖研究所 | Normal low temperature phase change energy-accumulating medium and preparation method thereof |
| CN108034409A (en) * | 2017-12-06 | 2018-05-15 | 嘉兴菲莫斯节能技术有限公司 | A kind of Inorganic phase change energy storage material |
| 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 |
| CN114230229A (en) * | 2021-12-30 | 2022-03-25 | 河北农业大学 | Calcium chloride hexahydrate composite phase change thermal insulation mortar |
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| CN103785335A (en) * | 2014-02-19 | 2014-05-14 | 中国科学院青海盐湖研究所 | Preparation method for inorganic phase-change microcapsule and inorganic phase-change microcapsule |
| CN104419381A (en) * | 2013-09-06 | 2015-03-18 | 广州市香港科大霍英东研究院 | Phase change material and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1940006A (en) * | 2006-09-12 | 2007-04-04 | 湖南大学 | Heat-storage medium and its use |
| CN104419381A (en) * | 2013-09-06 | 2015-03-18 | 广州市香港科大霍英东研究院 | Phase change material and preparation method thereof |
| CN103785335A (en) * | 2014-02-19 | 2014-05-14 | 中国科学院青海盐湖研究所 | Preparation method for inorganic phase-change microcapsule and inorganic phase-change microcapsule |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107556972A (en) * | 2017-08-24 | 2018-01-09 | 中国科学院青海盐湖研究所 | Normal low temperature phase change energy-accumulating medium and preparation method thereof |
| CN107556972B (en) * | 2017-08-24 | 2021-03-02 | 中国科学院青海盐湖研究所 | Normal-low temperature phase change energy storage medium and preparation method thereof |
| CN108034409A (en) * | 2017-12-06 | 2018-05-15 | 嘉兴菲莫斯节能技术有限公司 | A kind of Inorganic phase change energy storage material |
| 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 |
| CN114230229A (en) * | 2021-12-30 | 2022-03-25 | 河北农业大学 | Calcium chloride hexahydrate composite phase change thermal insulation mortar |
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