CN102277137A - Calcium-chloride-based room-temperature phase-change energy storage medium - Google Patents
Calcium-chloride-based room-temperature phase-change energy storage medium Download PDFInfo
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- CN102277137A CN102277137A CN201110148510XA CN201110148510A CN102277137A CN 102277137 A CN102277137 A CN 102277137A CN 201110148510X A CN201110148510X A CN 201110148510XA CN 201110148510 A CN201110148510 A CN 201110148510A CN 102277137 A CN102277137 A CN 102277137A
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Abstract
The invention relates to a calcium-chloride-based room-temperature phase-change energy storage medium. The medium comprises 41-52% of calcium chloride, 41-51% of water and 1-12% of ammonium chloride by mass. The energy storage medium has the characteristics that the phase change temperature is close to the room temperature; the materials are environment-friendly; the cost is low and the like.
Description
Technical field
The present invention relates to a kind of phase change material, relate in particular to a kind of phase-change and energy-storage medium at room temperature of calcium chloride base with phase deformation type heat energy storage.
Background technology
Phase-change and energy-storage medium at room temperature is near a kind of undergoing phase transition room temperature and storing or the material of release of heat, the mechanism of action is: when temperature during a little more than room temperature (15 ℃～25 ℃), phase-change and energy-storage medium at room temperature absorbs a large amount of heats and melts from environment, energy storage is got up, when temperature is lower than the said temperature zone, the phase-change and energy-storage medium at room temperature that has melted is condensed into solid and discharges a large amount of heats to indoor environment, thereby keeps the constant relatively of room temperature.In temperature difference per day or the very big area of week (per week) temperature difference, phase-change and energy-storage medium at room temperature has important use and is worth, and it can be in high temperature period storage power, and gives indoor heating at night or colder period, thereby reaches purpose of energy saving.
The ideal phase-changing energy storage material generally should have relative constant fusing point, and energy storage material absorbs or releases energy to environment from environment as much as possible in the time of so just may working as envrionment temperature and be higher or lower than transformation temperature.This feature absorbs energy and keeps the constant significant of room temperature for energy storage material from low-grade sun power.
Material as phase-change and energy-storage medium can be anhydrous salt, salt water chemical compound and composition thereof, organism etc.Wherein the organism as the room temperature phase-change energy-storage material has shortcomings such as dangerous inflammable, that price is more expensive, thermal conductivity is bad; Anhydrous fused salt is applicable to high-temperature heat-storage; Salt water chemical compound and composition thereof is suitable for storing low-temperature heat source, and these materials are 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.
At present, we have invented a series of inorganic room temperature phase-change energy-storage materials, and as ZL200710034840.X, ZL200810030679.3, ZL200810044751.8 etc., but these materials contain certain lithium nitrate, and cost is higher.
Summary of the invention
Technical problem to be solved by this invention provides the phase-change and energy-storage medium at room temperature of a kind of transformation temperature calcium chloride base more moderate, with low cost.
For addressing the above problem, the phase-change and energy-storage medium at room temperature of a kind of calcium chloride base of the present invention is characterized in that: this medium is that 41～52% calcium chloride, 41～51% water and 1～12% ammonium chloride are formed by weight percent.
The preparation method of the phase-change and energy-storage medium at room temperature of aforesaid a kind of calcium chloride base, both can mix post-heating by solid calcium chloride hexahydrate and ammonium chloride obtains to melting fully, can mix post-heating by solid Calcium dichloride dihydrate, water and ammonium chloride again and obtain, also can form by calcium chloride water and the allotment of chloride solid mixed dissolution to melting fully.
The present invention compared with prior art has the following advantages:
1, the mechanism of action of energy-accumulating medium of the present invention is, exists one to form point in calcium chloride-ammonium chloride-aqueous systems, and the transformation temperature of this point is 25～26 ℃.This energy-accumulating medium is packaged in the encloses container of being made by various materials, places the indoor or body of wall of buildings, can be used for regulating room temp, make it remain on a more comfortable temperature range.
2, energy-accumulating medium of the present invention has that phase transformation temperature points is stable, solid phase is formed, phase transformation consistent with the liquid phase composition and varied with temperature plurality of advantages such as sensitivity during phase transformation.When envrionment temperature is higher than 26 ℃, as 27 ℃ the time, this energy storage material absorbs heat in large quantities by the thawing of self from environment, when envrionment temperature is lower than 24 ℃, energy storage material slowly crystallizes into solid phase by liquid phase, discharges a large amount of heats to environment, thereby keeps the stable of envrionment temperature.
3, because material therefor of the present invention is cheap and easy to get, and environmental protection, therefore, reduced production cost effectively.
Description of drawings
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
Fig. 1 is energy storage material prescription protection domain synoptic diagram of the present invention.
Fig. 2 is that energy storage material of the present invention (a point among Fig. 1) is inhaled the exothermic temperature graphic representation.
Fig. 3 is that contrast material (b point among Fig. 1) is inhaled the exothermic temperature graphic representation.
Fig. 4 is that contrast material (c point among Fig. 1) is inhaled the exothermic temperature graphic representation.
Embodiment
Embodiment 1 is after ammonium chlorides mix 95.3 gram calcium chloride hexahydrates and 4.7 grams, be heated to melt fully and obtain 100 gram mixing solutionss, this solution is 48.3% calcium chloride by weight percent, 47.0% water and 4.7% ammonium chloride are formed, shown in the point of a among Fig. 1, this liquid is loaded in the encloses container, this container placed 20 ℃ air ambient, recording medium temperature changes shown in Fig. 2 thick line, as seen, a tangible temperature platform appears about 25 ℃, this is to discharge a large amount of heats because medium solidifies under this temperature to environment, thereby keeps the stable of self temperature.Then the container that energy-accumulating medium is housed is placed in 30 ℃ the environment and heats up, can be observed medium and have an intensification platform in the time of 26 ℃, this is that medium a large amount of heats that absorb from environment melt, thereby keeps the constant of envrionment temperature.Be higher than after 27 ℃, medium melts fully, heats up rapidly.
Pure water with same weight repeats said process, record its temperature lift-down curve shown in Fig. 2 fine rule, but water breakthrough promptly reaches envrionment temperature in very short time, and constant temperature is limited in one's ability.
Relatively both as seen, energy-accumulating medium of the present invention can absorb a large amount of heats from the environment that is higher than 26 ℃, and to being lower than 24 ℃ of environment release of heat, thereby keeps the constant of medium itself and envrionment temperature, its temperature adjusting ability is bigger much than pure water.When envrionment temperature changed between 20～30 ℃, the heat energy power of storing of energy storage material was about 10 times of water.
The phase-change and energy-storage medium at room temperature of 2 one kinds of calcium chloride bases of embodiment, this medium are that 41.0% calcium chloride, 51.0% water and 8.0% ammonium chloride are formed by weight percent.
This energy-accumulating medium is mixed and heated to fully by 80.9 gram calcium chloride hexahydrates, 8 gram ammonium chlorides and 11.1 gram water and obtains after the thawing.
The phase-change and energy-storage medium at room temperature of 3 one kinds of calcium chloride bases of embodiment, this medium are that 52.0% calcium chloride, 41.0% water and 7.0% ammonium chloride are formed by weight percent.
This energy-accumulating medium is mixed and heated to fully by 68.9 gram Calcium dichloride dihydrates, 7 gram ammonium chlorides and 24.1 water and obtains after the thawing.
The phase-change and energy-storage medium at room temperature of 4 one kinds of calcium chloride bases of embodiment, this medium are that 50% calcium chloride, 49.0% water and 1.0% ammonium chloride are formed by weight percent.
This energy-accumulating medium is mixed and heated to fully by 66.2 gram Calcium dichloride dihydrates, 1 gram ammonium chloride and 32.8 water and obtains after the thawing.
The phase-change and energy-storage medium at room temperature of 5 one kinds of calcium chloride bases of embodiment, this medium are that 44.5% calcium chloride, 43.5% water and 12% ammonium chloride are formed by weight percent.
This energy-accumulating medium is mixed and heated to fully by 58.9 gram Calcium dichloride dihydrates, 12 gram ammonium chlorides and 29.1 gram water and obtains after the thawing.
Comparative Examples 1 mixes 84.4 gram calcium chloride hexahydrates, 4.0 gram ammonium chlorides and 11.6 gram water, form the solution of component shown in b point among Fig. 1 after the heating for dissolving, wherein the weight percentage of each component is: 42.8% calcium chloride, 53.2% water and 4.0% ammonium chloride.Adorn this liquid in encloses container, carry out the heating and cooling experiment by embodiment 1 described condition, the result is shown in Fig. 3 thick line, visible medium reaches envrionment temperature rapidly in very short time, similar with the temperature lift-down curve (shown in Fig. 3 fine rule) that pure water repetition said process records, the constant temperature ability, with water seemingly.
Comparative Examples 2 mixes 72.3 gram Calcium dichloride dihydrates, 22.5 gram water and 5.2 gram ammonium chlorides, the weight percentage of this mixture each component is: 54.6% calcium chloride, 40.2% water and 5.2% ammonium chloride, shown in the point of the c among Fig. 1, be heated to 30～40 ℃ and keep for some time, find that energy storage material does not almost completely melt.Adorn this sample in encloses container, carry out the heating and cooling experiment by embodiment 1 described condition, the result is shown in Fig. 4 solid line, as seen, because solid does not have fusing in whole intensification and cooling period always, thereby minimum to constant room temperature contribution, survey and inhale exotherm shown in thick line among Fig. 4, medium reaches envrionment temperature rapidly in very short time, repeat to be more or less the same the constant temperature ability shown in temperature lift-down curve Fig. 4 fine rule that said process records with pure water.
By Comparative Examples 1～2 as can be seen, energy-accumulating medium of the present invention has good constant temperature ability.
Should be appreciated that embodiment discussed here and embodiment can propose various improvement and variation just in order to illustrate to the people who is familiar with this field, these improvement and variation will be included in the application's spirit and scope and the appended claim scope.
Claims (1)
1. the phase-change and energy-storage medium at room temperature of a calcium chloride base is characterized in that: this medium is that 41～52% calcium chloride, 41～51% water and 1～12% ammonium chloride are formed by weight percent.
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Cited By (3)
| 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 |
| CN111819265A (en) * | 2018-03-06 | 2020-10-23 | 株式会社钟化 | Cold storage material composition and use thereof |
| CN115298283A (en) * | 2020-03-16 | 2022-11-04 | 矢崎总业株式会社 | Heat storage material composition |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010092393A1 (en) * | 2009-02-11 | 2010-08-19 | Artica Technologies Limited | Phase change material composition |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010092393A1 (en) * | 2009-02-11 | 2010-08-19 | Artica Technologies Limited | Phase change material composition |
Cited By (6)
| 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 |
| CN111819265A (en) * | 2018-03-06 | 2020-10-23 | 株式会社钟化 | Cold storage material composition and use thereof |
| CN111819265B (en) * | 2018-03-06 | 2021-10-26 | 株式会社钟化 | Cold storage material composition and use thereof |
| US11326084B2 (en) | 2018-03-06 | 2022-05-10 | Kaneka Corporation | Cold storage material composition and use thereof |
| CN115298283A (en) * | 2020-03-16 | 2022-11-04 | 矢崎总业株式会社 | Heat storage material composition |
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