CN105694821A - Phase-change energy storage medium - Google Patents
Phase-change energy storage medium Download PDFInfo
- Publication number
- CN105694821A CN105694821A CN201610155966.1A CN201610155966A CN105694821A CN 105694821 A CN105694821 A CN 105694821A CN 201610155966 A CN201610155966 A CN 201610155966A CN 105694821 A CN105694821 A CN 105694821A
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- CN
- China
- Prior art keywords
- phase
- temperature
- energy
- storage medium
- change
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000004146 energy storage Methods 0.000 title claims abstract description 31
- NROKBHXJSPEDAR-UHFFFAOYSA-M potassium fluoride Chemical compound [F-].[K+] NROKBHXJSPEDAR-UHFFFAOYSA-M 0.000 claims abstract description 36
- 239000000203 mixture Substances 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000011698 potassium fluoride Substances 0.000 claims abstract description 18
- 235000003270 potassium fluoride Nutrition 0.000 claims abstract description 18
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims abstract description 13
- 239000001768 carboxy methyl cellulose Substances 0.000 claims abstract description 13
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims abstract description 13
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims abstract description 13
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims abstract description 10
- 239000000374 eutectic mixture Substances 0.000 claims abstract description 7
- 235000017281 sodium acetate Nutrition 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 11
- 150000004683 dihydrates Chemical class 0.000 claims description 8
- 239000001632 sodium acetate Substances 0.000 claims description 8
- BDKLKNJTMLIAFE-UHFFFAOYSA-N 2-(3-fluorophenyl)-1,3-oxazole-4-carbaldehyde Chemical compound FC1=CC=CC(C=2OC=C(C=O)N=2)=C1 BDKLKNJTMLIAFE-UHFFFAOYSA-N 0.000 claims description 5
- 229940087562 sodium acetate trihydrate Drugs 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 4
- 230000005496 eutectics Effects 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 239000007791 liquid phase Substances 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 abstract 1
- 239000012071 phase Substances 0.000 description 21
- 230000007704 transition Effects 0.000 description 16
- 239000011232 storage material Substances 0.000 description 12
- 239000007788 liquid Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 238000005338 heat storage Methods 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- AYRVGWHSXIMRAB-UHFFFAOYSA-M sodium acetate trihydrate Chemical class O.O.O.[Na+].CC([O-])=O AYRVGWHSXIMRAB-UHFFFAOYSA-M 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000004781 supercooling Methods 0.000 description 2
- 238000010257 thawing Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000010534 mechanism of action Effects 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
The invention discloses a phase-change energy storage medium which is a mixture composed of water, natrium aceticum, potassium fluoride and carboxymethylcellulose. Water, natrium aceticum and potassium fluoride have composites for forming a eutectic mixture. A preparation method includes the step of mixing, heating and completely melting all the components in proportion to be evenly stirred, wherein the liquid phase can be used as the phase-change energy storage medium. The medium has the phase-change temperature of about 51 DEG C, and has the advantages of being environmentally friendly, low in cost and the like.
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, normally low temperature phase-change heat-storage material is phase transition temperature Tm material within the scope of-50-90 DEG C, and the application in building and daily life of this type of material is relatively broad。The phase transition temperature material lower than 15 DEG C is mainly used in air conditioner refrigerating, and phase transition temperature material between 15-90 DEG C is then widely used in solar energy heat-storage and heat load field。
The mechanism of action of normal low-temperature phase-change energy-storing material is: when temperature is slightly above phase transition temperature, phase-change and energy-storage medium absorbs amount of heat from environment and melts, energy storage is got up, when temperature is lower than phase transition temperature, the phase-change and energy-storage medium at room temperature melted is condensed into solid, and discharge substantial amounts of heat to indoor environment, thus maintaining the relative constancy of room temperature。In the area that temperature difference per day or week (per week) temperature difference are very big, phase-change and energy-storage medium at room temperature has important using value, and it can store energy in the high temperature period, and in night or colder period to indoor heating, thus reaching energy-conservation purpose。
Desirable phase-changing energy storage material generally should have the fusing point of relative constancy, is so only possible to when ambient temperature is higher or lower than phase transition temperature, and energy storage material absorbs or to Environment release energy from environment as much as possible。This feature absorbs energy from low-grade solar energy for energy storage material 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 the Organic substance currently used as room temperature phase-change energy-storage material has dangerous inflammable, expensive, the shortcomings such as heat conductivity is bad；Anhydrous fused salt 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, and the many-side such as the peak load shifting of electrical network has a wide range of applications。Still suffer from the necessity needing exploitation to be specifically designed for room temperature energy storage material at present。
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 possesses the feature that phase transition temperature is more moderate and with low cost。
Phase-change and energy-storage medium provided by the invention is the mixture being made up of water, sodium acetate, potassium fluoride and carboxymethyl cellulose, and water, sodium acetate and potassium fluoride have the composition forming eutectic mixture。
Preferably, the composition of described energy-accumulating medium is equivalent to the composition of the mixture formed by 95-97wt.% Sodium acetate trihydrate, 3-5wt.% dihydrate of potassium fluoride and 2-4% carboxymethyl cellulose。
It is furthermore preferred that the composition of described energy-accumulating medium is equivalent to by 95wt.% Sodium acetate trihydrate, the composition of 5wt.% dihydrate of potassium fluoride and the formed mixture of 4% carboxymethyl cellulose。The raw material herein preparing energy-accumulating medium can be that sodium acetate, potassium fluoride and water add carboxymethyl cellulose；Can also be the sodium acetate containing water of crystallization, potassium fluoride containing water of crystallization add carboxymethyl cellulose；Can also be constituent part being the compound containing water of crystallization, remainder be corresponding water-free compound；As long as the composition of its raw material is equivalent to by 95wt.% Sodium acetate trihydrate, 5wt.% dihydrate of potassium fluoride adds 4% the formed mixture of carboxymethyl cellulose, and it just can form the eutectic mixture of the present invention。
Preferably, the raw material of described energy-accumulating medium is made up of sodium acetate, potassium fluoride, water and carboxymethyl cellulose, or is made up of corresponding material part or whole hydrates and/or water。
Preferably, the eutectic phase temperature of described eutectic mixture is 50-51 degrees centigrade。
There is a composition point in the Sodium acetate trihydrate+dihydrate of potassium fluoride+carboxymethyl cellulose system of above-mentioned material composition, the phase transition temperature of this point is about 51 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, be used 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 is consistent with liquid phase composition, phase transformation varies with temperature the plurality of advantages such as sensitive。When ambient temperature is higher than 51 DEG C, this energy storage material absorbs heat in large quantities by the thawing of self from environment, and when ambient temperature is lower than 51 DEG C, energy storage material is slowly crystallized into solid phase by liquid phase, to the substantial amounts of heat of Environment release, thus maintaining stablizing of ambient temperature。
Accompanying drawing explanation
Fig. 1, embodiment 1 energy storage material inhale exothermic temperature curve chart。
Exothermic temperature curve chart inhaled by Fig. 2, energy storage material 1。
Exothermic temperature curve chart inhaled by Fig. 3, energy storage material 2。
Exothermic temperature curve chart inhaled by Fig. 4, energy storage material 3。
Detailed description of the invention
The following is embodiments of the invention, it is used only as explanation of the invention and and unrestricted。
Embodiment 1:
76 grams of Sodium acetate trihydrates and the 4 grams of dihydrate of potassium fluoride Hybrid Heating thawings that can form eutectic mixture obtain 80 grams of mixed solutions and add 4g carboxymethyl cellulose mix homogeneously, this liquid is loaded in hermetic container, this container is placed in the air ambient of 30 DEG C, record medium temperature to change as shown in Fig. 1 thick line, visible, system is down near 49.5 DEG C in temperature, start to undergo phase transition, at about 51 DEG C, an obvious temperature platform occurs, this is to solidify at this temperature due to medium to the substantial amounts of heat of Environment release, thus maintaining stablizing of own temperature。Then the container equipped with energy-accumulating medium being placed in the environment of 70 DEG C and heat up, medium be can be observed and there is an intensification platform when 51 DEG C, this is that medium a large amount of heats that absorb from environment melt, thus maintaining the constant of ambient temperature。After 51 DEG C, medium melts completely, heats up rapidly。
Repeat said process with the pure water of same weight, record its temperature lift-down curve such as shown in Fig. 1 fine rule, it is seen that namely water reach ambient temperature within very short time, and constant temperature is limited in one's ability。
Relatively both are visible, and the energy-accumulating medium of the present invention can from the environment substantial amounts of heat of absorption higher than 51 DEG C, and to the heat lower than 51 DEG C of Environment release, thus maintaining the constant of medium itself and ambient temperature, its temperature adjusting ability is more many times greater than pure water。
Comparative example 1
80 grams of acetate trihydrate sodium samples are heated to 60-70 DEG C, it has been found that sample becomes liquid。Filling this liquid in hermetic container, carry out heating and cooling experiment by the condition described by embodiment 1, result is such as shown in Fig. 2 thick line。Visible medium is when 45.5 DEG C, and starting to undergo phase transition phase transition temperature is 56 DEG C, repeats shown in temperature lift-down curve Fig. 2 fine rule that said process records with pure water, and compared to Figure 1 degree of supercooling increases, and phase transition temperature exceeds about 5 DEG C。
Comparative example 2
80 grams of dihydrate of potassium fluoride samples are heated to 60-70 DEG C, it has been found that sample becomes liquid。Fill this liquid in hermetic container, this container is placed in the air ambient of 20 DEG C, record medium temperature to change as shown in Fig. 1 thick line, visible, system is down near 27 DEG C in temperature, starts to undergo phase transition, and an obvious temperature platform occurs at about 41 DEG C, this is to solidify at this temperature due to medium to the substantial amounts of heat of Environment release, thus maintaining stablizing of own temperature。Then the container equipped with energy-accumulating medium being placed in the environment of 60-70 DEG C to heat up, medium be can be observed and there is an intensification platform near 41 DEG C, this is that medium a large amount of heats that absorb from environment melt, thus maintaining the constant of ambient temperature。After 41 DEG C, medium melts completely, heats up rapidly。
Repeat shown in temperature lift-down curve Fig. 2 fine rule of recording of said process with pure water, compared to Figure 1 phase transition temperature low go out about 10 DEG C, degree of supercooling increases,。
Comparative example 3
76 grams of Sodium acetate trihydrates and 4g dihydrate of potassium fluoride being mixed, this sample is heated to about 60-70 DEG C, and keeps a period of time, fill this sample in hermetic container, carry out heating and cooling experiment by the condition described by embodiment 1, result is as shown in figure 3 by the solid lines。Visible medium be cooled to about 47.4 DEG C start to warm up to 53.6 DEG C near occur a shorter temperature platform, start to be slow cooling to ambient temperature, this is to be separated owing to medium there occurs in temperature-fall period, can not well solidify at one temperature to Environment release heat, it is impossible to enough well maintenance own temperature are constant；In same temperature-rise period, can be observed medium slowly heat up 52 DEG C time undergo phase transition one intensification platform temperature of appearance, this is that medium a large amount of heats that absorb from environment melt, and temperature-rise period can maintain the change of ambient temperature。Repeat above-mentioned lab diagram 4 dotted line with pure water compared with, energy storage effect to be got well, with Fig. 1 form energy storage weak effect a little some。
Claims (4)
1. a phase-change and energy-storage medium, it is characterised in that described phase-change and energy-storage medium is the mixture being made up of water, sodium acetate, potassium fluoride and carboxymethyl cellulose, and water, sodium acetate and potassium fluoride have formed eutectic mixture composition。
2. phase-change and energy-storage medium according to claim 1, it is characterised in that the composition of described energy-accumulating medium is equivalent to the composition of the mixture formed by 95-97wt.% Sodium acetate trihydrate, 3-5wt.% dihydrate of potassium fluoride and 2-4% carboxymethyl cellulose。
3. phase-change and energy-storage medium according to claim 1 or claim 2, it is characterised in that the raw material of described energy-accumulating medium is made up of sodium acetate, potassium fluoride and carboxymethyl cellulose, or the hydrate of corresponding material and/or water composition。
4. phase-change and energy-storage medium according to claim 1 or claim 2, it is characterised in that the eutectic phase temperature of described eutectic mixture is 51 degrees Celsius。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610155966.1A CN105694821B (en) | 2016-03-18 | 2016-03-18 | A kind of phase-change and energy-storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610155966.1A CN105694821B (en) | 2016-03-18 | 2016-03-18 | A kind of phase-change and energy-storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105694821A true CN105694821A (en) | 2016-06-22 |
| CN105694821B CN105694821B (en) | 2019-09-24 |
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| CN201610155966.1A Expired - Fee Related CN105694821B (en) | 2016-03-18 | 2016-03-18 | A kind of phase-change and energy-storage medium |
Country Status (1)
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| CN (1) | CN105694821B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106753259A (en) * | 2016-11-25 | 2017-05-31 | 贺迈新能源科技（上海）有限公司 | The heat accumulating and preparation method of a kind of low transformation temperature |
| CN111704541A (en) * | 2020-06-10 | 2020-09-25 | 福建南平龙晟香精香料有限公司 | Method for treating wastewater generated in ambrotone preparation process |
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2016
- 2016-03-18 CN CN201610155966.1A patent/CN105694821B/en not_active Expired - Fee Related
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|---|---|---|---|---|
| CN106753259A (en) * | 2016-11-25 | 2017-05-31 | 贺迈新能源科技（上海）有限公司 | The heat accumulating and preparation method of a kind of low transformation temperature |
| CN111704541A (en) * | 2020-06-10 | 2020-09-25 | 福建南平龙晟香精香料有限公司 | Method for treating wastewater generated in ambrotone preparation process |
| CN111704541B (en) * | 2020-06-10 | 2022-12-20 | 福建南平龙晟香精香料有限公司 | Method for treating wastewater generated in ambrotone preparation process |
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| CN105694821B (en) | 2019-09-24 |
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