CN114181672A - Low-temperature phase change cold storage material - Google Patents
Low-temperature phase change cold storage material Download PDFInfo
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- CN114181672A CN114181672A CN202210016878.9A CN202210016878A CN114181672A CN 114181672 A CN114181672 A CN 114181672A CN 202210016878 A CN202210016878 A CN 202210016878A CN 114181672 A CN114181672 A CN 114181672A
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- 230000008859 change Effects 0.000 title claims abstract description 26
- 239000011232 storage material Substances 0.000 title claims abstract description 22
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 20
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims abstract description 12
- 239000012153 distilled water Substances 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- ZUDYPQRUOYEARG-UHFFFAOYSA-L barium(2+);dihydroxide;octahydrate Chemical compound O.O.O.O.O.O.O.O.[OH-].[OH-].[Ba+2] ZUDYPQRUOYEARG-UHFFFAOYSA-L 0.000 claims abstract description 9
- 235000011187 glycerol Nutrition 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 238000002360 preparation method Methods 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 238000004806 packaging method and process Methods 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims abstract description 4
- 239000003755 preservative agent Substances 0.000 claims abstract description 4
- 230000002335 preservative effect Effects 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 239000007787 solid Substances 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims abstract description 4
- 238000005303 weighing Methods 0.000 claims abstract description 4
- 239000012782 phase change material Substances 0.000 abstract description 22
- 239000002131 composite material Substances 0.000 abstract description 11
- 238000004781 supercooling Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 2
- 230000002441 reversible effect Effects 0.000 abstract description 2
- 239000012071 phase Substances 0.000 description 22
- 238000004146 energy storage Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- 238000012360 testing method Methods 0.000 description 7
- 238000005191 phase separation Methods 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- QHFQAJHNDKBRBO-UHFFFAOYSA-L calcium chloride hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].[Cl-].[Ca+2] QHFQAJHNDKBRBO-UHFFFAOYSA-L 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000001938 differential scanning calorimetry curve Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910010272 inorganic material Inorganic materials 0.000 description 3
- 239000011147 inorganic material Substances 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- WWZKQHOCKIZLMA-UHFFFAOYSA-N octanoic acid Chemical compound CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 description 2
- 239000012074 organic phase Substances 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- 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 description 1
- 239000005635 Caprylic acid (CAS 124-07-2) Substances 0.000 description 1
- 239000005639 Lauric acid Substances 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- YKBPPCMNICNBEU-UHFFFAOYSA-M cesium;chloride;hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].[Cs+] YKBPPCMNICNBEU-UHFFFAOYSA-M 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 239000002667 nucleating agent Substances 0.000 description 1
- 229960002446 octanoic acid Drugs 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- 229940087562 sodium acetate trihydrate Drugs 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- RSIJVJUOQBWMIM-UHFFFAOYSA-L sodium sulfate decahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.[Na+].[Na+].[O-]S([O-])(=O)=O RSIJVJUOQBWMIM-UHFFFAOYSA-L 0.000 description 1
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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
- C09K5/066—Cooling mixtures; De-icing compositions
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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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)
Abstract
The invention discloses a low-temperature phase change cold storage material, and relates to an organic-inorganic composite phase change material, which comprises 42.65% of anhydrous calcium chloride, 41.5% of distilled water, 14.85% of glycerol and 1% of barium hydroxide octahydrate in percentage by mass. The phase-change temperature of the composite phase-change material provided by the invention is 11.8 ℃, the supercooling degree is 1.2 ℃, the phase-change enthalpy value is 112.86J/g, the phase-change process is reversible, and the composite phase-change material can be repeatedly applied. The preparation method comprises the steps of firstly weighing anhydrous calcium chloride and distilled water with corresponding mass, shaking the anhydrous calcium chloride and the distilled water by using an ultrasonic oscillator until no obvious solid particles exist in liquid to obtain an intermediate, sealing the intermediate by using a preservative film, standing the intermediate to room temperature, adding the weighed glycerin and the barium hydroxide octahydrate with corresponding mass into the intermediate, finally stirring the mixture by using a constant-temperature magnetic stirrer for 10 minutes, and then packaging the mixture.
Description
Technical Field
The invention relates to the field of new energy storage, in particular to a low-temperature phase change cold storage material.
Background
The energy consumption in the 21 st century is serious, China highly pays attention to the development of renewable energy sources in order to solve the energy pressure, and the phase change material energy storage technology in the renewable energy sources has a good development prospect. The daily required power consumption of the air conditioner of people occupies more than 50% of the daily power consumption, so that the phase change energy storage method is necessary to reduce the energy consumption of the air conditioner. The technology utilizes the phase-change material to store cold by utilizing the valley point of the electric power and release the cold at the peak point, thereby solving the problem of non-corresponding supply and demand relation, reducing the use of the electric power and saving partial energy.
The phase-change materials are classified according to phase-change temperature, and can be generally classified into high-temperature (more than 250 ℃), medium-temperature (100-250 ℃) and low-temperature (less than 100 ℃) phase-change materials, the low-temperature phase-change materials are generally used in air conditioner cold storage, and the phase-change materials with proper phase-change temperature and stable performance can be applied to air conditioner cold storage and save energy. Phase change materials commonly used in the field of low-temperature energy storage are generally classified into two categories, organic phase change materials and inorganic phase change materials. The organic phase-change energy storage material is commonly used paraffin, caprylic acid, lauric acid, lauryl alcohol and the like, most of organic phase-change materials generally have the defects of supercooling, phase separation and the like, but the defects of low heat conductivity coefficient, high price, low phase-change latent heat value and the like of the organic phase-change materials limit the application range of the organic phase-change materials. The inorganic phase-change energy storage material is generally barium hydroxide octahydrate, calcium chloride hexahydrate, sodium acetate trihydrate, sodium sulfate decahydrate, sodium chloride solution and the like, and has the defects of large heat conductivity coefficient, good economic performance and large latent heat value, but the inorganic phase-change material has large supercooling degree, serious phase separation, easy corrosion and leakage and the like, so that the application range of the inorganic material is limited. At present, partial researchers research inorganic phase change materials and organic phase change materials in a coupling mode to develop a composite phase change energy storage material, and the composite phase change energy storage material has the advantages of organic materials and inorganic materials, is large in latent heat value, free of obvious phase separation and supercooling phenomena, and good in service performance
The Yangting of Huanan Ridgeworker university uses calcium chloride hexahydrate as a base material, urea is a temperature regulator, cesium chloride hexahydrate is a nucleating agent, MC is a thickening agent, a novel calcium chloride hexahydrate-based composite phase change energy storage material is synthesized, the phase change temperature of the novel composite phase change material is 11.62 ℃, the phase change latent heat value is 127.2J/g, the novel composite phase change material can be applied to cold storage of an air conditioner, the material is complex in proportion, an obvious phase layering phenomenon exists, the thickening agent needs to be added, and the stability of the novel composite phase change material still remains to be examined.
Disclosure of Invention
The invention aims to provide a low-temperature phase change cold storage material which has the advantages of wide source, good performance, low price, no toxicity or danger, no obvious phase separation phenomenon by using an organic-inorganic material compounding method and convenience in use.
In order to achieve the purpose, the invention adopts the following technical scheme:
the cold storage material applied to the low-temperature phase change comprises the following components in parts by weight: 42.65% of anhydrous calcium chloride, 41.5% of distilled water, 14.85% of glycerol and 1% of barium hydroxide octahydrate.
The invention also discloses a method for preparing the low-temperature phase change cold storage material, which comprises the following steps:
the preparation method comprises the steps of firstly weighing anhydrous calcium chloride and distilled water with corresponding mass, shaking the anhydrous calcium chloride and the distilled water by using an ultrasonic oscillator until no obvious solid particles exist in liquid to obtain an intermediate, sealing the intermediate by using a preservative film, standing the intermediate to room temperature, adding the weighed glycerin and the barium hydroxide octahydrate with corresponding mass into the intermediate, finally stirring the mixture by using a constant-temperature magnetic stirrer for 10 minutes, and then packaging the mixture.
The invention has the advantages that: the phase-change temperature of the material can meet the requirements of the field of cold storage air conditioners, the phase-change temperature is 11.8 ℃, the supercooling degree is 1.2 ℃, the phase-change enthalpy value is 112.86J/g, the phase-change process is reversible, and the material can be repeatedly applied.
Description of the drawings:
FIG. 1 is a DSC curve of a low temperature phase change cold storage material of the present invention;
FIG. 2 is a step-cooling curve of a low-temperature phase-change cold-storage material according to the present invention;
fig. 3 shows a low-temperature phase change cold storage material and a preparation method thereof according to the present invention.
The specific implementation mode is as follows:
the technical solution of the present invention will be further described in detail with reference to the accompanying drawings and examples.
The present invention will be better understood and appreciated more fully when considered in conjunction with the accompanying drawings. The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure.
The invention provides a low-temperature phase change cold storage material which comprises, by mass, 42.65% of anhydrous calcium chloride, 41.5% of distilled water, 14.85% of glycerol and 1% of barium hydroxide octahydrate. The preparation steps of the low-temperature phase change cold storage material are shown in fig. 3, and the method comprises the following steps: the preparation method comprises the steps of firstly weighing anhydrous calcium chloride and distilled water with corresponding mass, shaking the anhydrous calcium chloride and the distilled water by using an ultrasonic oscillator until no obvious solid particles exist in liquid to obtain an intermediate, sealing the intermediate by using a preservative film, standing the intermediate to room temperature, adding the weighed glycerin and the barium hydroxide octahydrate with corresponding mass into the intermediate, finally stirring the mixture by using a constant-temperature magnetic stirrer for 10 minutes, and then packaging the mixture.
The prepared material was subjected to a thermophysical property test to obtain the results shown in fig. 1 and 2.
Fig. 1 is a DSC curve of a low-temperature phase change cold storage material of the present invention: the test is to test the phase change enthalpy value of the composite phase change material, and uses a differential calorimeter with the model of DSC-300C, which is produced by Shanghai Duoqin instruments Co., Ltd, and the performance indexes are as follows:
1. the temperature range is-40 to 600 ℃,
2. the temperature resolution is 0.01 ℃,
3. the temperature fluctuates +/-0.01 ℃,
4. the heating rate is 0.1-100 ℃/min,
5, DSC measuring range is 0 to +/-600 mW,
DSC resolution of 0.01uW,
DSC degree of 0.001mW,
during the test, 10mg of sample is weighed, loaded by using an aluminum crucible and placed into DSC-300C, and the test conditions are as follows:
protective gas and flow: air, 60 ml/min;
during the experiment, the sample is firstly reduced to-35 ℃ at the speed of 5 ℃/min, kept at-35 ℃ for 10min and then heated to 70 ℃ at the speed of 5 ℃/min. Finally, the DSC curve of the sample obtained by the mapping software is shown in figure 1.
The phase change temperature of the low-temperature phase change cold storage material is 11.8 ℃, and the phase change enthalpy is 112.86J/g.
Fig. 2 is a step-cooling curve of a low-temperature phase-change cold storage material of the invention: the test is to test the supercooling degree of the composite phase change material, a data acquisition instrument with the model number of 34970A manufactured by Agilent technologies of America is used, and the performance indexes are as follows:
1. and (3) measuring precision: 0.01 deg.C
During the experiment, 20g of sample is placed in a beaker, a T-shaped thermocouple is inserted into the phase change material and sealed, the thermocouple is basically located in the center of the material and is prevented from touching the cup wall, then the material is placed in a constant temperature incubator at 40 ℃, the temperature of the incubator is set to-15 ℃ after the temperature of the sample is constant, the sample is cooled, and an Agilent data acquisition instrument is started to collect data until the temperature of the sample is constant. Finally, the step-cooling curve of the sample obtained by the mapping software is shown in fig. 2.
The supercooling degree of the low-temperature phase change cold storage material is 1.2 ℃ as can be obtained from the figure.
The above embodiments are merely illustrative of the technical concepts and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (1)
1. A low-temperature phase change cold storage material comprises 42.65% of anhydrous calcium chloride, 41.5% of distilled water, 14.85% of glycerol and 1% of barium hydroxide octahydrate by mass ratio; the preparation method comprises the steps of firstly weighing anhydrous calcium chloride and distilled water with corresponding mass, shaking the anhydrous calcium chloride and the distilled water by using an ultrasonic oscillator until no obvious solid particles exist in liquid to obtain an intermediate, sealing the intermediate by using a preservative film, standing the intermediate to room temperature, adding the weighed glycerin and the barium hydroxide octahydrate with corresponding mass into the intermediate, finally stirring the mixture by using a constant-temperature magnetic stirrer for 10 minutes, and then packaging the mixture.
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