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Packaging shape-stabilizing method of inorganic hydrated salt phase-change heat storage material

A technology of phase-change heat storage materials and inorganic hydrated salts, which is applied in the field of material science and can solve problems such as incomplete adsorption, long time consumption, and unevenness

Inactive Publication Date: 2015-02-25
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above methods have solved the leakage problem of phase change materials, the preparation process takes a long time, and there are problems of incomplete and uneven adsorption.

Method used

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  • Packaging shape-stabilizing method of inorganic hydrated salt phase-change heat storage material
  • Packaging shape-stabilizing method of inorganic hydrated salt phase-change heat storage material
  • Packaging shape-stabilizing method of inorganic hydrated salt phase-change heat storage material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) Take 2g CaCl 2 ·6H 2 O, put it in a beaker, add 0.06 borax, mix evenly, add a small amount of deionized water, seal it with plastic wrap, put it in a constant temperature drying oven at 50 ℃, and heat it for 5 minutes to make it reach a molten state; (2) take 1.0 Porous Al 2 o 3 Added to the molten CaCl 2 ·6H 2 O in a beaker, and stir evenly, put the beaker of the above sample in a vacuum drying oven, vacuumize for 2h, and then put it in the refrigerator for 5h for recrystallization, that is, a new type of CaCl with uniform adsorption is obtained. 2 ·6H 2 O Porous Al 2 o 3 Composite phase change material; (3) The phase change temperature of the obtained composite shape-setting phase change heat storage material is 30.71°C, and the latent heat value of phase change is 99.81 J / g; the SEM photos and DSC test results of this example are as follows Figure 1a , Figure 2a shown.

Embodiment 2

[0016] (1) Take 2g CaCl 2 ·6H 2 O, put it in a beaker, add 0.06 borax, mix evenly, add a small amount of deionized water, seal it with plastic wrap, put it in a constant temperature drying oven at 50 ℃, and heat it for 5 minutes to make it reach a molten state; (2) take 1.2 Porous Al 2 o 3 Added to the molten CaCl 2 ·6H 2 O in a beaker, and stir evenly, put the beaker of the above sample in a vacuum drying oven, vacuumize for 2h, and then put it in the refrigerator for 5h for recrystallization, that is, a new type of CaCl with uniform adsorption is obtained. 2 ·6H 2 O Porous Al 2 o 3 Composite phase change material; (3) The phase change temperature of the obtained composite shape-setting phase change heat storage material is 29.95°C, and the latent heat value of phase change is 86.42 J / g; the SEM photos and DSC test results of this example are as follows Figure 1b , Figure 2b shown.

Embodiment 3

[0018] (1) Take 2g CaCl 2 ·6H 2 O, put it in a beaker, add 0.06 borax, mix well, add a small amount of deionized water, seal it with plastic wrap, put it in a constant temperature drying oven at 50 ℃, and heat it for 5 minutes to make it reach a molten state; (2) Take 1.4 Porous Al 2 o 3 Added to the molten CaCl 2 ·6H 2 O in a beaker, and stir evenly, put the beaker of the above sample in a vacuum drying oven, vacuumize for 2h, and then put it in the refrigerator for 5h for recrystallization, that is, a new type of CaCl with uniform adsorption is obtained. 2 ·6H 2 O Porous Al 2 o 3 Composite phase change material; (3) The phase change temperature of the obtained composite shape-setting phase change heat storage material is 28.34°C, and the latent heat value of phase change is 70.61J / ; the SEM photos and DSC test results of this embodiment are as follows Figure 1c , Figure 2c shown.

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Abstract

The invention provides a packaging shape-stabilizing method of an inorganic hydrated salt phase-change heat storage material, which comprises the following steps: (1) adding a nucleator and deionized water into the inorganic hydrated salt phase-change material, and heating until the inorganic hydrated salt phase-change material achieves the molten state; (2) adding a porous propping material into the molten-state inorganic hydrated salt phase-change material, and stirring sufficiently and uniformly; (3) putting the molten-state mixture obtained in the step (2) in a vacuum environment to enhance the adsorptivity of the porous propping material for the inorganic hydrated salt phase-change material; and (4) moving the molten-state mixture out of the vacuum environment, and immediately putting the molten-state mixture into a low-temperature environment suitable for crystallization to perform recrystallization. The composite shape-stabilized phase-change material obtained by the method has the advantages of stable structure, high latent heat, no toxicity, simple preparation process, short time consumption and low cost.

Description

Technical field [0001] The invention involves the field of material science and technology, and specifically involves a encapsulation method of a kind of inorganic hydraulic salt phase transformer heat storage material. Background technique [0002] The phase -changing material has the advantages of large thermal storage density, small volume of heat storage containers, high heat storage efficiency, constant phase change temperature and recyclable use.Recycling and other fields have extensive application prospects.Inorganic hydrophilic salt, as an important constant low temperature phase change energy storage material, has a fixed phase variable temperature, high phase transformation potential heat, good thermal conductivity and cheap price.However, this kind of solid -phase change material will change in phase change. There are defects of liquid liquidity, leakage, and a certain excessive cold and phase separation. Therefore, it limits its production and life.widely used. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 孙立贤陈娇张焕芝徐芬陈培海
Owner GUILIN UNIV OF ELECTRONIC TECH
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