Inorganic hydrated salt phase change material and preparation method thereof

A phase-change energy storage material and inorganic hydrated salt technology, which is applied in heat exchange materials, chemical instruments and methods, etc., can solve the problem of supercooling of inorganic phase-change materials and shorten the service life of inorganic hydrated-salt phase-change materials. , limiting the application range of phase change materials and other issues, to achieve the effect of eliminating supercooling, less demanding instrument conditions, and no potential safety hazards

Active Publication Date: 2018-08-28
QINGHAI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To solve the supercooling problem of inorganic hydrated salt phase change energy storage materials, the main method is to add nucleating agents. According to the "nucleating agent screening theory with 15% difference in lattice parameters", the commonly used nucleating agents are: Na 2 B 4 o 7 10H 2 O, SrCl 2 ·6H 2 O, CO (NH 2 ) 2 、BaCO 3 , Sr(OH) 2 ·8H 2 O, Na 2 HPO 4 12H 2 O, Na 2 SiO 3 9H 2 O, etc. Most of the above nucleating agents exist in the form of crystalline h

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation method of inorganic hydrated salt phase change energy storage material at 10°C is as follows:

[0025] Calculated by the weight of the total amount of 100g, take 74.5g sodium sulfate decahydrate as inorganic hydrated salt, 8.5g xanthan gum as adhesive, 4.5g expanded graphite as thermal conductivity agent, and 4.5g sodium hexametaphosphate as modifier , 8g nanoscale material (ZrB 2 , SiO 2 and SiB 6 ) as a nucleating agent, magnetically stirred in a constant temperature water bath at 60°C for 1 hour until completely melted, and the prepared inorganic hydrate salt phase change energy storage material was packaged and stored in a packaging machine for future use.

[0026] The inorganic hydrate salt phase change energy storage material that eliminates the supercooling phenomenon prepared above is used to measure the supercooling degree of the inorganic hydrate salt phase change energy storage material with a thermal constant analyzer; The thermal performa...

Embodiment 2

[0028] The preparation method of inorganic hydrated salt phase change energy storage material at 15°C is as follows:

[0029] Calculated by the weight of a total amount of 100g, get 75g calcium chloride hexahydrate as inorganic hydrated salt, 9g xanthan gum as adhesive, 8g expanded graphite as heat conduction agent, 6g boric acid as modifier, 2g nanoscale material ( BC 4 and SiB 6 ) as a nucleating agent, magnetically stirred in a constant temperature water bath at 55°C for 1.4 hours until completely melted, and the prepared inorganic hydrate salt phase change energy storage material was packaged and stored in a packaging machine for future use.

[0030] The inorganic hydrate salt phase change energy storage material that eliminates the supercooling phenomenon prepared above is used to measure the supercooling degree of the inorganic hydrate salt phase change energy storage material with a thermal constant analyzer; The thermal performance test measures the phase change temp...

Embodiment 3

[0032] The preparation method of inorganic hydrated salt phase change energy storage material at 25°C is as follows:

[0033] Calculated by the weight of a total of 100g, take 65g of calcium chloride hexahydrate as inorganic hydrated salt, 10g of xanthan gum as adhesive, 15g of expanded graphite as thermal conductivity agent, 8g of sodium hexametaphosphate as modifier, 2g of nano grade material (SiB 6 ) as a nucleating agent, magnetically stirred in a constant temperature water bath at 50°C for 1.5 hours until completely melted, and the prepared inorganic hydrate salt phase change energy storage material was packaged and stored in a packaging machine for future use.

[0034] The inorganic hydrate salt phase change energy storage material that eliminates the supercooling phenomenon prepared above is used to measure the supercooling degree of the inorganic hydrate salt phase change energy storage material with a thermal constant analyzer; The thermal performance test measures t...

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Abstract

The invention relates to the field of a phase change material, in particular to an inorganic hydrated salt phase change material and a preparation method thereof. The inorganic hydrated salt phase change material is prepared from the following components by weight percent: 65 to 75 percent of heat storage agent, 8.5 to 10 percent of xanthan gum, 4.5 to 15 percent of heat conducting material, 4.5 to 8 percent of modifier and 2 to 10 percent of nucleating agent. The inorganic hydrated salt phase change material has the advantages that the cold phenomenon can be completely eliminated, the energystorage density is high, the phase change volume is small, the inorganic hydrated salt phase change material is nontoxic, non-volatile, stable in performance, good in repeatability and convenient in use; the service life of the phase change material is effectively prolonged; and the phase change temperature of the phase change material is 10 to 30 DEG C, the heat conducting performance is good, the phase change reversibility is good, the phase changetransition is fast, and the heat storage performance is good.

Description

technical field [0001] The invention relates to the field of phase change materials, in particular to an inorganic hydrated salt phase change energy storage material and a preparation method thereof. Background technique [0002] The competition in the 21st century is the competition of energy. As the largest developing country in the world, my country is facing enormous pressure from population, resources and environment. The development of energy has played an important role in reducing poverty, increasing employment opportunities and improving the quality of life. [0003] As a new type of energy-saving and energy-storage material, inorganic hydrated salt phase-change energy storage materials use their latent heat to store and release energy to solve the problem of energy spatio-temporal mismatch, achieve energy recycling and improve energy utilization. Inorganic hydrated salt phase-change energy storage materials absorb heat at high temperatures, store excess external h...

Claims

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Application Information

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IPC IPC(8): C09K5/06
CPCC09K5/063Y02E60/14
Inventor 铁生年李秀丽
Owner QINGHAI UNIVERSITY
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