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Mirabilite-based phase change material and method for dissolving mirabilite-based phase change material in glycerol system

A technology of phase change material and Glauber's salt, which is applied in the field of Glauber's salt-based phase change materials and its dissolution in glycerin system, can solve the problems of incomplete crystallization and poor cycle stability of Glauber's salt composite phase change materials, and achieve complete crystallization and crystallization volume. Complete, highly crystalline effect

Pending Publication Date: 2022-03-15
QINGHAI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although some progress has been made in the research on Glauber's salt phase change materials, the Glauber's salt composite phase change materials prepared by the above methods always have the problems of incomplete crystallization and poor cycle stability.

Method used

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  • Mirabilite-based phase change material and method for dissolving mirabilite-based phase change material in glycerol system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A mirabilite-based phase change material consists of the following raw materials in parts by weight: 49.5 parts of mirabilite, 5.5 parts of sodium carbonate decahydrate, 3 parts of borax, 7 parts of solid sodium hydroxide, 20 parts of glycerin and 80 parts of water. Its dissolving steps are:

[0036] S1, with salt

[0037] Weigh 5.5g of sodium carbonate decahydrate and 49.5g of Glauber's salt at a ratio of 1:9, mix the two, and stir evenly to obtain the solute of Glauber's salt-based compound salt.

[0038] S2, preparation of glycerin solvent

[0039] Weigh 20g of glycerin, 80g of water, and 7g of solid sodium hydroxide, first heat the aqueous solution to 50°C, then add sodium hydroxide to the aqueous solution, stir until the sodium hydroxide is completely dissolved, then add glycerin, and continue stirring at this temperature for 10min , to obtain glycerol solvent.

[0040] S3. Preparation of mirabilite-based phase change material

[0041] Add the mirabilite-based ...

Embodiment 2

[0045] A mirabilite-based phase change material consists of the following raw materials in parts by weight: 90 parts of mirabilite, 10 parts of sodium carbonate decahydrate, 7 parts of borax, 10 parts of solid sodium hydroxide, 25 parts of glycerin and 100 parts of water. Its dissolving steps are:

[0046] S1, with salt

[0047] Weigh 10g of sodium carbonate decahydrate and 90g of Glauber's salt at a ratio of 1:9, mix the two, and stir evenly to obtain the Glauber's salt-based compound salt solute.

[0048] S2, preparation of glycerin solvent

[0049] Weigh 25g of glycerin, 100g of water, and 10g of solid sodium hydroxide, first heat the aqueous solution to 50°C, then add sodium hydroxide to the aqueous solution, stir until the sodium hydroxide is completely dissolved, then add glycerin, and continue stirring at this temperature for 10min , to obtain glycerol solvent.

[0050] S3. Preparation of mirabilite-based phase change material

[0051] Add the mirabilite-based compo...

Embodiment 3

[0055] A mirabilite-based phase change material consists of the following raw materials in parts by weight: 72 parts of mirabilite, 8 parts of sodium carbonate decahydrate, 5 parts of borax, 8 parts of solid sodium hydroxide, 23 parts of glycerin and 92 parts of water. Its dissolving steps are:

[0056] S1, with salt

[0057] Weigh 8g of sodium carbonate decahydrate and 72g of Glauber's salt at a ratio of 1:9, mix the two, and stir evenly to obtain the solute of Glauber's salt.

[0058] S2, preparation of glycerin solvent

[0059] Weigh 23g of glycerin, 92g of water, and 8g of sodium hydroxide solid, first heat the aqueous solution to 50°C, then add sodium hydroxide to the aqueous solution, stir until the sodium hydroxide is completely dissolved, then add glycerin, and continue stirring at this temperature for 10min , to obtain glycerol solvent.

[0060]S3. Preparation of mirabilite-based phase change material

[0061] Add the mirabilite-based compound salt solute obtained...

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Abstract

The invention relates to the field of phase change materials, and particularly discloses a mirabilite-based phase change material and a dissolving method thereof in a glycerol system. The mirabilite-based phase change material is prepared from the following raw materials in parts by weight: 49.5 to 90 parts of mirabilite, 5.5 to 10 parts of sodium carbonate decahydrate, 3 to 7 parts of borax, 7 to 10 parts of sodium hydroxide solid, 20 to 25 parts of glycerol and 80 to 100 parts of water. The dissolving method comprises the following steps: S1, preparing salt; S2, preparing a glycerol solvent; S3, preparing the mirabilite-based phase change material; and S4, standing and forming. The mirabilite-based phase change material disclosed by the invention is more complete in crystallization and better in cycling stability; in addition, the dissolving method provided by the invention has the advantages of simple and accurate process flow operation, and time and labor saving.

Description

technical field [0001] This application relates to the field of phase-change materials, more specifically, it relates to a mirabilite-based phase-change material and its dissolution method in a glycerin system. Background technique [0002] The solubility of Glauber's salt in the water phase and its use as a phase change material have been reported in the 1980s. With the continuous research on Glauber's salt phase change materials in recent years, its existing problems have gradually been exposed. Large, phase separation and other problems, and then also proposed to solve the subcooling and phase separation by adding nucleating agent and thickener. [0003] Although the research on Glauber's salt phase change materials has made some progress, the Glauber's salt composite phase change materials prepared by the above methods always have the problems of incomplete crystallization and poor cycle stability. Contents of the invention [0004] In order to make the mirabilite-bas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/06
Inventor 柳馨孙增宝铁生年汪长安王亮陈凤兰
Owner QINGHAI UNIVERSITY
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