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Preparation method of stable inorganic hydrated salt-based phase change heat storage material

A phase change heat storage material, inorganic hydrated salt technology, applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of reduced efficiency and phase change material precipitation, and achieves good performance, low corrosion rate, and simple process. Effect

Active Publication Date: 2020-01-03
PIONEER ENERGY JIANGSU
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, due to the problems of supercooling and phase separation of inorganic hydrated salt materials, supercooling leads to a decrease in the efficiency of energy release, and phase separation will lead to the precipitation of phase change materials during use.

Method used

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  • Preparation method of stable inorganic hydrated salt-based phase change heat storage material
  • Preparation method of stable inorganic hydrated salt-based phase change heat storage material
  • Preparation method of stable inorganic hydrated salt-based phase change heat storage material

Examples

Experimental program
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Effect test

Embodiment 1

[0024] This example provides a stable inorganic hydrated salt-based phase change heat storage material, which is composed of anhydrous sodium pyrophosphate and water according to the mass percentage of 60:40. The preparation method is as follows: grind anhydrous sodium pyrophosphate to When the diameter of the particles is less than 50 mesh, add water and stir and place in a water bath at 80°C for heating. After the solid is completely melted into a liquid, shake it evenly and pour it into the container. The volume of the injected container is controlled at 90%, and then cool to room temperature and seal the container. . The obtained phase change heat storage material was tested for cycle stability, and 150 times of charge and discharge cycle tests were carried out. The test results are as follows: figure 1 , 2 As shown, the experiment shows that the plateau temperature of phase change material crystallization is 68.2°C, and the relative undercooling degree is 0.8°C. The mate...

Embodiment 2

[0026] The preparation method of this example is the same as that of Example 1, except that in the phase change heat storage material, the mass percentage of anhydrous sodium pyrophosphate and water is 55:45. Experiments show that the plateau temperature of phase change material crystallization is 62.8°C, as image 3 Shown; its relative subcooling is 1°C.

Embodiment 3

[0028] The preparation method of this example is the same as that of Example 1, except that in the phase change heat storage material, the mass percentage of anhydrous sodium pyrophosphate and water is 65:35. Experiments show that the plateau temperature of phase change material crystallization is 63.5°C, as Figure 4 Shown; its relative subcooling is 1°C.

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Abstract

The invention discloses a preparation method of a stable inorganic hydrated salt-based phase change heat storage material. The phase change heat storage material is prepared by anhydrous sodium pyrophosphate and water according to a mass ratio of 55-65:45-35, and the preparation method of the material is as follows: grinding anhydrous sodium pyrophosphate, adding water and performing stirring, then placing the mixture in a water bath of 80+ / -5 DEG C for heating, performing uniform shaking and performing injecting into a container after the solid is completely melted into a liquid, controllinga volume injected into the container at 90%+ / -2%, and then performing cooling to room temperature. The phase change heat storage material prepared by the method has good stability, relatively high phase change latent heat, and large material density, a platform temperature of crystallization is appropriate, and the sub-cooling degree does not exceed 1 DEG C. The phase change energy storage material has a simple and convenient preparation process, is easy to package, is insensitive to metal corrosion, is convenient for production, and has relatively potential application value in the field of clean heating supply.

Description

technical field [0001] The invention relates to the technical field of phase-change heat storage materials, in particular to a preparation method of a stable inorganic hydrated salt-based phase-change heat storage material. Background technique [0002] Energy is the core force of economic development. With the rapid development of the economy and the increasingly prominent energy shortage, there are obvious inconsistencies in energy supply and deployment, such as the peak-to-valley difference in power loads, intermittent solar and wind energy, etc. nature, intermittent operation in industrial production, etc. Therefore, the development of new energy sources and the improvement of energy utilization have received great attention. Energy storage technology is a technology that uses energy storage materials to efficiently store solar thermal energy, industrial waste heat, and some low-quality energy, which can greatly improve the energy utilization rate of the entire system. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 于国强王维奕马振国崔谢亮李文刘硕
Owner PIONEER ENERGY JIANGSU
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