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Inorganic phase change energy storage material

An energy storage material and inorganic phase change technology, applied in the field of energy storage materials, can solve the problems of energy storage system energy storage density reduction, etc., and achieve the effects of large thermal conductivity, good crystallinity, and large volume heat storage density

Inactive Publication Date: 2012-07-25
SHANGHAI XUNENG NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The anti-supercooling agent mainly acts as a nucleating agent and modifier, mainly including borax, calcium sulfate, and activated clay; the anti-phase separation agent mainly includes polymer water-absorbing resin, carboxymethyl cellulose, and surfactant materials; In actual production, excess water is usually added to reduce the formation of anhydrous salt and prevent fluidized bed clogging, but this method also leads to a significant reduction in the energy storage density of the energy storage system

Method used

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  • Inorganic phase change energy storage material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The barium carbonate (nucleating agent) of 0.25Kg, the sodium polyaspartate (modifier) ​​of 0.1Kg and 0.15Kg water are fully mixed, and then heated to more than 60° C. to obtain a uniformly mixed mixture; Add 99.5Kg of barium hydroxide octahydrate to the mixture, heat the mixture to about 80°C to fully melt the barium hydroxide octahydrate, stir vigorously after melting until the mixture of the four materials is uniform, until the mixture does not have stratification, that is, the obtained Product A1.

[0024] The above obtained product A1 was subjected to DSC analysis, and the results are shown in Table 1. In addition, the step cooling curve test was carried out on the product A1, and the results are shown in Table 2.

Embodiment 2

[0026] Mix 2.0Kg of calcium carbonate (nucleating agent), 1.0Kg of hydrolyzed maleic anhydride (modifier) ​​and 4.5Kg of water thoroughly, then heat to above 60°C to obtain a uniformly mixed mixture; Add 93Kg of sodium acetate trihydrate, heat the mixture to about 80°C to fully melt the sodium acetate trihydrate, stir vigorously after melting until the mixture of the four materials is uniform, until the mixture does not have stratification, and the product A2 is obtained.

[0027] The above obtained product A2 was subjected to DSC analysis, and the results are shown in Table 1. In addition, the step cooling curve test was carried out on the product A2, and the results are shown in Table 2.

Embodiment 3

[0029] 1.5Kg of strontium carbonate (nucleating agent), 2.0Kg of sodium hydroxymethyl cellulose (modifier) ​​and 3.0Kg of water, fully mixed, then heated to more than 60 ° C to obtain a uniform mixture; Add 87Kg of sodium sulfate dodecahydrate to the mixture, heat the mixture to about 80°C to fully melt the sodium sulfate dodecahydrate, stir vigorously after melting until the mixture of the four materials is uniform, until the mixture has no stratification, and the product is obtained A3.

[0030] The above obtained product A3 was analyzed by DSC, and the results are shown in Table 1. In addition, the step cooling curve test was carried out on the product A3, and the results are shown in Table 2.

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Abstract

The invention relates to the technical field of energy storage material, in particular to inorganic phase change energy storage material. The material comprises the following components by mass: 70 to 99.5 % of energy storage material, 0.25-20 % of nucleating agent, 0.1-15 % of modifying agent and 0.1-15 % of water. The bases hydrate or crystalline hydrous salt, especially the bases hydrate is adopted as energy storage material; the nucleating agent adopts carbonate; and the modifying agent is dispersant. According to the inorganic phase change energy storage material, by selecting proper nucleating agent and the ration of the nucleating agent, material phase separation can be effectively solved, especially the phase change energy storage material prepared by adding the dispersant into a system has good cycling stability, and simultaneously the potential heat value does not change after circulation for thousands of times.

Description

technical field [0001] The invention relates to the technical field of energy storage materials, in particular to an inorganic phase change energy storage material. Background technique [0002] Research on energy storage is a strategic topic of energy security and sustainable development, in which heat storage and application are closely related to international people's livelihood. Energy storage technology, especially phase change energy storage technology, is an important technology to rationally and effectively utilize existing energy, optimize the use of renewable energy, and improve energy utilization efficiency. It has been a very active research direction in the field of energy conservation in the world in the past 20 years. [0003] Using the phase transition of materials to store energy and realize energy storage and utilization is an effective way to alleviate the mismatch between energy supply and demand in terms of time, intensity and location. That is, the us...

Claims

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Application Information

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IPC IPC(8): C09K5/06
Inventor 刘硕刘承梅冯英俊
Owner SHANGHAI XUNENG NEW ENERGY TECH
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