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Inorganic phase-changing energy storage material

A technology of energy storage materials and inorganic phase change, applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of phase separation and corrosion, high degree of subcooling of crystal water, etc., and achieve high heat of solution and good flow. The effect of low cost and low cost of raw materials

Inactive Publication Date: 2017-08-04
北京华厚能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, crystal water has disadvantages such as large degree of supercooling, phase separation and corrosion. In order to reduce its degree of supercooling and suppress the occurrence of phase separation, it is necessary to add a certain amount of nucleating agent and thickener to improve it in practical applications. In order to avoid subsequent problems caused by phase separation, it is necessary to add an appropriate amount of water to improve the overall material

Method used

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Examples

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experiment example 1

[0025] Weigh 100g of barium hydroxide octahydrate, 5.44g of expanded graphite, 2.70g of potassium dihydrogen phosphate, and 0.55g of deionized water and place them in a reaction vessel, and directly store heat on the inorganic phase change energy storage material of the present invention through a continuous relay. Stirring was continued in the reactor for 30 minutes, and the temperature was controlled at 85°C for melting until the samples were mixed uniformly to obtain a phase-change energy storage material. The measured enthalpy value of the inorganic phase change energy storage material is 580kJ / L, and the density reaches 2.07g / cm 3 .

experiment example 2

[0027] Weigh 100g of barium hydroxide octahydrate, 3.13g of calcium chloride dihydrate, and 1.04g of gelatin, and place them in a reaction vessel, and directly store heat on the inorganic phase change energy storage material of the present invention through a continuous relay. Stirring was continued in the reactor for 30 minutes, and the temperature was controlled at 85°C for melting until the samples were mixed uniformly to obtain a phase-change energy storage material. The measured enthalpy value of the inorganic phase change energy storage material is 526kJ / L, and the density reaches 1.98g / cm 3 .

experiment example 3

[0029] Weigh 100g of sodium acetate trihydrate, 1.06g of gelatin, 1.06g of potassium dihydrogen phosphate, 0.53g of deionized water, and 3.17g of borax, and place them in the reaction vessel, and directly carry out the inorganic phase change energy storage material of the present invention through a continuous relay. Heat storage. Stirring was continued in the reactor for 30 minutes, and the temperature was controlled at 85°C for melting until the samples were mixed uniformly to obtain a phase-change energy storage material. The measured enthalpy value of the inorganic phase change energy storage material is 312kJ / L, and the density reaches 1.40g / cm 3 .

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Abstract

The invention relates to the technical field of energy storage materials, in particular to an inorganic phase-changing energy storage material. The inorganic phase-changing energy storage material is prepared from the following components in percentage by mass: 86 to 98.5 percent of inorganic materials, 0.5 to 3 percent of nucleating agents, 1 to 10 percent of thickening agents, and 0 to 1 percent of water. The obtained phase-changing energy storage material is low in price, good in recycling stability, capable of effectively solving the phase separation problem of the materials, and constant in potential heat value after being recycled for thousand times.

Description

technical field [0001] The present invention relates to an inorganic phase change energy storage material. Background technique [0002] In recent years, heat storage energy storage technology has been widely used in the fields of renewable energy utilization and energy saving and consumption reduction. Energy storage technology has become a strategic issue for energy security and sustainable development. Among many energy storage methods, the latent heat energy storage method of solid-liquid phase change materials is widely used in air conditioning energy saving, solar energy utilization, thermal design of electronic equipment, and building energy saving due to its high latent heat, high density and relatively constant phase transition temperature. and other fields. [0003] The more economical inorganic phase change materials are crystalline hydrated salts. They all have a large heat of solution and a fixed melting point. When the temperature rises, the crystalline hydrat...

Claims

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Application Information

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IPC IPC(8): C09K5/06
Inventor 贾维王骁
Owner 北京华厚能源科技有限公司
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