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Calcium chloride hexahydrate phase change energy storage material composition

A technology of material composition and phase change energy storage, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of uneven distribution of nucleating agents and ineffective phase change of products, and achieve excellent temperature regulation function , high phase transition stability, and high phase transition latent heat value

Inactive Publication Date: 2011-07-27
益田润石(北京)化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] Another object of the present invention is to solve the quality problem that the nucleating agent is unevenly distributed in the phase change system, which causes some products to fail to effectively undergo phase change after packaging

Method used

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  • Calcium chloride hexahydrate phase change energy storage material composition

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] First take anhydrous CaCl 2 and H 2 O is dissolved in a molar ratio of 1:6 to make CaCl 2 ·6H 2 O, and cooled to 40°C for further use. Dissolve the nucleating agent composition in 100 g of liquid CaCl at 40°C with stirring 2 ·6H 2 O, the stirring time was 1 hour. According to the T-History test method to test its supercooling degree, the cooling environment is a constant temperature water bath at 15°C. The analysis results are shown in Table 1:

[0030] Table 1 Effect of composition and dosage of nucleating agent on undercooling degree of phase change material

[0031]

Embodiment 2

[0033]Get the 200g liquid CaCl prepared in embodiment 1 2 ·6H 2 O, while maintaining 40°C and stirring, add 4g Na in sequence 2 MoO 4 , 4gCsCl 2 , 6gKCl, 3gNH 4 Cl, 1gCaSO4, 0.6gNaCl, stirring time is 1 hour. The phase transition temperature of the obtained mixture was measured to be 24.3° C., the supercooling degree was 2.1° C., and the phase transition latent heat value was 185.1 kJ / kg. After 3000 times of cold and heat cycle tests, the latent heat value of phase transition was measured to be 176.7kJ / kg (the latent heat value decreased by 4.5%), and a small amount of water precipitated visually after crystallization.

Embodiment 3

[0035] Get the 100g liquid CaCl prepared in embodiment 1 2 ·6H 2 O, while maintaining 40°C and stirring, add 1.75g ​​Na 2 MoO 4 , 5.25gBaCl 2 , 8gKCl, 5gNH 4 Cl, 1gCaSO4, 0.5gNaCl, stirring time is 1 hour. The phase transition temperature of the obtained mixture was measured to be 23.6° C., the supercooling degree was 2.5° C., and the phase transition latent heat value was 183.4 kJ / kg. After 3000 times of cold and heat cycle tests, the latent heat value of phase transition was measured to be 172.6kJ / kg (the latent heat value decreased by 5.9%), and a small amount of water precipitated visually after crystallization.

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Abstract

The invention discloses a calcium chloride hexahydrate phase change energy storage material composition, which comprises calcium chloride hexahydrate, a nucleating agent, a thickener, other functional additives and the like. The phase change temperature of the composition is 23 to 25 DEG C, the degree of supercooling is less than 3 DEG C, and the latent heat of phase change is more than 180kJ / kg. The composition has high phase change stability, passed 3,000 times of tests of cold and hot circulation and can keep the uniform distribution of the nucleating agent in a short time period.

Description

technical field [0001] The invention relates to a phase change energy storage material composition, which has a phase change temperature of 23-25°C, an undercooling degree of less than 3°C, and the composition has a relatively high phase change latent heat value, which can reach 180kJ / kg. It has excellent temperature regulation function and extremely high phase transition stability. It has been tested more than 3000 times in cold and hot cycle tests. The phase change energy storage material composition obtained according to the present invention can be used for solar heat storage, waste heat recovery, indoor temperature regulation and the like. Background technique [0002] In the process of energy conversion and utilization, there are often contradictions between supply and demand that cannot be effectively matched in time and space, such as peak-to-valley differences in power loads caused by electricity consumption, intermittent supply of solar energy, wind energy, and oce...

Claims

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Application Information

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IPC IPC(8): C09K5/06
Inventor 万福新王金波杜守琴袁雪飞李刚刘佳
Owner 益田润石(北京)化工有限公司
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