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A nano-modified sodium acetate trihydrate phase-change heat storage material and its preparation method

A phase-change heat storage material, the technology of sodium acetate trihydrate, which is applied in the directions of heat exchange materials, chemical instruments and methods, etc., can solve the problems of high price of hydroxylated graphene, increase of equipment production cost, and no solution to phase separation, etc., Achieve the effect of easy mass production, prevent phase separation, and improve thermal conversion efficiency

Active Publication Date: 2021-11-12
NARI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem of phase separation of sodium acetate trihydrate phase change materials is not solved, and the price of hydroxylated graphene is relatively high, which increases the production cost of equipment

Method used

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  • A nano-modified sodium acetate trihydrate phase-change heat storage material and its preparation method
  • A nano-modified sodium acetate trihydrate phase-change heat storage material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A nano-modified sodium acetate trihydrate phase-change heat storage material, the preparation method of which is:

[0042] (1) Weigh 95g of sodium acetate trihydrate;

[0043] (2) cellulose 2g;

[0044] (3) Nano silicon carbide (45nm) 0.5g;

[0045] (4) graphite 10g;

[0046] (5) Put the above four substances together in a zirconia ball mill jar, the balls are zirconia balls, the ball-to-material ratio is 20:1; the ball milling speed is 200rpm, and the ball milling time is 1 hour;

[0047] (6) Put the mixture into a stainless steel flat-bottomed test tube, place the test tube in a constant temperature water bath at 65°C until it becomes a uniform black paste liquid, and cool it to room temperature in a cold bath to obtain nano-silicon carbide modified three Sodium acetate water phase change heat storage material.

Embodiment 2

[0049] As described in Example 1, the difference is: in step (1), sodium acetate trihydrate is respectively 90g and 99g.

Embodiment 3

[0051] As described in Example 1, the difference is that the cellulose in step (2) is 0.5g, 1g and 1.5g respectively.

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Abstract

The invention discloses a nano-modified sodium acetate trihydrate phase-change heat storage material and a preparation method thereof, comprising 90-99 parts of sodium acetate trihydrate, 0.5-2 parts of nanoparticles, and 0.5-2.5 parts of cellulose and 5-10 parts of graphite, the nanoparticles are at least one or more of neutral particles and polar particles, and the nanoparticles do not chemically react with water, and the average particle size of the nanoparticles is less than 50nm. Its phase transition temperature is 54~58°C, the degree of supercooling is less than 4°C, and the latent heat of phase transition is greater than 200kJ / kg. The invention adopts nano particle modification, improves the thermal cycle stability of the sodium acetate trihydrate phase change material, and the material has no thermal performance attenuation after more than 800 charge and discharge cycle tests. The phase change material of the invention is green and environment-friendly, has a simple preparation method, is easy to realize mass production, is beneficial to stable storage and withdrawal of heat, and improves heat conversion efficiency.

Description

technical field [0001] The invention relates to a nano-modified sodium acetate trihydrate phase-change heat storage material and a preparation method thereof, belonging to the technical field of phase-change heat storage and energy-saving and environment-friendly materials. Background technique [0002] Heat energy is an important form of energy in the process of all life activities, and more than 90% of energy needs to be transformed and utilized through the form and link of heat energy. However, the current form of energy use poses a huge challenge to the carrying capacity of the environment. In order to achieve high-efficiency, low-carbon, and environment-friendly development of terminal energy consumption, we will continue to deepen the form of energy use and vigorously advocate green development of comprehensive energy. The emergence and rapid development of heat storage technology can promote the structural adjustment of renewable energy and realize the complementary ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 孙富华杨肖叶闻杰杨波王启扬刘杨李雪洁杨冬梅杜炜
Owner NARI TECH CO LTD
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