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Nano-modified sodium acetate trihydrate phase change heat storage material and preparation method thereof

A phase-change heat storage material, sodium acetate trihydrate technology, applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of high price of hydroxylated graphene, increase of equipment production cost, and failure to solve phase separation, etc. Achieve the effects of increasing heat conduction efficiency, improving thermal conductivity, and improving heat conversion efficiency

Active Publication Date: 2020-09-04
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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  • Nano-modified sodium acetate trihydrate phase change heat storage material and preparation method thereof
  • Nano-modified sodium acetate trihydrate phase change heat storage material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A nano-modified sodium acetate trihydrate phase change heat storage material, the preparation method 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 materials together in a zirconia ball milling tank, the grinding ball is zirconia ball, 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 65°C constant temperature water bath until it becomes a uniform black paste-like liquid. After cooling to room temperature in a cold bath, the nano-silicon carbide modified three is obtained. Water sodium acetate phase change heat storage material.

Embodiment 2

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

Embodiment 3

[0051] As described in Example 1, the difference is that the cellulose in step (2) is 0.5 g, 1 g, and 1.5 g, 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. The material is composed of, by mass, 90-99 parts of sodium acetate trihydrate, 0.5-2 parts of nano-particles, 0.5-2.5 parts of cellulose and 5-10 parts of graphite, wherein the nano-particles are at least one or a composition of neutral particles and polar particles, the nano-particles do not chemically react with water, and the average particle size of the nano-particles is smaller than 50nm. The phase change temperature is 54-58 DEG C, the degree of supercooling is less than 4 DEG C, and the latent heat of phase change is more than 200kJ / kg. The nano-particles are adopted for modification, the thermal cycle stability of the sodium acetate trihydrate phase change material is improved, and no thermal performance attenuation exists after the material is subjected to 800 times or more of heat charging and discharging cycle tests. The phase change material is green and environmentally friendly, the preparation method is simple, batch production is easy to achieve, stable access of heat is facilitated, and the heat conversion efficiency is improved.

Description

Technical field [0001] The invention relates to a nano-modified sodium acetate trihydrate phase-change heat storage material and a preparation method thereof, and belongs to the technical field of phase-change heat storage and energy-saving environmental protection materials. Background technique [0002] Thermal energy is an important form of energy in the process of all life activities. More than 90% of the energy needs to be transformed and utilized in the form and links of thermal energy. However, the current forms of energy use have brought huge challenges 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 forms of energy use and vigorously advocate the green development of integrated energy. The generation and rapid development of heat storage technology can promote the adjustment of renewable energy structure and realize the comple...

Claims

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Application Information

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Patent Type & Authority Applications(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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