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Phase-change heat storage material, and preparation method and application thereof

A technology of phase change heat storage materials and reinforcement materials, applied in heat exchange materials, heat storage equipment, energy storage, etc., can solve the problems of complex preparation process, low phase change latent heat, low thermal conductivity, etc. Effects of separation, high latent heat of phase change, and high thermal conductivity

Inactive Publication Date: 2020-08-21
SHENZHEN ENESOON ENERGY STORAGE TECH INNOVATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned energy storage materials have many additives, high cost, complicated preparation process, and low latent heat of phase change.
[0009] Therefore, it is urgent to solve the problems of low thermal conductivity, large supercooling degree and easy phase separation of hydrated salt phase change heat storage materials, and develop a high phase change latent heat, high thermal conductivity, small supercooling degree, phase separation elimination, and cycle stability. The hydrated salt phase change heat storage materials with good properties are the difficulties that need to be overcome at present

Method used

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  • Phase-change heat storage material, and preparation method and application thereof
  • Phase-change heat storage material, and preparation method and application thereof

Examples

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Embodiment 1

[0047] This embodiment provides a phase change heat storage material.

[0048] The phase change heat storage material comprises the following components by weight fraction: 94% of sodium acetate trihydrate, 2.7% of borax, 3% of carboxymethyl cellulose, and 0.3% of nano silicon dioxide.

[0049] The preparation method of the phase change heat storage material described in this embodiment includes the following steps:

[0050] First heat and melt sodium acetate trihydrate at 80°C for 20 minutes, add borax and carboxymethyl cellulose for the first mixing at 75°C for 15 minutes, then add nano silicon dioxide and mix for the second time at 80°C for 30 minutes, The phase-change heat storage material was obtained, wherein the first mixing and the second mixing were accompanied by agitation, and the rotation speed of the agitation was 1000 rpm.

[0051] figure 1 The step cooling curve and heating curve of the phase change heat storage material provided in this example. Wherein, the...

Embodiment 2

[0053] This embodiment provides a phase change heat storage material.

[0054] The phase change heat storage material includes the following components by weight fraction: 97% of sodium acetate trihydrate, 1.2% of disodium hydrogen phosphate dodecahydrate, 1.5% of gelatin, and 0.3% of graphite powder.

[0055] The preparation method of the phase change heat storage material described in this embodiment includes the following steps:

[0056] First heat and melt sodium acetate trihydrate at 75°C for 25 minutes, add disodium hydrogen phosphate dodecahydrate and gelatin for the first mixing at 80°C for 10 minutes, then add graphite powder for the second mixing at 70°C for 40 minutes, The phase change heat storage material was obtained, wherein the first mixing and the second mixing were accompanied by agitation, and the rotation speed of the agitation was 800 rpm.

Embodiment 3

[0058] This embodiment provides a phase change heat storage material.

[0059] The phase-change heat storage material includes the following components by weight fraction: 93.5% of sodium acetate trihydrate, 1% of sodium pyrophosphate decahydrate, 5% of gelatin, and 0.5% of nano-alumina.

[0060] The preparation method of the phase change heat storage material described in this embodiment includes the following steps:

[0061] First heat and melt sodium acetate trihydrate at 80°C for 15 minutes, add sodium pyrophosphate decahydrate and gelatin and mix for the first time at 80°C for 20 minutes, then add nano-alumina and mix for the second time at 75°C for 35 minutes to obtain In the phase change heat storage material, stirring is accompanied during the first mixing and the second mixing, and the stirring speed is 900 rpm.

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Abstract

The invention provides a phase-change heat storage material, and a preparation method and application thereof. The phase-change heat storage material is prepared from, by weight, 90-98% of sodium acetate trihydrate, 1-5% of a nucleating agent, 0.1-5% of a thickening agent and 0.1-0.5% of a reinforcing material. The four components are combined together for the first time, and the weight ratio of all the components is optimized to obtain the hydrated salt phase-change heat storage material which is high in phase change latent heat, high in heat conductivity, small in supercooling degree, capable of eliminating phase separation and good in cycling stability. The reinforcing material is creatively added, and the reinforcing material can be uniformly dispersed in a phase-change heat storage material system to form a strong heat conduction network, so that the heat conduction performance of the obtained phase-change heat storage material is improved by at least two times, and the application range of the material is greatly expanded. The preparation method of the phase-change energy storage material provided by the invention is simple to operate, low in cost and suitable for industriallarge-scale production.

Description

technical field [0001] The invention relates to the technical field of energy storage materials, in particular to a phase-change heat storage material and its preparation method and application, in particular to a phase-change heat storage material suitable for clean energy heating and its preparation method and application. Background technique [0002] In response to the increasingly serious environmental pollution problem, China has introduced many policies and guidelines in recent years to vigorously promote the development and application of clean energy. Clean energy heating refers to the use of clean, non-polluting, non-emission or low-emission energy for heating, such as natural gas, electric boilers, combined heat and power, geothermal energy, air energy, biomass energy, etc. However, in the process of promoting clean energy heating, there are still unavoidable problems that need to be solved urgently, including the high cost of electric heating, serious waste of el...

Claims

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Application Information

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IPC IPC(8): C09K5/06F24S60/10F28D20/02
CPCC09K5/063F28D20/02F24S60/10Y02E10/40Y02E60/14Y02E70/30
Inventor 曾智勇闵书学廖小亮聂海宁杨景皓
Owner SHENZHEN ENESOON ENERGY STORAGE TECH INNOVATION CO LTD
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