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Phase change heat storage material, phase change heat storage brick and preparation method thereof

A phase change heat storage material and phase change material technology, applied in the field of phase change heat storage bricks and its preparation, and phase change heat storage materials, can solve the problems of low heat storage density and poor thermal stability, and achieve high energy storage density , enhanced thermal stability, easy operation control and management effects

Active Publication Date: 2019-02-12
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome defects such as low heat storage density and poor thermal stability of heat storage materials in the prior art, thereby providing a phase change heat storage material, a phase change heat storage brick and a preparation method thereof

Method used

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  • Phase change heat storage material, phase change heat storage brick and preparation method thereof

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Embodiment 1

[0034] This embodiment provides a phase change heat storage brick and its preparation method, the preparation method of the phase change heat storage brick includes the following steps:

[0035] MgO with a particle size of 50 μm and magnesia (MS-96) with a particle size of 0.1 mm (MS-96) were selected and mixed uniformly at a mass ratio of 7:3 to obtain a skeleton material for subsequent use; Na 2 CO 3 and K 2 CO 3 Mix evenly according to the mass ratio of 52.2:47.8 to obtain the phase change material for later use; the polyvinyl alcohol aqueous solution and kaolin are respectively weighed according to the mass ratio of 3:7, and for later use; wherein, the mass ratio of the skeleton material, the phase change material and the binder is 59:40 :1.

[0036] Add the skeleton material, phase change material and sodium silicate into the mixer in sequence, and the mixing time is 30 minutes; add them into the kneader, and at the same time add a polyvinyl alcohol aqueous solution wi...

Embodiment 2

[0038] This embodiment provides a phase change heat storage brick and its preparation method, the preparation method of the phase change heat storage brick includes the following steps:

[0039] Select MgO with a particle size of 30 μm and MS-96 with a mass ratio of 9:1 to mix uniformly to obtain a skeleton material for subsequent use; Li 2 CO 3 、Na 2 CO 3 and K 2 CO 3 Mix uniformly by mass ratio 4.4:45:50.6 to obtain phase change material for subsequent use; polyvinyl alcohol aqueous solution, borax and sodium silicate are weighed respectively by mass ratio 5:3:2, wherein borax and sodium silicate are mixed uniformly for subsequent use; , the mass ratio of skeleton material, phase change material and binder is 32:60:8.

[0040] Add the skeleton material, phase change material and sodium silicate into the mixer in turn, and the mixing time is 60 minutes; add them into the kneader, and at the same time add polyvinyl alcohol with a mass fraction of 7%, knead for 20 minutes, a...

Embodiment 3

[0042] This embodiment provides a phase change heat storage brick and its preparation method, the preparation method of the phase change heat storage brick includes the following steps:

[0043] MgO with a particle size of 40 μm and MS-96 with a particle size of 0.5 mm were selected and mixed uniformly at a mass ratio of 9:1 to obtain a skeleton material for subsequent use; Li 2 CO 3 、Na 2 CO 3 and K 2 CO 3 Mix evenly according to the mass ratio 2.2:48.6:49.2 to obtain the phase change material for subsequent use; the polyvinyl alcohol aqueous solution and borax are respectively weighed according to the mass ratio of 4:6 for subsequent use; wherein, the mass ratio of the skeleton material, the phase change material and the binder is 32 :60:8.

[0044] Add the skeleton material, phase change material and sodium silicate into the mixer in turn, and the mixing time is 40 minutes; add them into the kneader, and at the same time add polyvinyl alcohol with a mass fraction of 3%...

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Abstract

The invention belongs to the technical field of energy storage materials, and particularly relates to a phase change heat storage material, a phase change heat storage brick and a preparation method thereof. The phase change heat storage material comprises a framework material, a phase change material and a bonding agent, wherein the framework material comprises fine magnesium oxide and magnesia;the framework material, the phase change material and the bonding agents are sequentially subjected to mixing, pressing, primary sintering, grinding, secondary kneading, pressing and secondary sintering to obtain the phase change heat storage brick. The heat storage brick has good heat storage density, heat conduction coefficient and pressure resistant intensity; after the heat circulation test, the heat storage brick cannot generate deformation or cracks; the thermal stability is high; in addition, the preparation method adopted by the invention is easy for industrialized production; the phase change heat storage bricks with different dimensions and shapes can be prepared according to different requirements; the material is widely applied to the field of electric heat storage, particularly to heat storage electric heaters and heat storage electric boilers.

Description

technical field [0001] The invention belongs to the technical field of energy storage materials, and in particular relates to a phase change heat storage material, a phase change heat storage brick and a preparation method thereof. Background technique [0002] At present, my country's air pollution is severe, and a large amount of scattered coal and fuel consumption are one of the main factors of air pollution. Electric energy has the advantages of cleanliness, safety, and convenience. Substituting scattered coal and fuel oil with electric energy is of great significance for promoting the energy consumption revolution, implementing the national resource strategy, and promoting the development of clean energy. In 2016, the Energy Bureau of the National Development and Reform Commission issued the "Guiding Opinions on Promoting Electric Energy Substitution", and clearly stated that it is electric energy to replace scattered coal-fired facilities with various electric heating ...

Claims

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Application Information

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IPC IPC(8): C04B35/04C04B35/622C04B35/634C09K5/06
CPCC04B35/04C04B35/622C04B35/63416C04B2235/3409C04B2235/349C09K5/063
Inventor 张高群杨岑玉徐桂芝邓占锋常亮杜兆龙
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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