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Preparation method of gypsum-based paraffin and diatomite phase change energy storage material

A phase change energy storage material and phase change material technology, applied in the field of preparation of gypsum-based paraffin/diatomite phase change energy storage materials, can solve the problem of overcooling, easy separation, and small thermal conductivity of inorganic phase change energy storage materials problem, to achieve the effect of reducing the heat transfer range, easy operation, and high phase change enthalpy

Inactive Publication Date: 2016-06-01
CHINA UNIV OF MINING & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a low preparation cost and a method for preparing a gypsum-based paraffin / diatomite phase-change energy storage material with good application performance, so as to solve the problem of low thermal conductivity of organic phase-change energy storage materials and low thermal conductivity of inorganic phase-change energy storage materials. The problem of the material being too cold and easy to separate

Method used

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  • Preparation method of gypsum-based paraffin and diatomite phase change energy storage material
  • Preparation method of gypsum-based paraffin and diatomite phase change energy storage material
  • Preparation method of gypsum-based paraffin and diatomite phase change energy storage material

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preparation example Construction

[0046] In the preparation method, paraffin is used as the heat storage material, diatomite is used as the supporting material of the paraffin, and the phase change material prepared by embedding the paraffin into the diatomite is added to the gypsum to prepare a gypsum-based paraffin / diatomite phase change storage Energy materials; the specific steps are as follows:

[0047] (1) Diatomaceous earth and paraffin are weighed 20g according to the following ratio respectively; Be respectively: 1# material, 2# material, 3# material and 4# material; Wherein, 1# material is diatomite:paraffin=0.6: 0.4, 2# material is diatomite: paraffin=0.55:0.45, 3# material is diatomite: paraffin=0.5:0.5, 4# material is diatomite: paraffin=0.45:0.55;

[0048] (2) Mix diatomaceous earth and paraffin, grind for 2 hours, and finally get ready in powder state;

[0049] (3) Pour the mixed material that has been ground for 2 hours into a mold, and dry it in a hot air circulation oven at 80°C for 4 hours;...

Embodiment 1

[0066] The paraffin / diatomite phase-change energy storage material is prepared from the following raw materials in weight percentage: Phase-change composite material #1 is diatomite:paraffin=0.6:0.4.

Embodiment 2

[0068] The paraffin / diatomite phase-change energy storage material is prepared from the following raw materials in weight percentage: phase-change composite material #2 is diatomite:paraffin=0.55:0.45.

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Abstract

The invention relates to a preparation method of a gypsum-based paraffin and diatomite phase change energy storage material, and belongs to the preparation method of phase change energy storage materials. The preparation method comprises the steps that 20 g of diatomite and 20 g of paraffin are weighed according to the following proportions that for a first material, the proportion of the diatomite to the paraffin is 0.6 to 0.4, for a second material, the proportion of the diatomite to the paraffin is 0.55 to 0.45, for a third material, the proportion of the diatomite to the paraffin is 0.5 to 0.5, and for a fourth material, the proportion of the diatomite to the paraffin is 0.45 to 0.55; the diatomite and the paraffin are mixed and ground for 2 h, and at last the mixture is in a powder state; the mixture ground for 2 h is poured into a mold, and drying is conducted in a hot wind circulating oven at 80 DEG C for 4 h; the dried material is taken out of the mold, grinding is conducted for 2 h, the paraffin and the diatomite are fully fused, and the prepared composite phase change material is uniform in particle size; the composite phase change material is added into gypsum according to the mixing amounts of 10%, 20% and 30%, and the gypsum-based paraffin and diatomite phase change energy storage material is prepared. The gypsum-based paraffin and diatomite phase change energy storage material is compact in structure and uniform in particle size, the service life is prolonged, the material is used as a building thermal insulation material to adjust the indoor temperature, and the energy sources can be greatly saved.

Description

technical field [0001] The invention relates to a preparation method of a phase-change energy storage material, in particular to a preparation method of a gypsum-based paraffin / diatomite phase-change energy storage material. Background technique [0002] Phase change materials refer to substances that change shape with temperature changes and can provide latent heat, and use their exothermic or endothermic properties during the phase change process to achieve energy release (or storage). The gypsum-based phase-change energy-storage material prepared by combining phase-change energy-storage materials with gypsum can not only maintain the original advantages of fire resistance and light weight of gypsum buildings, but also improve the energy-storage capacity of buildings with the addition of phase-change energy-storage materials. Thermal performance, increase the thermal inertia of the building, reduce the indoor and outdoor heat transfer range of the building, reduce indoor t...

Claims

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Application Information

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IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 刘志勇胡丹吴樊申大珂田美蓉王超玉赵振涛
Owner CHINA UNIV OF MINING & TECH