Highly heat-conducting phase change heat storage material and preparation method therefor

A phase-change heat storage material and heat storage material technology, applied in the field of phase-change heat storage materials, can solve problems such as liquid leakage, poor thermal conductivity, and insufficient solar energy, and achieve fast heat absorption and release, high thermal conductivity, and prevent leaked effect

Inactive Publication Date: 2015-12-16
JIANGSU QIZHENG NEW ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] As a cheap and clean energy source, solar energy has been widely used in production and life. Matching and coordination, resulting in a lot of energy waste
For example, solar energy is excessive during the day, causing solar energy to be wasted in vain, and solar energy is not enough at night and in rainy days
The current heat storage materials generally have the disadvantage of poor thermal conductivity, so the phase change heat storage components made of them cannot fully exert the heat storage function of the heat storage material due to their poor thermal conductivity.
Secondly, when the heat storage material undergoes a solid-liquid phase transition, it will lead to the problem of liquid leakage

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0019] Below with example, the embodiment of the present invention is described further:

[0020] Process the through-hole foamed aluminum into a cylinder of φ46*1500. Make a mold according to the size of φ46*1500, and put the finished through-hole foamed aluminum into the mold. The dry graphite powder is placed in a closed container and heated to 800°C to form expanded graphite. Heat and melt the paraffin, add expanded graphite at a mass ratio of 10%, stir and absorb for 1 hour, then inject the mixture into a mold, so that the liquid amount of the mixture just submerges the through-hole foamed aluminum. After cooling and removing the mold, a shaped heat storage material is obtained. The through-hole foamed aluminum selects a material with a porosity of 90%, so the mass fraction of the through-hole foamed aluminum in the mixture accounts for 25%, the mass fraction of paraffin wax accounts for 67.5%, and the mass fraction of expanded graphite accounts for 7.5%. The latent he...

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PUM

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Abstract

The invention discloses a highly heat-conducting phase change heat storage material and a preparation method therefor. The heat storage material is prepared by compounding 67.5% by mass of paraffin, 7.5% by mass of expanded graphite and 25% by mass of through-hole foamed aluminum. The melting point of selected paraffin in the materials is 40-60 DEG C, and the porosity of the selected through-hole foamed aluminum in the materials is over 90%. The material has the advantages that the material is fast in heat absorption and heat release speed and great in heat storage, and is not varied in shape after phase change.

Description

1. Technical field [0001] The invention relates to the field of phase change heat storage materials, in particular to a heat storage material compounded by paraffin, expanded graphite and through-hole foamed aluminum. 2. Background technology [0002] Energy saving and environmental protection are an important topic in the field of energy utilization. Using phase change latent heat of phase change heat storage materials to store energy is a new type of energy saving technology. During the phase change process, the phase change material absorbs the heat of the surrounding environment, and releases heat to the surrounding environment when the temperature of the surrounding environment decreases, so as to achieve the purpose of controlling the temperature of the surrounding environment and saving energy. It has broad application prospects in solar energy utilization, heat energy recovery, air conditioning and refrigeration, building energy saving, aerospace and other fields. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
Inventor 王金平朱彩云
Owner JIANGSU QIZHENG NEW ENERGY
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