Highly-heat-conductive shaped phase-change heat-storage material and preparation method thereof

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 heat release, high thermal conductivity, and phase-change heat storage. The effect of high enthalpy change

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

AI Technical Summary

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
Effect test

Embodiment Construction

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

[0020] Process the porous copper foam into a cylinder of φ46*1500. Make a mold according to the size of φ46*1500, and put the finished porous copper foam 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 according to 10% mass ratio, stir and absorb for 1 hour, then inject the mixture into the mold, so that the liquid amount of the mixture just submerges the porous copper foam. After cooling and removing the mold, a shaped heat storage material is obtained. Porous copper foam is a material with a porosity of 98%, so the mass fraction of porous copper foam in the mixture accounts for 16.8%, the mass fraction of paraffin wax accounts for 74.88%, and the mass fraction of expanded graphite accounts for 8.32%. The latent heat of phase change of the material is 136kJ / kg, and ...

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PUM

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Abstract

The invention discloses a highly-heat-conductive shaped phase-change heat-storage material and a preparation method thereof. The heat-storage material is prepared from compounding paraffin, expanded graphite and porous foamed copper, wherein the mass percentage of the paraffin accounts for 74.88%; the mass percentage of the expanded graphite accounts for 8.32%; the mass percentage of the porous foamed copper accounts for 16.8%; the melting point of the paraffin selected in the above-mentioned materials is in the range of 40 DEG C to 60 DEG C; and the voidage of the porous foamed copper selected in the above-mentioned materials is more than 98%. The material has the advantages of rapid heat-absorption and heat-release efficiencies, large heat storage capacity, and invariant 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 porous copper foam. 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. [0003] As...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
Inventor 王金平史丽莎赵乐乐
Owner JIANGSU QIZHENG NEW ENERGY
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