A kind of foam carbon/paraffin phase change composite material and its encapsulation method
A technology of phase-change composite material and carbon foam, which is applied in the field of phase-change energy storage to achieve the effects of controlling thermal expansion, reducing thermal stress and improving heat transfer performance
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Embodiment 1
[0027] Reference figure 1 The foamed carbon / paraffin phase change composite material of this embodiment includes: foamed carbon 1 and paraffin 1 filled in the pores of the foamed carbon 1, and the mass of the foamed carbon 1 is 67g, The mass of the paraffin wax 1 is 95 g; the mass fraction of n-octadecane in the paraffin wax is greater than 98%.
[0028] The physical and chemical parameters of the foamed carbon 1 are: density 0.43g·cm -3 , Porosity 81%, thermal conductivity 133W·m -1 ·K -1 The physical and chemical parameters of the paraffin 1 n-octadecane are: melting point 28.3°C, latent heat 245kJ / kg, thermal conductivity 0.15W·m -1 ·K -1 , Density 814 S g·cm -3 , 775 L g·cm -3 .
[0029] The filling rate of the paraffin wax 1 in the pores of the foamed carbon 1 is 97.3%. It can effectively control the thermal expansion phenomenon after packaging and reduce the thermal stress of the container.
[0030] The method of encapsulating the foamed carbon / paraffin phase change composit...
Embodiment 2
[0038] Embodiment 2. The difference between this embodiment and embodiment 1 is that the mass fraction of n-eicosane in the paraffin wax is greater than 98%; the mass of paraffin wax 2 is 99 g, and the mass of foam carbon 2 is 57 g. The physical and chemical parameters of foamed carbon 2 are: density 0.37g·cm -3 , Porosity 84%, thermal conductivity 110W·m -1 ·K -1 The physical and chemical parameters of the paraffin 1 n-eicosane are: melting point 37°C, latent heat 247kJ / kg, thermal conductivity 0.15W·m -1 ·K -1 , Density 856 S -778 L g.cm -3 , Others are the same as in Example 1. The scanning electron micrograph of the foamed carbon used in this embodiment, such as figure 2 Shown; the scanning electron micrograph of the foamed carbon / paraffin phase change composite material in this embodiment, such as image 3 Shown.
[0039] As those skilled in the art know: high thermal conductivity foamed carbon material is a new type of material that can maintain its own structure and shap...
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