Preparation and thermal properties of metal foam/ paraffin composite phase change materials

doi:10.19799/j.cnki.2095-4239.2019.0187

Abstract

Abstract:

Copper foam, nickel foam, and aluminum foam were used as supporting materials, and paraffin was used as the main material. Multiple composite phase change materials were prepared by constant temperature impregnation and pouring methods. Herein, the effects of adsorption temperature and time on the paraffin content of metal foam/paraffin composites and optimal conditions for preparing composite phase change materials by the constant temperature impregnation method are established. Adsorption was conducted at 70 °C for 10 min. The temperature field distribution and thermal conductivity of the multiple composite phase change materials prepared under the optimal condition were tested by the thermal conductivity measurement technology （based on the guarded hot-plate method and infrared imaging technology）. The results indicate that the copper foam/ paraffin composites were the most stable and exhibited the most uniform temperature field distribution during the thermal storage and release process. With a composite thermal storage material released between 35 °C and 50 °C, the shortest duration was revealed by the aluminum foam/ paraffin composite phase change material. The thermal conductivity of composite phase change materials prepared by constant temperature impregnation was 5-9 times higher than that of pure paraffin. The composite materials were prepared by pouring 6-13 times. This study is helpful in promoting the manufacture of metal foam/ paraffin composite phase change materials and provides an experimental basis for conducting future study on the temperature field distribution of the composite phase change materials.

Key words: metal foam, paraffin, composite phase change material, thermal storage and release, thermal conductivity

CLC Number:

TK 02

XU Zhong, HOU Jing, WAN Shuquan, LI Jun, WU Enhui, LIU Qianshu, GAN Xin. Preparation and thermal properties of metal foam/ paraffin composite phase change materials[J]. Energy Storage Science and Technology, 2020, 9(1): 109-116.

Figures/Tables 8

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名称	质量m₁/g	堆体积V₁/cm³	真体积V₂/cm³	假密度ρ₁/g·cm^-3	真密度ρ₂/g·cm^-3	孔隙率/%
泡沫铜	1.2210	3.2989	0.1260	0.3701	9.6905	96.18
泡沫铝	0.8724	3.1479	0.4000	0.2771	2.1810	87.29
泡沫镍	0.9579	2.8526	0.1800	0.3358	5.3217	93.69

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