基于泡沫铜骨架高导热复合相变储热材料的热性能研究

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Abstract Barium hydroxide octahydrate (Ba(OH)₂·8H₂O) is the phase change material with the highest latent heat of phase change among low temperature phase change materials (0—200 ℃). However, it is limited to developed further in the field of phase change heat storage due to the poor stability and low thermal conductivity. Nano-copper oxide and hydroxyethyl cellulose were added to barium hydroxide octahydrate to prepare modified barium hydroxide octahydrate, and on this basis, the modified barium hydroxide octahydrate was filled into the foamed copper to prepare the foamed copper/modified barium hydroxide octahydrate composite phase change material. It is found that, when 0.2wt% nano-copper oxide and 0.5wt% hydroxyethyl cellulose are added, the thermal performance of modified barium hydroxide octahydrate is the best, with the subcooling degree of 0.5 ℃ and no phase separation phenomenon, and compared with pure barium hydroxide octahydrate ,the latent heat of phase change only decreases by 3.6%. The thermal conductivity of the modified barium hydroxide octahydrate/copper foam composite phase change material is 12.4 W/(m·K), which is 10.3 times as high as the thermal conductivity of pure barium hydroxide octahydrate. The shaped composite phase change material has both great stability and high thermal conductivity.

Key words： phase change material barium hydroxide octahydrate latent heat of phase change thermal conductivity

Published: 05 June 2022 Online: 2022-06-08

CLC number:

TQ026.4

Fund:National Natural Science Foundation of China (51706102).

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	Articles by authors
	LIN Bo
	JU Zihan
	HU Dinghua
	LI Qiang

Cite this article:

LIN Bo,JU Zihan,HU Dinghua, et al. Research on Thermal Performance of High Thermal Conductivity Composite Phase Change Material Based on Foamed Copper Framework Material[J]. Materials Reports, 2022, 36(Z1): 21110168-5.

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http://www.mater-rep.com/EN/ OR http://www.mater-rep.com/EN/Y2022/V36/IZ1/21110168

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