STUDY ON THERMAL CONDUCTIVITY AND HEAT STORAGE CHARACTERISTICS OF COPPER-ALUMINUM-ZINC COMPOSITE METAL OXIDES

Lyu Hongkun; Deng Jiali; Ding Liwei; Hou Chenglong; Xiao Gang; Zhu Peiwang

doi:10.19912/j.0254-0096.tynxb.2023-0769

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (9) : 647-654. DOI: 10.19912/j.0254-0096.tynxb.2023-0769

STUDY ON THERMAL CONDUCTIVITY AND HEAT STORAGE CHARACTERISTICS OF COPPER-ALUMINUM-ZINC COMPOSITE METAL OXIDES

Lyu Hongkun¹, Deng Jiali, Ding Liwei¹, Hou Chenglong¹, Xiao Gang, Zhu Peiwang

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Abstract

Aiming at the low thermal conductivity of copper-aluminum composite metal oxides materials, this article improves the thermal conductivity of copper-based heat storage materials by composite thermal conductivity phase zinc oxide, explores the mechanism of thermal conductivity lifting and the reaction characteristics. The results demonstrate that the solid media continuity of the copper-aluminum-zinc composite metal oxide Cu₉Al₁Zn₃ is improved, leading to a reduction in porosity and a significant 71% increase in thermal conductivity. Moreover, the oxidation-reduction reaction is found to be reversible, with the reduction/oxidation reaction time decreasing from 1.45 min/4.48 min of Cu₉Al₁ to 1.16 min/2.82 min. The cycle performance is stable, the reduction/oxidation reaction rates of Cu₉Al₁Zn₃ remain 98.32%/ 94.26% after 200 high-temperature cycles. Additionally, the heat storage density of Cu₉Al₁Zn₃ can reach 1073.24 kJ/kg. The reduction/oxidation reaction time of Cu₉Al₁Zn₃ module decreases from 30.4 min/24.5 min of Cu₉Al₁ to 20.5 min/22.9 min in the module heat storage test, uniquely accelerating the reaction rate and shortening reaction time, which can effectively respond to thermal storage and release more quickly and provide guidance for subsequent practical applications.

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composite materials / thermochemistry / thermal energy storage / thermal analysis / metal oxide

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Lyu Hongkun, Deng Jiali, Ding Liwei, Hou Chenglong, Xiao Gang, Zhu Peiwang. STUDY ON THERMAL CONDUCTIVITY AND HEAT STORAGE CHARACTERISTICS OF COPPER-ALUMINUM-ZINC COMPOSITE METAL OXIDES[J]. Acta Energiae Solaris Sinica. 2024, 45(9): 647-654 https://doi.org/10.19912/j.0254-0096.tynxb.2023-0769

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