铜铝复合金属氧化物储热材料导热系数低,该文通过复合导热相氧化锌提高导热系数,对其导热提升机理和改善后的储热特性进行研究。结果表明：铜铝锌复合金属氧化物Cu9Al1Zn3固体介质连续性提高/孔隙率降低/导热系数提高71%;同时其氧化还原基本可逆,还原/氧化反应时间从Cu9Al1的1.45 min/4.48 min降到1.16 min/2.82 min,循环稳定性高,在200次循环内能够保持98.3%的还原特性和94.2%的氧化特性;成型模块储热试验中Cu9Al1Zn3模块还原/氧化反应时间从Cu9Al1的30.4 min/24.5 min降到20.5 min/22.9 min,反应速率加快,反应时间缩短,能够更快完成储放热响应。
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.
关键词
复合材料 /
热化学 /
热能储存 /
热分析 /
金属氧化物
Key words
composite materials /
thermochemistry /
thermal energy storage /
thermal analysis /
metal oxide
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基金
国网浙江省电力有限公司科技项目“面向新型电力系统的热化学型电热储-放-用技术研究及应用”资助项目（B311DS230006）
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