STUDY ON THERMAL CONDUCTIVITY AND HEAT STORAGE CHARACTERISTICS OF COPPER-ALUMINUM-ZINC COMPOSITE METAL OXIDES
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.
composite materialsthermochemistrythermal energy storagethermal analysismetal oxide
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