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设计一种超声辅助真空设备对复合相变储能材料进行熔融混合,并对复合材料的热性能进行分析。首先根据实验要求设计装置腔体,对与腔体相连的真空泵、温度控制器和超声振荡仪进行选型,并将各部分组件连接调试。然后设计对石墨烯纳米片/聚乙二醇(GNPs/PEG)复合材料的实验制备流程和方案,利用差示扫描量热仪对不同振荡频率和GNPs/PEG比率下复合材料的热性能进行分析。通过对超声功率研究的比较结果发现,超声辅助工艺对于GNPs/PEG复合材料的热储能性能可以起到明显改善的作用。
An ultrasonic assisted vacuum equipment was designed to melt-mix the composite phase-change energy storage materials and analyze the thermal properties of the composite materials. First of all, according to the experimental requirements, the device cavity is designed, the vacuum pump connected with the cavity, the temperature controller and the ultrasonic oscillator are selected, and the various components are connected and debugged. Then, the experimental preparation process and scheme of the graphene nanosheet / polyethylene glycol (GNPs / PEG) composites were designed. The thermal properties of the composites at different oscillation frequencies and GNPs / PEG ratios were analyzed by differential scanning calorimeter . Through the comparison of ultrasonic power research, it is found that the ultrasonic assisted process can significantly improve the thermal energy storage performance of GNPs / PEG composites.