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Fabrication and thermal properties investigation of aluminium based composite phase change material for medium and high temperature thermal energy storage
Solar Energy Materials and Solar Cells ( IF 6.9 ) Pub Date : 2020-07-01 , DOI: 10.1016/j.solmat.2020.110511
Qi Li , Lin Cong , Xusheng Zhang , Bo Dong , Boyang Zou , Zheng Du , Yaxuan Xiong , Chuan Li

Abstract This paper concerns the development of a metal composite containing aluminium as phase change material (PCM) and alumina as structural supporting material (SSM) by the cold compression-hot sintering (CCHS) approach. The microstructural characteristics, thermal and mechanical properties and thermal performance of the proposed composite are characterized. For comparison, a salt composite made of NaLiCO3 as PCM and MgO as SSM with the same melting temperature as the proposed composite is also prepared and investigated. The results indicate that the alumina is wettable with liquid aluminium at elevated temperature, establishing confidence in fabrication of such aluminium composite through CCHS technique. The composite has good chemical compatibility with the melting temperature around 660 °C, and 45% alumina gives the composite optimal formulation at which a thermal conductivity of 3.75 W/m·K, a mechanical strength of 33 MPa and a thermal energy storage density of 400 kJ/kg over temperature range of 500–700 °C can be achieved. The results also indicate that the aluminium composite presents a higher thermal performance than the salt composite. At the same working conditions, the aluminium composite thermal conductivity is over twice as high as that the salt composite while maintaining a similar thermal energy storage density with salt composite.

中文翻译:

中高温蓄热用铝基复合相变材料的制备及热性能研究

摘要 本文涉及通过冷压-热烧结 (CCHS) 方法开发含有铝作为相变材料 (PCM) 和氧化铝作为结构支撑材料 (SSM) 的金属复合材料。表征了所提出的复合材料的微观结构特征、热和机械性能以及热性能。为了比较,还制备和研究了由 NaLiCO3 作为 PCM 和 MgO 作为 SSM 制成的盐复合材料,其熔化温度与所提出的复合材料相同。结果表明氧化铝在高温下可被液态铝润湿,从而建立了通过 CCHS 技术制造这种铝复合材料的信心。该复合材料具有良好的化学相容性,熔化温度在660°C左右,和 45% 氧化铝给出了复合材料的最佳配方,在 500-700 °C 的温度范围内,其导热系数为 3.75 W/m·K,机械强度为 33 MPa,热能储存密度为 400 kJ/kg。达到了。结果还表明,铝复合材料比盐复合材料具有更高的热性能。在相同工况下,铝复合材料的导热系数是盐复合材料的两倍以上,同时保持与盐复合材料相近的蓄热密度。结果还表明,铝复合材料比盐复合材料具有更高的热性能。在相同工况下,铝复合材料的导热系数是盐复合材料的两倍以上,同时保持与盐复合材料相近的蓄热密度。结果还表明,铝复合材料比盐复合材料具有更高的热性能。在相同工况下,铝复合材料的导热系数是盐复合材料的两倍以上,同时保持与盐复合材料相近的蓄热密度。
更新日期:2020-07-01
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