通过自组装单层通过相变材料和金属之间的接口促进热能传输
Zi-Yu Shan1,2, Meng An3,4, Xing Zhang1
1Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, People's Republic of China.
概括
通过相变材料 (PCM) 改善热能储存,需要解决低导热问题. 这项研究表明,自组装单层可显著提高PCM和金属添加剂之间的热传递.
科学领域:
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
- 热力学是一种热力学.
背景情况:
- 阶段变换材料 (PCM) 对于可持续的能源储存至关重要,但它们的低导热率阻碍了实际应用.
- PCM和添加剂之间的界面热阻 (ITR) 限制了复合材料中有效的热传输.
研究的目的:
- 为了研究黄金和红醇之间的界面热阻 (ITR),固体-液体相变材料 (PCM).
- 探索使用自组装单层 (SAM) 增强界面热导率 (ITC) 的方法.
主要方法:
- 使用非平衡分子动力学模拟来研究黄金-红醇界面.
- 模拟在各种温度范围内进行,包括低于,接近和高于红醇的点.
- 分析了不同SAM对ITC的影响,重点是界面结合能量.
主要成果:
- 发现固有黄金-红醇ITC对于固体和液体红醇都很低 (<40MW m-2K-1).
- SAMs,特别是那些含有炭基的物质,将ITC增强了7-9的因素.
- 在温度低于点时,ITC显著增加,但在点以上变化很小.
结论:
- 自组装单层有效地促进PCM系统中的界面热传输.
- 接口绑定能量是影响ITC的一个关键因素.
- 这项研究提供了一条改善复合PCM能量存储中的传热效率的途径.
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