CAREER: Microscale Direct Energy Conversion by Field Emission and Microscale Technology in Thermo-Fluids Engineering Education

职业：热流体工程教育中通过场发射和微尺度技术进行微尺度直接能量转换

• 批准号: 9983961
• 负责人: Timothy Fisher
• 金额: $ 28.46万
• 依托单位: Vanderbilt University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-04-01 至 2002-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9983961&HistoricalAwards=false
• 关键词: CAREER; Microscale; Direct; Energy; Conversion

CTS-9983961AbstractThis research program will investigate thermal-electrical energy conversion phenomena in vacuum electron field emission microstructures with synthetic diamond and diamond-like cathodes. An improved thermodynamic performance is expected due to diamond's semiconductor band structure, which produces a selective emission of high-energy electrons, and microstructural features, such as micron-scale pyramidal tips that enhance electrical fields. Guided by new theoretical and computational analyses, new experiments will be conducted to characterize thermodynamic performance for low-temperature refrigeration and high-temperature electrical power generation. In this program, arrays of micron-scale pyramidal diamond tips will be fabricated, and their ability to act as refrigeration and power generation devices will be studied. A working device could include more than ten million tips per square centimeter and could provide new solutions to emerging needs in portable cooling technology and mobile electrical power generation. Further, the efficiency and simplicity promised by this concept could improve large-scale energy systems, such as renewable solar energy converters.

摘要本课题将研究人造金刚石和类金刚石阴极真空电子场发射微结构中的热电能量转换现象。由于金刚石的半导体带结构，可以产生选择性的高能电子发射，以及微观结构特征，例如微米尺度的金字塔尖端可以增强电场，因此有望改善热力学性能。在新的理论和计算分析的指导下，将进行新的实验来表征低温制冷和高温发电的热力学性能。在这个项目中，将制造微米尺度的金字塔形金刚石尖端阵列，并研究它们作为制冷和发电装置的能力。一个工作装置可以包括每平方厘米超过1000万个尖端，并且可以为便携式冷却技术和移动发电的新兴需求提供新的解决方案。此外，这个概念所承诺的效率和简单性可以改善大型能源系统，如可再生太阳能转换器。