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An Investigation of a Tunable Magnetomechanical Thermal Switch

机译:可调式机电热敏开关的研究

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摘要

We propose a new device-level concept for a thermal switch that exploits the temperature dependence of the magnetization of a ferromagnetic material oscillating between a hot and a cold surface. A numerical model is constructed to examine the operation of the thermal switch. The switch turn-on temperature can be readily tuned by adjusting physical parameters of the device, such as the gap between the hot and cold surfaces and the spring constant of the structure supporting the ferromagnet. Experimentally determined oscillation frequencies are consistent with the model predictions. Additionally, it is shown that the thermal contact conductance has a large influence on the device performance. The time-averaged heat flux and effective conductance compare favorably to existing thermal switch technologies over a range of hot surface temperatures.
机译:我们为热开关提出了一种新的设备级概念,该概念利用了在热表面和冷表面之间振荡的铁磁材料的磁化强度的温度依赖性。构建了一个数值模型来检查热敏开关的操作。通过调节设备的物理参数(例如,热表面和冷表面之间的间隙以及支撑铁磁体的结构的弹簧常数),可以轻松地调节开关的接通温度。实验确定的振荡频率与模型预测一致。另外,还表明热接触电导对器件性能有很大的影响。在一定范围的热表面温度下,时间平均热通量和有效电导率比现有的热开关技术优越。

著录项

  • 来源
    《Journal of Heat Transfer》 |2011年第10期|p.101401.1-101401.7|共7页
  • 作者单位

    University of California, Los Angeles, Mechanical and Aerospace Engineering Department, Los Angeles, CA 90095;

    rnUniversity of California, Los Angeles, Mechanical and Aerospace Engineering Department, Los Angeles, CA 90095;

    rnUniversity of California, Los Angeles, Mechanical and Aerospace Engineering Department, Los Angeles, CA 90095;

    rnUniversity of California, Los Angeles, Mechanical and Aerospace Engineering Department, Los Angeles, CA 90095;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    thermal switch; thermomechanical; electronic cooling;

    机译:热敏开关;热机械电子冷却;

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