Session: Panel-2 Textbooks and Pedagogy in Micro/Nanoscale Heat and Mass Transfer / 05-04 Micro/Nanoscale Thermal Radiation

Paper Number: 130629

130629 - Experimental Study on Near-Field Thermal Radiation Based on Double Helix Wire Parallel Plate Structure With Fixed Gap 

Abstract: 

Improving the efficiency energy utilization is one of the important issues of sustainable energy development. With the rapid development of micro-nano machining technology, electronic components, especially micro devices, have been more and more widely used. However, the problems of heat dissipation and thermal management seriously affect the performance improvement of micro devices. Radiative heat transfer has attracted more and more attention due to its advantages of zero energy consumption and zero emissions. When the radiative heat transfer distance between objects is smaller than the characteristic wavelength of the thermal radiation, due to the near-field photonics tunneling effect of evanescent wave and the action of surface polaritons, and its radiative heat flux is much larger than that of far-field heat radiation. Therefore, near-field thermal radiation at micro-nano scale has important application potential in the heat dissipation of micro-devices.

In the past few decades, researchers have done a lot of studies on near-field thermal radiation for the thermal management, and most of these studies focus on parallel plate configuration which are limited to theoretical studies. Hence, how to construct near-field thermal radiation and measure it effectively in experiments is still the research difficulty in this field. In addition, the experimental system of parallel plate structure with variable gap has very strict requirements on the parallelism of the plat. These experimental designs mainly have poor stability of low thermal conductivity particles and nanotubes, and they are easily damaged. Hence, it is necessary to further optimize and improve the structure and measurement method of the parallel plate with fixed gap near-field thermal radiation.

In this study, a study on near-field heat radiative cooling of a double helix wire parallel plate structure with fixed gap for micro devices is investigated numerically and experimentally. A new physical model of double helix wire electrode on the flat plate structure with fixed gap is presented. The study mainly focuses on the effects of fixed gap and input power on the temperature of double helix wire electrode, and the feasibility and accuracy of the proposed near-field thermal radiation model. As an example, since the near-field thermal radiation between the surfaces of classical media such as silicon and silicon dioxide has been effectively verified, both the silicon dioxide and silicon carbide lower plates with the silicon dioxide upper plate are selected and compared.

The obtained results showed that there is a good agreement between numerical study and experimental study, which indicated that the solution method and obtained results of the proposed near-field thermal radiation model are correct. It is observed for the that the effect of near-field thermal radiation betweenSiO₂ - SiO₂ plats is stronger than that between SiO₂- SiC plates at the same heat transfer gap. The near-field thermal radiative heat transfer can be enhanced obviously at smaller gap less than 200nm. By increasing the heat transfer gap, the effect of the near-field thermal radiation becomes worse. The obtained results can provide a reliable theoretical guidance for the design of the near-field thermal radiation system between parallel plates with fixed gap for micro-devices.

Presenting Author: Chunyang Wang Institute of Engineering Thermophysics, Chinese Academy of Sciences

Presenting Author Biography: Chunyang Wang received his Ph.D. degree in Energy and Environment Systems from the Shizuoka University, Japan in 2020. He has spent two years conducting post-doctoral work at the Institute of Engineering Thermophysics, Chinese Academy of Sciences. Now he is assistant research fellow at the Institute of Engineering Thermophysics, Chinese Academy of Sciences.His primary research focuses on the Heat and mass transfer in porous media, enhancement of heat transfer, solid/liquid phase change energy storage, thermal radiative heat transfer, thermoelectric cooling, etc.

Authors:

Chunyang Wang Institute of Engineering Thermophysics, Chinese Academy of Sciences
Xiao Yang Institute of Engineering Thermophysics, Chinese Academy of Sciences
Yanan Shen Institute of Engineering Thermophysics, Chinese Academy of Sciences
Haibo Zhao Institute of Engineering Thermophysics, Chinese Academy of Sciences
Yang Bai Army Academy of Armored
Haisheng Chen Institute of Engineering Thermophysics, Chinese Academy of Sciences
Ting Zhang Institute of Engineering Thermophysics, Chinese Academy of Sciences
Xinghua Zheng Institute of Engineering Thermophysics, Chinese Academy of Sciences