Journal of Thermal Science and Technology (Jun 2020)

Thermal management of automotive SiC-based on-board inverter with 500 W/cm2 in heat flux, and Two-phase immersion cooling by breathing phenomenon spontaneously induced by lotus porous copper jointed onto a grooved heat transfer surface

  • Kazuhisa YUKI,
  • Risako KIBUSHI,
  • Rikako TSUJI,
  • Kio TAKAI,
  • Noriyuki UNNO,
  • Tetsuro OGUSHI,
  • Masaaki MURAKAMI,
  • Tomiyuki NUMATA,
  • Hikaru NOMURA,
  • Takuya IDE

DOI
https://doi.org/10.1299/jtst.2020jtst0012
Journal volume & issue
Vol. 15, no. 1
pp. JTST0012 – JTST0012

Abstract

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In this study, we quantitatively discuss several kinds of thermal resistances that rise up to the surface in thermal management of automotive SiC-based on-board inverters with extremely high heat flux of 500 W/cm2. It is proven that a stacking structure without a heat spreader and a direct cooling method utilizing two-phase immersion cooling technique can provide a breakthrough as the key technology. Furthermore, it is verified that a two-phase immersion cooling technique using “breathing phenomenon” spontaneously induced by a lotus copper jointed onto a grooved heat transfer surface can realize both the above-mentioned stacking structure and extremely high critical heat flux beyond 500 W/cm2 in a saturated pool boiling environment (534 W/cm2 at the maximum).

Keywords