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Heat transfer capacity of lotus-type porous copper heat sink.

Author(s) : CHIBA H., OGUSHI T., NAKAJIMA H., et al.

Type of article: Article

Summary

Lotus-type porous copper is a form of copper that includes many straight pores, which are produced by the precipitation of supersaturated gas dissolved in the molten metal during solidification. Lotus-type porous copper is attractive as a heat sink because a higher heat transfer capacity is obtained as the pore diameter decreases. The authors investigated a fin model for predicting the heat transfer capacity of lotus-type porous copper. Its heat transfer capacity was shown to be predictable via the straight fin model, in which heat conduction in the porous metal and the heat transfer to the fluid in the pores are taken into consideration by comparison with a numerical analysis. The authors both experimentally and analytically determine the heat transfer capacities of three types of heat sink: with conventional groove fins, with groove fins that have a smaller fin gap (micro-channels) and with lotus-type porous copper fins. The conventional groove fins have a fin gap of 3 mm and a fin thickness of 1 mm, the micro-channels have a fin gap of 0.5 mm and a fin thickness of 0.5 mm, and the lotus-type porous copper fins have pores with a diameter of 0.3 mm and a porosity of 0.39. Lotus-type porous copper fins were found to have a heat transfer capacity 4 times greater than the conventional groove fins and 1.3 times greater than the micro-channel heat sink under the same pumping power.

Details

  • Original title: Heat transfer capacity of lotus-type porous copper heat sink.
  • Record ID : 2005-1174
  • Languages: English
  • Source: JSME int. J., B - vol. 47 - n. 3
  • Publication date: 2004/08

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