107 ナノ・ミクロ多重多孔質層による伝熱促進に関する共同研究(FM-1 技術移転を目指す熱・燃焼工学最前線,研究発表講演)

概要

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Heat transfer enhancement is one of key issues of saving energies and compact designs for mechanical and chemical devices and plants. We discover a high convective heat transfer performance compared to the well-known heat transfer correlations caused by nano- and micro-scale structure formed on the heat transfer surface: the maximum increase of heat transfer coefficient was around 80%. Moreover, we have done some experiments using a co-current flow heat exchanger. We also obtained high performance compared to the usual correlation. In order to form nano- and micro-scale structure on surfaces, we have developed three treatment methods of Nano-particle Porous Layer method (NPL method), Fine Precipitates method (FP method) and Nano- and Micro-scale Porous Layered Structure method (NMPLS method). We guess by the molecular dynamics simulations that the mechanism of heat transfer enhancement by nano- and micro-scale structure on surface might be an artificial property change in the vicinity of the interface by complex structures of particles and porous from nanometer to sub micrometer scales.
一般社団法人日本機械学会の論文
2005-03-18