Abstract
Heat transfer enhancement is one of key issues of saving energies and compact designs for mechanical and chemical devices and plants. We discovered an ultrahigh convective heat transfer performance compared to the well-known heat transfer correlations caused by a nano-particle porous layer formed on the heat transfer surface : the maximum increase of heat transfer coefficient was around 180∿220%. We have been developing a new technology to fabricate a nano-porous layer with having the ultrahigh heat transfer characteristics even if any stain adheres to the surface. This paper describes the feature of a new nano-porous layer, the optimal particle size of heat transfer enhancement and the effect of the stain on the heat transfer characteristics.
