Abstract
A new nano- and micro-scale porous layer formed on the wall surface, named "NMPLS: Nano- and Micro-scale Porous Surface," has been developed by combing the chemical etching method combined with nano-particles : "NPL : Nano Porous Layer" method, and the non-electrolyzed plating technique : "FP : Fine Precipitate" method. The ultrahigh convective heat transfer performance compared to the well-known heat transfer correlations is achieved around 60〜80% increase for the basic water experiment and also 40% increase for an air-water co-current coaxial heat exchanger.
