The mechanism of enhancement or deterioration for nanofluid flow boiling based on the experimental results

Nanofluid is a potential working fluid for new heat transfer technology. However, the investigation on its ability of flow boiling heat transfer is really scarce. Papers focused on nanolfuid flow boiling is much less than it pool boiling. In addition, the flow boiling heat transfer is enhanced or deteriorated has been extremely controversial for over ten years. In present work, an experimental set up is designed and carried out. Moreover, the flow boiling heat transfer of nanofluid is experimental studied with the consideration of working conditions and nanofluid types. The results indicate that both the enhancement and deterioration of nanofluid flow boiling are discovered. Moreover, the flow boiling heat transfer of nanofluid which is composed of non-metallic compound nanoparticles are deteriorated under most working conditions. What's more important is that it is deteriorated under lower pressure and enhanced under higher pressure for the same kind of nanofluid like SiC/H2O and Graphite/H2O. After all, the phenomena are explained and a mechanism is proposed of nanofluid flow boiling enhancement or deterioration based on the experimental results.