Nanorefrigerants are one kind of nanofluids. It is the
mixture of nanoparticle with refrigerants. It has better
heat transfer performance than traditional refrigerants.
Recently, some researches have been done about
nanorefrigerants. Most of them are related to thermal
conductivity of these fluids. Viscosity also deserves as
much attention as thermal conductivity. Pumping
power and pressure drop depends on viscosity. In this
paper, the volumetric effects over viscosity of R123-
TiO2 have been theoretically studied. Based on the
analysis it is found that viscosity augmented
accordingly with the increase of nanoparticle volume
concentrations. Extreme percentage of nanoparticle
can create clogging on the refrigeration system.
Therefore, low volume concentrations of
nanorefrigerant are suggested for better performance of
a refrigeration system.