Numerical study of the heat transfer performance in a two-phase closed thermosyphon using RGO nano-particles

In present study, a numerical model was developed forsimulation of a thermosyphon with two-phase flow thatincluding phase change heat transfer. The analysis wasfocused basically on the effects of volume concentrations of nanoparticles and the temperature performance on the heat transfer operating of the thermosyphon. This investigationnumerical was performed for deionized water and RGO/Water nanofluid were used as working fluids in the thermosyphon. therefore, four volume concentrations of nanoparticles were selected include ۰.۰ vol.%, ۰.۰۲۵ vol.%, ۰.۰۵ vol.% and ۰.۱ vol.% based on the ۱۷۲.۸۷ heat input.Also investigated effects of thermal resistance, thermal efficiency, effective thermal conductivity and deference temperature of thermosyphon via using nanofluid. Results show that, maximum heat transfer rate of the nanofluid is about ۳۸ % higher than that of water for this case.

Keywords:

Thermosyphon , Nanofluid , heat transfer performance , RGO Nano-particles