▎ 摘　　要

The thermophysical properties of graphene nanofluids in thermosyphon have been studied at different power inputs, temperatures and angles of inclination. The thermal conductivity of the graphene nanofluid is found to be 29% higher than that of the deionized water at 45 degrees C. The viscosity of the graphene nanofluid increased with the concentration of graphene nanoparticles and decreased with increasing the temperature. It is observed that the wall temperature distribution of graphene nanofluid is found to be decreased in comparison to that of deionised water. The thermal resistance of thermosyphon is reduced with increasing the power input and irrespective of the inclination angle. (C) 2019 The Authors. Publishing services by Elsevier B.V. on behalf of Vietnam National University, Hanoi.