tailieunhanh - Role of graphene nanofluids on heat transfer enhancement in thermosyphon

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 0C. | Journal of Science Advanced Materials and Devices 4 2019 163e169 Contents lists available at ScienceDirect Journal of Science Advanced Materials and Devices journal homepage locate jsamd Original Article Role of graphene nanofluids on heat transfer enhancement in thermosyphon Sidhartha Das a Asis Giri a Sutanu Samanta a S. Kanagaraj b a Department of Mechanical Engineering North Eastern Regional Institute of Science and Technology Nirjuli Arunachal Pradesh 791109 India b Department of Mechanical Engineering Indian Institute of Technology Guwahati Assam 781039 India a r t i c l e i n f o a b s t r a c t Article history The thermophysical properties of graphene nanofluids in thermosyphon have been studied at different Received 28 October 2018 power inputs temperatures and angles of inclination. The thermal conductivity of the graphene nano- Received in revised form fluid is found to be 29 higher than that of the deionized water at 45 C. The viscosity of the graphene 21 January 2019 nanofluid increased with the concentration of graphene nanoparticles and decreased with increasing the Accepted 22 January 2019 Available online 30 January 2019 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. Keywords Graphene platelet nanoparticle 2019 The Authors. Publishing services by Elsevier . on behalf of Vietnam National University Hanoi. Thermosyphon This is an open access article under the CC BY license http licenses by . Thermal conductivity Viscosity Thermal resistance 1. Introduction involving a thermal load ranging from 40 W to 210 W. They observed a decrease in the thermal resistance of the heat pipe up to Tremendous demands for higher heat transfer devices exist due 65 for vol. of Al2O3 and 57 .