Efficiency improvement of heat pipe by using graphene nanofluids with different concentrations

Abstract

In the present study thermal performance of heat pipe were validated experimen-tally. Circular, auxiliary grooved heat pipe were charged with graphene nanoflu-id with different concentrations (0.6%, 0.75%), orientation, and flow rate are fixed as 90° and 100 mL per minute. All the experimental results are validated and compared to base fluid (deionized water). From the experimental results, in-creasing nanofluid concentrations increases thermal performance and decreases thermal resistance. Although the wall temperature of heat pipe higher with gra-phene/water nanofluid than base fluid. Thus, graphene nanoparticles are suitable for heat pipe to increase their performance and capillary action.