@article{(Open Science Index):https://publications.waset.org/pdf/10003579, title = {Thermophysical and Heat Transfer Performance of Covalent and Noncovalent Functionalized Graphene Nanoplatelet-Based Water Nanofluids in an Annular Heat Exchanger}, author = {Hamed K. Arzani and Ahmad Amiri and Hamid K. Arzani and Salim Newaz Kazi and Ahmad Badarudin}, country = {}, institution = {}, abstract = {The new design of heat exchangers utilizing an annular distributor opens a new gateway for realizing higher energy optimization. To realize this goal, graphene nanoplatelet-based water nanofluids with promising thermophysical properties were synthesized in the presence of covalent and noncovalent functionalization. Thermal conductivity, density, viscosity and specific heat capacity were investigated and employed as a raw data for ANSYS-Fluent to be used in two-phase approach. After validation of obtained results by analytical equations, two special parameters of convective heat transfer coefficient and pressure drop were investigated. The study followed by studying other heat transfer parameters of annular pass in the presence of graphene nanopletelesbased water nanofluids at different weight concentrations, input powers and temperatures. As a result, heat transfer performance and friction loss are predicted for both synthesized nanofluids.}, journal = {International Journal of Materials and Metallurgical Engineering}, volume = {10}, number = {2}, year = {2016}, pages = {193 - 200}, ee = {https://publications.waset.org/pdf/10003579}, url = {https://publications.waset.org/vol/110}, bibsource = {https://publications.waset.org/}, issn = {eISSN: 1307-6892}, publisher = {World Academy of Science, Engineering and Technology}, index = {Open Science Index 110, 2016}, }