The research work aims at analyzing the heat transfer rate of the nano particles with different type of heat exchanger. Graphene, the nano particle under consideration, can be prepared using Hummers and Offeman method. The analysis has been done with the help of Ansys Fluent software. The physical properties (density, thermal conductivity, specific heat, viscosity) of the nano particles are taken from a standard journal and analyzed in a double tube and triple tube heat exchanger with the given dimensions. The simulation is done using the Ansys fluent for a particular concentration of...