In the present days, the energy consumption has become most important as it is leading towards optimizing thermal devices. The solutions suggested for this purpose is utilization of nano particles to augment the thermal performance of standard fluid (water). This nanofluids are using in most of the engineering applications due to high thermal performance when compared to the standard fluid. The present work is focused on Nanofluid (Graphene oxide dispersed in distilled water) influence towards the increase of heat transfer performance in a concentric tube heat exchanger by conducting experiments under volume flow rate of 0.5lit/min, temperature of 480c by maintaining parallel and counter flow directions. From the results it is noticed that the Graphene oxide Nanofluids has greater possibility in enhancement of heat transfer rates when compared to the standard fluid in a concentric tube heat exchanger