STUDY OF TUBE IN TUBE CONCENTRIC PARALLEL FLOW HEAT EXCHANGER USING NANOFLUID.

Heat exchanger finds wide applications in different areas like domestic, industrial, research, military and weapons etc. In some applications like power generation, aerospace it is necessary to attain a high heat transfer. But the conventional fluids such as water limits the heat transfer characteristics of heat exchanger. It was proved many years ago that the suspension of nanoparticles in conventional fluid can increase the thermal conductivity of nanofluid.So the advancement in nanotechnology had made it possible to make a fluid having nanoparticles of metal suspended in a conventional fluid. Thus this fluid is called nanofluid, which have more enhanced heat transfer characteristics than the conventional fluid. The text of this paper deals with the analysis of a parallel flow tube in tube heat exchanger using nanofluid. The nanofluid used is Aluminium Oxide with 5% volume fraction using water as a base fluid. The experiment on set up of tube in tube heat exchanger is performed. The observations are recorded with water as working fluid and then the analysis is carried out for heat transfer coefficient of nanofluid at different volume fraction percentage with the help of ansys.