Heat dissipation is the prerequisite in most of the industries like steel manufacturing industry, food processing industry,etc  which involves the use of heat exchangers to thermally process materials, maintain ideal temperatures and can be used to heat or cool a variety of goods. The heat dissipation rate can be increased either by changing the design of the heat exchangers or  by changing the medium / composition of the heat transfer fluid (coolant).The present work focusses on performing structural analysis on inner tube of heat exchanger by using different materials(structural steel,copper and aluminium).Results from structural analysis will be used to perform comparative analysis between different materials which concludes copper as best suited material for inner tube of heat exchanger having thermal conductivity of 385W/m-K and deformation of 8.2e-07.The performance of concentric tube heat exchanger in parallel and counter flow arrangement is experimentally investigated and  optimized by utilizing heat transfer fluids like CuO/Water Nanofluids in place of conventional heat transfer fluids prepared in 0.2% ,0.4%,0.5%,0.8% and 1%  volumetric concentrations. CFD simulations were used to verify the experimental results and heat exchanger’s temperature distributions.. Also the overall heat transfer coefficient increases with increase in particle volume concentration of nanofluid  up to 0.8% and then decreases. The counter flow arrangement of heat exchanger provides optimum performance of heat exchanger with better heat transfer and effectiveness of 49.03% for  0.8% concentration of CuO-water nanofluid than parallel flow arrangement.

Keywords

Concentric tube Heat exchanger, CuO Nanofluid, Heat Transfer Coefficient, Counter flow.