Numerical Simulation And CFD Analysis of Double Tube Heat Exchanger with Different Tube Geometries on Same Cross Section Area

The heat exchanger plays a crucial role in various industries, to decrease the energy consumption rate by increasing heat transfer rate through heat exchanger. In industry, the tube in tube heat exchangers are used as condensers, vaporizers, sub-coolers, heat recovery exchangers, crystallizers etc. Much work has been done on tube with fins, corrugated tube, insertion in tubes baffle arrangement and nano fluid used, but the performance can also be increased by changing the tube geometry, which was designed to increase the performance of the heat exchanger. In this research work, a double tube heat exchanger of circular and elliptical tube is modeled and numerical simulation as well as CFD simulation have been done to enhance the performance of heat exchanger. Analytical result of Circular tube heat Exchanger validate by the CFD results and found that 0.059% variation in temp, which is acceptable. Comparission of CFD simulation done for Double tube heat Exchanger of Circular and Elliptical tube have been done and found that the elliptical tube geometry is better heat transfer than existing circular double tube heat exchanger.