Design and Thermal Analysis of Double Tube Heat Exchanger with Circular and Hexagonal Tube Geometries on Same Cross Section Area

In many industries Heat Exchangers are used for the purpose of enhancing the heat transfer Co-efficient. It deals with different types of Fluids and also different conditions. This Research studies the heat transfer enhancement technique, to find out the some new technique for enhancement of heat transfer rate. The heat exchanger is an important component in many industries, to lower the energy consumption rate with increased heat transfer rate. 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 hexagonal tube is modeled and numerical simulations as well as CFD simulation have been done to enhance the performance of heat exchanger. Analytical result of hexagonal tube heat Exchanger validate by the CFD results and found that 0.059% variation in temp, which is acceptable. Comparison of CFD simulation done for Double tube heat Exchanger of Circular and hexagonal tube have been done and found that the Hexagonal tube geometry is better heat transfer than existing circular double tube heat exchanger.