Enhancement of Heat Transfer Rate of Tube in Tube Helical Coil Heat Exchanger

ABSTRACT This Present work represents an Experimental studies and CFD investigation for a counter flow tube in tube helical coil heat exchanger where hot water flows through the inner tube and cold water flows through the outer tube. An experimental setup is used for the estimation of the heat transfer characteristics. A wire is wound over the inner tube to increase the turbulence in turn increases the heat transfer rate. The analysis deals with the pitch variation of the internal wound wire and its result on the heat transfer rate. From Experimental results, heat transfer rate, LMTD, overall heat transfer coefficient, efficiency and Reynolds number, Nusselt number, Friction factor are calculated.CFD analysis for helical coil tube in tube heat exchanger is carried out and the simulation results are used to predict the flow and thermal development in tube in tube helical coil heat exchanger. Finally, Compare the Experimental and CFD results of tube in tube helical coil heat exchanger with Conventional Heat Exchangers