An Experimental and CFD Analysis on Helical Coil Heat Exchanger with Different Geometry

An attempt is made here to investigate the effect of geometric features especially different geometric shape of coil on single phase flow and convective heat transfer characteristics by experimentally and using CFD technique. An experimentation done on helical, conical and spiral coil. Copper tube of internal diameter 9.5 mm , 1.5 mm thickness and 3000 mm long is used for experimentation. Readings recorded for different mass flow rate(15 LPH,20LPH, 25LPH). Comparative analysis shows that convective heat transfer rate of helical coil tube heat exchanger is 9.54% more than conical and spiral coil heat exchanger. Nusselt number increase as the mass flow rate increase. Helical coil heat exchanger is more efficient than conical and spiral coil heat exchanger. The Computational Fluid Dynamics (CFD) software has been used for simulation of heat exchanger. Experimentation conducted on new heat exchanger for particular mass flow rate and data is maintained as per various flow rate. The experimental results of water outlet temperature are validated with the results obtained by using computational fluid dynamics (CFD) tool and there is a good agreement in between them.