EXPERIMENTAL AND CFD ANALYSIS OF HEAT TRANSFER IN A DOUBLE PIPE HELICAL COIL HEAT EXCHANGER

This study examines the heat transfer process in counter flow of double pipe heat exchanger, experimentally and numerically. The material used for inner tube construction is copper and Polypropylene Random (PPR) for the outer tube (shell). Numerical study was performed with the aid of Solid Works. Water is considered to be the fluid, passing through outer casing and the inner tube. The results reported an efficient cooling to the inner tube, by using helical coil PPR material technique. The heat exchanger under study has been subjected to different cases, including changing the mass flow rate of inner tube and raising shell temperature with constant flow rate for shell and tube. Increasing the shell temperature by 10%, records higher effectiveness of 53%, because of higher number of heat transfer units that are is based on rate of heat capacity for hotter fluid (tube). The numerical simulation using Solid works finds a nice reduction in the hot surface temperature from 351 K to 333 K, due to the occurrence of pressure drop in the helical tubes. The experimental results are compared with the numerical simulation, and 2% error is reported.