Experimental studies on heat transfer augmenatation using galvanised iron wire insert with and without baffles

Abstract

The present project work on “Experimental Studies on Heat Transfer Augmentation Using Galvanised Iron Wire Insert With and Without Baffles” was undertaken with a view to increase the effective thermal performance of heat exchangers. Every commercial, industrial and domestic application, where conversion or utilization of energy is involved, requires a heat exchange process. In the present project work, the effect of addition of GI wire insert with and without baffles, in the flow path of liquid was investigated. This project deals with the using four Twisted Galvanised Iron (GI) wires with and without baffles, as passive augmentation device. By introduction of these inserts in the flow path of liquid in the inner tube of the heat exchanger the effect of turbulence on Nusselt number was observed. It was compared with the values for smooth tube. The effect of baffles made of tin was also taken into account and a comparative study was made on the basis of varying baffle space. All the results and readings were compared with the standard data from the smooth tube. The Nusselt number was found to increase with decreasing baffle space. The 4 wire insert with baffle space 6cm was found to be the most efficient among all the configurations used.