Thermohydraulic Performance Analysis of Tube Heat Exchanger using Dual Side Serrated Insert Tape Having Triangular Wings

Abstract

The thermal performance of heat exchangers can be improved by increasing the rate of heat transfer. Heat transmission and fluid flow characteristics have been improved in this experimental study by adopting a dual-side serrated insert tape with triangular wings. Different geometrical parameters such as wing pitch ratio (P/W), wing width ratio (w/W), wing depth ratio (d/W), serration width ratio (x/W), and perforation index (PI) are considered. The work is performed with various configurations of flow direction such as forward and backward flow with and without alternate axis using various ranges of Reynolds Number (i.e., 10000 ≤ Re ≤ 30000). According to the findings, the forward flow configuration of the insert performs better as compared to the backward flow. But the alternate axis with backward flow configurations and without perforation on the winglet improved thermal performance up to 1.05 times. In the alternate axis with forward flow configuration and with perforation on the winglet, the friction factor is at its lowest value. The Nusselt number and thermal performance factor enhanced up to 1.5 times, and 1.03 as compared to the plain tube.