Sheetal ,Shriram

Abstract

This study is consist of the experimental investigation of the heat transfer enhancement along with pressure drop for counter flow heat exchanger consisting perforated twisted tape as insert. The study is conducted for various Reynolds number. The parameters investigated were the hole diameter ratio (d/W = 0.2, 0.4 and 0.6) and depth ratio (w/W = y/w=2.5, 3.5 and 4.5). Twisted tape without perforation is also tested for comparison. Compared to the plain tube, the tubes with TT and PTT heat transfer enhancement up to 168% and 226%, respectively. The evaluation of overall performance under the same pumping power reveal that the PTT with d/W = 0.4 and y/W = 4.5,