Research Information System
Proceedings of the 2nd Biennial European Joint Conference on Engineering Systems Design and Analysis. Part 1 (of 8), London, Canada, 4 - 07 July 1994, vol.64, pp.695-701
In industry, day after day, hot and dirty water produced by industrial use has been increasing. Employing this water in classical heat exchanger makes some operating difficulties to appear and causes some energy to be wasted. Improving effectiveness of the heat exchanger is directly connected with the heat transfer coefficients of the hot and cold water sides. In this study, beside improving the heat transfer coefficients of hot water side, in order to transport hot water more easily, inner pipe with helical deformed finning on the outer surface was designed to rotate and to create swirl flow four slots are made at inlet, resulting the heat exchanger has been investigated experimentally. Also swirl flow in rotating pipe is experimentally investigated. The intensity of the swirl is increased by the rotating speed of the pipe, while the dimensions of the slots are kept constant. Due to the swirl effect of slots on the pipe, heat transfer augmentation is observed for rotating pipe. A wide range of Reynolds Numbers (3000