Improvement of Heat Transfer Coefficient through Double Pipe Use of Inward and Outward Sinusoidal Ribs for a Double Pipe Heat Exchanger

Abstract

When heat transfer augmentation techniques are required in industrial applications; waste heat recovery plays a crucial role. In many industrial processes and energy systems, efficient heat transfer is essential. This study looks into adding inward and outward sinusoidal ribs to a double-pipe heat exchanger to increase the heat transfer coefficient. On the inner pipe of the heat exchanger, inward and outward sinusoidal ribs are installed to increase the rate and coefficient of heat transfer for counter-flow heat exchangers. With temperatures and velocities of 15°C and 80°C, respectively, and 0.01 m/s and 0.005 m/s, water is used as the working fluid in both the hot and cold fluids in the present experiment. The inner pipe's ribs caused the hot fluid's turbulence, which significantly improved the cooling. In this study, Inward quadruple sinusoidal rib tubes generated the highest heat transfer rates out of all the ribs. The proposed configuration aims to optimize the convective heat transfer characteristics, leading to improved overall heat exchange performance. The double-pipe heat exchanger, a common design in many applications, consists of an inner and outer pipe. The inner pipe is modified with sinusoidal ribs, strategically positioned in both inward and outward orientations. The purpose of these ribs is to create turbulence and improve convective heat transfer between the fluid in the inner pipe and the fluid in the annular space by upsetting the flow patterns.