Effect of Helical Baffle Inclination Angle on Thermal Characteristic for Shell and Tube Heat Exchanger

Abstract

The shell and tube heat exchanger (STHE) is a critical component in numerous industrial applications, for efficient heat transfer fluids. Traditional designs like straight baffles often face limitations such as flow-induced vibrations, dead zones, and heat transfer efficiency. Helical baffles are characterized by their spiral configuration, which induces a rotational flow of the shell-side fluid. This unique flow pattern enhances heat transfer by increasing turbulence and reducing dead zones, thereby improving overall thermal performance and reducing fouling. CFD analysis is simulate the thermal performance of the helical baffle under various conditions. Geometric model with 9 circular tubes in line arrangement is considered.CAD model is done on solidworks. The CAD model is created using an unstructured Tetra/Hybrid mesh. Using nite volume method, steady row momentum and energy equation are solved. Simulations are carried out Reynolds number 400 and baffle inclination angle 20°, 30°, 40°. Three medium is considered air, oil, water.

The results shows that, shell and tube heat exchanger with helical baffle producing more vortex row and Lower pressure drop compared to segmental baffle. It’s showing heat transfer nearly to segmental baffle.For air and oil it shows the helical baffle 20°,30° is optimum angle and water helical baffle 40° is optimum.