Evaluation of Heat Transfer Performance of Helical Coil Heat Exchanger

Helical tubes have been widely used in the industry due to their compactness in structure, high heat transfer rate and ease of manufacture. They are commonly found in industry as heat exchangers or chemical reactors. Aside from the industrial application, fluid flow phenomena in coiled duct have also attracted much attention from engineering researchers. So, basically the aim of this project is to investigate the heat transfer performance of various configurations of helical coil heat exchanger such as circular concentric and eccentric tube-in-tube and with different cross sections geometry which are square concentric and eccentric. Moreover, parametric study will also be conducted for several parameters like co-flow in tube, different fluid inlet velocity in inner tubes and annulus region then different in cross-sections geometry for helical heat exchangers by using numerical investigation of well-known ANSYS Fluent CFD software. By commanding boundary conditions and choosing of an applicable mesh, the obtained results were compared and validated with existing experimental results in open literature. The result designates that augments of heat transfer by increasing the inner Dean number, annulus flow rates and concentricity of tube-in-tubes helical heat exchanger. However, the square cross section also can be a part of parameter that going to affect in increasing heat transfer.