Design and Analysis of a Heat Exchanger with Helical Baffles by using CFD

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
  
© 2017 by IJETT Journal
Volume-48 Number-7
Year of Publication : 2017
Authors : Basawaraj S. Hasu, Dr.G.V.Satynarayana Rao
  10.14445/22315381/IJETT-V48P261

MLA 

Basawaraj S. Hasu, Dr.G.V.Satynarayana Rao "Design and Analysis of a Heat Exchanger with Helical Baffles by using CFD", International Journal of Engineering Trends and Technology (IJETT), V48(7),350-353 June 2017. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group

Abstract
Heat exchangers are used extensively in engineering applications. In present day shell and tube heat exchanger are the most common type heat exchanger widely used used in cars, in planes, in boilers, in ships, in refrigeration systems, in air conditioning systems, in power stations, in oil refineries, in space applications, in renewable energy applications because it suits high pressure applications. The performance of heat exchangers has always been an important part to the lifecycle and operation. Whether developing a new heat exchanger or optimizing the design of an existing one, understanding the coupled fluid flow and heat transfer physics, or the “conjugate heat transfer” process, associated with heat exchanger operation, is essential to provide better cooling performance. The process in solving simulation consists of modeling and meshing the basic geometry of shell and tube heat exchanger using CFD package ANSYS 15.0v.The most important goal of the conjugate heat transfer analysis is to identify the heat transfer characteristics.The objective of the paper is design of shell and tube heat exchanger with helical baffle and study the flow and temperature field inside the shell using ANSYS software tools. The heat exchanger contains 7 tubes and 600 mm length shell and diameter of 90 mm. The helix angle of helical baffle will be varied from 0 to 200mm. In simulation will show how the pressures vary in shell due to different helix angle and flow rate. The flow pattern in the shell side of the heat exchanger with continuous helical baffles was forced to be rotational and helical due to the geometry of the continuous helical baffles, which results in a significant increase in heat transfer coefficient per unit pressure drop in the heat exchanger. Based on these results, design iterations can be easily implemented which can predict the influence of design parameters such as tube diameter, number of loops, loop distribution, etc. Ultimately, an optimal fluid flow.

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Keywords
Heat exchangers, helical baffles, heat exchanger feasibilities.