International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 07 Issue: 01 | Jan 2020
p-ISSN: 2395-0072
www.irjet.net
MULTI TUBE HEAT EXCHANGER IN COUNTER FLOW BY USING CFD ANALYSIS Periyannan.L1, Saravanan.P2, Elayaraja.R3, Subramaniam.D4 1,3Assistant
Professor, Department of Mechanical Engineering, Mahendra Engineering College, Mallasamudram, Tamilnadu, India-637503. 2,4Professor, Department of Mechanical Engineering, Mahendra Engineering College, Mallasamudram, Tamilnadu, India-637503. ----------------------------------------------------------------------***--------------------------------------------------------------------Abstract - Heat exchanger is an important tool that is widely used in different industries such as operation, petroleum refining, chemical, oil, power plant and paper, etc. Energy and material savings considerations as well as environmental challenges in the sector have driven the demand for high performance heat exchangers. To order to improve the performance of the heat exchanger, attention must be given to improving the heat transfer in the heat exchanger. In addition, the increase in heat transfer allows a major reduction in the size of the heat exchanger. A high rate of heat transfer with a minimum space requirement is sufficient for a compact heat exchanger. The counter-flow heat exchanger enhances the heat transfer characteristics of the double pipe heat helical fins mounted on the outer surface of the inner tube and reduces the vibration level by rotating the inner tube. Helical fins increase the heat transfer area and the rotation of the inner tube increases the mixing of fluid particles required for the heat transfer convection mode. The heat pipe model is designed by the CREO PARAMETRIC software and analyzed by the ANSYS software. Key Words: Counter flow, Double pipe, Cooling fins, CERO, Ansys 1. INTRODUCTION A heat exchanger is a device that is used to transfer thermal energy between two or more fluid, between a solid surface and a fluid, or between solid particulates and a fluid, at different temperature and in thermal contact. In heat exchangers, there are usually no external heat and work interactions. Typical application involves heating or cooling of a fluid stream and evaporation or condensation of single or multicomponent fluid streams. In other application, the objective may be to recover or reject heat, or sterilize, pasteurize, fractionate, distil, concentrate, crystallize, or control a process fluid. In a few heat exchangers, the fluids exchanging are in direct contact. In most heat exchanger, heat transfer between fluids takes place through a separating wall or into and out of a wall in a transient manner. In many heat exchangers, the fluid is separated by a heat transfer surface, and ideally they do not mix or leak. Such exchangers are referred to as direct transfer type, or simply recuperate. In contrast, exchangers in which there is intermittent heat exchange between the hot and cold fluid-via thermal energy storage and release through the exchanger surface or matrix are refer to as indirect transfer type, or simply referred to as indirect transfer type, or simply regenerators. Such exchangers usually have fluid leakage from one fluid stream to the other due to pressure differences and matrix rotation/valve switching. Common example of heat exchangers are shell and tube exchangers, automobile, radiators, condensers, evaporators, air pre heaters, and cooling towers. If no phase change occurs in any of the fluids in the exchanger. There could be internal thermal energy sources in the exchangers, such as in electric heaters and nuclear fuel elements. Combustion and chemical reaction may take place within the exchangers, such as in boilers, fired heaters, and fluidizedbed exchangers.
Š 2020, IRJET
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