International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 05 | May -2017
p-ISSN: 2395-0072
www.irjet.net
ANALYSIS OF CONCENTRIC PIPE HEAT EXCHANGER Mr. Deepak Kumar Yadav1, Akash Patel2, Ashwani Gupta3, Ishan Ranjan4, Kaushal Pratap Singh5 1 Assistant
Professor, Mechanical , IMS Engineering College, Ghaziabad, India. Scholars, Mechanical , IMS Engineering College, Ghaziabad, India. ---------------------------------------------------------------------***--------------------------------------------------------------------2345 UG
Abstract: There is a wide application of concentric heat
relatively low cost have been the principal reason for their wide spread use.
exchanger in the field of cryogenics and other industrial applications for its enhanced heat transfer characteristics and compact structure. Lots of researches are going on to improve the heat transfer rate of the concentric pipe heat exchanger. Here, in this work, an analysis has been done for a tube-in-tube concentric heat exchanger with constant heat transfer coefficient. There are various factors present that may affect the heat transfer characteristics of the heat exchanger. Here, the experiment has been done using different fluids. The analysis is done by using ANSYS 15.0 CFD methodology. The graphs have been analysed and discussed to find out the increase in heat transfer for a three-pipe heat exchanger.
1. EXPERIMENTAL SET UP For the modelling, copper is taken as the material for the pipes. It has good working properties compared to the other materials such as Silver, Cast Iron, Aluminium etc. The ANSYS R15.0 product line covers mechanical and shape design, styling, product synthesis, equipment and systems engineering, NC manufacturing, analysis and simulation, and industrial plant design.
1.1 DIMENSIONS OF MODELLING
Keywords— Concentric heat exchangers , ANSYS R15.0, Meshing, Thermal properties.
1.1.1
INTRODUCTION
Diameter of outer pipe =60mm Thickness =2.5mm
A heat exchanger is a device that is used to transfer thermal energy (enthalpy) between two or more fluids, between a solid surface and a fluid, or between solid particulates and a fluid, at different temperatures and in thermal contact. In heat exchangers, there are usually no external heat and work interactions. Typical applications involve heating or cooling of a fluid stream of concern and evaporation or condensation of single- or multicomponent fluid streams. In other applications, the objective may be to recover or reject heat, or sterilize, pasteurize, fractionate, distil, concentrate, crystallize, or control process fluid. In a few heat exchangers, the fluids exchanging heat are in direct contact.
1.1.2
|
Impact Factor value: 5.181
For Three-pipe
Length of the tube = 2000mm Diameter of inner pipe = 20mm Diameter of middle pipe=40mm Diameter of outer pipe=60mm Thickness =2.5mm
2. THERMAL PROPERTIES OF COPPER Table -1: Thermal properties of the solid.
Many industrial processes require simultaneous heat exchange between more than two fluids. There are also possibilities for combining several separate two-fluid heatexchanging operations more economically in a single multifluid arrangement. In this study, the performance of threefluid counter-flow heat exchangers is determined and presented graphically in terms of the temperature effectiveness of two of the fluids referred to the third fluid. The effectiveness is determined as a function of heatexchanger size for sets of fixed operating conditions. Concentric heat exchangers are widely used, and they are manufactured in many Sizes, flow arrangements, and types. They can accommodate a wide range of operating Pressures and temperatures. The ease of manufacturing and their
Š 2017, IRJET
For Two-pipe
Length of the tube = 2000mm Diameter of inner pipe = 20mm
Thermal conductivity
|
400 W m-1 C-1
Density
8933 kg m-3
Specific Heat
385 J kg-1 C-1
ISO 9001:2008 Certified Journal
|
Page 1613