CFD Analysis of Double Pipe Counter Flow Heat Exchanger

CFD Analysis of Double Pipe Counter Flow Heat Exchanger

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Dhrubajyoti Bhattacherjee

Department of Mechanical Engineering,

Swami Vivekananda Institute of Science & Technology.

Abstract:-The design of a double pipe in tube heat exchanger has been facing a problems because of the lack of experimental data available regarding the behaviour of fluid flow in double pipe & also in case of heat transfer data, which is not in the case in shell & tube heat exchanger. So,to the best of our effort double pipe heat exchanger by varying the different parameters like different temperatures & diameters of pipe & coil & also to determine the fluid flow pattern in a double pipe heat exchanger. The objective of this project is to obtain a better & more quantitative insight into the heat transfer process that occurs when a fluid flows. The study also covered the different types of fluid flow range extending from laminar flow through the transition to the turbulent flow. The materials for the study were decided, fluid taken was water and the material for the pipe was taken to be steel for its better conducting properties.

Index term:-Double pipe Heat Exchanger, CFD Analysis, Solution, Results & Discussion, Conclusion, Report.

1.INTRODUCTION:-

Heat Exchange between flowing fluids is one of the most important physical process of concern, and a variety of heat exchangers are used in different types of installation, as in process industries, power plants ,food processing, refrigeration, etc. The purpose of constructing a heat exchanger is to get an efficient method of heat transfer from one fluid to another, by direct contact or by indirect contact. The heat transfer occurs by three principles: conduction, convection, or radiation. In a heat exchanger the heat transfer through the radiation is not taken into the account as it is negligible in comparison to conduction and convection. Conduction takes place when the heat from the higher temperature fluid flows through the surrounding solid wall. The conductive heat transfer can be maximized by selecting a minimum thickness of wall of a highly conductive material. But convection plays an important role in the performance of a heat exchanger.

Forced convection in a heat exchanger transfer t heat from one moving stream to another stream through the wall of the pipe. The cooler fluid removes heat from he hotter fluid as it flows along or cross it. Different co-relation are used for the calculation for the Nusselt no. and the heat transfer coefficient.

1.1.Double Pipe Heat Exchanger:-1.2.Heat Transfer Co-efficient:-1.3 Advantages of double pipe heat exchanger:-1.4 Disadvantages of double pipe heat exchanger:-1.5. Double pipe heat exchanger applications:-3.1 Computational Fluid Dynamics and Fluent:-3.2 Basic Principle That Govern The Implementation of CFD:-3.3.Major Key findings and gap analysis:-4.1.Geometry:-4.1.1.sketching:-4.2.Mesh:-4.2.1. y+ Values:-4.2.2. Named Selection:-4.3. Solution:-4.3.2. Models:-4.3.3. Materials:-4.3.4. Cell zone conditions:-4.3.5. Boundary Conditions:-4.3.6. Reference Value:-4.3.7. Solution Methods:-4.3.8. Solution Control and Initialization:-4.3.9. Measure of Convergence:-4.3.10. Run Calculation:-5.1.Contours:-5.2. X-Y plots:-XY-PLOT OF TOTAL PRESSURE:XY-PLOT OF VELOCITY:

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