CFD ANALYSIS OF DOUBLE PIPE HEAT EXCHANGER
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This document summarizes a CFD analysis of a double pipe heat exchanger. It describes the geometry of the heat exchanger with an inner copper tube and outer aluminum tube. It also discusses the meshing and boundary conditions used in the CFD model. The results show that counter-current flow has a more uniform temperature distribution and higher heat transfer rate compared to parallel flow. The conclusion is that counter-current flow is more effective for heat transfer in a double pipe heat exchanger.
CFD ANALYSIS OF DOUBLE PIPE HEAT EXCHANGER
- 1. CFD ANALYSIS OF DOUBLE PIPE HEAT EXCHANGER S.EZHIL RAJ M.E –THERMAL( R & AC) 1
- 2. CONTENT INTRODUCTION COMPARISION GEOMETRY MESHING RESULT CONCLUSION 2
- 3. INTRODUCTION Heat exchangers are a device that exchange the heat between two fluids of different temperatures that are separated by a solid wall. In a heat exchanger forced convection allows for the transfer of heat of one moving stream to another moving stream. With convection as heat is transferred through the pipe wall and transfers heat. This maintains a temperature gradient between the two fluids. 3
- 4. DOUBLE PIPE HEAT EXCHANGER A double pipe heat exchanger is one of the simplest form of Heat Exchangers. There are two flow configurations: co-current is when the flow of the two streams is in the same direction, counter current is when the flow of the streams is in opposite directions. The major use of these HX is sensible cooling or heating applications 4
- 6. GEOMETRY (a) Inner tube 22 cm OD and 20mm ID of copper tube. (b) Outer tube 42 cm OD and 40 cm ID of aluminium tube. (c) Length of Heat exchanger is 100 cm. (d) Hot and Cold fluid-WATER 6
- 7. GEOMETRY 7
- 11. SETUP MODELS: Energy-ON Viscous k-epsilon model BOUNDARY CONDITIONS : Cold Inlet: Velocity Inlet ( T=283 K & V=0.0001 m/s) Cold outlet: pressure outlet ( T=300 K ) Hot inlet : velocity inlet ( T=350 K & V=0.0003 m/s) Hot outlet: pressure outlet (T=300 K) 11
- 12. 12
- 14. COUNTER FLOW 14
- 17. RESULTS PARALLEL FLOW COUNTER FLOW TEMPERATURE DISTRIBUTION AND MASS FLOW RATE 17
- 18. HEAT TRANSFER Q=m *Cp * ∆Th PARALLEL FLOW COUNTER FLOW Q=.003x4.18x32.01 Q=.003x4.18x33.564 Q=0.4014 KW Q=0.42 KW 18
- 19. CONCLUSION Thus from the CFD-Fluent Analysis we can conclude heat transfer in counter flow is predominant than parallel flow 19