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Double Pipe Counter Flow Heat Exchanger CFD Simulation

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In this project, steady heat transfer process between two water flows in a double pipe counter flow heat exchanger is investigated.

This product includes Mesh file and a Training Movie.

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Description

Double Pipe Counter Flow Heat Exchanger Problem description

In this project, steady heat exchange process between two water flows is investigated. Heat exchangers are widely used in industrial applications where vital need to cool down a fluid as well as moving it, is satisfied by using heat exchangers. Counter flow heat exchangers are simplest form of heat exchangers where exchange of thermal energy between hot and cold flows is done through shared interface between these flows. Hot water flow enters and exits domain with temperatures equal to 370 and 369.67k respectively. Cold water flow enters and exits domain with temperatures equal to 300 and 300.11k respectively. Heat exchange between the flows is equal to 53KW.

Double Pipe Counter Flow Heat Exchanger Geometry and mesh

Geometry of fluid domain is designed in Design Modeler and computational grid is generated using ANSYS Meshing. Mesh type is unstructured and element number is 115635.

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Solver Configuration for CFD Simulation

Critical assumptions:

  • Solver type is assumed Pressure Based.
  • Time formulation is assumed Steady.
  • Gravity effects is neglected.

The following table a summary of the defining steps of the problem and its solution.

Models
Energy On
Viscous K-epsilon model Standard
Near wall treatment standard wall treatment
Materials
Fluid Definition method Fluent Database
Material name Water
Boundary conditions
Inlet hot Type Velocity inlet
Mass flow rate 5 m/s
Temperature 370 K
Inlet hot Type Velocity inlet
Mass flow rate 5 m/s
Temperature 300 K
Solver configurations
Pressure-velocity coupling Scheme SIMPLE
Spatial discretization Gradient Least square cell-based
Pressure Standard
Momentum Second order Upwind
Energy Second order Upwind
K First order Upwind
Epsilon First order Upwind

Results and discussion

Water mass flow rate at inlet is 117.59kg/s and 38.94 kg/s for hot and cold flows respectively. Also, water temperature at inlet and outlet of hot flow is equal to 370K and 369.67K respectively. Finally, water temperature at inlet and outlet of cold flow is equal to 300K and 300.11K respectively. Heat exchange rate is equal to 53KW.

There is a mesh file in this product. By the way, the Training File presents how to solve the problem and extract all desired results.

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