Split Air Conditioner for Room HVAC, ANSYS Fluent CFD Simulation Training
In this project, the movement of the heated airflow inside a room is investigated. The air inside the room is heated using two split coolers and is distributed inside the space with people, using two fans.
This product includes Geometry & Mesh file and a comprehensive Training Movie.
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Split Air Conditioner Project description
In this project, the movement of the heated airflow inside a room is investigated by ANSYS Fluent software. The air inside the room is heated using two split coolers and is distributed inside the space with people, using two fans. Realizable k-epsilon model is exploited to solve turbulent flow equations and the Energy equation is activated to calculate the temperature distribution inside the computational domain. It should be noted that the ideal gas equation is opted to capture the changes of the air density due to temperature change.
Geometry and Mesh
The geometry of this project is designed in ANSYS Design Modeler and consists of two split cooler systems and office apparatus. The present model is meshed in ANSYS Meshing. The mesh type used for this geometry is unstructured and the element number is 547820.
Split Air Conditioner CFD simulation settings
The key assumptions considered in this project are:
- Simulation is done using pressure-based solver.
- The present simulation and its results are considered to be steady and do not change as a function time.
- The effect of gravity is activated and its value is equal to -9.81 m/s2 in Y direction.
The applied settings are summarized in the following table.
|near wall treatment||standard wall function|
|Cell Zone condition|
|Heater 1 & 2||Energy source term||84388.135 W/m3|
|Computer||Energy source term||700 W/m3|
|Lamps||Energy source term||2500 W/m3|
|Bottom, room walls, splitters walls||Heat flux||0 W/m2|
|Computer body||Temperature||310 K|
|Heat transfer coefficient||20 W/m2K|
|Free stream temperature||283 K|
|Wall thickness||0.05 m|
|Heat transfer coefficient||25 W/m2K|
|Free stream temperature||283 K|
|Wall thickness||0.02 m|
|Spatial discretization||Pressure||Second order|
|Density||second order upwind|
|Momentum||second order upwind|
|Energy||second order upwind|
|turbulent kinetic energy||first order upwind|
|turbulent dissipation rate||first order upwind|
|Gauge pressure||0 Pa|
|Velocity (x,y,z)||(0,0,0) m/s|
|turbulent kinetic energy||0 m2/s2|
|turbulent dissipation rate||0 m2/s3|
Contours of pressure, velocity, temperature, etc. are obtained and presented.
As was discussed about the movement of airflow due to the free convection and forced convection, the flow pattern and streamlines can be observed in streamline contour. The hot air will travel upward because of the decreased density (buoyancy effect), in its journey to higher parts of the room, it will again lose its temperature gradually and falls down. This recurring process will causes such flow patterns.
You can obtain Geometry & Mesh file, and a comprehensive Training Movie which presents how to solve the problem and extract all desired results.