Air Conditioning of an Office by Two Fans, ANSYS Fluent CFD Simulation Tutorial
- In this project, we have simulated and examined the performance of fan-driven airflow inside an office for HVAC operation, including a computer and four lamps using ANSYS Fluent software.
- Three-dimensional solar chimney modeling was done using Design Modeler software.
- The meshing of the model has been done using ANSYS Meshing software and the element number is 207707.
- The ideal gas equation is opted to capture the changes in the air density and see the buoyant effect due to temperature change.
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The present study simulated the performance of fan-driven airflow inside an office for HVAC operation, including 1 computer and 4 lamps. The computer is made of plastic and is considered a heat source equivalent to 700 W/m3, while each lamp material is glass and has a heat source equal to 2500 W/m3.
We install two fans on the upper part of two office walls to transfer airflow into the office. We also assumed that the doors and windows of the office have convection heat transfer by ambient air.
The present 3-D model was designed by Design Modeler software. The geometry consists of a cubic space called the office for HVAC operation, composed of several components, including people, lamps, computers, desks, and so on.
An unstructured mesh was performed using ANSYS Meshing software. Meshing has been done more accurately for the internal components of the office. In this mesh, the element number is equal to 547820.
Since, in the present model, the airflow is blown by the fans at a rapid rate, the ideal gas model is used to define the air because the airflow is compressible during the process.
In the compressible flows, the density is not a constant value and varies with pressure and temperature, which is calculated by the relation of the ideal gas law.
The problem goal is to investigate the effect of blown airflow on the components and people in the office. Also, we simulate the influence of airflow on the heat sources applied in the model. The velocity and thermal performance of the 2 fans are easily visible from related contours and vectors.
Every fan has a polynomial porous jump identified in the Fluent software. Also, considering a few heat sources, the HVAC performance of these two fans for this large office seems reasonable.