Setting Up HVAC Through-Flow Fan


Through-flow fans exist on offshore facilities to assist with properly ventilating process decks and other regions.


in:Flux has options to add HVAC, forced inlets, forced outlets, and fans. The following example goes over how to define a through-flow fan for your project.


Note that for a through-flow fan to be calculated correctly, no CAD surface can exist behind the fan. The first image below shows how fans have been explicitly defined in the CAD, seen in the below image. The four fans in the middle of the image have had the CAD which represent the "fan" removed using the CAD Creation Tool to ensure an accurate simulation. If this CAD geometry was not removed it would block the flow of the fan and give an inaccurate result. Alternatively, rather than removing the CAD a porous region may be defined over the geometry items making up the fan so that flow can pass through.



How to define a Through-Flow Fan:

  1. Select HVAC or Fans from the Select Item dropdown menu

  2. Choose Through-Flow Fan as the Type

  3. Leave the Name as its auto-generated one

  4. Set the Flow Rate to "2.0 m3/s" or your known/measured value

  5. Ensure that Center and Diameter is selected as the Method. You may also opt to use non-circular inflows for HVACs and fans.

  6. Use the Position and Orientation options as you would for a HP release - using the Pick Tool to select a point then entering a diameter. For this example, a fan is placed on top of a evaporator.



  7. Once positioned and oriented as desired, click the Add Item button.

  8. The fan will be added to the Project Items tab under the HVAC and Fans option:



  9. When defining ventilation cases, click the Advanced options and then select the HVAC: Through-Flow Fan 01 from the HVAC dropdown menu. This will add the fan to the ventilation case an



This process can be repeated for adding several fans to a single simulation: