Modeling Ceiling fan or circulation fan in Designbuilder or EnergyPlus
Hello,
I am a student doing research on Mixed-mode ventilation (including fan-assisted ventilation). Which tools I am using are DesignBuilder and EnergyPlus.
So, What I make as mixed-mode ventilation is divided into three types of ventilation: 1) Natural ventilation using single-sided window 2) Forced natural ventilation assisted by ceiling fan/circulation fan. 3) Air Handling unit operation and window opening.
There is much research on mixed-mode ventilation related to hybrid ventilation (fan-assisted). But, the authors didn't provide information about ceiling fan (or circulation fan).
The followings are what I am asking:
1) In a single thermal zone, Is it possible to install the fan without dividing room air? What I mean is some people divide a single room into a thin air space with a large hole and the main room. But I don't want to use these kind of modeling methods.
2) Is there any other example of EnergyPlus or Designbuilder about modeling ceiling fan or circulation fan? I found the youtube video that has contents to model ceiling fan in EnergyPlus. But it did only address making Zone:equipment object which does not influence indoor air pressure or velocity.
3) Using a circulation fan can rise the pressure in a single room?
Please help me. Also, If there is a file example and you don't mind sharing, please share the link
Hi Selmar, After reading your post, it is not obvious to me that you have used the existing DesignBuilder help and tutorials on Mixed-mode ventilation. So, I'll link some here for you: https://designbuilder.co.uk/helpv7.0/...
https://www.youtube.com/watch?v=FRuhH...
I think a ceiling fan simply mixes the air in a zone. If you want to study this, I think a CFD tool is needed.
@Greg Estep Thank you for providing me with those links. Actually, I am not using the mixed-mode option in designbuilder. I just needed to air-circulation fan when natural ventilation cannot chill the room even if fenestration surfaces are fully opened. (for assisting natural driving force) Also, I am working on BES + AFN model. Hence, CFD is too precise for my case.
Regards Selma