Hi,
I’m trying to simulate natural ventilation in a double-skin façade, based on this example based on ladybug legacy.
http://hydrashare.github.io/hydra/viewer?owner=chriswmackey&fork=hydra_2&id=Vented_Double-Skin_Facade&slide=1&scale=1&offset=9.223594639690418,-3.958978784738747
I was wondering if there was any way to get setEPNatVent to work with the current version of ladybug? Or is there perhaps any alternatives to this?
I cannot upload any files because I am a new user.
I hope you’re doing well. I wanted to check in and see if you were able to resolve the issue and simulate natural ventilation in a double-skin façade.
Has there been any progress on this, or are there alternative solutions available that you would recommend?
Your guidance would be greatly appreciated.
Thank you for your time and assistance!
Sara Koushan
Jumping in, there is a mix og legacy and updated LBT in the picture, and these are not compatible.
I am also working on double skin facades(DSF) with natural ventilation. I have a problem with setting the natural ventilation for apertures on the DSF. Do you have any information on this?
Thank you for your time.
Best,
Sara
Hi Sarah,
Sorry for the late answer, I am also modelling DSF with HoneyBee and for me it’s working like a charm. For the aperture, you have to set a geometry for windows, input it on the module, and assign to it a window construction in ep_constr. The boolean toggle of operable has to be set on “True” also.
For the natural ventilation, I guess you have input it after on a HB_object. The natural ventilation and the schedule for control are then manage by the module HB window opening on which you can set schedules, fract area opening and discharge coefficient.
Hope it helps ! 
Bests,
Hugo
Thank you for your response. As I mentioned
here
https://discourse.ladybug.tools/t/double-skin-facade/34495?u=sarakoushan
My problem is when I added the natural ventilation component to my model there is no differences between the thermal buffer model and the model which has operable aperture on it. ( my guess is that the interior aperture which suppose to operate are not working)
I am new in honeybee and confused about all the stuff, so I could not find any solution to solve it.
I also attached the picture of my ventilation control component for my DSF.
I seek your help on this issue.
Thank you.
If you toggle the operable part into false, there is no operable aperture, hence, the ventilation control won’t make any difference.
Also, try to see the outdoor temperature of the EPW map you are using, and see if your ventilation control makes sense. For example, you set the minimum outdoor temperature to be 15 for the ventilation to start working. What if during that period the outdoor temperature is 12? Then the ventilation would not operate.
Sometimes I would rather use delta_temp rather than min and max.
As Ricardo said, the toggle is essential, however it seems that you toggle to true for the internal aperture so it looks to be good on that point
The EPW file can be a solution to look t to solve your issue, i also wanted to ask you if you added after the HB Model component, the HB AirflowNetwork one, it is essential to switch in nodal model in order to take into account the natural ventilation
Let us know if it solve your issue
Thx
Edit : I checked your initial post and download your file, and I think it may come from the AirflowNetwork that you have to set up
