Hello everybody,
I am trying to model some natural ventilation in OpenStudio. Currently, I am setting a DSOA of 0.2 changes/hour and then I set up an AirLoop HVAC with Outdoor Air system, couple of fans and a diffuser for each thermal zone. Something that looks like this basically.
image:
The problem I am having is that the Outdoor Air System is mixing the air exiting the thermal zones with the air coming from the external environment. It is already set to "no economizer", yet the mixing happens. Hence my air comes in the system somewhat pre-heated. And it heats some more at each additional fan or diffuser.
I would like instead to have the air from the outside as it is, no mixing, no pre-heating.
I tried to add a Natural Ventilation object in the section Thermal Zones -> Zone Equipment. In this case, the problem I have, is that it seems the Air Loop HVAC is required; like the one in the image above, so it kind of defeats the purpose.
I do not need anything too fancy, I just need to have 0.2 changes/hour of air coming from the outside, and that is it. Is there a better way to do this?
Thank you very much for your help! I am really looking forward to any suggestion you may throw at me :)
Regards, Luca C.
