Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question

How to model both natural ventilation and HVAC system in the same building on OpenStudio?

asked 2020-04-17 12:17:21 -0600

maizrech's avatar

updated 2020-04-20 08:31:55 -0600


I'm designing a commercial building for LEED v4 that has both natural ventilation and HVAC system on OpenStudio. I know I can use "WindowAndStackOpenArea" to set details for natural ventilation, but I'm not sure how to make the program associate the two systems, so it doesn't consider opened windows and HVAC working at the same time.

edit retag flag offensive close merge delete

1 Answer

Sort by ยป oldest newest most voted

answered 2020-04-18 04:36:43 -0600

Dave's avatar

In DesignBuilder your primary control for preventing simultaneous heating/cooling/venting is via your indoor environmental set point controls i.e. set an appropriate dead band between your heating, cooling and natural ventilation temperature set points. There are additional options to fine-tune the mixed-mode control strategy such as placing limits on outdoor temperatures (too hot or too cold) for natural ventilation or to switch between simultaneous and changeover control types. I presume it works in a similar way in OpenStudio as both use EnergyPlus. There is a free online tutorial on these controls in the "calculated natural ventilation" tutorial on the DesignBuilder website here which might give you a better insight:

edit flag offensive delete link more



I thank you for your answer. I currently know how to do this on DesignBuilder, so I was actually looking for more detailed info for OpenStudio.

maizrech's avatar maizrech  ( 2020-04-20 08:30:05 -0600 )edit

Hi @maizrech, did you figure out how to solve this issue in OS? I'm currently working through the same problem... Any help would be appreciated!

jaw96's avatar jaw96  ( 2020-07-01 08:46:32 -0600 )edit

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Question Tools



Asked: 2020-04-17 09:58:09 -0600

Seen: 1,098 times

Last updated: Apr 20 '20