Dear Roshmi,
The DesignBuilder CFD module has nothing to do with energyplus. You ac import boundry conditions from a previously run e+ simulation to the CFD similation.
The windows in energyplus don't let air through them unless you tell them to. If you model with design builder with calculated natural ventilation, you can specify when and how they open and close.
Energyplus even has a way to open and close them based on thermal comfort parameters to simulate human interaction, but that's not implimented in DB. DB does have access to a simulation as per DIN 4108, which runs a EMS that also simulates this interaction, but it fixes some other parameters.
Jean
__._,_.___
On Sat, 27 Jun 2020, 20:24 Roshmi Sen s.roshmi@xxxxxxxxx [EnergyPlus_Support], <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:
Dear EnergyPlus support group,I modelled a low income multi-family housing in Indian warm humid climate as a free running building in designbuilder. I have simulated the room with my windows closed since I was doing a sensitivity analysis of comfort performance of various building envelop combinations and it would be difficult to validate my model with the kind of instruments I was having if windows were open.My current results are giving very low comfort performance with the adaptive comfort equation I am using to assess comfort, even with elevated air speed with use of ceiling fan. My understanding is not clear if energyplus would have reported a different indoor operative temperature had the windows been opened due to the effect of hourly air velocities in the weather file. I did not use the CFD module.If anyone can comment on this that would be really helpful.Thanks and regards,Roshmi
__._,_.___
Posted by: Jean Marais <jeannieboef@xxxxxxxxx>
EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx
The EnergyPlus web site is found at:
http://www.energyplus.net/
The group web site is:
http://groups..yahoo.com/group/EnergyPlus_Support/
Attachments are currently allowed but be mindful that not everyone has a high speed connection. Limit attachments to small files.
EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.