Supply air and extract air in DesignBuilder

answered 2016-02-05 00:25:00 -0500

Dave
1587 ●14 ●4

updated 2016-03-22 01:59:08 -0500

There is a "zone exhaust fan" in DesignBuilder which enables you to do this. More information is in the Help file here: http://www.designbuilder.co.uk/helpv4....

If you want to utilise heat recovery in an air loop you will need to model the system using a return plenum. There is information on using a plenum in the help file, but you essentially replace the return mixer on the air loop with the return plenum and assign your plenum zone (toilets, kitchen, corridor etc). This assumes all flow is back through the plenum object linked to your return air zone, so you don't need to introduce doors and return air grilles etc as you would using the zone exhaust fan.

edit flag offensive delete link

Comments

Hi Dave, Thanks for your answer. I'm already aware of that component on DesignBuilder. But it can't be linked to the main Air Loop. What happens here in Belgium, is that the extracted air returns to the Heat Recovery System located in the AHU. If I do as you said, I would lose free heating energy to the outside environement.

NassimJ ( 2016-02-05 09:54:41 -0500 )edit

Hi Nassim, the answer has been adjusted to take into account your need to use energy recovery.

Dave ( 2016-03-18 13:13:36 -0500 )edit

Hey, Thank you for your answer. I haven't thought about that option ( actually, I didn't know that it does exist). I will try it very soon. Thanks again for your input!

NassimJ ( 2016-03-22 05:06:16 -0500 )edit

Hi Nassim,

I'm facing the same problem (for Belgian Context): extracting in other zones with air transfer... Did you finally get a solution to model this? Thanks for your help!

Olivier

OLI ( 2018-09-19 09:36:53 -0500 )edit

Hi all, I'm getting back on this old post. Is there any solution when the zone where air is extracted is also occupied and heated/cooled? If I assign that zone to the plenum, DB assumes no heating system there...

Thanks for your help!