Re: [EnergyPlus_Support] Zone exhaust fan example

[Richard Raustad <RRaustad@xxxxxxxxxxxx>]

The unbalanced air flow warning is just that, a warning to let you know 
the supply and return (and I think exhaust) flows do not match. The 
warning is telling you to add mixing or cross-mixing objects to account 
for the imbalance. You will still get the warnings though. Report the 
supply, return, and exhaust node volumetric flow rates, set up mixing 
objects to account for the imbalance. There is also a known issue with 
HVAC Diagram with that example file. We are working on the solution.

boulder1259 wrote:
>
> I have a five zone building in which outside air enters through the 
> core zone, and then it is
> distributed (via cracks around doors, etc) into the four perimeter 
> zones. I looked through the
> archives and found a thread (Air Flow between Zones, answered Jan 26, 
> 2008) that explained
> how to do this, but I can't get the suggested solution with a zone 
> exhaust fan to work. I
> have two problems:
>
> 1) Unbalanced airflow (In zone 873, there is unbalanced exhaust air 
> flow...)
> 2) The HVAC diagram does not get drawn (Started HVAC Diagram... 
> Ancestor to the following
> box is a splitter: OUTSIDE AIR BALANCING FAN)
>
> I looked at 5ZoneEndUses.idf, and it seems to have errors, too 
> (unbalanced airflow, HVAC
> Diagram errors). Consequently, I don't have a working example that I 
> can use to get my
> simulation running.
>
> I'd appreciate any help you can offer.
>
> Thanks,
> Greg
>
>  

-- 
Richard A. Raustad
Senior Research Engineer
Florida Solar Energy Center
University of Central Florida
1679 Clearlake Road
Cocoa, FL  32922-5703
Phone:   (321) 638-1454
Fax:     (321) 638-1439 or 1010
Visit our web site at: http://www.fsec.ucf.edu

UCF - From Promise to Prominence: Celebrating 40 Years



The primary EnergyPlus web site is found at:
http://www.energyplus.gov

The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/

Attachments are not allowed -- please post any files to the appropriate folder in the Files area of the Support Web Site.

EnergyPlus Documentation is searchable.  Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
 
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/join
    (Yahoo! ID required)

<*> To change settings via email:
    mailto:EnergyPlus_Support-digest@xxxxxxxxxxxxxxx 
    mailto:EnergyPlus_Support-fullfeatured@xxxxxxxxxxxxxxx

<*> To unsubscribe from this group, send an email to:
    EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/