[Equest-users] Dual Duct VAV problems

[John Aulbach]

Bryce:

Forgive my systems ignorance. But if you have a single fan dual duct system, 
don't the hot and cold deck dampers just swing from heating to cooling? How will 
the airflow vary unless you have two fans?

I can learn as well from our well versed members.



John R. Aulbach, PE, CEM
Senior Energy Engineer

________________________________

PartnerEnergy
1990 E. Grand Avenue, El Segundo, CA 90245
W: 888-826-1216, X254| D: 310-765-7295 | F: 310-817-2745
www.ptrenergy.com| jaulbach at ptrenergy.com
 
 



________________________________
From: Bryce Munger <BMunger at glumac.com>
To: equest-users at lists.onebuilding.org
Sent: Tue, February 1, 2011 10:46:02 AM
Subject: [Equest-users] Dual Duct VAV problems


I am working on a dual duct simulation and I am having trouble getting vav 
control to work correctly.  The system is defined as a 100% OA Dual Duct Single 
Fan system and I  have tried everything I can think of to get the fans to vary.  
When the sim runs, the fans are pegged in the 90-100% range all year.  When I 
change to a dual fan dual duct system, the fans will act as a vav fan is 
expected with a range of operating hours throughout the year.  I have tried Fan 
Control of “Variable Speed” and “Fan EIR FPLR”  without success.    Any ideas?
 
Thanks, 
 
Bryce


      
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20110201/7f461a4b/attachment-0001.htm>