[Bldg-sim] eQEUST ASHRAE Basecase VAV heating unmet hours

[Aulbach, John]

Try increasing thermostat deadband and insuring they are reverse acting.
You can try 4 DegF or 6 DegF.  The DOE-2 manual suggests this for VAV.
 
John R. Aulbach, PE, CEM
Project Manager
Nexant, Inc.
701 West Kimberly Ave., Suite 245
Placentia, CA 92870-6342 USA
Phone: 714-524-4402
Fax: 714-524-4407
email: jaulbach at nexant.com
 

________________________________

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Zhen Tian
Sent: Friday, June 20, 2008 12:53 PM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] eQEUST ASHRAE Basecase VAV heating unmet hours


Hello, all,

I am simulating a 3-floor, 78000 ft2 office building with eQUEST for
LEED CS. For the ASHRAE basecase (VAV system), there are many zones with
the unmet heating setpoint. The unmet hours around 100-180 which are 50
hours more than than the proposed design case (water-loop heat pump
system). Is there any method that can reduce the unmet hours in the
basecase VAV system? I tried to increase the sizing ratio for heating
and etc., but this does not reduce the unmet heated hours.

Any suggestions?

Thanks.

Regards,

David
	

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