[Equest-users] Unmet hour problem

Busman, Michael R MBusman at chevron.com
Wed Nov 21 09:34:04 PST 2012


I can’t comment about the cooling unmet hours.  Perhaps, if you attach your .pd2 and .inp files, someone more knowledgeable than I am can find something.

For heating, I’ve found that you need to specify the thermostat as reverse acting so that when the VAV boxes get to the minimum position and the space temperature continues to drop, the boxes will begin to bring on reheat and open the VAV dampers to maintain the setpoint.  You might want to check that.

Wish I had more to offer.

My best,

Mike Busman

Michael R. Busman, CEM
Lead Project Engineer II

Chevron Energy Solutions
A Division of Chevron U.S.A., Inc.
145 S. State College Blvd.
Brea, CA  92821
Direct  714-671-3561
Fax     714-671-3438
eFax   866-420-0335 (Include my Full Name followed by "CAI:MHTZ" on Cover Sheet)
Mobile 310-387-2083
mbusman at chevron.com<mailto:mbusman at chevron.com>

From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Baran Tanriverdi
Sent: Wednesday, November 21, 2012 7:57 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Unmet hour problem

Dear all;

i modeled  packaged var vol  as a mechanical system. i can't satisfy the temperature set points for nearly for all design hours both for heating and cooling. (unmet hours)
i checked;
*zone temperatures
*throtling range
*coil capacities
*suppy air flow

i could'nt handle the issue.

Many Thanks.
Baran Tanrıverdi

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