[BLDG-SIM] eQUEST-System no heating

[Aulbach, John]

I am going to take a stab at this one. In eQuest, a VAV system is a
Terminal System. Therefore, in the Wizard, the zone level is where all
heating and/or reheating is done (and developed). You have to force a
primary heating source to occur, but this doesn't appear in the Wizard
mode, apparently..
 
Have you input a Reheat-Delta-T? The temperature of 55 DegF + 40 DegF =
95 DegF heating supply temp.
 
I also do NOT find the ability to create a pre heat coil in the Wizard.
I have done it, but am quite sure this was input in the Detailed
Interface Mode. There are MANY eQuest features that become available
(like more SYSTEM-TYPES) in the Detailed Mode.
 
Once you have "cookie cuttered" your building in the Wizards, switch to
the Detailed Mode. There you will find your preheat coil.

________________________________

From: BLDG-SIM at gard.com [mailto:BLDG-SIM at gard.com] On Behalf Of Zhen
Tian
Sent: Wednesday, August 22, 2007 9:49 AM
To: BLDG-SIM at gard.com
Subject: [BLDG-SIM] eQUEST-System no heating


Dear All,
 
I experienced an issue when I use eQUEST. I model a building in cold
climate with VAV system. In the wizard mode, I found the system heat
source is "not installed". But when I change to electricity, I found the
heating enery use for system heating is zero. I also tried other
options, always found that the system heat source is useless. I found
that all the heating goes the zone level. Based on my understanding,
this should not be the real case.
 
I set the air supply temperature as constant as 55F (around 13 degree
C), zone entering max air tem as 95F. Enen I set the zone entering max
air tem as 86 (30 C). The system heating coil still has no load.
 
Has anyone experience the same problem before and know to to solve this
problem?
 
Thanks a lot.
 
Regards,
 
David

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