[Bldg-sim] Night Setback Temperatures and Unmet Hours

[Aulbach, John]

Steve:
 
The setback temps are defined in the Cooling and Heating day schedules.
Look down the left side in the Component tree. There should be Heat-Sch
and Cool-Sch. for one or more SYSTEMS.  Open these schedules and they
define the temperature for each hour of a day. The default breakdown is
weekday and weekend, but you can define other days as well (especially
if the building has different seasonal type use). A typical setback
schedule for cooling might be 12Mid-8AM, 85 DegF, 8AM - 6PM, 72 DegF, 6
PM-12 Mid, 85 DegF. You need to input the temperature for the day, hour
by hour.
 
Don't forget the fan. You need to put a 1 (Always ON) from 8 AM - 6 PM,
and a 0 (Zero) for the other hours. The zero says that the fan will not
come on unless the temperature for the space for that hour was
exceeded.. If you set in 85 DegF and a 4 DegF deadband, the temperature
in the space will need to become 87 DegF to warrant the fan coming on.
 
If you input a -1, the fans will NEVER come on for that hour.
 
Hope this helps.

________________________________

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Steve Tobin
Sent: Tuesday, February 26, 2008 1:45 PM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Night Setback Temperatures and Unmet Hours



Hello all,

 

I am working in the detailed edit mode in E-Quest and cannot find where
to define the night setback temperatures.  The wizard mode allows to
define the unoccupied temperature set points but I cannot find that
setting in the detailed edit mode.  

 

The reason I am looking at this is because I am trying to reduce the
number of unmet hours.  I believe the problem to be during the
unoccupied hours because the number on unmet hours did not change if I
dramatically increased the size of the cooling and heating.  I want to
ensure my set points are correct.

Any help would be appreciated.  Thanks,

 

 

 

Steve Tobin

PROJECT ENGINEER

25501 west valley parkway

olathe ks 66061

direct 913 344.0061

fax 913 345.0617

 

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