[Equest-users] Building load profile

Bishop, Bill wbishop at pathfinder-ea.com
Tue Dec 1 09:17:10 PST 2009


James,
 
You can create a new hourly report block that shows demand. Select
"Building HVAC" variable type and "Building elect load (kW)", then
assign the block to the Hourly Report. It will show up in the Hourly
Reports section of the .sim file. You can then press the "Hourly
Results" button in the upper right corner of the SimViewer to get an
Excel spreadsheet and sort the data by the demand column. There is also
an "Electric Generator" variable type as an hourly reports option that
you may want to use.
 
Regards,
Bill
 
 
 
William Bishop, EIT, LEED(r) AP | Pathfinder Engineers & Architects LLP
Mechanical Engineer
 
134 South Fitzhugh Street
Rochester, NY 14608
T: (585) 325-6004 Ext. 114
F: (585) 325-6005
wbishop at pathfinder-ea.com
www.pathfinder-ea.com
P Please strive to live sustainably.
________________________________

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of James
Hansen
Sent: Tuesday, December 01, 2009 10:37 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Building load profile
 
I'm working on a project where we want to figure out how many hours a
year the building demand (KW) falls within given ranges (0-10KW,
10-20KW, 20-30KW, etc).
 
Is there an output report that shows this that I'm just not finding?
 
I set up a natural gas generator, and based on the output of this
generator, I can tell what part load ranges the equipment runs in, and
from this I can get a decent idea.  But in order to breakdown the ranges
into small enough increments (10KW), I end up having to set up multiple
generators with load management schemes, but the numbers just aren't
really making sense.
 
Attached is a jpeg of the current load profile.  I understand that there
is a peak near the 200 KW range - this is where the after-hours loads
settle at, and it is understandable for thousands of hours to be in this
range.  What I don't understand is why there are two peaks at 420 KW and
620 KW, and almost no hours in between.  I think it has something to do
with the generators, and how eQuest calculates the hours within a given
part load range, particularly when the 1st generator is at full load and
the 2nd incremental generator kicks on (I have the loads set to NOT
prorate).
 
I think it would be much more precise to be able to see the KW demand
for the main EM1 meter.  Is that possible?
 
Thanks!
 
GHT Limited
James Hansen, PE, LEED AP
Senior Associate
1010 N. Glebe Rd, Suite 200
Arlington, VA  22201-4749
703-338-5754 (Cell)
703-243-1200 (Office)
703-276-1376 (Fax)
www.ghtltd.com <http://www.ghtltd.com/> 
________________________________

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