[BLDG-SIM] External Loads

Zarske, Jim jzarske at nexant.com
Fri Mar 2 09:41:30 PST 2007


In a ideal situation, the model would have a separate input for auxilary
power for ERVs, which some components of eQUEST (e.g., chillers) have
that option.  However, with the ERV, I would perform a hand calc to
include all of the power that the ERV consumes including your pumps and
divide that by the CFM.  There is an input for kW/CFM for ERVs.  This is
the same methodology I've used for Ind/Dir Evap cooling to consider
cooling tower fan and pumping energy.  For systems like these, I think
it's a good idea to calculate the kW/CFM representing the components of
your specific system.  Sometimes, the defaults are not respresentative
of your actual system.
 
Hope that helps,
Jim

________________________________

From: Brandon Nichols [mailto:BrandonN at Hargis.biz] 
Sent: Friday, March 02, 2007 10:24 AM
To: Zarske, Jim; BLDG-SIM at gard.com
Subject: RE: [BLDG-SIM] External Loads


All,
 
How about a parasitic load that are tied to the operation of a system --
in other words loads that don't operate directly on the basis of a
schedule.  Specifically I have heat recovery pumps that need to turn on
only when the ERV is operational, and turn off when it ERV is on
standby, or of course off.
 
 
Thanks
 
Brandon

________________________________

From: BLDG-SIM at gard.com [mailto:BLDG-SIM at gard.com] On Behalf Of Zarske,
Jim
Sent: Thursday, March 01, 2007 10:14 AM
To: BLDG-SIM at gard.com
Subject: [BLDG-SIM] External Loads


Lynn,
 
I'm assuming by external loads that you mean parking lot lighting, for
example?  If so, you would model this as a direct load to the electrical
meter.  This is set up by creating a schedule, double clicking on the
electric meter, entering the energy use, and then applying the schedule.
 
Hope that helps
Jim

________________________________

From: BLDG-SIM at gard.com [mailto:BLDG-SIM at gard.com] On Behalf Of Lynn
Qualmann
Sent: Thursday, March 01, 2007 11:00 AM
To: BLDG-SIM at gard.com
Subject: [BLDG-SIM] External Loads


I need to model external loads in eQuest and see in the tutorial and the
end-use splits that they are accounted for, but I can't seem to find
anything that addresses how they are entered. I'm sure it's obvious to
those who know, but it's a mystery to me. Guidance please?
 
Thanks.
R. Lynn Qualmann, P.E. 
SBW Consulting, Inc. 
2820 Northup Way    #230 
Bellevue,  WA      98004 
Phone:      (425) 827-0330 
Fax:          (425) 822-8119 
e-mail:       rlq at sbwconsulting.com 

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