[Bldg-sim] DOE2 peak loads and equipment sizing
Sean Henry
SHenry at glumac.com
Wed Mar 25 10:24:33 PDT 2009
Thanks Jeff, that’s I good point. I appreciate your summary of the differences between those report types.
In my particular case the “major” differences I’ve encountered between LOAD and SYSTEM were much larger than what’s reasonable for ventilation/exhaust/economizer.
Any thoughts?
SP Henry-“the tired troubleshooter”
From: Jeff Haberl [mailto:jhaberl at tamu.edu]
Sent: Tuesday, March 24, 2009 7:36 PM
To: Sean Henry; 'bldg-sim at lists.onebuilding.org'
Subject: Re: [Bldg-sim] DOE2 peak loads and equipment sizing
Whoa!
Hugh differences by design!
LOADS reports are just that...space heating and cooling loads plus assigned electric loads, which includes occupants, schedules, etc. All at constant thermostat temps for each SPACE.
SYSTEM loads are the loads on the air-side systems, which are system dependent, and include ventilation loads, exhaust fans, thermostats, economizers, etc.
PLANT adds yet another layer of equipment, etc.
Therefore, values from SYSTEMS or PLANT are best used for sizing depending on system type.
Jeff
BB 8=! 8=) :=) 8=) ;=) 8=) 8=( 8=) :=') 8=) 8=) 8=? BB
Jeff S. Haberl, Ph.D., P.E., FASHRAE...................jhaberl at esl.tamu.edu
Professor......................................................Office Ph: 979-845-6507
Department of Architecture.......................Lab Ph: 979-845-6065
Energy Systems Laboratory.......................FAX: 979-862-2457
Texas A&M University..............................77843-3581
College Station, Texas, USA.......................URL: www-esl.tamu.edu
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________________________________
From: bldg-sim-bounces at lists.onebuilding.org
To: bldg-sim at lists.onebuilding.org
Sent: Tue Mar 24 18:12:48 2009
Subject: [Bldg-sim] DOE2 peak loads and equipment sizing
Dear Bldg-Sim users,
In DOE2 , have any users come across major differences between building peak cooling loads (in the LS-D reports) and the maximum cooling loads listed in the SS-D reports?
I’m troubleshooting equipment sizing in a DOE2 model and I’m trying nail down some reasonable explanations for the disparities in the loads.
I would appreciate any words of wisdom.
SP Henry
Glumac
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