[Bldg-sim] DOE2 peak loads and equipment sizing

[Jeff Haberl]

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

BB 8=/ 8=) :=) 8=) ;=) 8=) 8=() 8=) 8=? 8=) 8=) 8= BB

________________________________
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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