Building Peak Cooling Load

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Hello,
Which report shows actual building peak cooling load? Is it the SS-D
report? I am modeling ASHRAE 90.1 2007 system 8 - VAV w/PFP boxes and have
chillers in baseline case. Shall I look at the SS-D report peak cooling
load or PS-C equipment peak cooling load? I am getting different values in
both reports(SS-D = 529.22 tons and PS-C = 642 tons).

*Siddharth*
?

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As a general practice I?d advise referencing the net peak listed for the baseline CHW loop in the PS-D report for determining plant peak cooling load, independent of chiller distribution.

One difference between the numbers is that where SS-D is simply the peak load seen at the HVAC coils, the PS-D figure incorporates heat of CHW pumping & distribution, which is additionally handled at the primary equipment. I?m not sure if that explains the whole gap you?re seeing, but that?d be a part of it.

~Nick
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Nick Caton, P.E., BEMP
Senior Energy Engineer
Regional Energy Engineering Manager
Energy and Sustainability Services
Schneider Electric

D 913.564.6361
M 785.410.3317
F 913.564.6380
E nicholas.caton at schneider-electric.com

15200 Santa Fe Trail Drive
Suite 204
Lenexa, KS 66219
United States

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