[Bldg-sim] Cooling effeciency

[Jay Keazer]

Mike,

I look at PS-C for overall efficiency calcs.  EER = Cooling Load (MBTU) *
1000 / Elec Use (kWH). 


Jay Keazer,  EI
Energy Engineering Team
TME, Inc.
2039 N Green Acres Road
Fayetteville, AR  72703
 
ph   479.521.8634
fax  479.521.1014
jkeazer at tmecorp.com
www.tmecorp.com


-----Original Message-----
From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Tobias, Mike
Sent: Wednesday, July 09, 2008 3:56 PM
To: bldg-sim at lists.onebuilding.org
Subject: Spam:[Bldg-sim] Cooling effeciency

Modeling a 30 story hotel with PTACs (9.54 EER) vs. WSHP (12 EER) I am
expecting to see a large cooling energy reduction.  Since the envelopes
are the same I'm expecting to see the full 26% improvement, however I
only see an 11% improvement in cooling energy comparing the BEPS report.
I would expect part load performance to maintain an almost constant
efficiency spread of 25% through the whole part load curve.  But maybe
for some unkown reason to me the efficiency spread decreases
dramatically through part load?  Also is there any way to check overall
building cooling efficiency like divide overall cooling loads into
energy?  Cooling energy can be found on BEPS, but total building cooling
load varies from LS-F and LS-D to SS-D.
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