[BLDG-SIM] Heat Pump COP

Fred Porter fporter at archenergy.com
Fri Oct 12 10:23:20 PDT 2007


Yes and no. The energy is "removed," but the COP improves because the fan heat had a COP of 1.0, and is included in the rated gross kW in and Btuh out. I think the T24 ACM may have a "method" or formula.


From: Aulbach, John
Sent: Thu, 10/11/2007 3:25pm
To: BLDG-SIM at gard.com
Subject: [BLDG-SIM] Heat Pump COP


Folks:
 
In eQuest, the Energy Input Ratio (EIR) can be derived from 
EER or COP given for a unit or from a Standard. To correctly model such a unit, 
one must subtract the fan energy for the unit to obtain the EER (EIR) of the 
compressor only. This improves the input from, say, a COP of 12.3 to 
15.
 
What about in the case of the heat pump heating COP? Must 
one subtract out the fan energy here as well, thus "worsening" the COP for the 
heating side?
 
I cannot find anything written on this 
subject.
 
Thanks.
 


John R. Aulbach, PE, CEM
Project Manager
Nexant, 
Inc.
100 North Barranca, Suite 
820
West Covina, CA 91791 USA
Phone: 626-430-9054
Fax: 626-430-9060
email: jaulbach at nexant.com
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