[Equest-users] EER

[Paul Diglio]

Thanks Nick, that is a helpful document.

Paul





________________________________
From: Nick Caton <ncaton at smithboucher.com>
To: Paul Diglio <paul.diglio at sbcglobal.net>; Kelsey VanTassel 
<KVanTassel at sustaineng.com>; James Hurley <JHurley at kohlerronan.com>; 
equest-users at lists.onebuilding.org
Sent: Wed, March 2, 2011 6:33:26 PM
Subject: RE: [Equest-users] EER

 
Good catch Paul!  A lot of my modeling of late has been outside 90.1 so my 
head’s not totally in the game =).
 
Attached is a potentially helpful resource I grabbed from the lists at some 
point that I’ve referenced for breaking EER into cooling EIR / fan energy, if 
you’re modeling under such constraints or otherwise wish to separately model fan 
energy.  

 
There’s more like this to be found in attachments and discussions in the 
archives.
 
I’ve taken zeroing out the fan energy and using listed COP/EER figures for EIR’s 
as an appropriate method for exploring various packaged equipment options, 
acknowledging those figures account for associated fan energies, but Paul’s 
right in that you wouldn’t want to do this for an Appendix G performance 
rating.  

 
~Nick
 
 
NICK CATON, E.I.T.
PROJECT ENGINEER
Smith & Boucher Engineers
25501 west valley parkway
olathe ks 66061
direct 913 344.0036
fax 913 345.0617
www.smithboucher.com
 
From:Paul Diglio [mailto:paul.diglio at sbcglobal.net] 
Sent: Wednesday, March 02, 2011 3:51 PM
To: Nick Caton; Kelsey VanTassel; James Hurley; 
equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] EER
 
James:

If you are modeling to 90.1-2007 Appendix G, then you need to breakout the fan 
energy, so you cannot set it to 0 as suggested.  See G3.1.2.1.

Paul Diglio
 
 

________________________________
 
From:Nick Caton <ncaton at smithboucher.com>
To: Kelsey VanTassel <KVanTassel at sustaineng.com>; James Hurley 
<JHurley at kohlerronan.com>; equest-users at lists.onebuilding.org
Sent: Wed, March 2, 2011 4:39:41 PM
Subject: Re: [Equest-users] EER
James,
Kelsey’s right – in detailed mode such efficiency measures entered in wizard 
mode get split into fan energy (kW/CFM) and heating (EIR/HIR) & cooling (EIR) 
efficiencies.  If entering values for heating/cooling efficiency – pay mind to 
whether fan energy is included in your EER figures (it usually is), and follow 
Kelsey’s advice to zero out the fan energy if so.  

 
If you’re not in detailed yet, heating and cooling efficiencies are handled most 
simply using Wizard Screen 3 of ##:
 
~Nick
 
NICK CATON, E.I.T.
PROJECT ENGINEER
Smith & Boucher Engineers
25501 west valley parkway
olathe ks 66061
direct 913 344.0036
fax 913 345.0617
www.smithboucher.com
 
From:equest-users-bounces at lists.onebuilding.org 
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Kelsey 
VanTassel
Sent: Wednesday, March 02, 2011 3:28 PM
To: James Hurley; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] EER
 
You assign the cooling EIR (inverse of COP) under system>cooling>unitary power. 
Technically, you should define the efficiency of the compressor separately from 
the fan power, otherwise eQUEST will double-count the fan energy. If you use an 
overall system EER, then you should set the fan power (kW/cfm) to zero.
 
Furnace efficiency (heat input ratio) is specified under system>heating>unitary 
power.
 
Kelsey Van Tassel
Mechanical Engineer | kvantassel at sustaineng.com
608.836.4488 ext. 20 | Fax: 608.836.4477
 
Sustainable Engineering Group
901 Deming Way, Suite 201
Madison, WI 53717
www.sustaineng.com
 
 
From:equest-users-bounces at lists.onebuilding.org 
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of James Hurley
Sent: Wednesday, March 02, 2011 3:07 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] EER
 
 
 
Where in eQuest can you assign an EER of a DX coil or the Efficiency of a 
furnace?
 
 
 
 
 
 
 
JAMES HURLEY
Kohler Ronan, LLC | www.kohlerronan.com
jhurley at kohlerronan.com
 
1370 Broadway, New York, NY 10018
212.695.2422  F 212.695.2423
 
301 Main Street, Danbury, CT 06810
203.778.1017  F 203.778.1018
 
Please consider the environment before printing this e-mail.
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