[Equest-users] EER

Wed Mar 2 15:33:26 PST 2011

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 <http://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 <http://www.kohlerronan.com> 

jhurley at kohlerronan.com <mailto: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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