[Equest-users] App G Baseline CHW Pump Power

[Christian Kaltreider]

Yes, that lays it out pretty clearly.  22 W/GPM system total.  

 

I wonder if future 90.1 versions will prevent gaming of the system (intentional or not) by offering guidance on power allocation among pumps?  

 

Thanks for the helpful replies,

Christian

 

From: Bishop, Bill [mailto:bbishop at pathfinder-ea.com] 
Sent: Monday, November 25, 2013 2:11 PM
To: Joe Fleming; 'Christian Kaltreider'; equest-users at lists.onebuilding.org
Subject: RE: [Equest-users] App G Baseline CHW Pump Power

 

Christian,

 

Confirming what Joe says, an ASHRAE interpretation <https://www.ashrae.org/File%20Library/docLib/StdsInterpretations/IC-90-1-2007-14.pdf>  clarified that 22W/gpm is the total power of all baseline CHW pumps.

 

Regards,

Bill

 

William Bishop, PE, BEMP, BEAP, LEED AP | Pathfinder Engineers & Architects LLP


Senior Energy Engineer




 


134 South Fitzhugh Street                 Rochester, NY 14608


T: (585) 325-6004 Ext. 114            F: (585) 325-6005


 <mailto:wbishop at pathfinder-ea.com> bbishop at pathfinder-ea.com            <http://www.pathfinder-ea.com/> www.pathfinder-ea.com


P   Sustainability – the forest AND the trees. P       

 

From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Joe Fleming
Sent: Monday, November 25, 2013 2:07 PM
To: 'Christian Kaltreider'; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] App G Baseline CHW Pump Power

 

Almost certain that the GBCI interprets it as a whole system divvy, not each pump with 22W/GPM.

 

Regards

 

 

Joe Fleming  |  PE, LEED AP BD+C, BEMP

Commissioning Agent / Energy Modeler | The Spinnaker Group

561.602.3132 | joe at thespinnakergroupinc.com 

 

From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Christian Kaltreider
Sent: Monday, November 25, 2013 2:01 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] App G Baseline CHW Pump Power

 

Hello,

 

In November 2010, around the same time someone was modeling a building that looked like a turkey, there was a conversation on this list about baseline CHW pump power:

 

http://lists.onebuilding.org/htdig.cgi/equest-users-onebuilding.org/2010-November/006941.html

 

Part of the discussion was some back and forth about how to apply G 3.1.3.10.  This section calls for baseline pump power to equal 22W/GPM and for the CHW pumping configuration to be primary/secondary.  Some had the opinion that each pump (primary and secondary loops) should have 22 W/GPM assigned to it, while others thought that the total CHW pump system power should sum to 22 W/GPM, and that it was up to the modeler to divvy up the power among pumps as they see fit.  I did not see a clear conclusion.  

 

Does anyone know if a general consensus was reached?

 

Thanks,

Christian

 

 

Christian Kaltreider, LEED AP | Energy Analyst

Sud Associates, P.A. | T 828.255.4691 | F 828.255.4949 | www.sudassociates.com

 

 

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