[Equest-users] App G Baseline CHW Pump Power

[Bishop, Bill]

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

[cid:image001.jpg at 01CEE9E8.376937D0]



134 South Fitzhugh Street                 Rochester, NY 14608

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

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

From: equest-users-bounces at lists.onebuilding.org<mailto: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<mailto: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<http://www.sudassociates.com>


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20131125/a250623a/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.jpg
Type: image/jpeg
Size: 3248 bytes
Desc: image001.jpg
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20131125/a250623a/attachment.jpg>