[Equest-users] Primary-secondary loop configuration

Paul Riemer Paul.Riemer at dunhameng.com
Thu Feb 5 13:06:34 PST 2009


Karl,
EQUEST's pump & loop naming is unconventional and confusing.
I think you are have solved it and looking at the water side component tree view with all the +'s expanded should solidify it for you.
Let's just all be thankful that DOE2.2 gives us multiple loops and pump curves.
Paul



From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Karl Stum
Sent: Thursday, February 05, 2009 2:41 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Primary-secondary loop configuration

Chilled water primary-secondary loop configuration.
When using the eQuest Wizard and a primary-secondary chilled water pumping system is set up, I don't see the secondary circulation loop in the tree structure. Furthermore, per the DOE documentation, the chillers would be assigned to the primary loop and the cooling loads assigned to the secondary loop (DOE2 Topics Vol 2, p. 312-313), but the results from the Wizard show in the tree structure everything assigned to the primary loop, as does the output PV-A Plant Design Parameters report. In that report, the chillers do show term called  "(Run-around)" by their evaporators. Is this supposed to be what we would normally call the primary loop? Why aren't there two circulation loops showing up in the tree structure?
Thanks,
Karl
_____________________________________
Karl Stum, PE
Summit Building Engineering
2516 NW 91st Street
Vancouver, WA 98665
v. 360 573 5700
c. 360 771 0918
f.  360 573 5155
http://www.summitbe.com

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