[Equest-users] DOE 2.3 Water-side Economizer in Series

Thu Jul 7 12:10:25 PDT 2016

I gave the series chiller configurations a cursory overview a month or
so back when I first saw it in the documentation.  I haven't tried
putting it to practice just yet myself.

A factor that's possibly in play:  I think this is a case where the
engine (doe2.3) is presently a bit ahead of the interface (eQUEST), so
leveraging these series configurations will necessitate manual INP
additions/edits behind what eQuest can currently display & permit to
edit.  Those inputs should stick around, but be mindful some actions in
eQUEST (such as removing & re-creating chillers/loops, or changing
types) could have the effect of stripping the associated inputs in the
INP - so it's something to keep an eye on.  Perhaps reason enough to
push this towards the end of your development timeline.

I don't have the most-current version of 3.65 presently installed, so I
can't easily verify, but I think what you might need to do is to assign
your economizer chiller as "UPSTREAM" in the INP file - note the missing
CHW-SERIES-LOCN keyword present in the other two chillers:

There is some more explicit documentation regarding the new keywords and
inputs somewhere between the new 3.65's documentation and the "what's
new" PDF...  I can't recall immediately but finding and reviewing that
against your INP is the natural next step.

Worth mentioning:  I also am not terribly clear on how well the native
WATER-ECONOMIZER chiller works in the most current version, and whether
it has advanced beyond it's previous operational trappings... you may
want to monitor behavior carefully to be sure it's acting as you'd
expect in any case.  As you might know I'm a proponent of "rolling my
own" waterside economizer chillers with load-management/sequencing for
more operational control... write-ups on procedure are floating about in
the archives ;).

Best of luck, and let us know how this shakes out!

~Nick

Nick Caton, P.E.

  Senior Energy Engineer
  Energy and Sustainability Services
  North America Operations
  Schneider Electric

D  913.564.6361 
M  785.410.3317 
E  nicholas.caton at schneider-electric.com
<mailto:nicholas.caton at schneider-electric.com> 
F  913.564.6380

15200 Santa Fe Trail Drive
Suite 204
Lenexa, KS 66219
United States

From: Equest-users [mailto:equest-users-bounces at lists.onebuilding.org]
On Behalf Of David Griffin II via Equest-users
Sent: Thursday, July 07, 2016 11:50 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] DOE 2.3 Water-side Economizer in Series

I'm working on a model which has two chillers in parallel with a
water-side economizer in series to both of them; i.e. the economizer is
'upstream' and the chillers are 'downstream.'

I know DOE 2.2 will not allow this configuration to be explicitly
modeled, but after some research, it appeared DOE 2.3 would (see page 83
of DOE 2.3 Manual).

When I get things setup (CHW Loop in SERIES, Chillers in DOWNSTREAM) the
keyword to place the economizer UPSTREAM is unavailable, and the run
errors out with "No upstream equipment specified."

I have attached the INP and PD2 file for reference. You may find it
interesting in this model that I have more than one system assigned to a
single zone (Thanks for adding this eQUEST team!).

Am I being overly optimistic about what DOE 2.3 can do, or am I missing
something? Has anyone else tried to model this in DOE 2.3 and been
successful?

Let me know.

Thanks,

ARCH | NEXUS <http://www.archnexus.com> 

DAVID W. GRIFFIN II

BEMP
ENERGY ANALYST

2505 E Parleys Way
Salt Lake City, UT 84109 

Office 801.924.5028 

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

Twitter <https://twitter.com/arch_nexus> Facebook
<https://www.facebook.com/pages/Architectural-Nexus/179588705397563?ref=
ts&fref=ts> Youtube
<https://www.youtube.com/channel/UCYRPWKF-yp-AUiI8ia2XfKw?feature=mhee> 
LinkedIn <https://www.linkedin.com/company/architectural-nexus> 

______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud
service.
______________________________________________________________________

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20160707/c1c4dbc2/attachment-0005.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.png
Type: image/png
Size: 255 bytes
Desc: image001.png
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20160707/c1c4dbc2/attachment-0015.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image002.png
Type: image/png
Size: 7893 bytes
Desc: image002.png
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20160707/c1c4dbc2/attachment-0016.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image004.png
Type: image/png
Size: 35671 bytes
Desc: image004.png
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20160707/c1c4dbc2/attachment-0017.png>