[Equest-users] Doe 2.3 Error

Thu Oct 27 10:28:00 PDT 2016

I don't have a lot of answers, but took a shallow dive that may be a little insightful:

I thought to look first at your chillers in the INP and something caught my eye by omission:
[cid:image001.png at 01D2304A.4C616490]

With the new, optional, series/parallel arrangement inputs I think we should be seeing something here along those lines for inputs.  Looks like if you don't add anything the default through the interface is to assume everything on the loop is in a parallel configuration.

Look for the large-ish article occurring here in the doe2.3 reference manual (help files) to see what I'm not seeing, if that isn't totally clear:
Volume 2: Dictionary > HVAC Components > CIRCULATION-LOOP > Series vs. Parallel Equipment > Series/Parallel Configuration

I haven't tackled a series + parallel setup yet, but it seems at least implicit that you would need an equip-ctrl defined to land on that particular arrangement.  Also looks like you're missing the "mandatory" DOWNSTREAM-SPLIT input at the loop for parallel/series configuration (as worded by the doe23 reference article).

It wouldn't surprise me, btw, to learn the waterside economizer chiller is a special case to consider with series/parallel inputs... WSE chillers have always been a headache in my experience so I have a procedure to "roll my own" (it's been alluded to/posted here a few times).

Anecdotally:  On my machine after trying to open & simulate with build v7173 & in doe2.3 mode, my simulation seemed to completely hang up and eQUEST was non-responsive here:
[cid:image002.png at 01D2304A.4C616490]

... but then it completed with errors.  On trying to open the SIM via eQUEST I get this:
[cid:image005.png at 01D2304D.11A0C690]

And... haha... you set a new record for the biggest SIM I've ever seen... notepad++ tells me it's too large to even peek inside:
[cid:image006.png at 01D2304D.11A0C690]

All this leads me to consider: it's possible there's something specific to eQUEST getting hung up - you may after reviewing your series/parallel inputs want to try simulating this with doe2.3 command line?

Hope that offers a few new perspectives!

~Nick

[cid:image003.png at 01D2304A.4C616490]
Nick Caton, P.E., BEMP
  Senior Energy Engineer
  Energy and Sustainability Services
  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

[cid:image001.png at 01D189AB.58634A10]

From: Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of David Griffin II via Equest-users
Sent: Thursday, October 27, 2016 1:28 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Doe 2.3 Error

Hi everyone,

I tried to be brave and take on the task of vetting DOE 2.3 - It has come with a few headaches.  I thought I was getting the hang of it until eQUEST started  throwing errors at me. Being less familiar with the DOE 2.3, I'm not finding success trouble shooting the issue either. I have attached the file for everyone's reference.

I tried rebuilding the model from scratch in case the file got corrupted somehow - no luck. That effort pointed me to the CHW loop/equipment, but nothing jumps out at me when I review the inputs. The water-side model tries to take advantage of an 'UPSTREAM' water-side economizer in series with two chiller which operate in parallel. DOE 2.3 is supposed to explicitly model this scenario if I'm correct.

The air-side systems include VAVs w/ reheat for the office spaces, 2-pipe fan coils for the communication rooms, and water cooled CRAC units with humidification for the Labs/Data Center - server by an MAU. The equipment loads for these spaces are considerably higher than what one might see in a typical office building.

I'm curious to see if we can figure out the error as a group. Additionally, I'm always open to learning from my mistakes, so if you see anything unusual in the model that might not be directly related to the issue at hand, I'm open to the criticism.

Thanks in advance!

[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>

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