[Equest-users] equest refrigerant error

[smartin at shaunmartinconsulting.com]

Hi Phil,

 

Thank you for taking a look at this.  It took me a some hours of fiddling
around but I did manage to get it to run.  I'm not completely sure it had
anything to do with the Refrigerant.  It has again stopped running as I
continue to edit and the message I get now is "12 Bad Building Components"
which is an absolute show-stopper -- eQuest provides no explanation.  When I
did get the model to run, I would get a boatload of "MechEquip_Sim
convergence failure" cautions, again unexplained.  Needless to say, the
refrigeration version of eQuest is challenging.  

 

I started out building off the Grocery model, simplified the refrigeration
entries, and found I had to edit the INP file in a text editor -- the
interface seems to cause lots of problems.  I have to say, though, it's a
shame these refrigeration routines are not built into the core Equest
product.  Very useful.

 

I'm continuing to work on it. Hopefully I can get it running again.  If I
do, and it's stable, I'll share the file.  

 

Shaun

 

Shaun Martin, BEMP, LEED-BD&C

Principal

Shaun Martin Consulting

 <mailto:smartin at shaunmartinconsulting.com>
smartin at shaunmartinconsulting.com

+1-604-789-1095

 

 

 

From: Phil Jordan <phil.jordan at clearesult.com> 
Sent: Friday, November 3, 2023 10:26 AM
To: smartin at shaunmartinconsulting.com
Subject: RE: [Equest-users] equest refrigerant error

 

Hi Shaun,

 

I haven't seen this error before, but a couple thoughts/questions:

 

*	Which version of eQUEST are you using? I just ran a test with
eQUEST-Refrigeration v3.65-7175 with the Grocery example model that is
included and changed the refrigerant from R-507 to R-404A and it simulated
fine for me without that error (model attached).
*	In your model when viewed in eQUEST, did the R-404A data populate
correctly in the Refrigerant Properties window (i.e., does it match your
library entry that you pasted)? Here's what it looks like in the Grocery
model example I mentioned:

*	Does the R-404A data appear in your .inp file in the Refrigerants
section, matching the library entry? It doesn't in the Grocery example that
I used indicating that eQUEST is getting the R-404A data for that model
directly from the library file, but I guess you could hardcode it into your
.inp file from the library entry as a test (though you'd probably have to
correct the formatting first). (See the "R-507" entry in the attached .inp
file for what I'm getting at here.)
*	Are there any additional clues in the .BDL file associated with the
model that is generated when opening the model in eQUEST?

 

Regards,

 

Phil Jordan, PE

 

From: Equest-users <equest-users-bounces at lists.onebuilding.org
<mailto:equest-users-bounces at lists.onebuilding.org> > On Behalf Of
smartin--- via Equest-users
Sent: Thursday, November 2, 2023 12:08 PM
To: equest-users at onebuilding.org <mailto:equest-users at onebuilding.org> 
Subject: [Equest-users] equest refrigerant error

 

EXTERNAL email. Please exercise caution. This e-mail is from a sender
outside of CLEAResult. Do not click any links or open any attachments from
unknown senders or unexpected email.
*************************************************** 

Hi,

 

Anyone know what might cause this? 

***ERROR********************************************************************
***

             Table: R-404A                           has a row that is not

             well behaved and cannot be used to lookup other values

             (not continuously ascending or descending). Row:  1

 

The only reference in my INP file is:

"Cooler Multiplex" = REFG-SYSTEM     

   REFRIGERANT      = "R-404A"

 

Which pulls the library entry  (that I have not touched):

$LIBRARY-ENTRY R-404A                          REFRIGERANT     Refrigerants

.

SATURATED-T

                (-60.000,-54.359,-48.718,-43.077,-37.436,

                -31.795,-26.154,-20.513,-14.872,-9.231,

                -3.590, 2.051,  7.692,  13.333, 18.974,        

and on and on

 

Thanks,

Shaun

 

 

Shaun Martin, BEMP, LEED-BD&C

Principal

Shaun Martin Consulting

smartin at shaunmartinconsulting.com <mailto:smartin at shaunmartinconsulting.com>


+1-604-789-1095

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20231106/35fdcd5c/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.png
Type: image/png
Size: 65788 bytes
Desc: not available
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20231106/35fdcd5c/attachment.png>