[Equest-users] Bad building component

[Seaman, Ethan]

Pasha, no problem – thank you for including the screenshot below.  Did you maybe set the flow/capacity to 0.0 cfm/ton, or the coil-BF to 0.0? eQuest could be trying to divide by 0 somewhere which is never good.  I have a feeling the issue is coming from the flow/capacity input (or related inputs that it gets it’s values from).  After it says “convergence failure:1…” it says 1/1/1 which means the failure is on the first hour of the year which is a clue (no auto-sizing can take place if the flow/capacity is zero).

[cid:image002.png at 01D8DDAA.C0EF80D0]


~ ~ ~

P.S. Here is a reference for the VRF system.  This youtube video is by Douglas Maddox who helped to develop the VRF systems for DOE 2.3.

https://www.youtube.com/watch?v=DZlcEXa4tHQ

_______________________________________________
Ethan Seaman
Sustainable Design Analyst
SMMA
t: 617.520.9288
www.smma.com

From: Pasha Korber <pasha.pkconsulting at gmail.com>
Sent: Tuesday, October 11, 2022 6:06 PM
To: Seaman, Ethan <eseaman at smma.com>
Cc: equest-users at onebuilding.org
Subject: Re: [Equest-users] Bad building component

Ethan-  Thank you!  I worked only in eQuest interface to set it up-- buy your reference of the wrong control zone might be likely.  I'm doing a VRF system in DOE 2.3, and I don't have a good step by step reference to make sure I have set it up correctly.  I;ve been able to get through this initial error that I first referenced, but now I have some errors in running the file that I think is specific to the VRF units.  The error I'm able to "see" is a convergence error-  I've never gotten anything like this before, and it appears differently in the SIM file than we are used to seeing.  I am grateful for any insight the rest of you have.

[cid:image001.png at 01D8DDA9.FDAA5640]

On Mon, Oct 10, 2022 at 1:04 PM Seaman, Ethan <eseaman at smma.com<mailto:eseaman at smma.com>> wrote:
Hi Pasha,

A couple things come to mind, but this can be tough to diagnose without knowing the steps you took when adding the HVAC inputs.  Did you only work in the eQuest user interface, or did you work in the .INP file as well?

I just had this one recently and it was coming from a single-zone system that had an incorrect thermal zone specified as it's control zone (incorrect in that the specified control zone was a thermal zone under a different system).

I recommend troubleshooting by opening the file back up with 'pause for errors' selected.  That usually does a good job.

You can also open the .BDL file and search (ctrl+F) "error".

_______________________________________________
Ethan Seaman
Sustainable Design Analyst
SMMA
t: 617.520.9288
www.smma.com<http://www.smma.com>

-----Original Message-----
From: Equest-users <equest-users-bounces at lists.onebuilding.org<mailto:equest-users-bounces at lists.onebuilding.org>> On Behalf Of PKConsulting via Equest-users
Sent: Friday, October 7, 2022 3:25 AM
To: equest-users at onebuilding.org<mailto:equest-users at onebuilding.org>
Subject: [Equest-users] Bad building component

Hi all- I just finished inputting a ton of HVAC systems and trying to run calculations and I’m getting a bad building component error-  but nothing is showing up in the BDL errors and it’s not trying to run so I’m not getting a DOE2 report with an error.

Do you have any ideas on how I can find what is stopping the calcs before they even start?  I’m not sure where to look to find what is causing the error?  I’m not even what to look for in the inp file to find what’s not work.

I’d appreciate any ideas you have to help me push through this error to get it to calculate…

Thanks for your thoughts on this.

Pasha
Ph: 308-763-1593
_______________________________________________
Equest-users mailing list
http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org
To unsubscribe from this mailing list send  a blank message to EQUEST-USERS-UNSUBSCRIBE at ONEBUILDING.ORG<mailto:EQUEST-USERS-UNSUBSCRIBE at ONEBUILDING.ORG>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20221011/aeb15967/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.png
Type: image/png
Size: 24313 bytes
Desc: image001.png
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20221011/aeb15967/attachment.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image002.png
Type: image/png
Size: 61927 bytes
Desc: image002.png
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20221011/aeb15967/attachment-0001.png>