CBECC-Com Issue - HVAC

[GoogleCodeExporter]

Version = 2013_3_653

Category = HVAC

Issue Summary:
List the steps taken to produce the error. For example:
1. Open the attached model file.

2. Run simulation.

3. The attached error message appears during the standard sizing analysis.

Original issue reported on code.google.com by f.le...@gmail.com on 10 Sep 2014 at 12:08

Attachments:

• [2014-09-08 Error.png](https://storage.googleapis.com/google-code-attachments/cbecc/issue-775/comment-0/2014-09-08 Error.png)

[GoogleCodeExporter]

First issue noted:

As indicated in the E+ .err  baseline sizing simulation is failing since the 
zone 'L1 DATA CENTER LCP ZONE' has no surfaces.  Here is the E+ error:

   **  Fatal  ** GetSurfaceData: Errors discovered, program terminates.
   ...Summary of Errors that led to program termination:
   ..... Reference severe error count=1
   ..... Last severe error=GetSurfaceData: Zone has no surfaces, Zone=L1 DATA CENTER LCP ZONE

This statement was not echoed in the CBECC-Com project log file (using 
non-verbose logging), so I recommend we expand the scope of the E+ error file 
messages written to the CBECC-Com log file to include this.  Also recommend 
adding a CHECKSIM rule to Spc that checks to make sure each space has an Int or 
ExtFlr object.  

Also looking into the other issues...

Original comment by da...@360-analytics.com on 12 Sep 2014 at 11:39

• Changed state: Discussion

[GoogleCodeExporter]

Second issue noted: Inconsistent assignment of CoilHtg objects

a) Many of the FPFC systems were missing a Type = 'HotWater' CoilHtg object, 
and 
b) One ZnSys had a Type = 'Resistance' CoilHtg object. 

At minimum, b) was causing a translation failure, but my guess is both will.

I will add a CHECKSIM rule for both of these cases, as the E+ ZoneHVAC object 
for FPFC does not support any other coil types than water, and I think both 
have to be specified, even if one coil has 0 capacity.

Still looking into other issues...

Original comment by da...@360-analytics.com on 13 Sep 2014 at 12:28

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Third issue noted once issues 1) and 2) fixed:
There is bug in my Add/Alt rules resulting in the bz model not being simulated. 
It appears that this would impact any Add/Alt project that has not NEW 
non-water coils.  I've fixed and tested this rule, so will be available in the 
next release.

Original comment by da...@360-analytics.com on 13 Sep 2014 at 1:26

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Fourth issue: This model has 3 zones that reference two different AirSystems.

The zones are:
'L1 3T MRI Suite Zone'
'L1 7T MRI Suite Zone'
'L2 RMR DIVE Equipment Zone'

I had a rule that attempted to check for this, but it needs to be modified to 
work properly.  Will commit this along with other updates.

Original comment by da...@360-analytics.com on 13 Sep 2014 at 1:30

[GoogleCodeExporter]

Fixed the other issues and found that the ap model still fails due to 
temperature convergence issues.  One factor, I believe, is that many zones are 
lacking floors and interior walls connecting zones.

I recommend we add CHECKSIM rules to look for this issue, and continue to test 
this model until it is resolved.

Also, the model has two pumps specified on most FluidSystems.  This doesn't 
appear to cause a translator error, as only one gets simulated.  However, I 
will add a check for this and we should add "Headered Pumps" to the list of dev 
tasks to support this, though if the control is lead/lag, only one pump would 
need to be modeled/simulated.

Original comment by da...@360-analytics.com on 13 Sep 2014 at 1:45

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I will add Checksims to check that weach space has a floor, int or ext. 

Original comment by rhedr...@archenergy.com on 15 Sep 2014 at 3:51

[GoogleCodeExporter]

Closing issue

Original comment by rhedr...@archenergy.com on 24 Feb 2015 at 6:49

• Changed state: DoneVerified