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Condenser Water Pump #307

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
Describe the translation issue or enhancement:
We are revising the rules for the baseline sizing and baseline models such that 
condenser water pumps are assigned as children HtRej objects (cooling towers).  
"Base CW Pump" appears in the bz.xml file, but EnergyPlus throws an error that 
the BaseCWSystem has no pump.

I have not yet committed the rule changes that create the pump as described.  I 
am attaching the bz.xml file that the modified rules created.

Original issue reported on code.google.com by rhedr...@archenergy.com on 1 Oct 2013 at 11:29

Attachments:

GoogleCodeExporter commented 9 years ago 
Roger, 
I now recall the reason why the rules reflected the VSD pumps as children of 
the return FluidSeg, not the chiller/boiler.  IF you import this model into OS 
via the last package Kyle distributed, you'll see a warning logged:

Warning: Variable speed branch pumps are unsupported

Sorry that this did not immediately come to my memory last we talked, and I did 
not follow-up with Kyle to confirm why this was not supported, even though the 
OSM reflects Pump:VariableSpeed on the ChW loop.  Perhaps this warning is no 
longer valid, or only pertinent to CW loops.  

Kyle, can you confirm:
1) status of simulating VariableSpeed branch pumps
2) status of translating branch pumps in general for CW systems?  

Basically, we are looking for the representation shown in the attached picture. 
 I know I did not give you an example of this in our last round of hydronic 
piping updates, but we are trying to follow the latest ACM rules of one CW pump 
per chiller.  I didn't think this would work since it violates the rule of a 
Pump being first object defined on PlantLoop. 

Since there is 1:1 count of Chlr:HtRej objects, the second option of having a 
pump on the CT branch might work. This is what Roger's SDD XML file describes.

Finally, Roger, was it intentional for HtRej:Pump:SpdCtrl = VariableSpeed?

Original comment by da...@360-analytics.com on 2 Oct 2013 at 12:01

Attachments:

GoogleCodeExporter commented 9 years ago 
Variable speed is what I put in the rule, but I just checked the ACM and the CW 
pumps should be constant speed.  I'll revise the rules.  Let me know if this is 
a problem for the translation, and I can provide a revised xml file.

Original comment by rhedr...@archenergy.com on 2 Oct 2013 at 12:06

GoogleCodeExporter commented 9 years ago 
Kyle, I'm still not getting a condenser water pump.  Is this not yet fixed?

Original comment by rhedr...@archenergy.com on 16 Oct 2013 at 10:15

GoogleCodeExporter commented 9 years ago 
Roger, the 401 instances currently in the subversion repository do not appear 
to have pumps as children of the <HtRej> tag.  I could use an example file 
after all.

Original comment by kbe...@gmail.com on 18 Oct 2013 at 4:49

GoogleCodeExporter commented 9 years ago 
I just committed updated xml files for 401.  The bz.xml has the proper pump 
configuration.  b.xml may not be any good because the bz run errored out.

Original comment by rhedr...@archenergy.com on 18 Oct 2013 at 4:57

GoogleCodeExporter commented 9 years ago 
Thanks.  I just made required changes and will use that as a test.

Original comment by kbe...@gmail.com on 18 Oct 2013 at 5:15

GoogleCodeExporter commented 9 years ago

Original comment by rhedr...@archenergy.com on 5 Nov 2013 at 4:12