kbenne / cbecc

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CBECC Com issue - water heating #849

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago
Version = 2013_3_653

Category = Water Heating

Issue Summary:
analysis wont complete and I can’t figure out what the problem is.

Original issue reported on code.google.com by f.le...@gmail.com on 13 Nov 2014 at 11:53

Attachments:

GoogleCodeExporter commented 9 years ago
There are a number of issues with your model.  First, you have a water heater 
connected to a fluid system of type “HotWater.”  This should be type = 
“ServiceHotWater.”  Type = HotWater are used for heating hot water only.  
Correcting this corrected the error having to do with the water heater required 
inputs.  

However, the water heater is specified as type = Storage, but you have storage 
capacity of 1 gallon.  This is too low for storage water heaters, so I changed 
the type to instantaneous.  If it is a storage water heater, then the storage 
capacity should be significantly higher.  

Also, on the project screen under Exceptional Conditions you have the condition 
that service water heating is excluded from the building set to yes, while a 
service hot water system is defined in the model.  I set this condition to 
“No.”

For the HVAC system, you have the supply fan and the heating coil on different 
supply air segments, these should be on the same air segment.    Normally, air 
systems will have one supply segment and one return segment.  Then all the 
terminal units will be connected to the one supply segment.  These two air 
segments will also be referenced by the outdoor air control object.   

I think if you correct these issues, you should get a working simulation.  Let 
me know if you have additional problems.  

Noah, I think we need a checksim that catches water heaters attached to fluid 
systems that are not ServiceHotWater.  

Original comment by rhedr...@archenergy.com on 14 Nov 2014 at 12:31

GoogleCodeExporter commented 9 years ago

Original comment by rhedr...@archenergy.com on 14 Nov 2014 at 12:32

GoogleCodeExporter commented 9 years ago

Original comment by ncz...@archenergy.com on 18 Nov 2014 at 6:41