RE: [EnergyPlus_Support] - Uploaded Dual Duct file

["Michael J. Witte" <mjwitte@xxxxxxxx>]

A dual duct system needs two air branches, each with an exit node.  
These exit nodes are listed in a node list which is specified as the 
"AirLoop Outlet Nodes" list in the AIR PRIMARY LOOP object.  These 
nodes, and the order in which they are listed, must correspond with 
the nodes in the "SupplyAirPath ZoneEquipGroup Inlet Nodes" list.

I only see one air branch in your simulation.  You need a branch for 
the hot side and a branch for the cold side.  See one of the dual 
duct examples, such as

\EnergyPlus\ExampleFiles\Misc\DualDuctVarVolDamper.idf

Also, I see many set point managers all acting on the same node (Air 
Loop Outlet Node).  This will not work as you expect.  Each setpoint 
manager will overwrite the value placed on the setpoint node, so only 
the last one in the list will actually control the node.

Mike


On 7 Sep 2003, at 16:09, Samuel Roose wrote:

> I have two issues with a file I have just uploaded (dualduct.idf). One
> is that I am trying to run the dual duct system and maintain the air
> loop - I get this error message:
> 
>    ** Severe  ** Air System:number of air system exit nodes must match
>    number of zone equip inlet nodes ** Severe  ** Branch for Air
>    System=TYPICAL TERMINAL REHEAT 1, has an error. **   ~~~   **
>    Probable missing or misspelled node referenced in the branch(es):
>    **   ~~~   ** Possible Error in Branch Object=AIR LOOP MAIN BRANCH
>    **  Fatal  ** Errors found getting Air Primary Loop
> 
> It is not clear to me which nodes to put where for this one. 
> 
> The other issue is that I am trying to gain energy consumption data
> for the two gas boilers in the file. I have put a "Gas: Facility"
> meter in, but this does not register any values in the output. The hot
> water loop demand results also seems to be cumulative. Is there an
> output which can give me the gas consumption per hour for these
> boilers, or are the boilers in the file not functioning for some
> reason?
> 
> Thanks in advance,
> 
> Sam Roose
> Victoria University of Wellington
> 
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========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx


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