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[EnergyPlus_Support] Re: ERROR - plant flows do not resolve

1) Step 1: Submit ticket on energy plus support helpdesk
2) Look for a branch that should be "passive" instead of "active"

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "brainwt" <deukwookim@...> wrote:
>
> Dear developers, 
> 
> I��m modeling large office building using E+. But, the simulation is stopped during the hot water loop calculation. 
> 
> I already checked all loop integrity, and node connections are fine, and all input values of water flow-rate is auto-sized. (I��m very confused) 
> 
> I really need a help, developers. 
> 
> Error messages are as follows. 
> ====================================================================
> 
>    ** Warning ** PlantSupplySide: PlantLoop="HW LOOP", Error (CheckLoopExitNode) -- Mass Flow Rate Calculation. Outlet and Inlet differ by more than tolerance.
>    **   ~~~   **  Environment=6 WOL, at Simulation time=06/01 02:50 - 03:00
>    **   ~~~   ** Loop inlet node=HW LOOP SUPPLY SIDE HP-1X2 INLET, flowrate=65.1315 kg/s
>    **   ~~~   ** Loop outlet node=HW LOOP SUPPLY SIDE OUTLET, flowrate=82.2017 kg/s
>    **   ~~~   ** This loop might be helped by a bypass.
>    ** Severe  ** plant flows do not resolve -- splitter inlet flow does not match mixer outlet flow
>    **   ~~~   **  Environment=6 WOL, at Simulation time=06/01 02:50 - 03:00
>    **   ~~~   ** PlantLoop name= HW LOOP
>    **   ~~~   ** Plant Connector:Mixer name= HW LOOP SUPPLY MIXER
>    **   ~~~   ** Mixer outlet mass flow rate= 82.201721 {kg/s}
>    **   ~~~   ** Plant Connector:Splitter name= HW LOOP SUPPLY SPLITTER
>    **   ~~~   ** Splitter inlet mass flow rate= 65.131457 {kg/s}
>    **   ~~~   ** Check control type for branches between, components that request flow should be ACTIVE control type
>    **  Fatal  **  Simulation terminated because of problems in plant flow resolver
>    ...Summary of Errors that led to program termination:
>    ..... Reference severe error count=1
>    ..... Last severe error=plant flows do not resolve -- splitter inlet flow does not match mixer outlet flow
> 
> ====================================================================
> 
> Could you please let me know the reasons,
> &#61548;	Where this messages coming from generally? 
> &#61548;	What is the first priority which I have to check out?
> 
> Plant loop is set to the two-way common pipe to simulate primary (80 deg) and secondary (60 deg) water loop. I think that this setting causes the error. 
> 
> Any comment would be appreciated.
> 
> Best regards, 
> Deuk-Woo Kim
>




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