I have a problem with the plant flows when I change the control type temperature in a HVAC Radiant System

asked 2019-04-30 11:21:24 -0500

RoseteEros's avatar

updated 2019-04-30 12:19:30 -0500

I have a simple loop for HVAC radiant system. I use the next object

Object: ZoneHVAC:CoolingPanel:RadiantConvective:Water 
Field: ControlType 
Default: MeanAirTemperature

Everything is ok, without warnings but when I change the ControlType to “MeanRadiantTemperature” or “OperativeTemperature”. I get the following error:

** Severe ** Plant flows do not resolve -- splitter inlet flow does not match branch outlet flows
** ~~~ ** Environment=SUMMERWEEK, at Simulation time=04/02 01:30 - 01:40 
** ~~~ ** PlantLoop name= CHILLED WATER LOOP 
** ~~~ ** Plant Connector:Mixer name= CW DEMAND MIXER 
** ~~~ ** Sum of Branch outlet mass flow rates= 0.000000 {kg/s}    
** ~~~ ** Plant Connector:Splitter name= CW DEMAND SPLITTER     
** ~~~ ** Splitter inlet mass flow rate= 3.248341E-002 {kg/s}     
** ~~~ ** Difference in two mass flow rates= 3.248341E-002 {kg/s}

I’m sure the connections are ok. Does anyone have any idea what’s wrong?

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Is this a sizing run failure? If so, check the design day schedules and sizing criteria.

mdahlhausen's avatar mdahlhausen  ( 2019-04-30 12:03:47 -0500 )edit