[EnergyPlus_Support] Air flow network-Auto WPC- two windows on the same wall, DualSetPointWithDeadBand: Unanticipated combination of heating and cooling loads

["samin.marzban@xxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx>]

Hi All,

 

I have a simple one-zone geometry and I am using AirflowNetwork and IdealLoadAirSystem. For the air flow network I use â??surface average calculationâ?? for wind pressure coefficient.  I have two windows in one wall in my main model. When I add only one window to â??AirFlowNwtwork:Multizone:Surfaceâ?? the simulation goes well, but when I add the second window in the same wall I get this error:

Severe  ** DualSetPointWithDeadBand: Unanticipated combination of heating and cooling loads - report to EnergyPlus Development Team

   **   ~~~   ** occurs in Zone=ZONE ONE During Warmup & Sizing, Environment=SYDNEY WINTER, at Simulation time=01/21 00:00 - 00:10

   **   ~~~   ** LoadToHeatingSetPoint=NAN, LoadToCoolingSetPoint=NAN

   **   ~~~   ** Zone Heating Set-point=21.00

   **   ~~~   ** Zone Cooling Set-point=24.00

   **   ~~~   ** Zone TempDepZnLd=NAN

   **   ~~~   ** Zone TempIndZnLd=NAN

   **   ~~~   ** Zone ThermostatSetPoint=0.00

   **  Fatal  ** Program terminates due to above conditions.

Any ideas what the problem is?

I had a look at this post (https://unmethours.com/question/18510/severe-error-unanticipated-combination-of-heating-and-cooling-loads/), but could not find the answer.

Thanks,

Samin

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Posted by: samin.marzban@xxxxxxxxx

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