Air Loop Simulation Environment Variables¶

To facilitate comparing the runtime performance of various solution techniques for the air loop simulation a mechanism to track runtime statistics has been implemented in EnergyPlus. To facilitate debugging the air loop simulation a tracing mechanism operating either at the air loop-level or at the controller-level has been implemented in EnergyPlus.  To use, one uses the "Set" command and the value as indicated.

TRACK_AIRLOOP: Runtime performance tracker for air loop simulation¶

Setting to "yes" will cause EnergyPlus to track the performance of the air loop simulation at runtime and dump the results in a file named "statistics.HVACControllers.csv" upon ending the simulation.  (Uses logical variable TrackAirLoopEnvFlag in module DataSystemVariables).

Set TRACK_AIRLOOP = yes

TRACE_AIRLOOP: Air loop simulation tracer¶

Setting to "yes" will cause EnergyPlus to write to a trace file named "controller.\<Air Loop Name>.csv" the converged solutions of all controllers defined on each air loop, at each HVAC iteration.  (Uses logical variable TraceAirLoopEnvFlag in module DataSystemVariables).

Set TRACE_AIRLOOP = yes

TRACE_HVACCONTROLLER: Individual HVAC controller tracer¶

Setting to "yes" will cause EnergyPlus to write to a trace file named "controller.\<Controller Name>.csv" a detailed description of each controller iteration at each HVAC iteration.  (Uses logical variable TraceControllerEnvFlag in module DataSystemVariables).

Set TRACE_HVACCONTROLLER = yes