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Re: [EnergyPlus_Support] Warmup Days





As shown on page 16 (61 of the PDF),

Field: Maximum Number of Warmup Days
This field specifies the number of ?warmup? days that might be used in the simulation before
?convergence? is achieved. The default number, 25, is usually more than sufficient for this
task; however, some complex buildings (with complex constructions) may require more days.
A warning message will occur when the simulation ?runs? out of days:
Loads Initialization did not Converge (CheckWarmupConvergence)
You may be able to increase the Maximum Number of Warmup Days and get convergence,
but some anomalous buildings may still not converge. Simulation proceeds for x warmup
days until ?convergence? is reached (see the discussion under the Temperature Convergence
Tolerance Value field in this object, just above).

If you watch the command window as the program is starting up, you will see it counting the warmup days before it starts the simulation.

Warmup days are not repeated after the simulation for the environment starts.  Each environment (Design Day, Run Period) will have one set of warmup days.

Linda


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