Re: [EnergyPlus_Support] convergence value

["Michael J. Witte" <mjwitte@xxxxxxxx>]

No.  These convergence toleranaces in the BUILDING object are only used to 
determine how many warmup days are simulated. The max/min zone temperatures and 
zone loads are compared from one warmup day to the next.  If they are within 
these tolerances, then warmup is declared to be converged and the simulation 
proceeds.  If not, another warmup day is run.  (Ref. Input Output Reference, p. 
10, pdf p 40).

Zone thermostat controls have no tolerance or throttling range.  If the heat 
balance predicts that the zone temperature will fall below the heating setpoint 
by any amount, then a heating load request is passed to the HVAC system.

Mike


On 10 Apr 2005, at 20:50, ogocer@xxxxxxxxxxxxxx wrote:

> 
> Dear all,
> i want to check my information about convergence value in C degree or Watt. i
> understand it according to the following explanation, we set some setpoints in
> temperature or watt. for example heating setpoint is in c or shading setpoint is
> in watt. if i set heating setpoint 21 C degrees and my convergence tolerence
> value is 0.4 c degree. Then heating will also start at 20.6 C degree. "This
> value represents the number at which the loads values must agree before
> ?convergence? is reached. (Units for this field is Watts.) Field: Temperature
> Convergence This value represents the number at which the zone temperatures must
> agree (from previous iteration) before ?convergence? is reached. (Units for this
> field is delta C)." is it correct? or am i wrong? thanks all O.Gocer
> 
> 
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> 
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> 
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> 
> 






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