[TRNSYS-users] Parameter like an input

David Bradley bradley at tess-inc.com
Fri Feb 26 08:30:23 PST 2010


Manuel,
  The only way is to change the source code and move the parameter to an 
input, then recompiling the Type. The TRNSYS engine reads parameters 
from the input file at the beginning of the simulation and stores them 
internally. They are never reread so while you can make a parameter 
value that is the result of a time dependent equation, only the initial 
result of that equation at the very start of the simulation will be used 
for the parameter value.
Best,
 David


Manuel Daconceicao wrote:
>
> Hello,
>
>  
>
> I see in the TRNSys docs that variables used in place of numerical 
> values for parameter can't be time-dependent quantities. However I use 
> the Tess' Type661, with parameter that's depending on the time (# of 
> timestep to hold value).
>
> Is it possible to make this parameter is considered like an input?  I 
> could make several versions of this Type661 and add an equation that 
> chooses the right output depending on the time but it's not possible 
> because it will make too lots of trnsys modules.
>
> So this solution is not possible right here right now. Is there 
> another solution for me?
>
>  
>
> Thank you in advance for your help.
>
>  
>
> Manu
>
>  
>
>  
>
>  
>
> *MATRI/ciel/** sa*
>
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