[TRNSYS-users] Avarage temperature and wheghted average during operation

[David Bradley]

Bengt,
   If you want to see a temperature only during collector operating times, 
I think you can use an equation that sets the temperature to an arbitrary 
value when the collector is not running. For example, let us say that you 
have an equation that sets a variable (PumpON) to a value of 1 if the 
collector pump is ON and to 0 if the collector pump is OFF. You could then 
use that value as a multiplier on your collector outlet temperature

EQUATIONS 1
T_OUT = PumpON*[1,1] + 999*(1-PumpON)

the variable T_OUT will have the value of the collector outlet temperature 
whenever PumpON is 1 and will have a value 999 when PumpON is 0.

If you are interested in some metrics (average temperature, min 
temperature, max temperature, etc.) during specific time periods of the day 
then you can use Type55 (Periodic Integrator) which is a little complicated 
to set up but is designed to look at outputs only during part of the 
simualtion.
Kind regards,
  David





At 01:36 1/18/2007, Bengt Perers wrote:
>Dear TRNSYS users,
>I just have a simple question how to create a temperature output that is only
>for the opering time of a solar collector for example.
>
>I could not find a simple solution right now with just a printer or a simsum.
>
>By first using equations then integration and finally a printer it is possible
>but I was looking for a simpler solution in one component if possible.
>
>In some cases a simultaneous weighting of the temperature by for example 
>energy
>would also be desirable.
>
>Just time averaging over all timesteps is efficient in Type 28 using a few
>Polish notation operators for the variable. I was looking for a similar
>solution.
>
>Best Regards,
>Bengt
>
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