[TRNSYS-users] output time

[David BRADLEY]

Pu,

  The building uses a method called the conduction transfer function 
method to compute response factors for the walls. Inherent in that 
method is a time base; s sort of "duration" for how long each 
coefficient in the transfer function is in effect. It may be that the 
jumps you are seeing conincide with the timebase of your building model. 
Try going into TRNBuild and open the "outputs" window. Change the wall 
timebase from (perhaps) 1hr to 0.5hrs and see if the frequnency of those 
jumps changes as well.

kind regards,

  David


On 07/10/2022 20:44, Huijie Pu via TRNSYS-users wrote:
> Hello,
>      I built a room model with Cooling set to 26 degrees and gain set 
> to ASHRAE_115W-Person_AIII_24癈, for a total of 60 people. The 
> simulation time step is 0.01h. But the output value QCOOL does not 
> know why it is a sharp rise in one hour. In the following model 
> construction, Cooling is turned off, and PID is used to adjust the 
> temperature. The obtained temperature change is also a change in one 
> hour as a stage, and the airflow output by PID is also like this.
>
>    I would like to know if this is how the output changes originally, 
> or what parameters need to be adjusted to change? When using the 
> output of PID, I don't know whether it is a problem with the setting 
> of the PID parameters, or the time setting of the system?
>
> kind regards,
> Pu
>
>
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users at lists.onebuilding.org
> http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org

-- 
***************************
David BRADLEY
Principal
Thermal Energy System Specialists, LLC
3 North Pinckney Street - suite 202
Madison, WI  53703 USA

P:+1.608.274.2577
d.bradley at tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com
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