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