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Re: [TRNSYS-users] Trnsys



Guy,

 

I believe that your suggestion of connecting the PID controller to the auxiliary cooler would work fine. If you have convergence or cycling problems with the PID controller, set the gain extremely low, and the integral equal to the simulation timestep. If you are looking for a cooler with a cooling rate as input, check TESS type 682 – flow stream loads, or you could model an actual cooling coil with chilled water.

 

Best regards,

 

Marcus

 

 

MARCUS JONES, MSc

Energy Department

Sustainable Building Technologies

 

AIT Austrian Institute of Technology

Österreichisches Forschungs- und Prüfzentrum Arsenal Ges.m.b.H.

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From: Guy THOMAS [mailto:guytho@hotmail.com]
Sent: March 22, 2010 4:08 PM
To: trnsys bradley; trnsys trnsys
Subject: [TRNSYS-users] Trnsys

 

Hello everybody,
I'm passing a ventilation stream in my type 56 zone in Simulation studio (after have put temperature, flowrate and RH as inputs in TRNBuild). I am passing the flowrate in type 92 to cool it. And I would like to watch the zone temperature and control it with an PID controller type 23.
But the type 92 have a control function as input and not a cooling rate.
So, is it possible to put a maximum cooling rate in the parameter of type 92 and connect the control signal from type 23 to type 92 control function (in the type 23 parameter i have put a control signal varying between 0 and 1) to control the temperature?
Or is there other solution to cool the air with a PID controller?
Best regards
Guy THOMAS
Etudiant CNAM Paris


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