[TRNSYS-users] PID controller

[HUCHEDE, Romain]

Hello Max, 
 
I am currently working on quite the same system
 
Types 537 and 538 from Tess libraries allow to set a desired output temperature. The type will then calculates an sets the output flowrate for the whole solar loop (not the pump).
 
Concerning type 534, You might want to read the "PIO reference manual" in the TESS documentation folder.
 
Hope this helps, 
 
Romain 

________________________________

De : Max Werlein [mailto:maxwithhat at hotmail.com] 
Envoyé : mercredi 15 octobre 2008 13:09
À : trnsys users
Objet : [TRNSYS-users] PID controller


Dear TRNSYS users,

I have a solar collector with a constant area, feeding its outputflow to a storage tank. Cold water leaves the tank through a pump (variable speed type 10) and feeds the collector. I now want to use a PID controller (or feedback controller) so as to regulate the outlet temperature of the collector to lets say 90 ºC by varing the input flowrate of the collector, hence controlling the variable speed pump. This does not seem to work, whereas testin the PID conroller (without Tank) i found out that I can control the collector inlet temperature for a constant  area and flowrate trough the collector. But controlling a temperature by variing the flowrate sonhow does not work.
Maybe anyone has any suggestions?

Thanks and kind regards

max


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