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[TRNSYS-users] Type4 - control strategy



Dear Trnsys users,
 
I would like to use Type4 storage tank with one auxiliary heater, only controlled by a ON/OFF controller (Type2). 
However, it seems that the other conditions (temperature conditions inside the tank: Tthermostat < Tset and Tnode < Tset - Tdb) already control the ON/OFF cycle of the auxiliary heater.
What can I do to avoid those two conditions ? If I give the same value to Tdb and Tset , auxiliary heater doesn't work.
I modeled a tank with one node.
 
Thank you for your answers,
 
Amandine LE DENN

INSA Toulouse
Mel: amandine.le-denn@tecsol.fr
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TECSOL
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Tel: +33(0)4.68.68.16.40
Fax: +33(0)4.68.68.16.41