[TRNSYS-users] Control System for Auxiliary Heater

David BRADLEY d.bradley at tess-inc.com
Tue Feb 18 08:49:07 PST 2014


Hossein,
   If you have access to the TESS controls library, there is a Type980 
(on/off time calculator) that will tell you when an hour has elapsed 
since the circulating pump stopped. I think if you combine its output 
with the result of an equation (or a thermostat model output) to watch 
the return temperature you can get close to the control strategy that 
you describe.
Kind regards,
  David


On 2/18/2014 07:14, Hossein Khosravi Bakhtiari wrote:
>
> Dear trnsys_users,
>
> I need to model a control system in TRNSYS to turn on the auxiliary 
> heater (which is connected to the thermal storage tank) according to 
> the following control strategy:
>
> If the return temperature from the radator has stayed lower than a 
> specified constant value for more than 1 hour since the last stop of 
> the circulating pump of the space heating circuit, the control unit 
> sends a control signal with the value of 1 to the auxiliary heater.
>
> I have attached the TRNSYS file of my model as well.
>
> I appreciate your help in advance.
>
> Best Regards,
>
> Hossein.
>
>
>
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users at cae.wisc.edu
> https://mailman.cae.wisc.edu/listinfo/trnsys-users

-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

P:+1.608.274.2577
F:+1.608.278.1475
d.bradley at tess-inc.com

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

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