Re: [TRNSYS-users] Control System for Auxiliary Heater

[David BRADLEY <d.bradley@tess-inc.com>]

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.

 

 

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