Dear Trnsys users,
I am modeling a solar assisted absorption chiller. In this system, a hot water storage tank is used to store solar thermal energy. The cycle is also equipped with an auxiliary heater which is switched on in case the tank temperature is lower than a certain value. I need to generate a control signal (either 0 or 1) representing if the tank is on or off. The following briefly describes the intended control strategy:
The tank is on (control signal=1) if the bottom node temperature is greater than 88 C and it is deactivated (control signal value=0) in case the temperature at the top of the tank is less than 88 C. In this case, the tank could be charged while the auxiliary heater is operating.
I suppose an on/off differential controller would work for above mentioned strategy (an equation box may be needed to be used as well) but do not know how to make it work! I would really appreciate it if you could give me hand in this regard.
Looking forward to hearing from you soon.
Regards,