On 2022-11-23 05:23, Ana Delgado via TRNSYS-users wrote:
Moreover, I want to put a safety measure in the code that does not let the temperature inside be higher than -9ºC, and it should turn on the compressor without the input commands. However, I am facing the difficulty of the code turning on and off the compressor immediately. The temperature switches between -8.1ºC and -8ºC. Does anyone here work with type 936 and can help me?
Ana - as the author of that model I'd be happy to help you. Have you considered having your input control signal be the maximum of the two concepts? So the control signal is the maximum of your user-desired behavior and a control signal from a differential controller that's watching that critical -9 C temperature?
You could simply use an equation to combine the controls: On_Refrigerator = MAX(UserControl,CriticalControl)where UserControl is your current external control sequence and CriticalControl is a signal from a differential controller / thermostat that watches the refrigerator temperature and initiates the compressor when it gets too warm. Then simply feed the On_Refrigerator signal to the model.
Jeff -- ---- Jeff Thornton President Thermal Energy System Specialists (TESS) 3 N. Pinckney Street - Suite 202 Madison WI 53703 (608) 274-2577 www.tess-inc.com