> I am using Type 121b as a preheater for the outdoor air. I combined the > heater with a controller (type2) that > makes sure the air is heated whenever the outdoor air temperature is below > 16°C. This controller gives a control function to type 121b. I've put the > setpoint of the heater to 16°C. > (I ignore heat losses), but every time the outdoor temperature is already > 16°C before heating up, > the heater heats still heats up the air and the temperature becomes > 50 or > 60°C. > Can someone help me with this?
Without seeing your input file it's impossible to tell you what's happening in your simulation, but you do not need a Type 2 controller if you're using the furnace. Simply set the setpoint to 16 C, with a large capacity, and leave the control signal set to a constant value of 1.0. The internal controls will keep the outlet at 16 C if the inlet temperature is below 16 C. Jeff **************************************************************** Jeff W. Thornton President - Thermal Energy System Specialists 2916 Marketplace Drive - Suite 104 Madison WI 53719 (608) 274-2577 _______________________________________________ TRNSYS-users mailing list [email protected] https://www.cae.wisc.edu/mailman/listinfo/trnsys-users
