modelController

Information

This example validates Buildings.Controls.OBC.ASHRAE.G36.Plants.Chillers.HeadPressure.Controller. It demonstrates the setpoint controls according to the head pressure control. It has four instances:

It shows the following process:

• For instance enaWSE, since the economizer is enabled, the condenser water pump speed setpoint yConWatPumSpeSet equals the design condenser water pump speed; the maximum tower speed setpoint is maximum (1); and the head pressure control valve setpoint is mapped from the loop output.
• For instance disWSE, the economizer is disabled. The head pressure control valve is fully open. The maximum tower speed setpoint and the condenser water pump speed setpoint are mapped from the loop output, which ranges from 0 to 0.4. Thus, the maximum tower speed setpoint is from 1 to 0.28, and the pump speed setpoint is kept at maximum (1).
• For instance conSpePum, the pump speed is constant. The maximum tower speed setpoint and the head pressure control valve setpoint is mapped from the loop output, which ranges from 0 to 0.4. Thus, the maximum tower speed setpoint is from 1 to 0.28, and the head pressure control valve setpoint is kept at maximum (1).
• For instance varSpePum, the pump speed is variable. The maximum tower speed setpoint and the condenser water pump speed setpoint is mapped from the loop output, which ranges from 0 to 0.4. Thus, the maximum tower speed setpoint is from 1 to 0.28, and the pump speed setpoint is kept at the design condenser water pump speed.

Components

Revisions

• April 2, 2019, by Jianjun Hu:
  First implementation.