Control Loop Foundation

Batch and Continuous Processes -
Interactive Source for Process Control

Three Element Drum Level Control

This workshop demonstrates how the boiler drum level can be maintained at setpoint using three element feedwater control. This exercise illustrates how the steam flow is incorporated as a feedforward input in the cascade level control.

Step 1. In the Three Element Drum Level Control workspace, observe the response to changes in setpoint and steam flow. Does the change in steam flow impact the drum level?

Step 2. Place the level control in manual mode and observed the impact on the drum level as steam flow changes.