Heat exchanger temperature control is common to all process industries. However, many temperature control loops have a difficult time maintaining setpoint. The controller performance is excellent at normal plant rates, but is unacceptable at lower rates for plant startup. Sometimes the temperature control loop sees frequent visits from the Control Engineer for re-tuning, or perhaps…
Many of us have experience with processing facilities of some kind. By this, I mean petrochemical plants, refineries, food processing facilities and distilleries (to name a few). How many of us are privy to the day-to-day frustrations from the Operating teams? The seals on P-123 have failed again. I thought Engineering already put in tougher…
Happy New Year! I created a video series that describes how process hydraulic behaviour can cause perfectly good PID controllers to become unreliable. Facilities can increase capacity by addressing these issues, often with no additional capital. Part 1: Control Problems The symptoms of a control problem are described. Part 2: Tuning Strategies Two different tuning…