November 2009

Top News - November 2009

In this issue

• Trick
• Courses
• Article

---

Trick

Is the tank too small?

Before investing to replace or modify a tank, some questions should be answered…

• What is the role of the tank?
  • Mixing tank
  • Buffer tank between two units
  • Reservoir
  • Accumulator

Is the capacity sufficient (nominal and maximum flow)?

o Mixing tank

• What is the residence time?
• Is mixing adequate?
• Could we improve control strategies?

o Buffer tank

• Between minimum and maximum level, accordingly to actual PID tuning parameters, is worst disturbance rejected?
• If tuning parameters were modified, would it be better?
• Could we improve control strategies?

o      Reservoir

• Could we reduce make-up?
• Could we improve control strategies?

o     Accumulator

• With actual feedrate fluctuation, is the reserve sufficient?
• Could we improve control strategies?

Answering those questions and calculating values will lead to economies and performance improvements. Rarely the final solution will be to modify or replace the tank.

Optimization is a very good investment! Usually, within few weeks, money invested is recovered.

Do not hesitate to contact us; we can help you.

---

Courses

See our calendar: we offer workshops on control strategies, performance supervision, advanced process control, alarm management, etc.

---

Article

See in November and December issues of Control Magazine, an interview of Michel Ruel by Greg McMillan.See Control Talk : «Show Me the Money», Control Magazine, November 2009, P 55.

( http://www.cnotrolglobal.com)

To learn more

To contact us


To unsubscribe: click here