7ERT 422/4ERT 422/4

Piping and instrumentation Piping and instrumentation diagram (P&id)diagram (P&id)

MISS. RAHIMAH BINTI OTHMAN(Email: rahimah@unimap.edu.my)

Which of the following statements are true?

(a)Feedback and feedforward control both require measured variable.

(b)The process variable to be controlled is measured in feedback control.

(c)Feedforward control can be perfect in the theoretical sense that the controller can take action via the manipulated even while the controlled variable remains equal to its desired value.

(d)Feedforward control can provide perfect control; that is, the output can be kept at its desired value, even with an imperfect process model.

(e)Feedback control will always take action regardless of the accuracy of any process model that was used to design it and the source of a disturbance.

QUIZ1

False/True

False/True

False/True

False/True

False/True

QUESTION 1:

QUIZ1

QUESTION 3:

Figure below shows the boiler system that used to supply hot steam to a turbine. This system need to supply 100 psi hot steam to the turbine where the PCV-100 will be opened when the pressure reached that desired pressure. With using pressure control through temperature measurement in the boiler, draw a feedforward loop control system.

BOILER

Process variable need to be controlled = Pressure

Water Hot steam

PCV-100

PIPING AND INSTRUMENTATION DIAGRAM (P&ID)

Which of the following statements are true?

(a)Feedback and feedforward control both require measured variable.

(b)The process variable to be controlled is measured in feedback control.

(c)Feedforward control can be perfect in the theoretical sense that the controller can take action via the manipulated even while the controlled variable remains equal to its desired value.

(d)Feedforward control can provide perfect control; that is, the output can be kept at its desired value, even with an imperfect process model.

(e)Feedback control will always take action regardless of the accuracy of any process model that was used to design it and the source of a disturbance.

QUIZ1

False/True

False/True

False/True

False/True

False/True

QUESTION 1:

Answer 1:

Batch distillation

Reactor

Distillate product tank

Acid feed tank

Ethanol-water mixture

Cold water in

Hot water out

Ethanol liq.

Ethyl acetate

Condenser

The Block Flow Diagram (BFD)

Answer 1 Figure below shows the boiler system that used to supply hot steam to a turbine.

This system need to supply 100 psi hot steam to the turbine where the PCV-100 will be opened when the pressure reached that desired pressure. With using pressure control through temperature measurement in the boiler, draw a feedforward loop control system.

BOILER

TT

Process variable need to be controlled = Pressure

TIC Y

Water Hot steam

PI

PIPING AND INSTRUMENTATION DIAGRAM (P&ID)