explain Cascade Control strategy with the help of a block
diagram. also exlain its working in a distillation column
Answers were Sorted based on User's Feedback
Answer / inbu raja e k
cascade control strategy is the one in which you have 2
control loops, a primary loop and a secondary loop. The
output of the secondary controller will the reference or
set point to the primary controller.
Cascade control is most advantageous on applications where
the secondary closed loop can include the major disturbance
and second order lag and the major lag is included in only
the primary loop. The secondary loop should be established
in an area where the major disturbance occurs. It is also
important that the secondary variable respond to the
disturbance. If the slave loop is controlling flow and the
disturbance is in the heat content of the fluid, obviously
the flow controller will not correct for this disturbance.
In distillation column it is used as a composition control
where the feed flow is the primary control and condense
flow out is the secondary loop
Is This Answer Correct ? | 19 Yes | 7 No |
Answer / amit123.inc
Dear Inbu Raja E K-Actually the output of the primary controller is used as the reference or setpoint for the secondary controller.
Is This Answer Correct ? | 6 Yes | 0 No |
why micro controller 8051/52's clock frequency is internally divide by 12 ?? and why it is further divide by 32 in UART serial communication ??
How to Calibrate Ultrasonic Level Transmitter in field
Why we use the double acting control valve in flow line?
What is Droop? What is Step/Gradient Limiter in Turbine Governor control?
In oil & gas industries and petrochemical industries, there are classification of zones like zone 0, zone 1, zone 2. Is there any differences in voltages or power supply supplied for the process instruments, control instruments depending on the zones
What is the formula to convert mv to temperature in k type thermocouple?pls simply elaborate? I got one ans.it is Temp=mv×25°+atmospheric temp,but here what is 25°,i confusef ,so pls????
The pressure class rating (such as 150 lb, 300 lb, etc.) of a line appears in the form of ________________ in the Line Number (or Line Designation) on a P&ID
why pneumatic control signal output is use 0.2 to 1 kg/cm2
what is the difference between the microcontroller and PLC?
what is control valve and how is work
Waht is surge in compressors and how to control it?
i install a DP transmitter of Faugi on drum level of boiler but i face a problem in it when i engergize the transmitter the meter shows 0 or 100% no variation in it.the distance of two points is 19.5 inches, i am in trouble please suggest me what can i do it's very urgent Please reply me as soon as possible Best regards ikraam haider