32 For the following processes identify the process variable

32. For the following processes identify the process variable, measured variable and manipulated variable and the FCE? Process Variable Measured Variable Manipulated Variable FCE sensor Bamery Process Variable Rotating disk Measured Variable Speed DC DC mtorManipulated Variable FCE senso Process Variable Measured Variable Manipulated Variable FCE Process Variable Measured Variable Manipulated Variable FCE senso

Solution

a) for the first process

Process variable - Fluid in the vessel is heated by the heat exchanger. Measuring the temperature the steam flow to the exchanger is controlled. Temperature changes when the amount of steam is changed. So The process variable is the temperature

Measured variable - temperature

Manipulated - flow

Sensor - temperature transmitter

b) second process

Process variable - voltage

Measured variable - current

Manipulated - speed

Sensor - battery

c) third process

Process variable -A valve in the flow channel controls the flow through the pipeline. The greater the valve opening the fluid flow inside the pipe. Here we are controlling the flow the fluid passing through the pipeline , so the process variable is flow

Measured variable - rate of flow

Manipulated - fluid pressure

Sensor - flow transmitter

d) fourth process

Process variable - temperature

Measured variable - temperature

Manipulated variable - heat

Sensor - temperature transmitter