Lecture 2 Control Instrumentation 1.P&ID, PFD 2.Control Hardware Elements 1.Sensor / Transducer...
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Transcript of Lecture 2 Control Instrumentation 1.P&ID, PFD 2.Control Hardware Elements 1.Sensor / Transducer...
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Lecture 2 Control Instrumentation
1. P&ID, PFD
2. Control Hardware Elements
1. Sensor / Transducer
1. Actuator
2. Controller
- Do I have confident feeling of understanding practical control elements?Chem. Eng. Process Control
06-205 Chemical Engineering Process Control © Il Moon
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1. P&ID, PFD
Chem. Eng. Process Control 1
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Chem. Eng. Process Control 2
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2. Control Hardware Elements
(Marlin)
Process
Sensor / Transducer
Chem. Eng. Process Control 3
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3. Sensor / Transducer
(SEM)
Chem. Eng. Process Control 4
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4. Actuator
* Valve characteristics
- flow rate
- flow characteristics
Linear :
Quick opening :
Equal percentage :
Chem. Eng. Process Control 5
(SEM)
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5. Controller
ControllerPV
SP
CO
Chem. Eng. Process Control 6
Sensor /Transmitter
Controller
T y
T y
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Chem. Eng. Process Control 7
1. Sensor
- Temperature : thermocouples, RTD, bimetal, pyrometer - Pressure : manometer, bellows, diaphragm, strain gauges - Flow : orifice, venturi, turbine, ultrasound - Liquid Level : float, displacer, conductivity, head pressure - Composition : GC, IR, UV, conductivity meter, potentiometry, pH, spectrometer
2. Controller
- PID, DDC
3. Actuator
- valve, pump, motor
4. Transmitter
4~20mA, 3~15psig
Summary