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This lecture was delivered by Dr. Sakal Japendu for Process Control course at Ambedkar University, Delhi. It includes: Control, Objectives, Benifits, Objectives, Chemical, Process, Indicators, Variability, Operation, Quality
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Vaporproduct Liquidproduct
Processfluid
Steam
F1 F
F
T
T
T5 T
T
T
P
L A
L. Key
Protection protection production rate diagnosis
SEVEN CONTROL OBJECTIVES
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Vaporproduct Liquidproduct
Processfluid
Steam
F1 F
F
T
T
T5 T
T
T
PC
L A
L. Key
Protection protection production rate diagnosis
SEVEN CONTROL OBJECTIVES
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Vaporproduct Liquidproduct
Processfluid
Steam
F1 F
F
T
T
T5 T
T
T
P
L A
L. Key
Protection protection production rate diagnosis
SEVEN CONTROL OBJECTIVES
To flare
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Feed
Vaporproduct Liquidproduct
Processfluid
Steam
F1 F
F
T
T
T5 T
T
T
P
L A
L. Key
Protection protection production rate diagnosis
SEVEN CONTROL OBJECTIVES
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Feed
Vaporproduct Liquidproduct
Processfluid
Steam
F1 F
F
T
T
T5 T
T
T
P
L A
L. Key
Protection protection production rate diagnosis
SEVEN CONTROL OBJECTIVES
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Vaporproduct Liquidproduct
Processfluid
Steam
FC^ F
F
T
T
T5 T
T
T
P
L A
L. Key
Protection protection production rate diagnosis
SEVEN CONTROL OBJECTIVES
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Feed
Vaporproduct Liquidproduct
Processfluid
Steam
F1 F
F
T
T
T5 T
T
T
P
L AC
L. Key
Protection protection production rate diagnosis
SEVEN CONTROL OBJECTIVES
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Feed
Vaporproduct Liquidproduct
Processfluid
Steam
F1 F
F
T
T
T5 T
T
T
P
L A
L. Key
Protection protection production rate diagnosis
SEVEN CONTROL OBJECTIVES
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Feed
Vaporproduct Liquidproduct
Processfluid
Steam
F1 F
F
T
T
T5 T
T
T
P
L A
L. Key
Protection protection production rate diagnosis
SEVEN CONTROL OBJECTIVES
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Feed
Vaporproduct Liquidproduct
Processfluid
Steam
F1 F
F
T
T
T5 T
T
T
P
L A
L. Key
Protection protection production rate diagnosis
SEVEN CONTROL OBJECTIVES
time
UA
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BENEFITS FROM PROCESS CONTROL
When we control a process, we reduce the variability ofkey variables to achieve the seven objectives.
Without feedback control 0
50
100
150
200
250
300
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400
450
500
6 5 4 3 2
time (min)
outlet concentration^0
50
100
150
200
250
300
350
400
450
500
(^51) 50.5 (^50) 49.5 49
time (min)
valve position (% open)
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BENEFITS FROM PROCESS CONTROL
When we control a process, we reduce the variability ofkey variables to achieve the seven objectives.
With feedback control 0
50
100
150
200
250
300
350
400
450
500
3.5^3 2.
time (min)
outlet concentration
0
50
100
150
200
250
300
350
400
450
500
100 80 60 40 20
time (min)
valve position (% open)
Variability is moved from controlled to manipulated variable!
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