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OSE571 Ocean Plant Design
Process O peration and Control Philosophy
Korea dvanced Institute of
Science and Technology
aejun CHAN G([email protected])
ivision of Oce an System Engineering
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Design Procedure and Key deliverablesDesign Procedure and Key deliverables
Design Basis (Philosophy)
Concept Consolidation
Process Flow Diagram
Process Simulation
Equipment Specification
Equipment Design
System Description
Production Availability?
Ocean Systems EngineeringOcean Systems Engineering
Process Operation and
Control Philosophy
P&ID
Layout
HAZOP
Risk AssessmentSafety Studies
Caution: Not universally applicable
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Hazards and S afety Systemsazards and Safety Systems
Accident Controlling Protection
(F&G Detection, ESD, Depressurization, Alarm)
Accident Mitigating Protection
(Active/Passive Fire Protection, Fire/Blast Walls)
Emergency Response
(Escape Route, TR, Evacuation Means,
Rescue Equipment, Emergency Power)
Accident:Fire/Explosion
2 Ocean Systems EngineeringOcean Systems Engineering
Inherent Safety Design(Layout, Inventory, Leak, Ignition)
Basic Process Control
(P, T, F, Surge, Back Pressure)
Preventive Protection
(Structural & Machinery Integrity, Relief, PSV)
Gas Leak
Layered Structure of Safety Systems against Fire and Explosion
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P&ID (W11)
Process Operation and Control Philosophy (W9)
System Description (W4)
Workflow for Process ControlWorkflow for Process Control
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Field Implementation
Logic Diagram
Functional Design Specification (W11)
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The key document for operation and control
Operation Philosophy
Big picture of operation
Operation modes defined
Operation philosophy for each mode
Safety instrumentations
What is in the process operation and control philosophyhat is in the process operation and control philosophy
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Control Philosophy
Detailed feature
Unit-by-unit description
Control loops defined
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Big picture of operation
Working principles
Degree of automation
Number of operators required
Operation Philosophyperation Philosophy
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Operation modes defined
Operation philosophy for each mode
Safety instrumentations
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Big picture of operation
Operation modes defined
Steady
- Operational cases: loading, offloading, etc.
- Capacity: Max, Normal, Min (turndown)
Dynamic
Operation Philosophyperation Philosophy
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- -- Shutdown
- Emergency shutdown
Operation philosophy for each mode
Safety instrumentations
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Big picture of operation
Operation modes defined
Operation philosophy for each mode
Safety instrumentations
Operation Philosophyperation Philosophy
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Causes and counter measures
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Detailed feature
Subsystems (units), equipment, components
Control targets and variables
Set points
Control and operation procedure
Control Philosophyontrol Philosophy
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Unit-by-unit description
Control loops defined
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Detailed feature
Unit-by-unit description
Follow the main stream
Describe the situation and circumstance where control is required
Describe how to manipulate the components
Control Philosophyontrol Philosophy
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Control loops defined
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Detailed feature
Unit-by-unit description
Control loops defined
Controlled variables with set point
Manipulated variables
Control Philosophyontrol Philosophy
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Disturbances
Working mechanism
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Why about control of other subsystems like power generation?
Utility: well proven, repeated design Well established control
Process: specific to the facility
New design Need to establish the control algorithm
Who will take care about the followings tasks including P&ID and
logic diagram?
Som e Questionsome Questions
2 Ocean Systems EngineeringOcean Systems Engineering
process eng neers
Logic diagram electrical engineers
Functional design specification (W11) to bridge them
Can we make it without knowledge of control theory?
Advanced controls very rare in real process industry (Why?) Fundamental understanding of the process control enough