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Presentation Title

Optimize & debottleneck flare system Design Aspen Flare system Analyzer

Sunil Patil Principal Business Consultant September 14, 2012

© 2010 Aspen Technology, Inc. All rights reserved

Rev. 2011-08

Agenda
What is Aspen Flare System Analyzer?
Aspen Flare System Analyzer Capabilities
Whats New in V7.3?
Demonstration

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Presentation Title

What is Aspen Flare System Analyzer?
Steady State Flare Network Simulator – Models from the relieving device to the flare tip – Can model flare or vent systems


Performs balances around the system – Material – Energy – Hydraulic


Design or rate systems according to user defined design constraints
Documents the flare system into one file – Scenarios – Topology – Results © 2010 Aspen Technology, Inc. All rights reserved

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What is Aspen Flare System Analyzer?...
Type of system can handle – Convergent Systems – Divergent Systems – Looped Systems


Model size – Practically no limit

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Presentation Title

Design or Rate Convergent Systems

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Rate Divergent Systems

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Presentation Title

Rate Looped Systems

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Model Size
No Limit on Model Size

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Presentation Title

Model Size
Large Installations can be modelled with ease

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Agenda
What is Aspen Flare System Analyzer?
Capabilities
Whats New in V7.3?
Demonstration

© 2010 Aspen Technology, Inc. All rights reserved

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Presentation Title

Aspen Flarenet Capabilities Calculations – VLE /Thermodynamics





Compressible Gas, Vapor Pressure, Peng-Robinson, SRK

– Hydraulics







Isothermal Gas, Adiabatic Gas, Beggs & Brill, Dukler Lockehart Martinelli etc

– Different Hydraulics methods can be specified for
Horizontal
Vertical
Inclined pipe

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Aspen Flarenet Capabilities Calculations (cont’d) – Multiple or single scenario analysis
Scenarios can model single or multiple sources relieving – Emergency shutdown – Plant fire – Loss of power or cooling – Equipment failure

– Automatic line sizing – Automatic design violation print
User defined constraints – Noise, ρv2, velocity, Mach No. & back pressure

– Flare tip modelling
Pressure drop vs. flow curves @ multiple MWs

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Presentation Title

Aspen Flarenet Capabilities Calculations (cont’d) – Calculation of external HTC for pipes from ambient conditions
Insulation may be included

– Extensive fittings and piping databases
Both can be customised by user

– Interface to Aspen HYSYS, Aspen Plus, Excel, Access
Transfer stream info from Aspen HYSYS/Aspen Plus to sources
Import/Export data from Access/Excel database

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Aspen Flarenet Capabilities User Interface – Enhanced process flow diagram style view





Multiple view-ports Display of key process variables Rotation of icons Annotations

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Presentation Title

Aspen Flarenet Capabilities User Interface – Flow map view with superimposition of operating point

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Aspen Flarenet Capabilities User Interface – Profile views display data such as mass flow, velocity, noise and pressure

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Presentation Title

Aspen Flarenet Capabilities User Interface – Single page report of all design violations – Customizable report formats

Violations

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Aspen Flarenet Capabilities User Interface

Violations

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Presentation Title

Agenda
What is Aspen Flare System Analyzer?
Capabilities


Why not Process Simulator?


Whats New in V7.3?
Demonstration
Q&A

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Why not use a process simulator? Calculation Limitations – Simulator does not do sizing calculations. – Pressure drop methods do not include the acceleration term or check for choked flow which is important in high velocity Flare and Vent calculations. – Parameters specific to Flare Systems are usually missing
Rated flow for tailpipes, actual flow for headers
Inlet piping calculations
Do not predict velocity and noise problems

– API guidelines not built into calculations.

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Presentation Title

Why not use a process simulator? Workflow Limitations – Very difficult to handle looped systems
Need simultaneous solver vs. a modular solver

– Multiple design scenarios are impractical because there is no data synchronization.
Flowsheet Simulator – Each scenario is a case
Flarenet – Each case contains all of the scenarios

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Why not use a process simulator Simulator results are not acceptable – For a new design
Lines sizes will be too small.

– For a rating
Will under predict back pressure.

– Do not conform to API design guides. – Do not predict velocity or noise problems.

Can give an unsafe Flare System

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Presentation Title

Agenda
What is Aspen Flare System Analyzer?
Capabilities


Typical Usages


Whats New in V7.3?
Demonstration

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Typical Uses and Benefits
Typical Uses: – E&C companies – for conceptual and detailed design
Reduces design time by sizing the flare network
Finds the min diameter for flare header and tail pipes automatically
Eliminates trial and error method

– Operating companies – for debottlenecking, plant upgrade and feasibility studies
FLARENET sizes and checks network against design constraints
Any violations will be flagged clearly by the program

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Presentation Title

Typical Uses and Benefits
General Information – FLARENET designs or rates pipe networks against single or multiple scenarios, eliminating data manipulations – Fittings pressure drop can be automatically generated or calculated from fitting input – Fitting database customisable and password protected – Pipe Class Editor allows definition of standard pipe schedules and sizes, can define project standards. – FLARENET will implement API 520/521 standards if required

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Agenda
What is Aspen Flare System Analyzer?
Capabilities


Typical Usages


Whats New in V7.3?
Demonstration
Q&A

© 2010 Aspen Technology, Inc. All rights reserved

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Presentation Title

V7.3 - Phase 1 of the new Flare System Analyzer tool

V7.3 Deliverables • New and modernized UI • Componentized architecture and modern code base

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Aspen Flare System Analyzer V7.3 New UI – New Ribbon Design Ribbon groups common tasks Easy access to model icons to build models

Tabs give different views of inputs and results

New navigation pane

Easy zoom in / out

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Presentation Title

Aspen Flare System Analyzer V7.3 New UI – Powerful New Grid Component New grid component for tabular view of key inputs and results

One-click export to Excel Searchable and sortable makes it easy to find information in large models

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Agenda
What is Aspen Flare System Analyzer?
Capabilities
Why not use a process simulator?
Demonstration

© 2010 Aspen Technology, Inc. All rights reserved

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Presentation Title

Demonstration

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