Flaretot is a comprehensive package covering all

aspects of flare system design.

© 2012 Flaretot Ltd

11 2574-6195 na@natecnologia.com.brwww.natecnologia.com.br

© 2012 Flaretot Ltd

The Flaretot program is designed to solve flare network problems, either for revamp or new networks and addresses allpossible conditions of flow likely in flare networks, (compressible, two-phase flashing flow & potential for sonic conditionsat pipe exits). The thorough physical properties calculations ensure both accurate physical properties andthermodynamics. It includes criteria based piping selection using pipe classes to aid in accurate design even for studyprojects.

THE GRAPHICS INTERFACE

At the core of Flaretot, is an easy-to-use windows stylegraphic interface. The point and click and drag and dropfunctionality allows for quick and easy definition of units andconnectivity. The drawing space can be extended ortrimmed at any point to accommodate additional unitsduring flare network development.

The intuitive graphics interface means a minimal amount ofuser training is required to start using Flaretot and thecomprehensive help files and standalone tutorials providedalso reduce software learning curves.

Comprehensive properties may be viewed using customfilters to display only sections of the network of interest, andpipe sizing parameters are included to facilitate soundengineering design. Data an be exported to spreadsheets.

Flowrate, pressure or temperature can be overlaid on thenetwork drawing to give the user instant feedback ondesign problems or bottlenecks in the network.

Use is made of colour coding on the drawing to giveadditional feedback to the user, for eaxmple where data islacking.

Engineering units are fully customisable to suit jobpreferences which helps prevent potential errors in dataconversion for data entry or reporting.

© 2012 Flaretot Ltd

CASE MANAGEMENT

An unlimited number of case studies can be preparedwithin a single file using a logical grid to identifyparticipating elements.

Active sources contributing to flare loads are colour codedin the network window for clarity

PIPE SIZING AND CLASSES

New or replacement piping can easily be sized using anycombination of four sizing criteria, namely maximumvelocity, mach number, Density x Velocity

2 and maximum

pressure.

Since the pipe wall thickness / schedule selection is basedon piping class definitions, there is no need to enter anextensive amount of tabular data for schedules.

The easy to set up piping classes provide an accuratealternative selection of pipe which can be overruled at thefinal design stages with project schedules if they differ.This has a substantial benefit to fast-track and especiallyproject phases prior to final design when piping schedulesare rarely available until the project is well under way.

PHYSICAL PROPERTIES

Flaretot has a built in physical property calculator with 310library components. Library components can be locatedeasily using name/synonyms, formula or CAS number.

The Peng-Robinson equation of state together with APImethods for enthalpy are used to provide an realisticestimates of fluid properties and vapour liquid equilibriathroughout the network.

Further components can be added on request. Petroleumfractions and components not in the library can be definedas user components.

The flexible user component designer allows the user tohave full control over user component definition. BothPetro and Joback group contribution methods are providedand any combination of these methods can be used,including specification of any properties known.

Liquid temperature dependent data (such as viscosity) canbe calibrated with known data where available and data ispresented in chart form to provide the user with an insightinto the predicted data to help prevent inaccurate dataentry.

The Joback group contribution method is presented in aclear diagrammatic form so that the user is clear on thegroup contributions.

© 2012 Flaretot Ltd

THE FLARETOT CALCULATION MODULES

FLARE RADIATION MODULE

The flare radiation model draws data directly from the flarenetwork simulation, so no further flare feed stream dataentry is necessary. Combined radiation from all (or userselected) flares is modelled using a choice of three modelsfor the flame profiles. These flame profiles are generatedusing a multi-point model of up to 100 points (userselectable) to ensure the highest level of accuracy for thecalculated radiation.

As well as radiation at specified coordinates, radiationcontour plots can be generated using customisableradiation levels. The use of actual rather than relative flarecoordinates and wind direction allow for easy overlay ofthese plots on a plot plan.

Flare stack sizing is also provided based on maximumradiation requirements.

FLARE STACK DISPERSION MODULE

The dispersion module calculates pollutant concentrationsresulting from a single flare stack for either flame out orflared conditions. Four user selectable models may beused, (Sutton, Bosanquet & Pearson, API or ASME).

Contour plots and tables are generated in real coordinatesand reporting includes maximum pollutant concentrationsand the variation of concentration with wind speed.

VESSEL BLOWDOWN MODULE

The blowdown module uses a rigorous component propertyand phase model combined with unsteady state wall andinsulation heat conduction to predict conditions duringvessel depressurising. Blowdown of vertical, horizontal andspherical vessels can be modelled. Rigorous restrictionorifice flowrate calculations are used rather than genericpressure / flowrate equations so that simulated conditionsare as realistic as possible.

Both fire conditions and normal blowdown conditions aresupported.

A small library of metal and wall temperature dependentproperties for the metal wall and insulation is provided tominimise data input required.

Extensive feedback on the blowdown calculation is given inchart form to aid in reaching a viable solution with aminimum of complete and possibly unfeasible runs.

Comprehensive output is given in chart and tabular form.

Metal wall stress calculations are included to allow arealistic assessment of possible wall rupture duringblowdown.

The wall stress calculated during blowdown is overlaid onthe material allowable stress chart, so it is clear whereallowable stress may be exceeded.

A library of allowable stress for various materials underASME VIII Sect 1 is provided so that data input isminimised (but may be entered in tabular form if required).

© 2012 Flaretot Ltd

MODULE FOR RADIATION EFFECTS ON STRUCTURAL STEEL

This module predicts the temperature rise with time of atubular structural steel element resulting from flareradiation.

A rigorous four quadrant model is used to calculate allaspects of heat transfer namely, radiant, conductive andconvective (forced and natural convection).

Results are presented in both chart and comprehensivetabular form which includes calculated coefficients.

Required heat transfer coefficients and related air physicalproperties required are calculated internally so requiring aminimum of user input.

Full control over coefficient calculation choices is alsoprovided to give maximum flexibility in meeting project orcompany standards of calculation.

PRODUCED NOISE MODULES

There are three noise modules covering noise produced byflares, control valves and piping.

RELIEF VALVE SIZING AND RELIEF LOAD MODULE

The relief module comprises a number of templates forrelief load / relief valve sizing based on a spreadsheet typeinput. These include fire, thermal expansion, gas blow-byand tube rupture.

Multiple calculations may be maintained in a single networkfile.

KNOCK OUT DRUM SIZING MODULE

The knockout drum sizing module allows sizing for bothvertical and horizontal vessels.

FLARE SYSTEM PURGE RATE MODULE

The purge rate module allows required flare network purgerates to be calculated using 3 methods (Husa, Tan andalternative modified methods).

PHYSICAL PROPERTY CALCULATOR MODULE

The integral physical calculator module can also be usedfor a specific composition to perform a flash calculation andgenerate additional physical properties at a specifiedtemperature and pressure.

17 mixture properties and 8 vapour / liquid properties aregenerated.

UNIT CONVERSION MODULE

Aside from the ability to select custom units for the flare network, Flaretot also offers a unit conversion module coveringconversion from a wide range of other units.