Flaresim 2024

نوشته شده توسط Super User. ارسال در مهندسی نفت و مخزن

Flaresim 2024.1 is a computer program designed to assist professional engineers in the design and evaluation of flare systems. The program calculates the thermal radiation, thermal dose and noise generated by flares and estimates the temperatures of exposed surfaces. It also performs dispersion analysis of the combustion gases or relieved fluid in flame out conditions. Flaresim provides a user friendly interface with program actions accessed by menu and toolbar options. Data entry is through a series of data views controlled from an overall Case Navigator view. Context sensitive help is available at all points to assist the user in the use of the program and selection of appropriate design parameters.

 

 

Output from the Flaresim is highly customisable with the user having the freedom to select summary or detailed output. The reports also include graphical output where appropriate. Experienced flare system engineers should read the remainder of this chapter for an overview of the way that Flaresim performs calculations. They may then find that they will be able to use the program with assistance from the help system without further reference to the manual. However we would advise study of the manual to become familiar with the full range of options and recommendations for using the program.

Engineers new to flare system design should work through the examples in the Getting Started section of the manual after first reading this chapter. The examples provide a step by step guide to using Flaresim for flare system design and highlight some of the critical parameters that must be determined.

Features

The following features highlight the main capabilities of Flaresim:

• Equally applicable to the design of flare systems for offshore platforms, gas plants, refineries and chemical plants.

• Data may be entered and reported in the users choice of units and may be converted at any time.

• Correlations are available for modelling a range of flare tips including sonic tips, pipeflare tips and steam or air assisted tips. For assisted flares the quantity of steam or air required for smokeless operation can be calculated.

• A number of correlations are provided to predict the fraction of heat radiated from flames of a range of hydrocarbon fluids with different types of flare tip.

• Liquid flaring systems can be handled.

• A wide range of algorithms for calculation of thermal radiation. These include the McMurray integrated multipoint methods and the Chamberlain (Shell) method in addition to the Hajek/Ludwig and Brzustowski/Sommer methods which are described in the API guidelines for flare system design.

• Full three dimensional flame shape analysis with complete flexibility in specification of the location and orientation of multiple stacks.

• Thermodynamic flash routines from NIST to calculate change in fluid properties with pressure.

• Dynamic calculation option to evaluate results as flare flows vary with time.

• Calculation of thermal radiation dose received over a period of time.

• Case study manager to allow multiple comparative results to be generated within a single Flaresim model.

• Calculation of combustion gas composition.

• Calculation of purge gas flows required for tips.

• Jet dispersion model to analyse flammable gas concentrations close to flare in flame out conditions.

• Gaussian dispersion model to analyse longer distance dispersion of the relieving fluid or combustion gases.

• A range of options for defining and analysing the noise spectrum generated by flare systems including user defined spectra.

• Ability to define multiple environmental scenarios to allow rapid evaluation of flare system performance under different wind speeds and directions.

• Multiple stacks/booms each accommodating multiple flare tips.

• Calculation of radiation, noise spectrum and surface temperatures at multiple receptor points.

• Calculation of radiation variation with wind direction and speed at a point and display of results on a wind rose chart.

• Ability to define multiple receptor grids in multiple planes for calculation of radiation, noise or surface temperatures.

• Plotting of grid results as isopleth contours for sterile area definition.

• Receptor point characteristics for calculating surface temperatures include mass, absorptivity, emissivity, area, specific heat, orientation and initial temperature.

• Option to define local environmental conditions at receptor points for calculating temperatures.

• Sizing and rating of knock out drums.

• Sizing and rating of seal drums

• Modelling of water curtains or solid shields to reduce radiation and noise transmission.

• Sizing of stack or boom length to meet radiation, noise or surface temperature limits at defined receptor points.

• Sterile area calculations to allow the safe distance from flare stack at different radiation limits.

• A setup wizard to allow new users to set up an initial model rapidly with appropriate defaults.

• Graphical overlay setup wizard to allow rapid integration of plot plans with isopleth results.

• Expert mode to control access to less commonly used options.

• Import of files from Flaresim 2.0 and later.

• Multiple reports can be created and compared as updates are made to a model and the data corresponding to any report can be saved.

• Quality Assurance options are included in the reports.

• Customisable HTML reports

• Customisable graphic reports

• Multiple Flaresim cases can be open at the same time.

 

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