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Flaresim is a computer program designed to assist professional engineers in the design and evaluation of flare systems. The program calculates the thermal radiation and noise generated by flares and estimates the temperatures of exposed surfaces.
The following features highlight the main capabilities of Flaresim.
- Equally applicable to the design of flare systems for offshore oil 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 steam and air 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 wide 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. This include integrated multipoint methods in addition to both the Hajek/Ludwig and Brzustowski/Sommer methods which are presented within 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.
- 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 which can each have multiple flare tips.
- Calculation of radiation, noise spectrum and surface temperatures at multiple receptor points. Receptor point characteristics for calculating surface temperatures include mass, absorbtivity, emissivity, area, specific heat, orientation and initial temperature.
- Calculation of radiation variation with wind direction and speed at a point and display of results on a wind rose chart.
- Sizing of stack or boom length to meet radiation, noise or surface temperature limits at defined receptor points.
- Ability to define multiple receptor grids in multiple planes for calculation of radiation, noise or surface temperatures.
- Receptor point characteristics for calculating surface temperatures include mass, absorbtivity, emissivity, area, specific heat, orientation and initial temperature.
- Modelling of water curtains or solid shields to reduce radiation and noise transmission.
- Plotting of grid results as isopleth contours for sterile area definition.
- A setup wizard to allow new users to set up an initial model rapidly with appropriate defaults.
- Import of files from previous DOS version of Flaresim.
- Quality Assurance options are included in the report generation.
The wide range of calculation options available within Flaresim may lead to the possibility of selecting inappropriate correlations for a particular combination of fluid type and flare system configuration. While we have tried to prevent the use of the move obvious problems we have tried to allow flexibility for “one off” situations. As with all engineering computer software, Flaresim is a tool which should not be expected to replace sound engineering judgement.
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