Improved modelling of mixtures
The Phast and Safeti Multi Component (MC) extension provides improved consequence and risk results for mixtures compared with the traditional “pseudo-component” (PC) approach.
In the “pseudo-component” approach the composition, thermodynamic behaviour and properties of a mixture are calculated using simple averaging equations, whereas in the multi component approach modelling of mixtures involves more rigorous enhancements to the physical property system.
The Multi Component extension supports the core steady-state discharge models, dispersion modelling via the unified dispersion model (UDM), and the standalone multi component pool vapourisation modelling.