THE MODELING OF POOL VAPORIZATION

This paper describes a mathematical model which calculates the time de pendencies of the flow rate and composition of the vapour emerging fro m a pool. A large variety of accidental cases can be covered: continuo us or instantaneous spills, on confined or unconfined ground, ideal or non-ideal liquid mixtures in boiling or evaporating conditions. The b oiling, when present, is modelled through an equation system comprisin g the Rachford-Rice relation and the energy balance of the pool, which is assumed to be well-mixed. In the case of a volatile pool, interfac ial mass rates are determined taking into account the Stefan flux, and the thermal resistance inside the liquid phase is also considered. In ail situations, the energy balance includes the contribution of groun d, sun and air. Known experimental data have been used to validate the model.