Modelling of LNG Pool Spreading on Land with Included Vapour-Liquid Equilibrium and Different Boiling Regimes

摘要: This paper presents a source term model for estimating the rate of unconfined LNG pool spreading on land. The takes into account composition changes boiling mixture, variation thermodynamic properties due to preferential in liquid mixture and effect regime conductive heat transfer. heat, mass momentum balance equations were solved continuous instantaneous spills. A sensitivity analysis was conducted determine relative each these phenomena spreading. compared commonly used gravityinertia integral pool-spreading with one-dimensional 1. Introduction Although some models have been developed as outlined by Webber et al. (2010), most them are based work carried out early 1970’s non-volatile These tend overlook complexity associated cryogenic Cryogens (e.g. LNG: point = -162 °C) exhibit vigorous upon being released land or water at ambient temperature. In case an release, will flash while rest spread very quickly. conditions transfer from surroundings may affect vaporization rate. Most current modelling spillage estimates either using fixed thermo-physical those pure methane analogue. is questionable since behaviour different that fluid boil-off lighter hydrocarbons, which turn results time varying spilled mixture. complex governing be accounted their importance must understood develop comprehensive both adaptable applicable variety scenarios. this paper, modes well thermodynamics vapour equilibrium effects proposed. identify parameters process. incorporates multicomponent nature its spill aim developing accurate representation