Validation of discharge and atmospheric dispersion for unpressurised and pressurised carbon dioxide releases

Autor: Jan Stene, Adeyemi Oke, Henk W.M. Witlox, Mike Harper
Rok vydání: 2014
Předmět:
Zdroj: Process Safety and Environmental Protection. 92:3-16
ISSN: 0957-5820
DOI: 10.1016/j.psep.2013.08.002
Popis: This paper discusses the validation of discharge and subsequent atmospheric dispersion for both unpressurised and pressurised carbon dioxide releases using the consequence modelling package Phast. The paper first summarises the validation of the Phast dispersion model (UDM) for unpressurised releases. This includes heavy gas dispersion from either a ground-level line source (McQuaid wind-tunnel experiments) or an area source (Kit-Fox field experiments). For the McQuaid experiments minor modifications of the UDM were made to support line sources. For the Kit Fox experiments steady-state and 20-s finite-duration releases were simulated for both neutral and stable conditions. Most accurate predictions of the concentrations for finite duration releases were obtained using the UDM Finite Duration Correction method. Using experiments funded by BP and Shell and made available via DNV's CO2PIPETRANS JIP, the paper secondly summarises the validation of the Phast discharge and dispersion models for pressurised CO2 releases. This modelling accounted for the possible presence of the solid CO2 phase following expansion to atmospheric pressure. These experiments included both high-pressure steady-state and time-varying cold releases (liquid storage) and high-pressure time-varying supercritical hot releases. Both the flow rate and the concentrations were found to be predicted accurately. The above validation was carried out with no fitting whatsoever of the Phast extended discharge and dispersion models.
Databáze: OpenAIRE
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