Gap Analysis of CFD Modelling of Accidental Hydrogen Release and Combustion

摘要: Hydrogen is expected to play an important role in the energy mix of a future lowcarbonsociety, as it stated European Strategic Energy Technology Plan ofthe Commission (COM 2007 - 723) and Hydrogen, Fuel Cells &Infrastructure Technologies Program-Multi-Year Research, Development, andDemonstration USA Department (DoE 2007).Hydrogen safety issues have be addressed order demonstrate that widespread deployment use hydrogen fuel cell technologies can occur withthe same or lower level hazards associated risk compared theconventional fossil technologies. Computational Fluid Dynamics (CFD) isconsidered one tools investigate related production,storage, delivery hydrogen. CFD techniques provide wealthyamount information on dynamics hypothetical accident itsconsequences. The CFD-based consequence analysis then used riskassessments. In this context workshop was organised at Institute for Energy(JRC) Petten, Netherlands with purpose identifying gaps inCFD modelling release combustion. report describes themain findings workshop.A occurs usually following typical sequence events: anunintended release, mixing air form flammable mixture,the ignition cloud depending conditions, fire anexplosion (deflagration or/and detonation). For each stages accident, thecritical been identified prioritised.Beyond specific are described accidentstage report, some general found all stages:• lack extensive validation codes/models covers therelevant range conditions accidentscenarios e.g. terms geometrical lay-out, leak flow rates, etc.• protocol like exists LiquefiedNatural Gas (LNG): Model Evaluation Protocols (MEP) assessmentof models consequences, guidance evaluating interms scientific assessment, verification validation.• database experiments models.• cases, complete accurate experimental data CFDvalidation.