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    Title: 1、Some Explosion Incidents and Related Research

              2、Electro-thermal modelling of lithium-ion battery packs from the safety perspective

    Time：10AM, Oct 12th

    Place：F210, School of Mechanical Engineering
    Speaker：WENG Xiaoling,Professor
    Host：ZHAO Changying,Professor
    
Abstract：

    Some Explosion Incidents and Related Research

    This presentation will start with a brief review of some major industrial incidents in recent years. It will describe in particular the Buncefield fuel depot explosion on 11 December 2005, which resulted in the largest fire in Europe since World War II. Although these incidents are normally of low frequency, i.e. they do not happen very often, they generally have high consequences in terms of property loss, disruption and in some cases human injuries and casualties.  Their unusually “high frequency” over the past decade have triggered major investigations by industry and regulators. An overview of these investigations will be provided. This will be followed by research conducted by my own group in these contexts, including fuel cascade, detonation of pancake shaped clouds, explosion modelling, deflagration to detonation transition (DDT) and Liquefied Natural Gas (LNG) pool fires. These research activities are almost exclusively based on Computational Fluid Dynamics (CFD) techniques and combustion modelling, while published laboratory scale experimental data and proprietary large scale test data conducted by our collaborators in industry have been used for model verification and validation. 

    Substantial amount of efforts have been devoted to developing physics based sub-models within the frame of open source CFD code OpenFOAM®. The ultimate goal is to advance our understanding of the underlying physical and chemical processes in these incidents and provide validated predictive tools, which can be used for consequence analysis and development of safety cases in the petrochemical industry. 

    
    Electro-thermal modelling of lithium-ion battery packs from the safety perspective

    This presentation will report on the ongoing collaboration between Warwick FIRE at University of Warwick in the United Kingdom and the State Key Laboratory for Fire Science (SKLFS) in the University of Science and Technology, China. The funding for Warwick FIRE is provided by the Incoming International Fellowship Programme of the European Commission’s MARIE SKŁODOWSKA-CURIE ACTIONS (Project No. 656582). The SKLFS is funded by the CAS-EU Partner Programme – Chinese H2020 Matching Fund from CAS (211134KYSB20150004).

    The collaborative project aims to develop a predictive tool, which will be generic across all LIB types for lithium-ion battery (LIB) thermal management from the safety perspective. Such a tool can aid the development of safer LIB cells and the optimisation of LIB packs balancing performance and safety requirement. The specific objectives of the research include:
 
    Develop and validate a thermal model to predict the onset of runaway reactions;
  Extend the above model to predict potential ignition;
  Extend the model to predict possible escalation from cell ignition to pack fire and explosion;  
  Conduct laboratory tests to provide input data for the model and data for model validation;
  Validate the model with full scale test data giving particular emphasis to cell rupture and the propensity from ignition of a single cell to battery packs; 
  Conduct cases studies to formulate recommendations on LIB safety.

    The presentation will outline the ongoing development at Warwick FIRE. It will also present snapshots of previous experimental data from SKLFS which will be used to provide the heal release rate in the model as well as the new measurements dedicated to support the model development work at Warwick FIRE, which are being carried out in SKLFS.