A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Modeling of evaporation of hydrogen during accidental releases
Hopefully, in the near future, liquid hydrogen will be commonly utilized as energy. The cleanest fuel that the primary limit of producing and using it, is safety issues. High possibility safety issues are generated by large amounts of hydrogen, usually stored and transported in the liquid phase. The first phase in developing many accident cycles that end to a significant hazard (e.g., from fire, explosion, and toxic effects) is the discharge of hazardous cryogenic liquids from its container and its evaporation (e.g., liquid hydrogen release), leading to producing dangerous vapor. The main objective of this study is to model this evaporation from the release of liquid hydrogen. The evaporation model is a function of the radius of the spreading pool on the surface. Thus, for modeling the evaporation, the spreading pool on the surface should also be modeled. Different integral models have been utilized for simulating the spread and vaporization of liquid hydrogen pool, namely Briscoe and Shaw’s (B&S), Constant Froude Number (CFN), and a simplified model of Gas Accumulation over Spreading Pool (GASP). The simplified GASP model is suitable for indoor spills, but since the dominant heat transfer in ambient is heat flux by conduction from the ground, this model is also used to model the evaporation of liquid hydrogen for outdoor releases. For using spreading and evaporation models, basic knowledge about heat transfer and boiling regimes is required. The boiling regime of hydrogen is essential to determine and specify in detail. Knowledge about the characteristics of heat transfer of hydrogen pool boiling alongside assembling consistent correlations to monitor the boiling heat transfer analysis is essential to the utilization of liquid hydrogen (LH2). Some correlations seeking at various boiling regimes are assessed or adjusted in order to understand the mathematical assessment of hydrogen boiling heat transfer. Several developed correlations for nucleate boiling, critical heat flux (CHF), and minimum heat flux ...
Modeling of evaporation of hydrogen during accidental releases
Hopefully, in the near future, liquid hydrogen will be commonly utilized as energy. The cleanest fuel that the primary limit of producing and using it, is safety issues. High possibility safety issues are generated by large amounts of hydrogen, usually stored and transported in the liquid phase. The first phase in developing many accident cycles that end to a significant hazard (e.g., from fire, explosion, and toxic effects) is the discharge of hazardous cryogenic liquids from its container and its evaporation (e.g., liquid hydrogen release), leading to producing dangerous vapor. The main objective of this study is to model this evaporation from the release of liquid hydrogen. The evaporation model is a function of the radius of the spreading pool on the surface. Thus, for modeling the evaporation, the spreading pool on the surface should also be modeled. Different integral models have been utilized for simulating the spread and vaporization of liquid hydrogen pool, namely Briscoe and Shaw’s (B&S), Constant Froude Number (CFN), and a simplified model of Gas Accumulation over Spreading Pool (GASP). The simplified GASP model is suitable for indoor spills, but since the dominant heat transfer in ambient is heat flux by conduction from the ground, this model is also used to model the evaporation of liquid hydrogen for outdoor releases. For using spreading and evaporation models, basic knowledge about heat transfer and boiling regimes is required. The boiling regime of hydrogen is essential to determine and specify in detail. Knowledge about the characteristics of heat transfer of hydrogen pool boiling alongside assembling consistent correlations to monitor the boiling heat transfer analysis is essential to the utilization of liquid hydrogen (LH2). Some correlations seeking at various boiling regimes are assessed or adjusted in order to understand the mathematical assessment of hydrogen boiling heat transfer. Several developed correlations for nucleate boiling, critical heat flux (CHF), and minimum heat flux ...
Modeling of evaporation of hydrogen during accidental releases
Afzali, Mojtaba (author) / Gaathaug, André Vagner / Vågsæther, Knut / Hansen, Per Morten
2021-01-01
Theses
Electronic Resource
English
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