A combined fluid-dynamic and thermodynamic model to predict the onset of rapid phase transitions in LNG spills
| Autor: | Eskil Aursand, Peder Aursand, Eirik Holm Fyhn, Øivind Wilhelmsen, Gunhild Allard Reigstad, Hans Langva Skarsvåg, Åsmund Ervik, Magnus Aashammer Gjennestad, Jabir Ali Ouassou, Morten Hammer, Karl Yngve Lervåg |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Phase transition
Work (thermodynamics) Scale (ratio) General Chemical Engineering Rotational symmetry FOS: Physical sciences Energy Engineering and Power Technology 02 engineering and technology Management Science and Operations Research Industrial and Manufacturing Engineering 020401 chemical engineering Position (vector) 0502 economics and business Range (statistics) 050207 economics 0204 chemical engineering Safety Risk Reliability and Quality 05 social sciences Fluid Dynamics (physics.flu-dyn) Physics - Fluid Dynamics Mechanics Rapid phase transition Control and Systems Engineering Environmental science Food Science Liquefied natural gas |
| Zdroj: | Journal of Loss Prevention in the Process Industries |
| Popis: | Transport of liquefied natural gas (LNG) by ship occurs globally on a massive scale. The large temperature difference between LNG and water means LNG will boil violently if spilled onto water. This may cause a physical explosion known as rapid phase transition (RPT). Since RPT results from a complex interplay between physical phenomena on several scales, the risk of its occurrence is difficult to estimate. In this work, we present a combined fluid-dynamic and thermodynamic model to predict the onset of delayed RPT. On the basis of the full coupled model, we derive analytical solutions for the location and time of delayed RPT in an axisymmetric steady-state spill of LNG onto water. These equations are shown to be accurate when compared to simulation results for a range of relevant parameters. The relative discrepancy between the analytic solutions and predictions from the full coupled model is within 2% for the RPT position and within 8% for the time of RPT. This provides a simple procedure to quantify the risk of occurrence for delayed RPT for LNG on water. Due to its modular formulation, the full coupled model can straightforwardly be extended to study RPT in other systems. 22 pages, 11 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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