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Literature Review and Simulation Study of Depressurization of Pressure Vessels

Literature Review and Simulation Study of Depressurization of Pressure Vessels. By: Sigve Karolius Supervisors: Tore Haug Warberg & Geir Berge . Depressurization Trajectory. Pressure Profile Temperature Profile Mass Efflux Thermodynamic Processes. Physical Mechanisms.

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Literature Review and Simulation Study of Depressurization of Pressure Vessels

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  1. Literature Review and Simulation Study of Depressurization of Pressure Vessels By: SigveKarolius Supervisors: Tore HaugWarberg & Geir Berge

  2. Depressurization Trajectory • Pressure Profile • Temperature Profile • Mass Efflux • Thermodynamic Processes

  3. Physical Mechanisms • Heat Transport • From surroundings to surface • Through Wall • Into and Between Phases • Mass Transport • Between Phases • Out of Vessel • Mechanical Stress • Three Dimensions

  4. Software Development • Fire Engulfment • Mechanical Stress • Thermodynamic Calculations • Numerical Increments

  5. Time or Pressure Increments • Pressure saves one flash calculation • Time can deal with positive and negative pressure variations

  6. Experiment Data • Few experiments • Expensive • Dangerous • Experimental data lacks vital parameters • Valve Properties • Fluid Composition • Difficult to measure, especially under fire conditions

  7. Cold Blowdownof Nitrogen

  8. Cold Blowdownof LPG

  9. Cold Blowdownof LPG

  10. Fire Engulfed LPG

  11. Conclusion • Complex process to model • Interacting and competingmechanisms • Thermodynamic • Purchaseand Safetybenefits • Determine nessecity for expencive alloys • Dimension

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