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Relative analysis

Relative analysis. Simulation. Relative analysis. Subway Environment Simulation (SES) SES 2000 One Dimensional Analysis Aerodynamic and thermodynamic Freight rail projects Moffat Mount Shaughnessy Mount Macdonald/Rogers Pass Mullan Stampede Pass. Relative analysis. Model inputs.

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Relative analysis

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  1. Relative analysis Simulation

  2. Relative analysis • Subway Environment Simulation (SES) • SES 2000 • One Dimensional Analysis • Aerodynamic and thermodynamic • Freight rail projects • Moffat • Mount Shaughnessy • Mount Macdonald/Rogers Pass • Mullan • Stampede Pass

  3. Relative analysis

  4. Model inputs Relative analysis • Tunnel geometry • Friction factor • Calibration

  5. Relative analysis • Locomotive data • Field test data (Other projects) • CFD Simulations (Computational fluid dynamics) • Past experience • Locomotive input • Heat release • Emission rates • Derating

  6. Relative analysis Input constant speed

  7. Relative analysis Simulation – Inputs and outputs • Input constant speed • Relative airflow to locomotives • Quantity • Quality

  8. ResultsLead Loco, Relative Airflow airflow Worst-case grain 19 kph (12 mph) Double stack 24 kph (15 mph)

  9. ResultsLead Loco, Relative Airflow airflow Worst-case grain 19 kph (12 mph) Double stack 24 kph (15 mph) Double stack 28 kph (17.5 mph) Double stack 32 kph (20 mph)

  10. ResultsMid loco consist, relative airflow Worst-case grain 19 kph (12 mph) Double stack 24 kph (15 mph)

  11. ResultsMid loco consist, relative airflow Worst-case grain 19 kph (12 mph) Double stack 24 kph (15 mph) Double stack 28 kph (17.5 mph) Double stack 32 kph (20 mph)

  12. Naturally ventilated tunnels Train performance in tunnel

  13. Results

  14. Results • Double stack at 15 mph • Relative airflow less • 3D effects unknown • All other factors better • Double stack at 17.5 mph • All factors better

  15. Agenda • What is a long tunnel? • Naturally ventilated tunnels • Notched tunnel • Relative analysis • Results • Conclusions • A Tunnel: Monitor speeds less than 24 kph (17.5 mph) • Limits in naturally ventilated tunnel

  16. Questions? Justin Edenbaum Justin@presentationengineer.com What is a long tunnel? Naturally ventilated tunnels Notched tunnel Relative analysis Results Conclusions

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