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Predicting new double-stack operations in a naturally ventilated tunnel

Predicting new double-stack operations in a naturally ventilated tunnel. Presented by: Justin Edenbaum Co-author: Not listed. Agenda. Diesels in tunnels Notched Tunnel Relative Analysis Results Conclusions. Diesels in tunnels. Diesel locomotives outside. Diesels in tunnels.

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Predicting new double-stack operations in a naturally ventilated tunnel

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  1. Predicting new double-stack operations in a naturally ventilated tunnel Presented by: Justin Edenbaum Co-author: Not listed

  2. Agenda Diesels in tunnels Notched Tunnel Relative Analysis Results Conclusions

  3. Diesels in tunnels • Diesel locomotives outside

  4. Diesels in tunnels • Diesel locomotives in tunnels

  5. Diesels in tunnels • Diesel locomotives in tunnels • Relative airflow

  6. Diesels in tunnels Diesel locomotives in tunnels Relative airflow Next locomotives

  7. Diesels in tunnels Diesel locomotives in tunnels Relative airflow Next locomotives Decrease in performance

  8. Naturally ventilated tunnels Train performance in tunnel

  9. Agenda Diesels in tunnels Notched Tunnel Relative Analysis Results Conclusions

  10. Notched tunnel California Nevada • A Tunnel • Location (map) • 3,460 meters long (~2 miles) • 1.65% uphill grade East to West

  11. Notched tunnel

  12. Notched tunnel • Double stack operations • Notch roof

  13. Agenda Diesels in tunnels Notched Tunnel Relative Analysis Results Conclusions

  14. Relative analysis • Worse-case, grain train • Length ~2km (1.2 miles) • Lead, mid, end consist (3x3x1) • Minimum entering speed 19.3 kph (12mph)

  15. Relative analysis • Double stack, design case • Length ~4km (2.5 mile) • Lead, mid consist • Simulated speed 24 km (15 mph)

  16. 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

  17. Relative analysis Simulation

  18. Agenda Diesels in tunnels Notched Tunnel Relative Analysis Results Conclusions

  19. Results

  20. Results • Compared to grain train at 12 mph: • Double stack at 15 mph • Relative airflow less • 3D effects unknown • All other factors better • Double stack at 17.5 mph • All factors better

  21. Agenda • Diesels in tunnels • Notched Tunnel • Relative Analysis • Results • Conclusions • Case study: Monitor speeds less 17.5 mph • Consider tunnel operations

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