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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 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 • Diesel locomotives in tunnels
Diesels in tunnels • Diesel locomotives in tunnels • Relative airflow
Diesels in tunnels Diesel locomotives in tunnels Relative airflow Next locomotives
Diesels in tunnels Diesel locomotives in tunnels Relative airflow Next locomotives Decrease in performance
Naturally ventilated tunnels Train performance in tunnel
Agenda Diesels in tunnels Notched Tunnel Relative Analysis Results Conclusions
Notched tunnel California Nevada • A Tunnel • Location (map) • 3,460 meters long (~2 miles) • 1.65% uphill grade East to West
Notched tunnel • Double stack operations • Notch roof
Agenda Diesels in tunnels Notched Tunnel Relative Analysis Results Conclusions
Relative analysis • Worse-case, grain train • Length ~2km (1.2 miles) • Lead, mid, end consist (3x3x1) • Minimum entering speed 19.3 kph (12mph)
Relative analysis • Double stack, design case • Length ~4km (2.5 mile) • Lead, mid consist • Simulated speed 24 km (15 mph)
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 Simulation
Agenda Diesels in tunnels Notched Tunnel Relative Analysis Results Conclusions
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
Agenda • Diesels in tunnels • Notched Tunnel • Relative Analysis • Results • Conclusions • Case study: Monitor speeds less 17.5 mph • Consider tunnel operations