Energy Use of Subway Networks in the Sustainability era Sybil Derrible, Ph.D. Candidate, [email protected]Department of Civil Engineering, University of Toronto CORS-INFORMS International Conference – Toronto ON 1 CORS INFORMS International Conference Toronto, ON June 15, 2009
26
Embed
Derrible S - Energy Use of Subway Networks in the Sustainability …users.encs.concordia.ca/~awasthi/CORSINFORMS2009/Derrible... · 2009. 6. 25. · Mexico City 2500.00 3000.00 m
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Energy Use of Subway Networks in the Sustainability era
Sybil Derrible, Ph.D. Candidate, [email protected] of Civil Engineering, University of Toronto
CORS-INFORMS International Conference – Toronto ON
1
CORS INFORMS International Conference Toronto, ONJune 15, 2009
Rationale
Current Work: Networks Effects – Coverage, Directness, Connectivity
- In the battle towards reducing GHG emissions, cities are of paramount importance (Copenhagen climate conference, December 2009)
- Transportation is one of the core issues
- Due to their environmental benefits, public transit systems are likely to grow
It i l th t bli t it i t ft i t ll t i bl- It is clear that public transit is most often more environmentally sustainable than private automobiles, but:
What is the impact of network growth on energy use of
subway networks?
4
Framework
What does energy use mean?- A larger network will emit more because it carries more riders, is it more sustainable or less?sustainable or less?
- If we account for passengers: should we use energy per ride (boarding) or per passenger kilometres travelled (PKT)?
- Note: talk about energy use, not emissions of tCO2e because the energy grid is not known, and does not add information about the sustainability of subway networks
Energy-use per PKT (MJ/PKT) Streetcar LRT Subway Commuter Rail Toronto 0.31 0.69 0.96 Montreal 0.41 2.25 Ottawa Calgary 0.25 Vancouver 0.38 0.73 European Avg 0.58 0.69 0.48 0.87 North-American Avg 0.65 0.60 0.60 1.37
5
→ prefer to use energy use per ride (total boardings or boardings per capita)
Framework
What directly influences energy use?
- Size of the network (route length)
Tokyo (292km) vs. Toronto (69km)
- Number of operating subway/metro units (wagons)
London (3900) vs. Athens (216)
- Vehicle Technology
6
Framework
How to use network characteristics- Absolute Values (as collected)
City Route length (km) Metro UnitsToronto 68.747 641.98Montreal 60.858 758.99….. ….. …..
Subway
- Relative Values (route length by population, metro units by population)PKT per track-km
Streetcar LRT Subway Commuter Rail Toronto 13,309,671 15,364,738 1,969,227 Montreal 42,702,148 966,966 Ottawa 3,369,765 Calgary 10,007,934 V 19 130 976 800 175