Guiding the Selection and Application of Wayside Energy Storage Technologies for Rail Transit and Electric Utilities (2010) / Chapter Skim
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Pages 30-33
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Guiding the Selection & Application of Wayside Energy Storage Technologies for Rail Transit and Electric Utilities Transit Cooperative Research Program Transportation Research Board Page 28 of 61 6 Economic Measures of Benefit In addition to providing voltage support as demonstrated in the simulation results, an ESD installation can also help capture more regenerative braking energy that may be otherwise wasted. A direct benefit of recovering braking energy is the energy cost saving.
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Guiding the Selection & Application of Wayside Energy Storage Technologies for Rail Transit and Electric Utilities Transit Cooperative Research Program Transportation Research Board Page 29 of 61 This table also illustrates that an ESD installation at the A4X location can help improve the system-wide energy saving ratio, expressed in per cent. Without the ESD, the energy saving ratio is 29.9%.
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Guiding the Selection & Application of Wayside Energy Storage Technologies for Rail Transit and Electric Utilities Transit Cooperative Research Program Transportation Research Board Page 30 of 61 specifically, returning to Table 6–2, the following 24-hour train operation schedules are assumed: • 5 minutes in peak hours (6-10AM and 4-8PM) • 15 minutes in off-peak hours and weekends • No train service between 1AM and 4AM on any day Using actual published electricity tariffs from a USA utility company[3]
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From page 33... ...
Guiding the Selection & Application of Wayside Energy Storage Technologies for Rail Transit and Electric Utilities Transit Cooperative Research Program Transportation Research Board Page 31 of 61 Table 6-4 Summary of Cost Savings in 10 Years Total Energy Cost Saving Over 10 Years (Assuming 5% Annual Increase) Year Yearly Cost Savings (US$)
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