A novel modular designing for multi-ring flywheel rotor to optimize energy consumption in light metro trains

Sina Rastegarzadeh, Mojtaba Mahzoon and Hossein Mohammadi

Energy, 2020, vol. 206, issue C

Abstract: In this paper, a multi-ring flywheel rotor is chosen as a basic module for modular designing an optimized energy storage system to reduce the energy consumption in light metro trains by finding the best capacity and the number of optimized-flywheel rotor module for each train car. After finding the adequate capacity and optimizing the geometric characteristics of rotor rings, the effect of using the modular Flywheel energy storage system (FESS) on reducing the energy consumption of light urban trains is investigated. Four different rotors with various energy storage capacities are chosen, so that results can be used for a wide range of light trains with a power demand range of 1620–3420 kW. In the optimization algorithm, the energy per unit volume is considered as the cost function. The presented general modular designing is examined for Shiraz urban train system by using real-time speed and acceleration data. A three-layer flywheel with an energy storage capacity of 500W.h serves as a practical example. Finally, the effects of the number of passengers, peak, and off-peak hours in the energy storage capacity of the system are also studied. Using 15-FESS modules results in 35.1% energy saving for this line.

Keywords: Energy saving; Regenerative brake; Modular design; Optimization; Multi-ring flywheel; Light train (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:206:y:2020:i:c:s0360544220311993

DOI: 10.1016/j.energy.2020.118092

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