Compatible alternative energy storage systems for electric vehicles: Review of relevant technology derived from conventional systems

El Bakkari, Fatima; Mounir, Hamid

doi:10.1016/j.energy.2023.129775

Cited by 6 publications

(2 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Whether they are the the application requirement for a stand-alone FESS or an array of a plurality of FESS, the characteristics of the application environment impose requirements on the FESS such as storage capacity, available free space to accommodate the flywheel system, and weight. The dominant indicators for the various solutions are high energy density (kJ/kg) and total stored energy (kJ) [18][19][20][21]. Rupp et al [18] studied the use of flywheels in light rail transit.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Optimization of Flywheel Rotor Energy and Stability Using Finite Element Modelling

Coppede,

da Silva Bortoli,

Moreira

et al. 2024

Energies

View full text Add to dashboard Cite

An investigation on a flywheel is presented based on finite element modelling simulations for different geometries. The goal was to optimise the energy density (rotational energy-to-mass ratio) and, at the same time, the rotational energy of a flywheel rotor. The stress behaviour of flywheel rotors under the rotational speed at the maximum stress achievable by the flywheel was analysed. Under this condition, the energy density was obtained for the different geometries, as well as the rotational energy. The best energy density performance due to geometry was achieved with a flywheel rotor presenting a new Gaussian section, which is different from the known Laval disk shape. The best results using a single disk involved a rotational speed of nearly 279,000 rpm and a rotational energy density around 1584 kJ/kg (440 Wh/kg). These values still yielded low total energy; to increase its value, two or three rotors were added to the flywheel, which were analysed in regard to stability. In particular, the triple rotor energy density was ≈ 1550 kJ/kg (431 Wh/kg). As some instability was found in these rotors, a solution using reinforcement was developed to avoid such instabilities. The energy density of such a reinforced double rotor neared 1451 kJ/kg (403 Wh/kg), and the system achieved higher total energy. The material assumed for the devices was carbon fibre Hexcel UHM 12,000, a material kept constant throughout the simulations to allow comparison among the different geometries.

show abstract

Section: Introductionmentioning

confidence: 99%

“…Energy recovery is greater in urban areas due to constant braking occurring in traffic and lower on highways. An alternative for modern cities is the use of hybrid electric cars with regenerative braking and hybrid systems with flywheels with higher energy storage capacity [20].…”

Section: Introductionmentioning

confidence: 99%