| 1. |
- Ghaviha, Nima, et al.
(författare)
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Review of Application of Energy Storage Devices in Railway Transportation
- 2017
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Ingår i: Energy Procedia. - : Elsevier BV. - 1876-6102.
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Konferensbidrag (refereegranskat)abstract
- Regenerative braking is one of the main reasons behind the high levels of energy efficiency achieved in railway electric traction systems. During regenerative braking, the traction motor acts as a generator and restores part of the kinetic energy into electrical energy. To use this energy, it should be either fed back to the power grid or stored on an energy storage system for later use. This paper reviews the application of energy storage devices used in railway systems for increasing the effectiveness of regenerative brakes. Three main storage devices are reviewed in this paper: batteries, supercapacitors and flywheels. Furthermore, two main challenges in application of energy storage systems are briefly discussed. © 2017 The Authors.
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| 2. |
- Vassileva, Iana, et al.
(författare)
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Adoption barriers for electric vehicles : Experiences from early adopters in Sweden
- 2017
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Ingår i: Energy. - : PERGAMON-ELSEVIER SCIENCE LTD. - 0360-5442 .- 1873-6785. ; 120, s. 632-641
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Tidskriftsartikel (refereegranskat)abstract
- Electric vehicles are considered as one of the most effective technologies for reducing current greenhouse gas emissions from the transport sector. Although in many countries, local and national governments have introduced incentives and subsidies to facilitate the electric vehicle market penetration, in Sweden, such benefits have been limited. Results from a survey carried out among private owners of electric vehicles are presented in this paper, including the analysis of the respondents socio-demographic characteristics, reasons for choosing an electric vehicle, charging locations and driving preferences, among others. The main results characterize current electric vehicle drivers as male, well-educated, with medium-high income; electric vehicles are used mainly for private purposes and charged at home during night time. Furthermore, the paper presents an analysis of the impact of large-scale penetration of electric vehicles on existing power distribution systems. The findings presented in this paper provide important insights for assuring a sustainable large-scale penetration of electric vehicles by learning from the experiences of early adopters of the technology and by analyzing the impact of different EV penetration scenarios on the power distribution grid.
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| 3. |
- Vassileva, Iana, et al.
(författare)
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Technology assessment of the two most relevant aspects for improving urban energy efficiency identified in six mid-sized European cities from case studies in Sweden
- 2017
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Ingår i: Applied Energy. - : Elsevier BV. - 0306-2619 .- 1872-9118. ; 94, s. 808-818
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Tidskriftsartikel (refereegranskat)abstract
- The increasing population living in cities is leading to higher resource utilization, which strains the cities’ability to focus on sustainability. Adoption of different technologies can transform cities into ‘‘smartcities” that utilize energy in a more efficiently.This paper presents results from a technology assessment tool developed together with six mid-sizedEuropean cities. The main areas of focus have been evaluated based on the cities’ priorities: transportation(both public and private) and consumers’ perspectives on the use of smart electricity meters. The useof electric vehicles in Sweden, and a techno-economic evaluation of biogas-derived biomethane and electricityuse in public transportation have been analyzed. The main conclusions show an overall higher efficiencyfor biogas-derived electricity use in electric buses; a need for higher consumer engagementthrough more detailed information provision for both increasing EV market penetration and electricitysavings; and a need to establish detailed technology assessments for successful technology adoption incities.
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