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Towards electrified public bus transport [Elektronisk resurs] The case of Stockholm

Xylia, Maria (författare)
Silveira, Semida, 1961- (preses)
Börjesson, Maria (opponent)
KTH Skolan för industriell teknik och management (ITM) (utgivare)
Publicerad: KTH Royal Institute of Technology, 2018
Engelska 77
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  • E-bokAvhandling(Diss. (sammanfattning) Stockholm : Kungliga Tekniska högskolan, 2018)
Sammanfattning Ämnesord
  • This thesis addresses the challenge of road transport electrification using a systems approach for the particular context of Stockholm’s public transport system. The objective is to identify the benefits of large-scale bus electrification on energy efficiency and greenhouse gas emissions, as well as the cost and planning considerations required for achieving such a shift. Quantitative and qualitative methods are deployed for answering the research questions, including the development and use of an optimisation model, survey research, and interviews.  The results of the optimisation model developed for this thesis show that an optimal system configuration is obtained with a combination of electricity and biodiesel. The high energy efficiency of electric buses would lead to a significant reduction of energy consumption in Stockholm, even if not all bus routes in the network are electrified. Although larger battery capacities could support the electrification of more bus routes, this does not necessarily lead to lower environmental impact. In any case, electricity from renewable sources should be used to maximise emission reductions.  The results also show that the annual costs necessary to invest in electric buses can be balanced by lower fuel costs. An effective utilisation of the charging infrastructure is of high priority in order to justify the costs of the required investments. The model results confirm the benefits of creating a dense initial network of charging stations in the inner city’s public transport hubs, which would facilitate the electrification of multiple routes and high infrastructure utilisation at lower costs.  The survey and interviews with stakeholders indicate that multiple issues affect the choice of charging technology, not just costs. Compatibility, reliability, bus dwell time, as well as weather conditions and visual impact are some of the additional aspects taken into account. The introduction of electricity tax exemption for electric buses, the expansion of the electric bus premium to include private stakeholders, as well as the expansion of infrastructure investment subsidy programmes are among the policy instruments suggested for assisting a faster introduction of electric buses into Stockholm’s public transport system.  Although the focus is on Stockholm, the conclusions of this work can be applicable to other cities in Sweden and around the world, which also face the challenge of making public transport a more sustainable option. 


Engineering and Technology  (hsv)
Mechanical Engineering  (hsv)
Energy Engineering  (hsv)
Teknik och teknologier  (hsv)
Maskinteknik  (hsv)
Energiteknik  (hsv)
Energiteknik  (kth)
Energy Technology  (kth)

Indexterm och SAB-rubrik

electric bus; charging infrastructure; optimisation; public transport; fossil-free; transport planning; Sweden
Inställningar Hjälp

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