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Successful PhD defence by Dennis Dreier

From left to right: Professor Viktoria Martin, Dennis Dreier, Dilip Khatiwada and Will Usher.
Published May 27, 2020

On May 5th, 2020, Dennis Dreier from the division of Energy Systems (KTH-dES), successfully defended his PhD thesis “Transition Technologies for Electrification and Optimisation of Bus Transport Systems”.

Dennis’ work  focused on addressing the transition phase of public bus transport systems by exploring electrification as a vector for decarbonisation. He used the C40-city of Curitiba in Southern Brazil as a case study. Moreover, the research was of explorative and empirical nature.

His research findings, applied methods and developed tools can be used to support and inform analysts and decision-makers in the area of transport and energy systems planning in data-driven decision-making processes, to develop and assess different technological options and strategies at different levels while considering associated uncertainties.

His research consisted of the following publications:

  • Well-to-Wheel analysis of fossil energy use and greenhouse gas emissions for conventional, hybrid-electric and plug-in hybrid-electric city buses in the BRT system in Curitiba, Brazil. DOI: 10.1016/j.trd.2017.10.015
  • The influence of passenger load, driving cycle, fuel price and different types of buses on the cost of transport service in the BRT system in Curitiba, Brazil. DOI: 10.1007/s11116-018-9925-0  
  • Comparison of management strategies for the charging schedule and all-electric operation of a plug-in hybrid-electric bi-articulated bus fleet. DOI: 10.1007/s12469-020-00227-z
  • OSeMOSYS-PuLP: A Stochastic Modeling Framework for Long-Term Energy Systems Modeling. DOI: 10.3390/en12071382 . Source code repository of OSeMOSYS-PuLP:

After the defence, Dennis’ work was praised by the committee and he was awarded the PhD degree. His PhD advisors were Mark Howells, Viktoria Martin, Semida Silveira, Dilip Khatiwada and Will Usher.