The Trackless Tram: Is It the Transit and City Shaping Catalyst We Have Been Waiting for?

Newman, Peter; Hargroves, Karlson; Davies-Slate, Sebastian; Conley, Daniel J.; Verschuer, Marie; Mouritz, Mike; Yangka, Dorji

doi:10.4236/jtts.2019.91003

Cited by 33 publications

(36 citation statements)

References 22 publications

(24 reference statements)

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“…By selecting the corresponding module in Simulink, connecting each module with reference to the mathematical model, and adjusting the parameters, we build the Simulink block diagram, where the reference voltage is set to 2.7 V, and the three charging modules charge the capacitor with a total current of 3 A [24].…”

Section: Simulation Resultsmentioning

confidence: 99%

Cooperative Control for Multi-Module Charging Systems of Ultracapacitors

Zhang

Lei

et al. 2020

Energies

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Ultracapacitors have recently received great attention for energy storage due to their small pollution, high power density, and long lifetime. In many applications, ultracapacitors need to be charged with a high current, where a multi-module charging system is typically adopted. Although the classical decentralized control method can control the charging process of ultracapacitors, there exists a problem that the charging current may be imbalanced among charging modules. In this paper, a cooperative cascade charging method is proposed for the multi-module charging system to reduce the current imbalance among charging modules. First, the state-space averaging method and graph theory are used to model the multiple-module charging system. Second, an effective cooperative cascade control is proposed, where the outer voltage loop stabilizes the output voltage to the desired voltage and the inner current loop guarantees the current of each charger to follow the target current. The block diagram is used to establish the closed-loop model of the charging system. In order to evaluate the proposed charging method, a laboratory prototype was established. Compared with the classical decentralized method, this method can effectively suppress the current imbalance, which is proved by simulation and experimental results.

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Section: Simulation Resultsmentioning

confidence: 99%

Cooperative Control for Multi-Module Charging Systems of Ultracapacitors

Zhang

Lei

et al. 2020

Energies

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“…In particular, the electric transport system entails large cost attributable to relatively high capital cost of electric trucks and an electric passenger transport system, however these systems are all reducing rapidly in cost. For example, an electric public transport system can be introduced that removes many cars from the road system [28] with technologies like the Trackless Tram (involving cross-over autonomous rail technologies) which is around one tenth of the cost of urban rail as no track work is required [29]. Such options increase GNH and GDP, as well as reducing GHG.…”

Section: Discussionmentioning

confidence: 99%

Carbon Neutral Bhutan: Sustaining Carbon Neutral Status Under Growth Pressures.

Yangka

Rauland

Newman

2020

Preprint

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Abstract Background: Bhutan has pledged to remain carbon neutral (CN) in perpetuity. Whether they can sustain this is questionable due to the country’s increasing economic growth (GDP) and commitment to gross national happiness (GNH) outcomes, both of which can lead to a rise in greenhouse gas (GHG) emissions. The nexus between GHG, GNH and GDP is the essence of the sustainable development global project.Results: Through scenario modelling using the Long-range Energy Alternative Planning (LEAP) model, the study finds that the carbon neutral declaration will derail between 2037 and 2050 without mitigation measures. By putting in place mitigation measures especially in the industry and transport, CN can be retained even under high growth pressure, which may cost just 2% of GDP. CN can be easily retained under low economic growth, but this could undermine GNH.Conclusions: The options to remain CN will require Bhutan to adopt more efficient technologies and electrify industry and transport under both low and high growth scenarios. The additional cost to the Bhutanese economy is feasible through low and high growth opportunities. The options are similar to those confronting emerging nations struggling with issues of climate commitments under economic growth pressures.

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“…Disruption is demand-driven, like the smartphone, but those cities adapting to new systems with the cluster of solar-battery electric vehicles (EVs) are also seeing common-good outcomes that they can assist [29]. These public benefits are especially seen in how EVs are assisting electromobility in the new forms of micromobility and new midtier electric transit (often referred to as trackless trams, [70]), which have multiple benefits in overcoming automobile dependence, the double-edged sword of the last big economic wave after the 1930s.…”

Section: Electromobility Micromobility Transit Walkability and Actmentioning

confidence: 99%

COVID, CITIES and CLIMATE: Historical Precedents and Potential Transitions for the New Economy

Newman

2020

Urban Science

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The 2020 collapse of the global economy due to the Covid-19 pandemic has enabled us to think about long term trends and what the future could hold for our cities and regions, especially due to the climate agenda. The paper sets out the historical precedents for economic transitions after collapses that unleash new technologically based innovation waves. These are shown to be associated with different energy and infrastructure priorities and their transport and resulting urban forms. The new technologies in the past were emerging but mainstreamed as the new economy was built on new investments. The paper suggests that the new economy, for the next 30 years, is likely to be driven by the Paris Agreement and Sustainable Development Goals (SDGs) agendas (summarised as zero carbon–zero poverty) and will have a strong base in a cluster of innovative technologies: renewable energy, electromobility, smart cities, hydrogen-based industry, circular economy technologies, and biophilic urbanism. The first three are well underway, and the other three will need interventions if not cultural changes and may miss being mainstreamed in this recovery but could still play a minor role in the new economy. The resulting urban transformations are likely to build on Covid-19 through “global localism” and could lead to five new features: (1) relocalised centres with distributed infrastructure, (2) tailored innovations in each urban fabric, (3) less car dependence, (4) symbiotic partnerships for funding, and (5) rewritten manuals for urban professionals. This period needs human creativity to play a role in revitalising the human dimension of cities. The next wave following this may be more about regenerative development.

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The Trackless Tram: Is It the Transit and City Shaping Catalyst We Have Been Waiting for?

Abstract: Recent innovations in transport technology are now providing mobility that is cheaper, autonomous, electric, and with improved ride quality.

Cited by 33 publications

References 22 publications

Cooperative Control for Multi-Module Charging Systems of Ultracapacitors

Cooperative Control for Multi-Module Charging Systems of Ultracapacitors

Carbon Neutral Bhutan: Sustaining Carbon Neutral Status Under Growth Pressures.

COVID, CITIES and CLIMATE: Historical Precedents and Potential Transitions for the New Economy

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