scholarly journals Economic, environmental and grid-resilience benefits of converting diesel trains to battery-electric

Author(s):  
Natalie D. Popovich ◽  
Deepak Rajagopal ◽  
Elif Tasar ◽  
Amol Phadke

AbstractNearly all US locomotives are propelled by diesel-electric drives, which emit 35 million tonnes of CO2 and produce air pollution causing about 1,000 premature deaths annually, accounting for approximately US$6.5 billion in annual health damage costs. Improved battery technology plus access to cheap renewable electricity open the possibility of battery-electric rail. Here we show that a 241-km range can be achieved using a single standard boxcar equipped with a 14-MWh battery and inverter, while consuming half the energy consumed by diesel trains. At near-future battery prices, battery-electric trains can achieve parity with diesel-electric trains if environmental costs are included or if rail companies can access wholesale electricity prices and achieve 40% use of fast-charging infrastructure. Accounting for reduced criteria air pollutants and CO2 emissions, switching to battery-electric propulsion would save the US freight rail sector US$94 billion over 20 years.

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Minsung Baek ◽  
Jinyoung Kim ◽  
Jaegyu Jin ◽  
Jang Wook Choi

AbstractExtremely fast charging (i.e. 80% of storage capacity within 15 min) is a pressing requirement for current lithium-ion battery technology and also affects the planning of charging infrastructure. Accelerating lithium ion transport through the solid-electrolyte interphase (SEI) is a major obstacle in boosting charging rate; in turn, limited kinetics at the SEI layer negatively affect the cycle life and battery safety as a result of lithium metal plating on the electrode surface. Here, we report a γ-ray-driven SEI layer that allows a battery cell to be charged to 80% capacity in 10.8 min as determined for a graphite full-cell with a capacity of 2.6 mAh cm−2. This exceptional charging performance is attributed to the lithium fluoride-rich SEI induced by salt-dominant decomposition via γ-ray irradiation. This study highlights the potential of non-electrochemical approaches to adjust the SEI composition toward fast charging and long-term stability, two parameters that are difficult to improve simultaneously in typical electrochemical processes owing to the trade-off relation.


2004 ◽  
Vol 2 (2) ◽  
pp. 163-187
Author(s):  
Donald E. Wagner

It is a common assumption in the international media that the fundamentalist Christian Right suddenly appeared on the US political scene following the 11 September 2001 tragedy, and that it became a major force in shaping US policy in the Middle East. While it is true that fundamentalist Christians have exercised considerable influence during the George W. Bush administration, their ascendance is neither new nor surprising. The movement has demonstrated political influence in the US and England intermittently for more than a hundred years, particularly in the formation of Middle East policy. This article focuses on the unique theology and historical development of Christian Zionism, noting its essential beliefs, its emergence in England during the nineteenth century, and how it grew to gain prominence in the US. The alliance of the pro-Israel lobby, the neo-conservative movement, and several Christian Zionist organizations in the US represents a formidable source of support for the more maximalist views of Israel's Likud Party. In the run-up to the 2004 US presidential elections this alliance could potentially thwart any progress on an Israeli–Palestinian peace plan in the near future. Moreover, Likud ideology is increasingly evident in US Middle East policy as a result of this alliance.


Smart Cities ◽  
2021 ◽  
Vol 4 (1) ◽  
pp. 372-404
Author(s):  
Julio A. Sanguesa ◽  
Vicente Torres-Sanz ◽  
Piedad Garrido ◽  
Francisco J. Martinez ◽  
Johann M. Marquez-Barja

Electric Vehicles (EVs) are gaining momentum due to several factors, including the price reduction as well as the climate and environmental awareness. This paper reviews the advances of EVs regarding battery technology trends, charging methods, as well as new research challenges and open opportunities. More specifically, an analysis of the worldwide market situation of EVs and their future prospects is carried out. Given that one of the fundamental aspects in EVs is the battery, the paper presents a thorough review of the battery technologies—from the Lead-acid batteries to the Lithium-ion. Moreover, we review the different standards that are available for EVs charging process, as well as the power control and battery energy management proposals. Finally, we conclude our work by presenting our vision about what is expected in the near future within this field, as well as the research aspects that are still open for both industry and academic communities.


Author(s):  
Carola Leone ◽  
Michela Longo

AbstractRoad transport electrification is essential for meeting the European Union's goals of decarbonization and climate change. In this context, an Ultra-Fast Charging (UFC) system is deemed necessary to facilitate the massive penetration of Electric Vehicles (EVs) on the market; particularly as medium-long distance travels are concerned. Anyway, an ultra-fast charging infrastructure represents the most critical point as regards hardware technology, grid-related issues, and financial sustainability. Thus far, this paper presents an impact analysis of a fast-charging station on the grid in terms of power consumption, obtained by the Monte Carlo simulation. Simulation results show that it is not economical convenient size the assumed ultra-fast charging station for the maximum possible power also considering its high impact on the grid. In view of the results obtained from the impact analysis, the last part of the paper focuses on finding a method to reduce the power installed for the DC/DC stage while keeping the possibility for the electric vehicle to charge at their maximum power. To achieve this goal a modular approach is proposed. Finally, two different modular architectures are presented and compared. In both the solutions, the probability of having EVs charging at limited power is less than 5%.


2021 ◽  
Author(s):  
Jessica Kersey ◽  
Natalie Popovitch ◽  
Amol Phadke

Abstract International maritime shipping—powered by heavy fuel oil—contributes 2.5%, 12%, and 13% of global anthropogenic CO2, SO2, and NOx emissions, respectively. The direct electrification of vessels has been underexplored as a low-emission option despite its considerable efficiency advantage over electrofuels such as green hydrogen and ammonia. Previous studies of ship electrification have relied on outdated battery cost and energy density values and have incorrectly assumed mechanical space to be a fixed technical variable. We show that with near-future battery prices of $100 kWh-1 the electrification of intraregional trade routes of less than 1,000 km is economically feasible with minimal impact to ship carrying capacity. Projected declines in battery price to $50 kWh-1 could improve this range to 5,000 km. We describe a pathway for the battery electrification of containerships within this decade that electrifies over 40% of global containership traffic, reduces CO2 emissions by 40% for US-based vessels, and mitigates the health impacts of air pollution on coastal communities.


Author(s):  
Kau-Fui Vincent Wong ◽  
Guillermo Amador

As society continues advancing into the future, more energy is required to supply the increasing population and energy demands. Unfortunately, traditional forms of energy production through the burning of carbon-based fuels are dumping harmful pollutants into the environment, resulting in detrimental, and possibly irreversible, effects on our planet. The burning of coal and fossil fuels provides energy at the least monetary cost for countries like the US, but the price being paid through their negative impact of our atmosphere is difficult to quantify. A rapid shift to clean, alternative energy sources is critical in order to reduce the amount of greenhouse gas emissions. For alternative energy sources to replace traditional energy sources that produce greenhouse gases, they must be capable of providing energy at equal or greater rates and efficiencies, while still functioning at competitive prices. The main factors hindering the pursuit of alternative sources are their high initial costs and, for some, intermittency. The creation of electrical energy from natural sources like wind, water, and solar is very desirable since it produces no greenhouse gases and makes use of renewable sources—unlike fossil fuels. However, the planning and technology required to tap into these sources and transfer energy at the rate and consistency needed to supply our society comes at a higher price than traditional methods. These high costs are a result of the large-scale implementation of the state-of-the-art technologies behind the devices required for energy cultivation and delivery from these unorthodox sources. On the other hand, as fossil fuel sources become scarcer, the rising fuel costs drive overall costs up and make traditional methods less cost effective. The growing scarcity of fossil fuels and resulting pollutants stimulate the necessity to transition away from traditional energy production methods. Currently, the most common alternative energy technologies are solar photovoltaics (PVs), concentrated solar power (CSP), wind, hydroelectric, geothermal, tidal, wave, and nuclear. Because of government intervention in countries like the US and the absence of the need to restructure the electricity transmission system (due to the similarity in geographical requirements and consistency in power outputs for nuclear and traditional plants), nuclear energy is the most cost competitive energy technology that does not produce greenhouse gases. Through the proper use of nuclear fission electricity at high efficiencies could be produced without polluting our atmosphere. However, the initial capital required to erect nuclear plants dictates a higher cost over traditional methods. Therefore, the government is providing help with the high initial costs through loan guarantees, in order to stimulate the growth of low-emission energy production. This paper analyzes the proposal for the use of nuclear power as an intermediate step before an eventual transition to greater dependence on energy from wind, water, and solar (WWS) sources. Complete dependence on WWS cannot be achieved in the near future, within 20 years, because of the unavoidable variability of these sources and the required overhaul of the electricity transmission system. Therefore, we look to nuclear power in the time being to help provide predictable power as a means to reduce carbon emissions, while the other technologies are refined and gradually implemented in order to meet energy demand on a consistent basis.


2017 ◽  
Vol 367 ◽  
pp. 237-249 ◽  
Author(s):  
Andrew Burnham ◽  
Eric J. Dufek ◽  
Thomas Stephens ◽  
James Francfort ◽  
Christopher Michelbacher ◽  
...  

Author(s):  
John B. Meisel ◽  
John Navin ◽  
Timothy S. Sullivan

The American Recovery and Reinvestment Act of 2009 charged the US Federal Communications Commission (FCC) to develop and deliver to Congress a national broadband plan by February 17, 2010. The FCC formally commenced the process of developing the plan by issuing a Notice of Inquiry (NOI) on April 8, 2009. The NOI identified broadband issues and critical questions and asked stakeholders to respond to these issues and questions with data and analysis. The purpose of this chapter is to analyze the written documents generated by stakeholders’ responses concerning the specific issues of open networks and competition and to make recommendations to the FCC in its formulation of federal policy as to the position that makes the most economic sense on these issues. We find that many of the arguments and concerns of stakeholders are dependent upon predictions regarding the competitiveness of ISP markets. We predict with confidence that technological innovations are likely to make many legal arguments (on all sides) obsolete in the near future.


Head Strong ◽  
2020 ◽  
pp. 78-98
Author(s):  
Michael D. Matthews

Budgetary constraints and emerging advances in weapons technology have resulted in a substantial reduction in the sizes of contemporary military forces. The US Army, at less than 500,000 soldiers, is a fraction of its size of a generation ago, yet the demands for it to deploy in a variety of missions around the globe have only increased. This chapter reviews current and emerging strategies that may aid in optimizing soldier performance. Developments in human physiology, genetics, nutrition, neurotechnology, sleep, noncognitive amplifiers, and leader development are described. Currently available strategies are identified, as are approaches to human performance optimization that are likely to emerge in the near future. Extrapolations of human performance optimization protocols to other contexts beyond the military are considered.


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