14,867 research outputs found
Next Stop: California: The Benefits of High-Speed Rail Around the World and What's in Store for California
Outlines the advantages of high-speed rail systems replacing short-haul air and inter-city car travel, including energy, environmental, and economic benefits. Makes recommendations for land use, planning, and design to maximize benefits for California
A Track Record of Success: High-Speed Rail Around the World and Its Promise for America
Highlights the economic and transportation benefits of high-speed rail in Japan and Europe, including creating jobs, saving energy, protecting the environment, and encouraging sustainable land use and development. Details lessons for the United States
Energy efficiency and integration of urban electrical transport systems: EVS and metro-trains of two real European lines
Transport is a main source of pollutants in cities, where air quality is a major concern. New transport technologies, such as electric vehicles, and public transport modalities, such as urban railways, have arisen as solutions to this important problem. One of the main difficulties for the adoption of electric vehicles by consumers is the scarcity of a suitable charging infrastructure. The use of the railway power supplies to charge electric vehicle batteries could facilitate the deployment of charging infrastructure in cities. It would reduce the cost because of the use of an existing installation. Furthermore, electric vehicles can use braking energy from trains that was previously wasted in rheostats. This paper presents the results of a collaboration between research teams from University of Rome Sapienza and Comillas Pontifical University. In this work, two real European cases are studied: an Italian metro line and a Spanish metro line. The energy performance of these metro lines and their capacity to charge electric vehicles have been studied by means of detailed simulation tools. Their results have shown that the use of regenerated energy is 98% for short interval of trains in both cases. However, the use of regenerated energy decreases as the train intervals grow. In a daily operation, an important amount of regenerated energy is wasted in the Italian and Spanish case. Using this energy, a significant number of electric vehicles could be charged every day
The Solway Estuary: A socio-cultural evaluation of a coastal energy landscape
No abstract available
Transport and energy in India. Energy used by Indian transport systems and consequent emissions: the need for quantitative analyses (Well-to-Wheel, Lifecycle)
The purpose of this work is, at first, a general overview on the state-of-art of the transportation system in India outlining the related energy consumption, for the different transport modes, with consequent estimated emissions. These elements are essential for the preparation of a high-level strategic transport planning on the whole energy issue, to help India in the choices of most suitable transportation systems, according to the well-to-wheel analysis (WTW). Pursuing a WTW global index for India that takes into account both the energy and environmental aspects on a uniform basis is an important aim: it allows the best choices to be made as well as enabling the comparison between some of the most important powertrain and fuel options on the Indian market, the results are discussed from three different points of view: energy, environmental and economic impac
Assessment of energy and emissions saving solutions in urban rail-based transport systems
Global warming and climate change are indisputable theories. Since the Industrial
Revolution, the mean temperature of the planet has increased by 1°C. Now, temperatures
are approaching a higher stage of +1.5°C and the attention is on both CO2 emissions and
energy consumption. Transportation is a major component of the environmental impact,
accounting for approximately 30% of air pollution and energy consumption. Due to the
rapid urbanization in the EU, with an estimated 74.3% of the population living in cities,
forecasted to rise to 80% by 2050, urban mobility is dramatically increasing its relevance.
Therefore, a reduction in energy consumption and pollutant emissions is a crucial factor to
consider in developing urban transportation and particularly rail-based systems, able to
provide energy saving transport services by improving urban environment. Several methods
and techniques are under development to improve the energy performance of Light Rail
Transport (LRT), which spread from different typologies of power supply to improving
energy efficiency. The purpose of this paper is to start from the last developments and
innovative energy sources for LRT systems. The focus is on two parts: a) trams running on
Hydrogen in parallel with on board batteries with energy saving control techniques, b)
potential renewable energy sources to meet power demand. The comparison is with
traditional power sources and equipment (e.g. Catenary-based). The methods, based on
selected indicators, are under development and test by calculations and simulations with
reference to the case study of the new tramlines in the city of Brescia (Italy)
International Energy Technology Transfersfor Climate Change Mitigation - What, who, how, why, when, where, how much … and the Implications for International Institutional Architecture
The goal of the paper is to expand and refine the international technology transfer negotiating and analytic agendas and to reframe the issues. The paper presents concepts, indicators, illustrations and data that identify and measure international transfers of energy technologies that can be used to mitigate climate change. Among the questions on that agenda are how much technology transfer there has been to date, and how much will be needed in the future, especially to assist non-Annex I developing countries in their efforts to mitigate climate change. Before the how much questions can be answered, however, there are several prior questions, and hence the many other elements of the subtitle of the paper: what, who, how, why, when, where. These aspects of international technology transfer vary significantly among three existing institutional settings and among the associated analytic paradigms: North-South Official Development Assistance, Global Private International Investment and Trade, and International Public-Private Cooperation Agreements. The principal sections of the paper focus on features of international technology transfers in these institutional settings and on illustrations drawn from the biodiesel industry, especially the use of jatropha tree as the source of the feedstock. The conclusions are summarized as follows: (i) Technologies include intangible know-how and services, as well as tangible goods in the form of production process equipment and finished products. (ii) International transfers of some types of technology are much easier to measure than others. (iii) International technology transfers are highly industry-specific. (iv) Even for individual industries, it is necessary to use multiple indicators of technology transfers. (v) Patterns in the types of technology and methods of transfer vary across the three institutional settings examined in the paper. (vi) All three of the institutional arrangements are probably under-performing and inadequa
Recovery and valorisation of energy from wastewater using a water source heat pump at the Glasgow Subway: potential for similar underground environments
An installation of a Water Source Heat Hump (WSHP) at Glasgow’s Underground Station, has been using the subsurface wastewater ingress to heat the office at St. George’s Cross station. The performance of the Glasgow Subway’s new heating system was observed for a few months. The energy output readings are being presented. An average coefficient of performance (CoP) of 2.5 and a 60% energy input reduction for the heating system based on the old heating system’s energy demand indicates the actual system’s performance. The purpose of this research is to detect the likelihood of implementing the same setup in similar underground environments where the excess wastewater may support a viable and eco-friendly heating system. Fifteen cities across Europe have been identified and presented, with the adequate water quantities, where similar heating systems may be applied. The output of this study indicates not only the financial benefit but also the energy and carbon reduction of this trial. It highlights main subjects which were encountered in such a challenging subway system. Future steps to commercialize the excess heat energy output are explored together with opportunities to promote the same setup in similar cases
Investigation to enhance sustainable improvements in high speed rail transport
Transport systems are essential for the life of modern societies and economies. A sustainable transport system can shape a sustainable development pattern and socio-economic attributes of urban centres and regions. The use of private cars and trucks is increasing in most countries, creating more congestion, accidents, pollution and energy consumption. Many governments desire to achieve growth in public transport to overcome these adverse trends. A massive shift toward an environmentally sound type of transport is crucial and railways are deemed to be one of the most sustainable modes. All over the world the railway industry is involved in a renewal to reform and up-date rail, prompted largely by environmental concerns. The trend is to develop speed-competitive systems to expand transportation capacity. The focus of the current research, which is at its commencing stages, is to investigate the opportunities to apply an alternative approach to railway operations to overcome the difficulty of high speed transport in servicing larger amounts of demand, while achieving minimum point to point travel time, in a viable and integrated environment for both passenger and freight services. The expected outcome of the research project is to present a framework that may be used to identify and evaluate the most cost-effective transport solution to service not only major cities, but also regional centres along an interregional rail corridor, thus providing greater benefits on local economies and to build a spine for future development
WePWEP: web-based participatory wind energy planning [1]. Background information on wind energy and wind farm siting.
This document has been prepared in the frame of a PhD research project, which aim is to develop and test a learning-enhancing website design to involve the public in spatial planning. The application focused is the strategic planning of wind farms location. The website developed is named WePWEP – Web-based Participatory Wind Energy Planning and is available at hppt://ernie.ge.ucl.ac.uk:8080/WePWEP/.
Being the purpose of the website to contribute to learning and engage the public in the strategic planning of wind farms, it provides some background information on wind energy and wind farm siting. This document compiles the information that is available in the website.
With regard to wind energy, the section dedicated to the debate surrounding wind energy should be of particular relevance for those interested in an overview of the arguments pro and against wind energy development.
Under the wind farm siting topic, the factors that need consideration during the site selection process are introduced, and subsequently the involvement of the public in wind farms planning is reviewed and discussed.
The document concludes with the author supporting a more participative role of the public in the wind energy planning process and suggesting that the WePWEP website is a means that can contribute to this achievement
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