24,905 research outputs found

    Energy for Development: The Potential Role of Renewable Energy in Meeting the Millennium Development Goals

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    This report identifies renewable energy options that are currently in wide use in some regions and that are now ready for large-scale introduction in many areas of the developing world. Through 26 case studies, the report cites biogas, small hydro, solar, wind, ethanol, and biodiesel, among other technologies, as viable options for poverty alleviation in developing countries.As their cost has declined and their reliability has improved, renewable energy technologies have often emerged as more affordable and practical means of providing essential energy services. Although the strongest renewable energy growth has been in grid-connected power systems and liquid fuels for transportation, several technologies are well-suited to providing modern energy services for low-income people. Scaling up a broad portfolio of renewable energy options can make a major contribution to achieving the Millennium Development Goals, concludes the report.The creation of REN 21 was sponsored by the German Federal Ministry for Economic Cooperation and Development and the German Federal Ministry for the Environment, Nature Conservation and Nuclear Safety. Formally established in Copenhagen in June 2005, REN 21 is now supported by a steering committee of 11 governments, five intergovernmental organizations, five non-governmental organizations, and several regional, local and private organizations

    Low-carbon energy: a roadmap

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    Technologies available today, and those expected to become competitive over the next decade, will permit a rapid decarbonization of the global energy economy. New renewable energy technologies, combined with a broad suite of energy-efficiency advances, will allow global energy needs to be met without fossil fuels and by adding only minimally to the cost of energy services The world is now in the early stages of an energy revolution that over the next few decades could be as momentous as the emergence of oiland electricity-based economies a century ago. Double-digit market growth, annual capital flows of more than $100 billion, sharp declines in technology costs, and rapid progress in the sophistication and effectiveness of government policies all herald a promising new energy era. Advanced automotive, electronics, and buildings systems will allow a substantial reduction in carbon dioxide (CO2) emissions, at negative costs once the savings in energy bills is accounted for. The savings from these measures can effectively pay for a significant portion of the additional cost of advanced renewable energy technologies to replace fossil fuels, including wind, solar, geothermal, and bioenergy. Resource estimates indicate that renewable energy is more abundant than all of the fossil fuels combined, and that well before mid-century it will be possible to run most national electricity systems with minimal fossil fuels and only 10 percent of the carbon emissions they produce today. The development of smart electricity grids, the integration of plug-in electric vehicles, and the addition of limited storage capacity will allow power to be provided without the baseload plants that are the foundation of today's electricity systems. Recent climate simulations conclude that CO2 emissions will need to peak within the next decade and decline by at least 50 to 80 percent by 2050. This challenge will be greatly complicated by the fact that China, India, and other developing countries are now rapidly developing modern energy systems. The only chance of slowing the buildup of CO2 concentrations soon enough to avoid catastrophic climate change that could take centuries to reverse is to transform the energy economies of industrial and developing countries almost simultaneously. This would have seemed nearly impossible a few years ago, but since then, the energy policies and markets of China and India have begun to change rapidly -- more rapidly than those in many industrial countries. Renewable and efficiency technologies will allow developing countries to increase their reliance on indigenous resources and reduce their dependence on expensive and unstable imported fuelsAround the world, new energy systems could become a huge engine of industrial development and job creation, opening vast new economic opportunities. Developing countries have the potential to "leapfrog" the carbon-intensive development path of the 20th century and go straight to the advanced energy systems that are possible today. Improved technology and high energy prices have created an extraordinarily favorable market for new energy systems over the past few years. But reaching a true economic tipping point will require innovative public policies and strong political leadership

    New Electricity Technologies for a Sustainable Future

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    There is a growing concern over our reliance on conventional electricity sources and their long-term environmental, climate change, and security of supply implications, and much hope is vested in the ability of future technological progress to tackle these issues. However, informed academic analysis and policy debates on the future of electricity systems must be based on the current state, and prospects of, technological options. This paper is the introductory chapter in the forthcoming book Future Electricity Technologies and Systems. The book comprises contributions from leading experts in their respective technology areas. The chapters present state of the art and likely progress paths of conventional and new electricity generation, networks, storage, and end-use technologies. In this paper we review the growth trend in electricity demand and carbon emissions. We then present a concise overview of the chapters. Finally, we discuss the main contextual factors that influence long-term technological progress

    Microgrids & District Energy: Pathways To Sustainable Urban Development

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    A microgrid is an energy system specifically designed to meet some of the energy needs of a group of buildings, a campus, or an entire community. It can include local facilities that generate electricity, heating, and/or cooling; store energy; distribute the energy generated; and manage energy consumption intelligently and in real time. Microgrids enable economies of scale that facilitate local production of energy in ways that can advance cost reduction, sustainability, economic development, and resilience goals. As they often involve multiple stakeholders, and may encompass numerous distinct property boundaries, municipal involvement is often a key factor for successful implementation. This report provides an introduction to microgrid concepts, identifies the benefits and most common road blocks to implementation, and discusses proactive steps municipalities can take to advance economically viable and environmentally superior microgrids. It also offers advocacy suggestions for municipal leaders and officials to pursue at the state and regional level. The contents are targeted to municipal government staff but anyone looking for introductory material on microgrids should find it useful

    A Renewable Energy Plan for Mozambique

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    Mozambique has among the lowest uses of electricity in the world. Yet virtually all of the electricity it does produce from Cahora Bassa Dam on the Zambezi is shipped to its wealthy neighbor, South Africa. As the government prepares to build another costly large dam on the Zambezi that will also power South Africa rather than homes and businesses in Mozambique, a new report lays out a saner plan for developing renewable energy sources across the nation that would share the energy wealth more equitably; diversify the national electricity grid to help the nation adapt to climate change (which is expected to significantly affect large hydro), and build a clean energy sector that would also spare the Zambezi

    Renewables 2005: Global Status Report

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    The Global Status Report provides an assessment of several renewables technologies -- small hydro, modern biomass, wind, solar, geothermal, and biofuels -- that are now competing with conventional fuels in four distinct markets: power generation, hot water and space heating, transportation fuels, and rural (off-grid) energy supplies. The report finds that government support for renewable energy is growing rapidly. At least 48 countries now have some type of renewable energy promotion policy, including 14 developing countries. Most targets are for shares of electricity production, typically 5-30 percent, by the 2010-2012 timeframe. Mandates for blending biofuels into vehicle fuels have been enacted in at least 20 states and provinces worldwide as well as in three key countries -- Brazil, China and India. Government leadership provides the key to market success, according to the report. The market leaders in renewable energy in 2004 were Brazil in biofuels, China in solar hot water, Germany in solar electricity, and Spain in wind power. The Global Status Report fills a gap in the international energy reporting arena, which has tended to neglect the emerging renewable energy technologies. Regular updates will be produced in the future. The report was produced and published by the Worldwatch Institute and released today at the Beijing International Renewable Energy Conference 2005, sponsored by the Government of China. This Conference brings together government and private leaders from around the world, providing a forum for international leadership on renewable energy and connects the wide variety of stakeholders that came together at the International Conference for Renewable Energies in Bonn, Germany, in 2004. The creation of REN21 was sponsored by the German Federal Ministry for Economic Cooperation and Development and the German Federal Ministry for the Environment, Nature Conservation and Nuclear Safety. Formally established in Copenhagen in June 2005, REN21 is now supported by a steering committee of 11 governments, 5 intergovernmental organizations, 5 non-governmental organizations, and several regional, local, and private organizations
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