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Potentials And Prospects For Renewable Energies At Global Scale

机译：全球范围内可再生能源的潜力和前景

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Renewable energies (RE) represent a cornerstone to steer our energy system in the direction of sustainability and supply security. Generating electricity, heat or biofuels from renewable energy sources has become a high priority in the energy policy strategies at national level as well as at a global scale. Challenging goals for these "new" supply options to meet our energy demands have been set, e.g. at European level by the commitment of meeting 20% of the overall energy demand from renewable energy sources by 2020. A broad set of different RE technologies and resources exist today. Obviously, for a comprehensive investigation of the future RE development it is of crucial importance to provide a detailed investigation of the country-or region-specific situation-e.g. with respect to the potential of the certain RE's in general as well as the part that can be realised in the near future. It is the core objective of this paper to fulfil above-mentioned constraints, aiming to present an overview on the RE potentials and prospects globally-but based on region- and/or country-specific assessments of the resource conditions, the overall energy system boundaries and the related energy policy framework. Thus, a topical focus is put on both the near to mid future up to 2020 and the long-term perspective, indicating besides theoretical and technical potentials also the realisable mid- and long-term potentials referring to the time-horizon between 2030 and 2050 and prospects for the various renewable energy options. Future prospects are discussed by means of analysing energy policy scenarios as conducted for the International Energy Agency (IEA)'s "World Energy Outlook"-series. In this context, emphasis is given on the illustration of the possible contribution of renewable energies to power supply.
机译：可再生能源（RE）是引导我们的能源系统朝可持续性和供应安全方向发展的基石。从可再生能源中产生电，热或生物燃料已经成为国家和全球范围内能源政策战略中的高度优先事项。这些“新的”供应方案满足我们的能源需求的挑战性目标已经设定，例如承诺到2020年满足20％的可再生能源需求，从而达到欧洲水平。如今，存在着各种各样的可再生能源技术和资源。显然，对于未来可再生能源发展的全面调查，至关重要的是对国家或地区的具体情况进行详细调查，例如：关于某些可再生能源的潜力以及在不久的将来可以实现的部分。本文的核心目标是要满足上述约束，旨在概述全球可再生能源的潜力和前景，但要基于对资源条件，整个能源系统边界的地区和/或国家特定评估以及相关的能源政策框架。因此，重点关注的是2020年之前的中长期和长期前景，这表明除了理论和技术潜力之外，还有可实现的中长期潜力，涉及2030年至2050年之间的时间跨度以及各种可再生能源选择的前景。通过分析国际能源署（IEA）的“世界能源展望”系列中的能源政策方案来讨论未来的前景。在这种情况下，重点放在说明可再生能源对电源的可能贡献上。

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