Distributed Energy Articles
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On the probabilistic distribution of wind speeds: theoretical development and comparison with data
The probabilistic distributions of wind speed are a critical piece of information needed in the assessment of wind-energy potential, and have been conventionally described by various empirical correlations. Among the empirical correlations, the Weibull distribution has been most popular due to its ability to fit most accurately the variety of wind-speed data measured at different geographical ...
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Fuel cell heating appliances field tests
The beginning of field tests with a new generation of fuel cell heating appliances (FCHAs) under the responsibility of Vaillant brings fuel cell technology for decentralized household energy supply into a new phase. The objective of testing the systems, which were developed in close cooperation with the US company Plug Power, is to examine how complexity and thus the systems' costs can be ...
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Virtual Power Plant Ensures Optimum Energy Mix
For the management of its power plants, the utility company SaarEnergie is using a network control center from Siemens that simulates a virtual power plant. B ased in the German city of Saarbrücken, the utility company not only operates several power plants with a total capacity of about 2,000 megawatts; it also procures electricity from various distributed energy generation facilities such ...
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Privatisation of the Brazilian electricity industry: opportunities and pitfalls
In the early 1990s, Brazil started a debate about the role of the state in the economy in general, and the energy sector in particular. A major privatisation process of state assets began in which energy, and in particular the electricity utilities, were earmarked for special attention, given their monopolistic structure and perceived low productivity and inefficiency. Thus, the privatisation of ...
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Benchmarking as a strategic policy tool for energy management
In this paper, we analyse to what extent benchmarking is a valuable tool in strategic energy policy analysis. First, the theory on benchmarking is concisely presented, e.g., by discussing the benchmark wheel and the benchmark path. Next, some results of surveys among business firms are presented. To offer a more detailed analysis of the scope and potential of benchmarking, results are presented ...
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Technology brokers in the North American software industry: getting the most out of mismatched dyads
Much valuable innovation takes place in smaller firms. Yet small-firm innovators often have insufficient capital, production and marketing expertise, or distributional power to take full advantage of their developments. Larger firms have those capabilities but, with those functions highly professionalised, may have difficulties dealing with smaller firms. Mechanisms are needed to bring the ...
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Energy efficiency for sustainable development in Russia: renewables, new technologies and policy issues
This paper assesses possible ways to efficient energy use for sustainable development in Russia. Based on the research of the Energy Institute (EnIn), Moscow, [1,2], analysis of different studies of the power sector in Russia is provided to generalise the state of the art in energy production, distribution and consumption, and technological innovations for renewable resources utilisation. ...
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A commercial approach to solar power distribution in India
In India, approximately 5,000 of 79,000 unelectrified villages, either unapproachable from the grid line or subject to uneconomic viability, are awaiting electricity through SPV power as the only suitable technological option. SPV power, which is expensive in capital cost, although affordable in tariff, is on successful trial through a novel scheme that is subsidy-free. Limited scale ...
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Energy in Sudan
Sudan is an agricultural country with fertile land, plenty of water resources, livestock, forestry resources, and agricultural residues. An overview of the energy situation in Sudan is introduced with reference to the end uses and regional distribution. Energy sources are divided into two main types: conventional energy (biomass, petroleum products, and electricity); and non-conventional energy ...
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Flexible energy systems: integration of electricity production from CHP and fluctuating renewable energy
Renewable energy sources and distributed generation play a crucial role in supporting the European Union's key policy objectives of combating the greenhouse effect. In order to bring about a substantial long-term penetration of distributed energy resources in Europe, one of the most important future challenges seems to be the management of the integration of fluctuations in electricity production ...
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Power-law distribution of acid deposition
The scaling behaviour in acid deposition dynamics of 184 monitoring sites under the National Atmospheric Deposition Program (NADP) is analysed for the 1978–2001 period. The results show that: the distribution of weekly hydrogen deposition (WHD) is consistent with a power law in two different regimes separated by a crossover WHD (CWHD), and both the CWHD and its probability density increase as the ...
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Reduce, reuse and renew: one possible approach to cut carbon emissions
Global climate change has become an increasingly important issue over the last several years. This issue reached a climax at the Kyoto Conference in December, 1997 where the US agreed to reduce its greenhouse gas emissions to 7% under its 1990 levels by 2010. This paper describes how distributed resources could be part of an overall solution towards achieving these reductions. It illustrates how ...
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Development of Pre-Turbo Catalyst for Natural Gas Engines
Distributed power generation is an efficient method for reducing CO2 emissions through the elimination of transmission losses. Co-generation has similar benefits with higher thermal efficiency. Natural gas engines are very popular for these applications. Unfortunately, these engines emit significant levels of methane, which is a greenhouse gas. Reduction of methane emissions would greatly ...
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