Xem 1-19 trên 19 kết quả Wind resource
  • As environmental concerns have focused attention on the generation of electricity from clean and renewable sources wind energy has become the world's fastest growing energy source. The Wind Energy Handbook draws on the authors' collective industrial and academic experience to highlight the interdisciplinary nature of wind energy research and provide a comprehensive treatment of wind energy for electricity generation.

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  • The second edition of theWind Energy Handbook seeks to reflect the evolution of design rules and the principal innovations in the technology that have taken place in the ten years since the first edition was published. A major new direction in wind energy development in this period has been the expansion offshore and so the opportunity has been taken to add a new chapter on offshore wind turbines and wind farms.

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  • With shortages of fossil energy and heavy biomass energy use occurring in both developed and developing countries, a major focus has developed worldwide on renewable energy systems. Currently, a heavy focus is on biofuels made from crops, crop residues and wood. Though it may seem beneficial to use renewable plant materials for biofuel, their use raises many concerns about major environmental problems, including food shortages and serious destruction of vital soil resources.

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  • The papers in this book provide new information on several aspects of soil erosion and applications of the National Resources Inventory (NRI). They were commissioned following a planning workshop in July 1984 and were presented in December 1984 during a national convocation, “Physical Dimensions of the Erosion Problem.” The workshop and convocation were held by the National Research Council's Board on Agriculture in response to a request from the Soil Conservation Service of the U.S.

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  • Chater 5: Earth's resources includes natural resources (what ways do you use water? what are natural resources? How do we use rocks and soil? How do we use water and wind?) plant and animal resources (How do we use plants and animals? How do we use plants?...), resources of California.

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  • The most informative dictionary of economics available, the Routledge Dictionary of Economics avoids the tendency to indulge in long-winded definitions of the major concepts and provides students with a lucid, comprehensive and accurate guide to the discipline. Employing the key feature of further reading with many of the terms, the book uses the subject classification system defined by the Journal of Economic Literature and The Economic Journal.

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  • A look on energy, renewable energies, energy storage and synthetic fuels, hybrid architecture, fuel cells, hydrogen as a vector of energy of the future.The Earth resources are quite limited in quantity Many challenges to mankind in 21st century: development, health, water, food, demography, education, energy.In physics, energy (Ancient Greek: ἐνέργεια energeia "activity, operation"[1]) is a quantity that is often understood as the ability a physical system has to produce changes on another physical system.

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  • Wind power generation is considered as the most economic viable alternative within the portfolio of renewable energy resources. Among their advantages are the large number of potential sites for erection and the rapidly evolving technology with many suppliers offering from the individual turbine set to even turnkey projects. The disadvantages of wind energy include high capital costs and lack of controllability on the discontinuous or intermittent resource.

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  • Humanity is facing several critical global challenges at the beginning of the 21st century. One of which includes the quest for alternative energy resources that mitigate the dependence on fossil fuels. Whereas fossil fuels are available in situ at all times, the utilisation of renewal energies has to cope with large temporal fl uctuations ranging from seconds to seasons.

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  • Cyclones are a key element of the atmospheric circulation in the midlatitudes (Carlson, 1998). Cyclogenesis, for which a first conceptual model was presented by the Bergen school (Bjerknes, 1910), occurs most frequently at the polar front. The various ascending and descending airstreams typically associated with these cyclones carry a range of different chemical signatures (Cooper et al., 2002). The so-called warm conveyor belt (WCB) – a strongly ascending airstream ahead of a cyclone’s cold front (Browning et al.

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  • Renewable energy technologies—including solar, wind, biomass, geothermal, and hydropower—are in many ways attractive to policy makers who must address these market disruptions and the economic and social strife they can create. Renewable energy technologies are advantageous because they are immune to price shocks from fuel supply constraints and cartel pricing. Furthermore, renewable energy resources are much more environmentally benign than their conventional counterparts, such as coal, nuclear, and petroleum products.

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  • Solar energy, light and heat radiation from the Sun, has been exploited by humans since ancient times using a variety of technology development than ever before. Solar radiation along with secondary resources of energy like wind and solar energy, water power and biomass, make the most of renewable energy available on earth. Only a tiny fraction of the available solar energy is used.

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  • Plants are continuously affected by a variety of environmental factors. Whereas biotic environmental factors are other organisms such as symbionts, parasites, pathogens, herbivores, and competitors, abiotic factors include parameters and resources which determine plant growth like temperature, relative humidity, light, availability of water, mineral nutrients, and CO 2 , as well as wind, ionizing radiation, or pollutants (Schulze et al. 2002 ) . The effect each abiotic factor has on the plant depends on its quantity or intensity.

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  • Overall structure of electrical power system is in the process of changing. For incremental growth, it is moving away from fossil fuels - major source of energy in the world today - to renewable energy resources that are more environmentally friendly and sustainable [1].

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  • Renewable Energy is energy generated from natural resources - such as sunlight, wind, rain, tides and geothermal heat - which are naturally replenished. In 2008, about 18% of global final energy consumption came from renewables, with 13% coming from traditional biomass, such as wood burning. Hydroelectricity was the next largest renewable source, providing 3% (15% of global electricity generation), followed by solar hot water/heating, which contributed with 1.3%. Modern technologies, such as geothermal energy, wind power, solar power, and ocean energy together provided some 0.

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  • Overall structure of electrical power system isin the process of changing. For incremental growth, it is moving away from fossil fuels - major source of energy in the world today - to renewable energy resources that are more environmentally friendly and sustainable [1].

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  • For towns and cities to be economically competitive, socially progressive and environmentally responsible, they must reduce their inefficient use of finite resources. CABE believes every place can become better by: Understanding and nurturing its unique qualities as the basis of its response to a changing climate Each town and city is different, shaped by the geography of the place itself, the passage of time and the people who live there. The best solutions for one place may not suit another.

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  • About 95% of the renewable energy sold to consumers through green pricing programs was supplied from projects meeting the generally accepted industry definition of “new.” Renewable energy sold through green pricing programs in 2008 represents an equivalent renewable energy capacity of more than 1,500 MW, with more than 1,400 MW of this represented by “new” renewable energy resources (Table 11).

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  • The KidWind Project is a team of teachers, students, engineers, and prac- titioners exploring the science behind wind energy in classrooms around the US. Our goal is to introduce as many people as possible to the elegance of renewable energy through hands-on science activities which are challenging, engaging, and teach basic science principles. While improving science education is our main goal, we also aim to help schools become important resources for both students and the general public, to learn about and see renewable energy in action....

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