Grid electricity

Xem 1-20 trên 28 kết quả Grid electricity
  • Photovoltaics have started replacing fossil fuels as major energy generation roadmaps, targeting higher efficiencies and/or lower costs are aggressively pursued to bring PV to cost parity with grid electricity. Third generation PV technologies may overcome the fundamental limitations of photon to electron conversion in single-junction devices and, thus, improve both their efficiency and cost. This book presents notable advances in these technologies, namely organic cells and nanostructures, dye-sensitized cells and multijunction III/V cells. ...

    pdf244p orchid_1 25-09-2012 26 11   Download

  • This book analyses the key issues of the offshore wind farm's energy transmission and grid integration infrastructure. But, for this purpose, there are not evaluated all the electric configurations. In the present book is deeply evaluated a representative case. This representative case is built starting from three generic characteristics of an offshore wind farm: the rated power, the distance to shore and the average wind speed of the location.

    pdf0p orchid_1 25-09-2012 39 12   Download

  • Some years ago a consortium of enterprises and a university from different European countries and industrial sectors was established to work together in the development of lighter lead–acid batteries for electrical and conventional vehicles with new innovative materials and process techniques, with the final goal of increasing the energy density by means of a battery weight reduction. Its main idea was to substitute the heavy lead alloy grids mechanical support of the active masses and collectors of the current produced during the charge and discharge reactions.

    pdf11p congdat261 19-11-2010 77 17   Download

  • There is an upward trend that human activities involve more electric power nowadays and for years to come. And we will soon be facing shortage of electricity supply if we rely solely on non-renewable power generation from fossil fuels such as coals. Renewable energy generation has proven effective in meeting the demand.

    pdf157p namde01 10-04-2013 53 10   Download

  • The research is designed for developing the pilot small-scale clean development mechanism bundled project activities in Vietnam electricity/ energy sector. Its overall purpose is to assess the potential of rice husk - fuelled bio-power development projects in Mekong delta.

    pdf0p hailedangbs 02-05-2013 32 7   Download

  • The design, construction and testing of valve-regulated lead/acid cells with grid designs optimised for high-rate partial state-of-charge cycling for hybrid electric vehicles are described. Computer modelling was used to develop the grid designs. This showed that designs with opposed tabs and terminals on the top and bottom of the cell were likely to have the best performance not only in terms of grid conductivity but also for uniformity.

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Intelligent Decision-Making System with Green Pervasive Computing for Renewable Energy Business in Electricity Markets on Smart Grid

    pdf12p sting08 20-02-2012 24 4   Download

  • The Swiss work was based on a provisional national PM10 emission inventory. It was first disaggregated to a km2 grid. Dispersion functions for primary PM10 emission were defined in an empirical dispersion model which was used to calculate the concentration of primary PM10. The contribution of secondary particles was modelled by using simple relationships between precursor and particle concentration. The long-range transported fraction was taken from European scale models. The PM10 fractions were then summed to create the PM10 map.

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  • The 1990s saw a resurgence in the windpower industry, with installed grid-connected capacity expanding more than five-fold between 1990 and 2000. Most of this increase occurred in Europe, where governmental policies aimed at developing domestic energy supplies and reducing pollutant emissions provided a sheltered market for renewable energy generation. The 1990s were also marked by a return to large, megawatt-sized wind turbines, a reduction and consolidation of wind turbine manufacturers, and increased interest in offshore windpower....

    pdf56p hailedangbs 02-05-2013 18 2   Download

  • The development of a 796 acre off shore site to provide 200 Mega watts of electricity from a vertical wind farm powered by twenty magnetically levitated 10 Mega Watt Vertical Axis Wind Turbines (VAWT). The project site’s 796 acre area can accommodate a total of up to (100) 10 Mw wind turbines. See Appendix for additional proposed wind classification 4 to 5 project sites. Phase one will begin with an off shore site feasibility study of the proposed site to provide the best wind condition information & geographic aspect analysis to achieve optimal performance.

    pdf34p loixinloi 08-05-2013 23 1   Download

  • This chapter aims at providing an overview of products and systems using batteries. Here, the term product indicates any device – small or large, portable or not – powered by a battery. The term system indicates a large installation, such as an energy storage plant to back up an electricity grid, or an extended sensor network.

    pdf385p minhtuan 04-08-2009 122 34   Download

  • From the principles of electrical engineering it is known that the 3-phase quantities of the 3-phase AC machines can be summarized to complex vectors. These vectors can be represented in Cartesian coordinate systems, which are particularly chosen to suitable render the physical relations of the machines. These are the field-orientated coordinate system for the 3- phase AC drive technology or the grid voltage orientated coordinate system for generator systems.

    pdf346p tdt_tdt123 19-08-2013 87 32   Download

  • Congratulations! You are reading a book about a technology that has changed the way we think about energy. Photovoltaics (or PV) is an empowering technology that has shown that it can generate electricity for the human race for a wide range of applications, scales, climates, and geographic locations.

    pdf0p aries23 29-09-2012 37 15   Download

  • This article covers post-prototype fuel cell (FC) systems in stationary or ‘on-site’ applications, for use in non-grid-connected dispersed generation, or grid-connected distributed generation. Both are referred to here as DG. They include a range of sizes from kilowatt to megawatt scale, and may be in combined heat and power (CHP, cogeneration or dual energy use systems), or as electricity-only units. Trigeneration (combined heat, power, and cooling) is a further possibility.

    pdf32p congdat261 23-11-2010 59 12   Download

  • The name ‘power tool’ originally describes a tool that is powered by an electrical motor. Thus, the effort needed by an operator is reduced through using this tool. Today the term ‘power tool’ or ‘cordless tool’, as it is also called sometimes, is most commonly used for an electric tool, which is powered by batteries. This makes the user independent of power outlets. Power tools include drills and screwdrivers as well as hammers, saws, grinders, etc. They replace their electric power grid– connected equivalents.

    pdf7p congdat261 23-11-2010 47 8   Download

  • Traditional electrical power systems were essentially based on centralized and fuel consuming power generation plants, where end-users were supplied via unidirectional transmission and distribution grids.

    pdf0p ktcn_1 10-07-2012 37 8   Download

  • The lead agency must also coordinate with other agencies and review security plans for infrastructure and utilities that could threaten event security (local water supply, water treatment facilities, electricity supply, communications grid, sewer system, computer systems, etc.). At some special events, manhole covers have been welded shut near the event venues. Often, newspaper dispensers and public trash cans are removed before an event (they can be hiding places for bombs and can be used as missiles to harm law enforcement or destroy property). When such measures...

    pdf29p nhacchovina 22-03-2013 24 7   Download

  • A fully integrated and interconnected European Single Market covering telecoms, energy and transport is a prerequisite for competitiveness, jobs and growth. Achieving this requires affordable, accessible, efficient and secure network infrastructure. Accelerating the roll out of the digital economy will bring benefits across all sectors, through enhanced productivity, efficiency and innovation.

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  • For most of the time, electric energy supply was based on large centralized power stations, the biggest of them located close to coal mines. Electricity distribution traditionally is done by means of high voltage power lines feeding the electricity distribution grid. With time, electric utilities became large enterprises integrating electricity generation, distribution, and customer relations. Electricity generation mainly is powered by heat engines, their efficiency being determined by the temperature difference of the work fluid.

    pdf16p congdat261 23-11-2010 44 5   Download

  • At this point in our industry’s evolution, it’s important to have government involvement. Incumbent technologies, such as internal combustion engines for transportation and the electrical power grid, have a huge head start and, in many cases, the rules of the game are written to support their continuation. Our society is comfortable with these technologies and has depended on them for many generations. Because we are not yet producing products at high volume, we are often faced with an initial cost disadvantage compared to traditional, less sustainable power generation methods.

    pdf89p yeurauxanh88 28-09-2012 19 5   Download

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