The world's largest fully water cooled hydro generators in the Bieudron Power Plant (Switzerland)
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In 1993 the owner of the Val des Dir dam in Switzerland decided to increase the peak energy production by adding a new power station to the existing storage lake. In the article, the history of the project, the specification for the generators as well as the technical solution provided are described. Further on, the first results of the measurements done during commissioning are presented. The generators in the Bieudron power station are the world's largest fully water cooled machines in operation.Keywords:
Hydroelectricity
Hydroelectricity is important to the nation, as about 7% of the total power is produced by hydroelectric plants. Hydropower does not pollute the water or the air. However, hydropower facilities can have large environmental impacts by changing the environment and affecting land use, homes, and natural habitats in the dam area. In the early part of the 20th century hydroelectric plants supplied a bit less than one-half of the nation's power, but the number is down to about 10% today. In the United States, most states make some use of hydroelectric power, although, as you can expect, states with low topographical relief, such as Florida and Kansas, produce very little hydroelectric power. But some states such as Idaho, Washington, and Oregon use hydroelectricity as their main power source. China has developed large hydroelectric facilities in the last decade and now leads the world in hydroelectricity usage.
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Abstract The author discusses hydroelectric development in the United States from the earliest installation up to the present time. He points out that hydroelectric plants added to large power systems in this country during the past 15 years have been constructed because they have appeared to be more economical than thermal-electric plants for adding the same number of kilowatts to the same power system, excepting the construction of hydroelectric plants in those sections of the country where hydroelectric plants can compete with thermal electric plants in producing power and energy at the load factor of the utility loads. The author also discusses the design of equipment used in the older and in the more recent hydroelectric installations. The paper includes a list of the major hydroelectric installations in the United States together with their present rating and ultimate capacity.
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A recent water crisis that befell over several states in Brazil negatively affected hydroelectric plants energy production once rainfall regime exerts a major influence in predominantly hydraulic power systems. This paper analyses the correlation between power generation and data collected from tributary flow, reservoir level, standardized precipitation index (SPI) on hydroelectric plants located in the Sao Francisco river basin. The analysis is performed by Pearsons Coefficient of Correlation, for a period of 28 years that includes the dry season, and for the dry season separately. The results showed weak and moderate correlation coefficients between SPI and generation for both analyzed periods with slightly higher correlations in the last years when a decrease in power generation is observed. The correlations found between the affluent flow, reservoir level, and the generation were influenced by the reservoir characteristics, and were slightly higher than those of the dry periods.
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Abstract—Hydroelectric power, one of the most important
sources of mass generation of electric power, is a renewable
source of energy. The amount of electricity that can be
produced by a hydro-electricity generating system depends on
systemic variables viz; plant efficiency, volumetric water flow
through the turbine and the head of the water from the water
surface to the turbine. The availability of the Water in the
reservoir is a function of some hydrological variables principal
among which are rainfall, reservoir inflows and evaporation.
Understanding the dynamics of these variables, and the
correlation between them are core to proper planning and
management of a hydroelectric power station. In this Study,
simple mathematical methods that include linear programming
and statistical analysis based on simulation techniques were
used to evaluate vital parameters based on the hydrologic data
obtained from the Hydrologic Units of the Shiroro Power
Stations in Nigeria. The overall aim of the study is to idealize
power generation at Shiroro dam in and out of rain season so
as to ensure optimum generation of electricity all year round in order
to achieve energy sufficiency in Nigeria.
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Due to recent abrupt climate change and the environmental contamination, the interest in the renewable energy increases, and various types of renewable energy generation systems have been replacing the existing old ones using fossil fuels. Hydroelectric power generation is traditionally one of those clean energy solutions. Recently, new hydroelectric power generation from municipal water systems has been developed and regarded as a new or replaceable water system of new and old cities. In this paper, basic architecture of hydroelectric power generation from water pipes and information modeling is proposed in terms of management.
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Many of Iran's steam power plants are old and inefficient. Repowering as an experimented and generable way can be an effective method for reconstruction of the old steam power plants. According to the power plant specifications, there are different repowering methods. In this paper, overall conditions have been considered for choosing the most appropriate method. Thermo-economical parameters are calculated for repowering a number of Iran power plants. Expenses for repowering an existing power plant are compared with those of establishing a new gas turbine plant or a combined power plant cycles. The cost of electricity generation are calculated and compared for three different scenarios: repowering of the steam power plant, building a new gas turbine power plant and building a combined cycle power plant. The results show that repowering options not only have considerable capacity for upgrading, but also provide the lowest cost of electricity generation.
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Rolls-Royce has joined forces with Foster Wheeler to offer a modern power plant that integrates the benefits of coal gasification with the efficiency advantages of combined-cycle power generation. Powered by fuel gas from two parallel Lurgi slagging gasifiers, the 150-MW power station employs two Rolls-Royce SK60 gas-turbine generating sets. The proposed plant is designed for continuous power generation and should operate efficiently down to one-third of its rated capacity. Rolls estimates that the installed cost for this station would be lower than that for a conventional coal-fired station of the same output with comparable operating costs. Cooling water requirements would be less than half those of a coal-fired station.
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Abstract The main goal of this study is to forecast total electricity and hydroelectricity energy generation using historical electricity energy production data in order to determine the future level of electricity and hydroelectricity energy generation in Turkey. For this purpose, Turkey's electricity energy sector was reviewed during the period of 1940–2005. The total electricity and hydroelectricity energy generation were then modelled using historical energy generation data as years with regression analysis. Additionally, the portion that hydroelectric energy generation of Turkey has within total electricity energy production and probable meeting capacity of Turkey's hydroelectric potential of its future total demand was determined. According to the results, it is deduced that hydropower energy will have portion of 13.6% within the total electricity energy generation in 2030. In addition, it is concluded that the whole of Turkey's technical and economical hydroelectric energy potential that is equal 129.9 billion kWh will be used in the year of 2102 if the current trend continues.
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The Wanjiazhai hydropower project has changed the natural condition of the yellow river, and has effects on regular running and management of Tianqiao hydroelectric power plant, the paper analyes the measures which should be taken by Tianqiao hydroelectric power plant, and gives advices to the optimization and overall planning of the management of the electric network.
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Operational planning
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