Search for dissertations about: "Hydroelectric turbines"
Showing result 1 - 5 of 6 swedish dissertations containing the words Hydroelectric turbines.
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1. Transients in high head Francis turbines
Abstract : On demand energy market and favourable government policies to encourage the usage of renewable energy have led to a dramatic increase of grid connected wind, solar, and other power in recent years. Penetration of the power above manageable limit, produced using intermittent energy sources, to meet the demand has induced instable grid operations. READ MORE
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2. Numerical modeling of deforming bubble transport related to cavitating hydraulic turbines
Abstract : Cavitation is a problem in many hydroelectric power plants since it can cause adverse effects on performance and damage to nearby solid surfaces. The concerns of this thesis are the numerical aspects of flow simulations in cavitating hydraulic turbines which contain several difficulties: turbulent and complex flows, steady and moving parts of the geometry, bubble transport and cavitation development. READ MORE
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3. Analysis of Structural Dynamic Properties and Active Vibration Control Concerning Machine Tools and a Turbine Application
Abstract : Vibration in metal cutting is a common problem in the manufacturing industry, especially when long and slender tool holders or boring bars are involved in the manufacturing process. Vibration has a detrimental effect on machining. In particular the surface finish is likely to suffer, but tool life is also most likely to be reduced. READ MORE
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4. Sliding bearings for hydropower applications : novel materials, surface texture and EALs
Abstract : Hydropower, the utilisation of water as a means of driving machinery, has been used for many centuries. Today, the great power of water is being harnessed to generate as much as 20% of worldwide electricity. The requirement for reliable and efficient electricity generation needs to be matched by environmental awareness on the part of the industry. READ MORE
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5. Lubrication of sliding bearings for hydropower applications
Abstract : The term "sliding bearing" refers to types of bearing where two conformal surfaces (usually the stationary bearing and a moving shaft) slide relative to one another with load distributed directly across the interface. A suitable lubricant may be employed to reduce the friction between these two surfaces. READ MORE