Sökning: "hydro turbine"
Visar resultat 21 - 25 av 31 avhandlingar innehållade orden hydro turbine.
21. Tribology of journal bearings under environmentally adapted lubrication with shaft oscillation
Sammanfattning : To make the hydro power application more environmentally adapted new EALs such as synthetic esters will replace the existing mineral oils. This study aims to exploit the EALs potential in boundary lubrication, especially in slow sliding journal bearings with shaft oscillation as those supporting the Kaplan turbine blades. LÄS MER
22. Extremum Seeking Control : Stability, Accuracy, and Applications
Sammanfattning : In many applications, there is a variable that indicates the overall performance and that must be maximized, such as the output of a hydro power turbine or a mineral processing plant, or that must be minimized, such as CO2 emissions or the consumption of resources. Extremization of this variable (maximization or minimization) through adjusting the influencing manipulated variables is occasionally required without prior knowledge of the optimal values of the manipulated variables or of the optimized variable. LÄS MER
23. Transients in high head Francis turbines
Sammanfattning : 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. LÄS MER
24. An experimental investigation of flow in a Kaplan runner : steady-state and transient
Sammanfattning : Water turbines are since some years widely used for grid stabilization purposes according to their exceptional load variation capability which gives them the ability to compensate grid fluctuations initiated by the customer’s consumption or intermittent electricity production systems such as wind and solar power. Different renewable power generation technologies can be combined in mini-grids to electrify isolated villages and extend existing grid networks. LÄS MER
25. A sensitivity analysis of the Winter-Kennedy method
Sammanfattning : Hydropower is among the lowest-cost electrical energy sources due to its long lifespan and lower operation and maintenance cost. The hydro-mechanical components of hydropower plants generally last about four to five decades, then they are either overhauled or replaced. LÄS MER