Sökning: "vattenkraft fysik"
Visar resultat 1 - 5 av 11 uppsatser innehållade orden vattenkraft fysik.
1. Simplified Model For Simulation of Fault Ride Through at Hydropower Units
Master-uppsats, Uppsala universitet/Institutionen för fysik och astronomiSammanfattning : As new requirements for grid connected generators were implemented, the requirements for evaluating the Fault Ride Through capabilities of the generators became stricter. When refurbishing a power unit, proof that the power unit meet the requirements must be submitted to the authorities. LÄS MER
2. COMPUTATIONAL FLUID DYNAMICS MODELING FOR BENT SPILLWAY CHANNEL : Numerical validation of a small scale physical model
Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för tillämpad fysik och elektronikSammanfattning : Hydropower plants with spillways exposed to high pressures because of large discharges can result in a dam failure which ultimately results in devastating consequences. Therefore properly designed and constructed spillways are important. LÄS MER
3. Experimentell parameterstudie av bubbelridåer i syfte att avleda fisk
Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Institutionen för fysik och astronomiSammanfattning : Bubble curtains offer a potential solution for hindering downstream migrating fish from passing through the turbines of hydropower plants, by instead guiding them to a safe passage. Compared to the conventional method of using low-inclined bar racks close to the turbine intake, bubble curtains are considerably cheaper, especially for large scale hydropower plants. LÄS MER
4. Analys av tryckmätningar i Kaplanturbiner
Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Institutionen för fysik och astronomiSammanfattning : In a risk situation the flow through a hydropower turbine must be reduced under a short amount of time. The reduction in flow causes low pressures in the region called draft tube under the runner in the turbine. If the pressure drops below vapor pressure the water in the turbine may evaporate and form large cavities. LÄS MER
5. Bubble curtains with vertical tubes : A way to deter fish from hydro power intakes
Master-uppsats, Umeå universitet/Institutionen för tillämpad fysik och elektronikSammanfattning : This project was performed on assigment of Vattenfall R&D in Älvkarleby. The project was a first step in evaluating whether bubble curtains with vertical tubes could be suitable for diverting fish from hydro power intakes into fish passages. LÄS MER