Sökning: "turbine passage"

Visar resultat 1 - 5 av 17 uppsatser innehållade orden turbine passage.

  1. 1. Fish Friendly Turbines forDownstream Migration : Literature review and case studies

    Master-uppsats, KTH/Hållbar utveckling, miljövetenskap och teknik

    Författare :Signe Rosenblad; [2023]
    Nyckelord :Downstream passage solutions; downstream migration of fish; small-scale hydropower; eel; trout; Nedströms passagelösningar; nedströms vandring av fisk; småskalig vattenkraft; ål; öring;

    Sammanfattning : As the energy consumption is constantly increasing, the demand of renewable energy is increasing too. Thirtythree percent of the renewable energy production in Europe constitutes of hydropower. Hydropower is animportant energy source as it has stabilizing and storing functions, but it heavily affects biodiversity. LÄS MER

  3. 2. Downstream migration and survival of Atlantic salmon (Salmo salar L.) kelts and fallbacks when passing a hydropower plant

    Master-uppsats, SLU/Dept. of Wildlife, Fish and Environmental Studies

    Författare :Frans Byström; [2020]
    Nyckelord :migration; kelt; iteroparous; anthropogenic obstacle; survival; turbine passage;

    Sammanfattning : Repeat spawners of Atlantic salmon may be of great importance for population stability, the return spawners can significantly contribute to recruitment of juveniles. To have a significant proportion of repeat spawners in the population, it is necessary that salmons can successfully migrate back to the sea after spawning upriver. LÄS MER

  4. 3. Experimentell parameterstudie av bubbelridåer i syfte att avleda fisk

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Institutionen för fysik och astronomi

    Författare :Gustav Wendin; [2019]
    Nyckelord :Bubble curtains; bubble screens; fish-diversion; Bubbelridåer; fiskavledning; miljöanpassning av vattenkraft;

    Sammanfattning : 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

  5. 4. Preliminary simulation of Porjus U9 turbine at speed no load

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Författare :Henrik Holmström; [2019]
    Nyckelord :Kaplan; Speed no-load; SNL;

    Sammanfattning : Hydropower plants are shifting towards operating at off-designed conditions, meaning that the number of start-stop cycles and maintenance time due to cavitation increases. The speed no-load condition is the moment before magnetization of the generator, i.e., no load, low flow, constant runner rotational speed, guide vane and runner blade angle. LÄS MER

  7. 5. CFD calculations and comparison with measured data in a film cooled 1.5 stage high pressure test turbine : With two configurations of swirlers clocking

    Master-uppsats, Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

    Författare :Ellen Hallbäck; [2018]
    Nyckelord :Turbine; CFD; Clocking configuration; Turbin; CFD; virvlareposition;

    Sammanfattning : The gas turbine has an important role for the energy distribution due to its stability and flexibility. By increasing turbine inlet temperature (TIT) an increased thermal efficiency of the turbine can be achieved. The biggest limitation of the TIT is the material of the turbine components. LÄS MER