Sökning: "Small Hydropower"

Visar resultat 21 - 25 av 33 avhandlingar innehållade orden Small Hydropower.

  1. 21. Habitat compensation in nature-like fishways : Effects on benthos and fish

    Författare :Stina Gustafsson; Olle Calles; Martin Österling; Jostein Skurdal; Paul Giller; Karlstads universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biocanal; biodiversity; brown trout; freshwater pearl mussel; functional feeding groups; habitat heterogeneity; large woody debris; macroinvertebrates; PIT-tag; salmonids; Biology; Biologi;

    Sammanfattning : The construction of nature-like fishways has become an increasingly common measure to restore longitudinal connectivity in streams and rivers affected by hydroelectric development. These fishways also have the potential to function as habitat compensation measures when running waters have been degraded or lost. LÄS MER

  3. 22. An experimental approach to energy storage based synthetic inertia and fast frequency regulation for grid balancing

    Författare :Martin Fregelius; Urban Lundin; Roy Nilsen; Uppsala universitet; []
    Nyckelord :Renewable energy; Synthetic inertia; Enhanced inertia; Energy storage system; Hybrid energy storage system; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

    Sammanfattning : The increasing interest in renewable energy has significantly increased in the last decades. The increasing amount of variable renewable energy resources in the grid, which are connected via power electronics, reduces the total mechanical system inertia. LÄS MER

  4. 23. Characterization of dye-sensitized solar cells : Components for environmentally friendly photovoltaics

    Författare :Hanna Ellis; Anders Hagfeldt; Gerrit Boschloo; Erik Johansson; Maria Hahlin; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; solar cells; dye-sensitized solar cells; Chemistry with specialization in Physical Chemistry; Kemi med inriktning mot fysikalisk kemi;

    Sammanfattning : As fossil fuels, the major source of energy used today, create the greenhouse gas carbon dioxide which causes global warming, alternative energy sources are necessary in the future. There is a need for different types of renewable energy sources such as hydropower, windpower, wave- power and photovoltaics since different parts of the world have different possibilities. LÄS MER

  5. 24. Magnetic Leakage Fields and End Region Eddy Current Power Losses in Synchronous Generators

    Författare :Birger Marcusson; Urban Lundin; Göran Engdahl; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; magnetic leakage fields; leakage flux; eddy currents; losses; synchronous generator; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

    Sammanfattning : The conversion of mechanical energy to electrical energy is done mainly with synchronous generators. They are used in hydropower generators and nuclear plants that presently account for about 80% of the electric energy production in Sweden. LÄS MER

  7. 25. Advancing the state of geospatial electrification modelling: New data, methods, applications, insight and electrification investment outlooks

    Författare :Alexandros Korkovelos; Viktoria Martin; Mark I. Howells; Francesco Fuso Nerini; Hans-Holger Rogner; Ed Brown; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energiteknik; Energy Technology;

    Sammanfattning :  I skrivande stund uppskattas 860 miljoner människor globalt sakna tillgång till el. Målet att uppnå universal tillgång till el under det kommande decenniet – i enlighet med mål 7 av de globala målen för hållbar utveckling (SDG 7) – indikerar att många länder snart kommer att behöva införa riktlinjer, handlingsplaner och policys för att påskynda elektrifieringstakten. LÄS MER