Sökning: "A gap in the grid"

Visar resultat 6 - 10 av 28 avhandlingar innehållade orden A gap in the grid.

  1. 6. Renewable Energy Market for Rural Electrification in Developing Countries: Country Case Nepal

    Författare :Brijesh Mainali; Semida Silveira; Björn Kjellström; KTH; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; renewable energy; rural electrification; off-grid; financing; subsidy; credit; equity; market; extensive growth; intensive growth; INTERDISCIPLINARY RESEARCH AREAS; TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP;

    Sammanfattning : The availability of abundant renewable resources, lack of fossil fuels and difficult geographical terrain for grid line extensions contribute to the advantages of renewable based decentralized rural electrification in Ne-pal. Solar home system (SHS) and micro-hydro are the most commonly adopted off-grid renewable energy technologies in the country. LÄS MER

  3. 7. A Generator Perspective on Vertical Axis Wind Turbines

    Författare :Fredrik Bülow; Hans Bernhoff; Jens Sørensen; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; VAWT; PM generator; Wind power; Stator core loss;

    Sammanfattning : The wind energy conversion system considered in this thesis is based on a vertical axis wind turbine with a cable wound direct drive PM generator. Diode rectifiers are used to connect several such units to a single DC-bus and a single inverter controls the power flow from the DC-bus to a utility grid. LÄS MER

  4. 8. Enabling Solutions for Integration and Interconnectivity in Millimeter-wave and Terahertz Systems

    Författare :Ahmed Adel Hassona; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Integration; Interconnects; Waveguide transitions; Embedded Wafer Level Ball Grid Array eWLB ; Electromagnetic band-gap EBG ; Millimeter waves; Packaging; Terahertz; Monolithicmicrowave integrated circuit MMIC ;

    Sammanfattning : Recently, Terahertz (THz) systems have witnessed increasing attention due to the continuous need for high data rate transmission which is mainly driven by next-generation telecommunication and imaging systems. In that regard, the THz range emerged as a potential domain suitable for realizing such systems by providing a wide bandwidth capable of achieving and meeting the market requirements. LÄS MER

  5. 9. Stellar Winds of Cool Giants : Investigating the Mass-Loss Mechanism of AGB Stars

    Författare :Sofie Liljegren; Susanne Höfner; Kjell Eriksson; Bernd Freytag; Hans Olofsson; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; late-type stars; AGB stars; stellar winds; stellar atmospheres; dust; stellar pulsation; hydrodynamics; radiative transfer;

    Sammanfattning : Asymptotic giant branch (AGB) stars are luminous cool giants of low to intermediate mass that are strongly pulsating and non-spherical, with heavy mass loss through a stellar wind. The mass loss makes these stars important for galactic chemistry, as the wind enriches the interstellar medium with new elements and dust, and it determines the final fate of these stars. LÄS MER

  7. 10. Studies of Gas Disks in Binary Systems

    Författare :Miguel de Val Borro; Pawel Artymowicz; William Benz; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Astronomy; Astronomy; Astronomi; Astronomy; astronomi;

    Sammanfattning : There are over 300 exoplanets detected through radial velocity surveys and photometric studies showing a tremendous variety of masses, compositions and orbital parameters. Understanding the way these planets formed and evolved within the circumstellar disks they were initially embedded in is a crucial issue. LÄS MER