Sökning: "ice load"

Visar resultat 21 - 25 av 33 avhandlingar innehållade orden ice load.

  1. 21. Simulation and Design of a Radial-Radial Four-Quadrant Transducer for Hybrid Electric Vehicles

    Författare :Erik Nordlund; KTH; []
    Nyckelord :Electrical Machines; Hybrid Vehicles;

    Sammanfattning : This report is my licentiate thesis at the Royal Instituteof Technology, (KTH) in Stockholm. The work was done at thedepartment of Electrical Engineering, division of ElectricalMachines and Power Electronic.An internal combustion engine (ICE) in a conventionalvehicle operates rarely at optimum efficiency. LÄS MER

  3. 22. Small wetlands designed for phosphorus retention in Swedish agricultural areas : efficiency variations during the first years after construction

    Författare :Pia Geranmayeh; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This thesis examined retention of particles and phosphorus (P) losses from agricultural clay soils in small wetlands with an initial deep area followed by a shallow area with emergent plants. Two long, narrow wetlands (Bergaholm and Nybble) specially designed for P retention (P-wetlands) were constructed, and their efficiency in sediment accumulation were compared with those of six existing wetlands with a different design. LÄS MER

  4. 23. Railway Open System Tribology

    Författare :Yezhe Lyu; Ulf Olofsson; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wheel; Rail; Brake; Environmental conditions; Tribology; Noise; Particle; Hjul; Räl; Broms; Miljöförhållanden; Tribologi; Ljud; Partiklar; Machine Design; Maskinkonstruktion;

    Sammanfattning : Tribology in the railway system is of increasing interest in the new railway era due to the demand for higher speed and load capacity. Since railway vehicles operate in an open environment, their performance depends greatly on temperature, humidity and natural and artificial contaminants. LÄS MER

  5. 24. Development and Test of an Imaging Instrument for Measurement of Water Droplets in Icing Conditions

    Författare :Stefani Alita Leona Rydblom; Benny Thörnberg; Aimé Lay-Ekuakille; Mittuniversitetet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Icing measurements; field study; shadowgraph imaging; edge detection; LWC; MVD.;

    Sammanfattning : Structural icing is a persistent challenge for the production of renewable energy from wind. It is mainly caused by supercooled atmospheric droplets of water, which are very common in cold climates. In the most exposed wind parks in Sweden, more than 10 per cent of annual energy production can be lost. LÄS MER

  7. 25. Reliability-based evaluation of concrete dams

    Författare :Marie Westberg; Avdelningen för Konstruktionsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; spatial correlation; assessment; concrete dam; uplift; structural reliability analysis; existing structure;

    Sammanfattning : Swedish concrete dams are designed and assessed based on deterministic design using safety factors. The combination of increasing age, new methods for calculation of design floods and increasing demands by society to ensure a high level of safety, has resulted in upgrading and rebuilding needs for dams. LÄS MER