Sökning: "hydraulic head"

Visar resultat 1 - 5 av 42 uppsatser innehållade orden hydraulic head.

  1. 1. The design of a hydraulic equalizer bar for the feeding mechanism on forest harvester heads

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

    Författare :Arvid Söderlund; [2023]
    Nyckelord :Harvester; Harvester head; Komatsu Forest; Hydraulics; Equalizer bar; Parallellstag; Stag; Skogsmaskin; Skördare; Aggregat; Skog;

    Sammanfattning : Due to the importance of a correct tree placement and the wear that occurs to equalizer bars inharvester heads, Komatsu Forest AB in Umeå was interested if the bar could be replaced with ahydraulic system. According to Komatsu, the problems were that the equalizer bars that are responsible forsynchronizing the delimbing knives and feeding mechanism add weight, take up space and have atendency to break before their life expectancy. LÄS MER

  3. 2. Dimensioning study of EPR2 fuel pool cooling system

    Master-uppsats, KTH/Fysik

    Författare :Thomas Rubler; [2023]
    Nyckelord :EPR2; PTR; spent fuel pool; heat exchange; EPR2; PTR; bassäng för utbränt kärnbränsle; värmeväxling.;

    Sammanfattning : The PTR system allows the EPR2 fuel pool to be cooled. The evacuation of the residual power fromthe pool is ensured by several heat exchangers and pumps, which have to be dimensioned in order to meetdifferent requirements.In order to dimension them, the worst-case scenario of the components must first be determined. LÄS MER

  4. 3. Mot elektrifiering av matarverk för bandmaskin

    Uppsats för yrkesexamina på grundnivå, Umeå universitet/Institutionen för tillämpad fysik och elektronik

    Författare :Lindgren Emil; [2022]
    Nyckelord :Teknik; hydraulik; elektrifiering.;

    Sammanfattning : Inom valsverksindustrin används bandmaskiner av olika slag för att emballerastångbuntar, trådringar eller plåtrullar innan de ska förvaras eller transporteras. Debandmaskiner som Sund Birsta i dagsläget erbjuder är hydrauliskt drivna. Det haruppkommit ett behov att kunna erbjuda kunder elektriska motsvarigheter. LÄS MER

  5. 4. Numerical simulations of pore pressure on concrete buttress dams

    Master-uppsats, KTH/Betongbyggnad

    Författare :Mohammed Abdi; Dimitirios Ntzimanis; [2022]
    Nyckelord :Porepressureanalysis; upliftpressure; buttressdams; drainage; groutcur- tain; rockfractures; damsafety; RIDAS.;

    Sammanfattning : Uplift pressure is one of the most dominant forces on a dam structure. Difference in head water and tail water creates a hydraulic gradient resulting an upward oriented pressure called uplift pressure, which reduces the dam safety against sliding. LÄS MER

  7. 5. An Overview of State-of-the-art Hydraulic Conductivity Measurements in Coarse Grained Materials

    Kandidat-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Jakob Andrén; [2021]
    Nyckelord :hydraulic conductivity; permeability; embankment dam; coarse grained; flow regime; hydraulisk konduktivitetsmätning; permeabilitet; fyllnadsdamm; grovkorniga material; flödesregim;

    Sammanfattning : Embankment dams are made from soil materials of varying sizes and widely used all over the world.When constructing these, knowing the hydraulic conductivity (K) of the soil materials is a keyparameter in order to construct safe embankment dams. A knowledge gap regarding K measurementsin coarse grained soils has been identified. LÄS MER