Sökning: "S2 material"

Visar resultat 1 - 5 av 16 uppsatser innehållade orden S2 material.

  1. 1. Burn or Return? Evaluating Deposit Return Systems for Plastic Packaging Waste in Sweden : A Comparative Life Cycle Assessment

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

    Författare :Martin Forsman Hedman; [2022]
    Nyckelord :Resource management; reuse; deposit return scheme; circular economy; polypropylene;

    Sammanfattning : Plastics have become an integral part of modern life and global use is expected to grow almost two- fold until 2040. 40% of European demand for plastic raw materials is driven by the packaging industry and being a cheap material, focus on waste management has historically been neglected. LÄS MER

  3. 2. Micromechanical modelling of creep in wooden materials

    Kandidat-uppsats, Uppsala universitet/Tillämpad mekanik

    Författare :Oskar Falkeström; Kevin Coleman; Malin Nilsson; [2021]
    Nyckelord :Creep; RVE; Homogenization; Honeycomb; Tracheid; Comsol Multiphysics; Micromechanical modelling; Orthotropic; Parametric study; S2 material; Norwegian Spruce; Scots Pine; Cell geometry;

    Sammanfattning : Wood is a complex organic orthotropic viscoelastic material with acellular structure. When stressed, wood will deform over timethrough a process called creep. Creep affects all wooden structureand can be difficult, time-consuming and expensive to measure. For this thesis, a simple computer model of the woodenmicrostructure was developed. LÄS MER

  4. 3. Sinperiodens inverkan på nästkommande laktation : hur vanliga produktionssjukdomar kan förbyggas

    Kandidat-uppsats, SLU/Dept. of Biosystems and Technology (from 130101)

    Författare :Tilde Larsson; Elisabet Nilsson; [2021]
    Nyckelord :dry cow; dry period; dry cow management; dry cow feeding; acetonemia; ketosis; displaced abomasum; dry cow fertility; fatty liver; hypokalcemia;

    Sammanfattning : I takt med att avkastningen hos mjölkkor ökat på grund av förbättrade avelsstrategier och bättre management har också produktionssjukdomarna fortsatt vara närvarande, framför allt vid tiden runt kalvning. Vid denna tid är kon extra utsatt på grund av att hon ofta drabbas av negativ energibalans vilket kan leda till fysiologiska och biokemiska förändringar i kroppen. LÄS MER

  5. 4. Energy-efficient Industrial processes : An investigation in the power consumption, power number, thrust force and torque requirement on a rotating bed reactor

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

    Författare :Kasim Ali Haji; [2021]
    Nyckelord :RBR Simulation; CFD models of an RBR; Energy-efficient Industrial processes; Power number; Power consumption; RBR; rotating bed reactor; Experimental and simulation of an RBR; Empirical models of an RBR; Thrust force; Torque requirement; k-epsilon model of an RBR; SST k-omega model of an RBR.;

    Sammanfattning : Rotating bed reactors are used throughout the process industry. They are usedboth in the chemical industry and other industrial sectors, such as pharmaceuticals and the textile industry in decolorization due to by-products or contaminants.SpinChem AB manufactures rotary bed reactors (RBRs) to perform chemical reactions between liquids and solids. LÄS MER

  7. 5. Investigation of Cu and Zn interactions with ilmenite during waste incineration

    H-uppsats,

    Författare :Elin Borgman; [2020-06-08]
    Nyckelord :FactSage; copper; zinc; major ash elements;

    Sammanfattning : In 2018, approximately 2.01 billion tons of waste was generated in the world. By 2050, this number is expected to increase drastically to 3.40 billion tons of waste annually as lower income countries develop and the world population increases (Kaz, Yao, BhadaTata, & Van-Woerden, 2018). LÄS MER