Sökning: "Mechanical cleaning"

Visar resultat 1 - 5 av 69 avhandlingar innehållade orden Mechanical cleaning.

  1. 1. Numerical analysis of coalescence-induced jumping droplets on superhydrophobic surfaces

    Författare :Konstantinos Konstantinidis; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; jumping droplets; immersed boundary; CFD; surfaces; superhydrophobic; contact angle; VOF; coalescence; self-cleaning; wetting; hysteresis;

    Sammanfattning : Bio-inspired superhydrophobic surfaces are used in numerous technological applications due to their self-cleaning ability. One of the several mechanisms reported in literature and responsible for self-cleaning is the phenomenon of coalescence-induced jumping of droplets from such surfaces. LÄS MER

  3. 2. Design and Operation of a Chemical-Looping Reformer for Catalytic Upgrading of Biomass-Derived Gas

    Författare :Fredrik Lind; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Biomass gasification; Moisture measurements; Biomass combustion; Oxygen carriers; Ilmenite; Catalytic gas cleaning; CFB; Tar cleaning;

    Sammanfattning : AbstractThe removal of tar from the raw gas produced during biomass gasification is necessary before the gas can be used as a feedstock for synthetic fuels. The currently commercially available technologies for gas cleaning, i.e. LÄS MER

  4. 3. Measuring and Modelling PM Levels on Underground Platforms

    Författare :Minghui Tu; Ulf Olofsson; Teresa Moreno; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Airborne particles; railway; underground platform; particle concentration; effect factor; Luftburna partiklar; järnväg; underjordisk plattform; partikelkoncentration; effektfaktor; Machine Design; Maskinkonstruktion;

    Sammanfattning : Urban railways have become an essential part of the transportation network of cities due to their convenience and high capacity. To make full use of urban space, many urban railway platforms are built underground. LÄS MER

  5. 4. Alternatives to pickling : preparation of carbon and low alloyed steel wire rod

    Författare :Peter Gillström; Magnus Jarl; Sven-Erik Lundberg; Tarras Wanheim; Örebro universitet; []
    Nyckelord :Mechanical descaling; shot blasting; pickling; steel wire rod; wear; drawing; Mechanical engineering; Maskinteknik; Maskinteknik; Mechanical Engineering;

    Sammanfattning : A well established method for scale removal on hot rolled wire rod is pickling. To avoid pollution problems, the wire rod can be mechanically descaled. By this method, the removed scale can be recirculated to the blast furnace. In batch pickling considerable energy is necessary; e. LÄS MER

  7. 5. Arbetsmiljö, arbetsdelning, utslagning : en studie av städarnas arbetsförhållanden

    Författare :Hakon Ahlstrand; Peter Lidehäll; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Industrial Work Environment; Industriell produktionsmiljö;

    Sammanfattning : Det dominerande inslaget i det här avhandlingsarbetet är det omfattande empiriska material, som utgör grunden för vår beskrivning och analys av städarbetet och städarnas arbetsförhållanden. I den beskrivning som vi gör strävar vi efter att redovisa en helhetsbild av arbetsmiljön. LÄS MER