Sökning: "WS2"

Visar resultat 1 - 5 av 6 uppsatser innehållade ordet WS2.

  1. 1. Additives in a steam engine to decrease friction : Friction testing of solid lubricants in powder form

    Master-uppsats, Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

    Författare :Viktor Lange; [2023]
    Nyckelord :Tribology; friction; wear; steam; steam engine; ranotor; invencon; invencon AB; steel; contact mechanics; hexagonal boron nitride; molybdenum disulfide; tungsten disulfide; lubricants; solid lubricants; Tribologi; friktion; nötning; ånga; ångmotor; stål; kontaktmekanik; smörjning; smörjmedel; fasta smörjmedel;

    Sammanfattning : This thesis aims to investigate the coefficient of friction between steel on steel contacts with the addition of solid lubricants such as h-BN, WS2, MoS2 in powder form, in dry conditions and wet conditions. More specifically, the purpose is to enhance the sliding between the piston rings and cylinder block in a modern high temperature steam engine developed by RANOTOR. LÄS MER

  3. 2. A study of the triboelectricity of 2D materials: MoS2, WS2 and MoO3 : Analyzing measurements from a triboelectric nanogenerator

    Kandidat-uppsats, Mittuniversitetet/Institutionen för naturvetenskap

    Författare :Simon Kilman; [2022]
    Nyckelord :2D-material; MoS2; WS2; MoO3; triboelektrisk nanogenerator; TENG; triboelektrisk effekt; triboelektrisk serie; kontaktelektrifiering.;

    Sammanfattning : Detta projekts mål har varit att undersöka tre olika 2D-materials triboelektriska egenskaper och därmed placera dem i en triboelektrisk serie. Detta utfördes genom att använda en triboelektrisk nanogenerator (TENG) och mäta den resulterande spänningen. Tio stycken motmaterial applicerades mot varje 2D-material på nanogeneratorn. LÄS MER

  4. 3. Tribological studies on multifunctional hardfacings for friction control at high temperatures

    Master-uppsats, Luleå tekniska universitet/Maskinelement

    Författare :Todor Vuchkov; [2017]
    Nyckelord :high temperature tribology; laser cladding; solid lubricants;

    Sammanfattning : Mechanical components operating at elevated temperatures can be identified in the aerospace industry as well as in metal forming. Hot stamping is a metal forming technique utilized for manufacturing high strength lightweight components for the automotive industry. LÄS MER

  5. 4. Human subjective response to combined radiant and convective cooling by chilled ceiling combined with localized chilled beam

    Master-uppsats, Högskolan i Gävle/Avdelningen för bygg- energi- och miljöteknik

    Författare :Taha Arghand; [2015]
    Nyckelord :Localized chilled beam; Chilled ceiling; Thermal comfort; Individual control; Micro-environment; Human response;

    Sammanfattning : The aim of the present research is to identify human subjective response (health and comfort) to the micro-thermal environment established by integration of individually controlled localized chilled beam and chilled ceiling (LCBCC) system and to compare its performance with the performance of mixing ventilation combined with chilled ceiling (CCMV).Experiments were carried out in mock-up of an office (4. LÄS MER

  7. 5. Modeling the air change rate in a naturally ventilated historical church : MultipleLinear Regression analysis

    Magister-uppsats, Akademin för teknik och miljö

    Författare :Saioa Goicoechea; Patricia López; [2012]
    Nyckelord :Natural ventilation; Modelling; Multiple Linear Regression; Churches;

    Sammanfattning : In this thesis the air infiltration through the envelope of a naturally ventilated stone church located in Bergby (Gävle, Sweden) is studied. The project is focused on Multiple Linear Regression (MLR) modeling the air change rate (ACH) inside the church hall and studying the factors (stack effect and wind effect) that influence the air infiltration. LÄS MER