Sökning: "Accelerated ageing"

Visar resultat 1 - 5 av 12 uppsatser innehållade orden Accelerated ageing.

  1. 1. Service life study of environmentally friendly lubricants.

    Master-uppsats, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Författare :Marybeth Chetachukwu Ugoh; [2023]
    Nyckelord :Base oil; Ageing; Glycerol; PPG; PEG; Squalene; Rapeseed oil; Ester; Paraffin; Oxidation; FTIR;

    Sammanfattning : Environmentally friendly lubricants are in demand in response to the rising concerns and restrictive legislation that surround the use of mineral oil lubricants. One area of importance is understanding the service life of the environmentally friendly base oils of these non-toxic, biodegradable and renewable alternatives. LÄS MER

  3. 2. Evaluation of real drive data of a refuse fuel cell truck

    Master-uppsats, KTH/Kemiteknik

    Författare :Hampus Eurén; [2023]
    Nyckelord :Fuel cells; hydrogen; refuse truck; accelerated stress test; degradation; Bränsleceller; vätgas; sopbil; accelererat åldringstest; åldring;

    Sammanfattning : Ett konsortium bestående av Scania, JOAB, Powercell, KTH och Renova samarbetade för att designa och konstruera en bränslecellsdriven sopbil inom ett FFI-finansierade projekt. Sopbilen har sedan dess varit i drift i Göteborg från 2020 till 2023, med en vätgasinfrastruktur bestående av en tankstation vid tidpunkten för detta arbete. LÄS MER

  4. 3. Ageing of NCA/Graphite-Silicon Cells : Investigating the feasibility of accelerated ageing

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Gustav Giske; [2022]
    Nyckelord :;

    Sammanfattning : Reliable test data on cell ageing is important to have when deciding on which cell to use in a vehicle. Accelerated ageing could, if performed in a good way, increase the amount of information about the cell ageing in an early stage of a vehicle project, reducing the risk of costly battery replacements. LÄS MER

  5. 4. Thermal induced yellowing of peroxide bleached birch pulp

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Industriell miljö- och processteknik

    Författare :Alexander Nygren; [2020]
    Nyckelord :Accelerated ageing; Bleaching; Brightness reversion; Kraft pulp; pH; Yellowing;

    Sammanfattning : Brightness reversion, also known as yellowing, is a well-known phenomenon which means that the brightness of paper products decreases during ageing. The name of this phenomenon is based on that paper products usually change in color towards yellow during ageing. LÄS MER

  7. 5. Polygenic risk for schizophrenia and non-pathological cognitive aging

    Master-uppsats, Umeå universitet/Institutionen för psykologi

    Författare :Nasimeh Naseri; [2020]
    Nyckelord :Schizophrenia; polygenic risk; ageing; cognition; Schizofreni; poly-genetisk risk; åldrande; kognition;

    Sammanfattning : Schizophrenia is a severe psychiatric disorder associated with cognitive impairments. Polygenic risk for schizophrenia (SCZ-PGR) has been associated with poor performance in cognitive tasks, both in patients and in healthy individuals. It has also been suggested that schizophrenia is associated with accelerated aging. LÄS MER