Sökning: "particle number size distribution."

Visar resultat 16 - 20 av 37 uppsatser innehållade orden particle number size distribution..

  1. 16. CFD-simulations of urea-waterspray in an after-treatment systemusing Star-CCM+

    Master-uppsats, KTH/Mekanik

    Författare :Emelie Trigell; [2018]
    Nyckelord :after-treatment systems; selective catalytic reaction SCR ; AdBlue; multiphase flow; multi-component liquid; Unsteady Reynolds Average Navier Stokes RANS ; wall film formation; solid deposits; efterbehandlingssystem; selektiva katalytiska reaktioner; AdBlue; flerfasstr ¨ommning; flerkomponentvätska; Unsteady Reynolds Average Navier Stokes; väggfilm; avlagringar;

    Sammanfattning : The legislation has forced the vehicle industry to reduce tail-end emissions. The air pollutant nitrogen oxide (NOX) has been shown to have a negative impact on human health and the environment. One of the key technologies to reduce the levels of NOX emitted from a vehicle is by implementing an after-treatment system. LÄS MER

  3. 17. Grovfoder till lågdräktiga dikor med speciellt fokus på fiber och protein

    Master-uppsats, SLU/Dept. of Animal Environment and Health

    Författare :Linn Frendberg; [2017]
    Nyckelord :Rörflen; ; NDF; ; iNDF; ; torrsiktning; ; partikelstorlek i träck;

    Sammanfattning : Till följd av ökande efterfrågan på betande nötkreatur och nötkött från nötkreatur uppfödda i Sverige har dikalvsproduktionen i Sverige ökat. För att möta behovet behöver produktionen öka ytterligare, vilket kräver en bättre ekonomisk lönsamhet för lantbrukare som håller dikor. LÄS MER

  4. 18. Atmospheric Particles in Kermanshah, Iran

    Master-uppsats, Lunds universitet/Atomfysik; Lunds universitet/Kärnfysik; Lunds universitet/Fysiska institutionen

    Författare :Rebecka Häggström; [2017]
    Nyckelord :aerosols; aerosol technology; SMPS; soot concentrations; dust; Iran; Kermanshah; PSAP; airborne particles; Technology and Engineering; Physics and Astronomy; Earth and Environmental Sciences;

    Sammanfattning : No measurements of airborne particles have been done in Iran previously. Starting characterization of aerosol particles in a completely new geographical area, a suitable and important measurement parameter is the aerosol particle number size distribution. This can be used to indirectly infer climate- and health effects of the particles. LÄS MER

  5. 19. Three-dimensional Investigations of Different Sulfides in Steels by Using Electrolytic Extraction

    Master-uppsats, KTH/Materialvetenskap

    Författare :Pang Kit Jerry Lam; [2016]
    Nyckelord :Electrolytic extraction EE ; Manganese sulfides MnS ; Heat treatment HT ; Size; Number density per unit volume Nv ; Morphology; Aspect ratio AR ; Particle size distribution PSD ;

    Sammanfattning : The emphasis of this study is focusing on three-dimensional (3D) investigations of the manganese sulfide (MnS) inclusions characteristics in steels by using electrolytic extraction (EE). Two steel grades, 42CrMo4 and 157C, heat treated (HT) at 900 oC were investigated. LÄS MER

  7. 20. Size-dependent airborne particle emissions from ship traffic

    Kandidat-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Kärnfysik

    Författare :Fredrik Mattsson; [2016]
    Nyckelord :Aerosol particle; shipping; emission; health effect; particle number concentration; particle number size distribution; Physics and Astronomy;

    Sammanfattning : Most aerosol particles emitted from shipping affect the climate by counteracting the greenhouse effect. Although, this masks the warming effect of greenhouse gases, aerosol particles also have a negative health effects, and therefore emissions need to be reduced. LÄS MER