Sökning: "diffusivity"

Visar resultat 11 - 15 av 144 avhandlingar innehållade ordet diffusivity.

  1. 11. Thermally Conductive High-Density Polyethylene Composites for Ground Heat Exchangers

    Författare :Adib Kalantar Mehrjerdi; Högskolan i Borås; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; High-density polyethylene; talc; thermal conductivity; thermal diffusivity; thermal stability; melt rheology; oxidation induction time; α relaxation; strain hardening;

    Sammanfattning : Today, the energy used for the heating and cooling of offices, shopping centres, schools, residential areas, andother buildings is as large as 50% of the total energy consumption in the world. The climate change, globalwarming, and environmental issues have forced high requirements for energy efficiency and clean energyproduction in buildings. LÄS MER

  3. 12. Innovative process solutions towards recycling of salt cake from secondary aluminum smelting

    Författare :Peng Li; Lidong Teng; Sankaran Subramanian; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Thermal diffusivity; Model; Solubility; CO2; AlN; Crystals; Hydrolysis; Enhance; Hinder; Leaching; Absorption; Synthesis; SiMgAlON; Oxidation; Arctan; Activation energy; Mullite; Liquid; Crystallization.; SRA - Production; SRA - Produktion;

    Sammanfattning : To offer better solutions for the recycling of salt cake from secondary aluminum melting, several innovative investigations were carried out based on hydrometallurgical and pyrometallurgical views.Thermal diffusivity measurements as a function of temperature on salts-Al composites having various compositions (0, 2, 4, 6, 8, 10, 12wt pct metallic Al) were carried out. LÄS MER

  4. 13. Monolith catalysts for car exhaust : experimental and theoretical studies of oxygen storage, flow and mass transfer

    Författare :Anna Holmgren; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; monolith; car-exhaust; CFD simulations; turbulence; Pt CeO2 Al2O3; catalysis; effective diffusivity; oxygen storage; flow distribution; mass transfer;

    Sammanfattning : .... LÄS MER

  5. 14. Analysis of β--emitting radionuclides: 90Sr and 99Tc : applied in spent nuclear fuel research Henrik Ramebäck

    Författare :Henrik Ramebäck; Chalmers tekniska högskola; []
    Nyckelord :diffusion; 99< sub> Tc; apparent diffusivity; ICP-MS; spent nuclear fuel; analysis; 90< sub>Sr; released fraction;

    Sammanfattning : .... LÄS MER

  7. 15. Modelling of Catalytic Monolith Reactors for Exhaust Aftertreatment

    Författare :Magnus Walander; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; diesel oxidation catalyst; effective diffusivity; washcoat; EATS; gravimetric analysis; parameter estimation; synthetic catalyst activity test; Exhaust aftertreatment modelling; scanning electron microscope;

    Sammanfattning : The incomplete combustion of liquid or gaseous fuels in the internal combustion engine inherently produces several toxic emissions that need to be  removed. This is done through a series of catalytic converters, referred to as the exhaust aftertreatment system (EATS), each catalyst with its own purpose. LÄS MER