Sökning: "supercritical"

Visar resultat 31 - 35 av 95 avhandlingar innehållade ordet supercritical.

  1. 31. Mechanistic Modeling of Wall-Fluid Thermal Interactions for Innovative Nuclear Systems

    Författare :Roman Thiele; Henryk Anglart; Xu Cheng; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; GEN-IV reactors; Wall heat transfer; Computational Fluid Dynamics; Wall functions; Reactor design; Supercritical water; Liquid metal; Energy Technology; Energiteknik; Fysik; Physics;

    Sammanfattning : Next generation nuclear power plants (GEN-IV) will be capable of not only producing energy in a reliable, safe and sustainable way, but they will also be capable of reducing the amount of nuclear waste, which has been accumulated over the lifetime of current-generation nuclear power plants, through transmutation. Due to the use of new and different coolants, existing computational tools need to be tested, further developed and improved in order to thermal-hydraulically design these power plants. LÄS MER

  3. 32. Foam, Fire and Free Volume - Chemical and Physical Aspects of Porous Polymers

    Författare :Anna Andersson; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Poisson ratio; vibration damping; acoustic impedance; cell morphology; hyperbranched polymer; Polymer foams; free volume; positron annihilation; supercritical fluid.;

    Sammanfattning : Automotive seating has been under continous development since it was described for the first time in 1885. At that time one could read about a “padded leather bench seat sitting on springs mounted directly to the frame of a horse-less carriage”. LÄS MER

  4. 33. Multifunctional Foams Based on Nanomaterials from Plants and Textile Waste

    Författare :Carina Schiele; Lennart Bergström; Emily Cranston; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; multifunctional foams; nanofibers; aramid; cotton; nanocellulose; heat transport; thermal conductivity; electromagnetic shielding; supercritical drying; freeze drying; materialkemi; Materials Chemistry;

    Sammanfattning : Nanoparticles extracted from plants or textile waste are promising candidates for the design of sustainable materials. In this thesis, I explored how nanoparticles extracted from trees and from Kevlar and cotton textile wastes can be processed to form lightweight composite foams. LÄS MER

  5. 34. Multifunctional silk: from fabrication to application

    Författare :Manish Singh; Tillämpad biokemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Silk; Sonochemistry; Supercritical impregnation; Nanofiller; Soft biosensor; Enzyme mimic;

    Sammanfattning : Silk fibers offer untapped internal structures to template the formation of nano-objects and active coatings. So far, access to all or part of the internal and organized structures has been a significant challenge. LÄS MER

  7. 35. Extraction and Chromatography of targeted emission markers in atmospheric aerosols

    Författare :Hafiz Abdul Azeem; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; atmospheric aerosols; emission markers; mass spectrometry; supercritical CO2; trace analysis;

    Sammanfattning : Atmospheric aerosols are a highly complex and dynamic mixture of solid particles, liquid deplots and gases. They travel across the continents and affect global climate and human health in various ways, often negatively. One important aspect of research in atmospheric aerosols is the investigation of emissions to the atmosphere from various sources. LÄS MER