Sökning: "absorptance"

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

  1. 1. Optical Studies of Cellulose-Based Materials for Spectral Design of Camouflage and Passive Cooling Applications

    Master-uppsats, Linköpings universitet/Institutionen för fysik, kemi och biologi

    Författare :Olivia Grönlund Falk; Felix Valentin; [2022]
    Nyckelord :Nanocellulose; optical properties; spectroscopy; ellipsometry; BRDF measurements; optical microscopy; reflectance; transmittance; absorptance; transflectance; spectral design; camouflage; passive radiative cooling;

    Sammanfattning : In the past few years, studies regarding new bio-based materials have led to an increased attention in the nanoscale product of cellulose, called nanocellulose. This biodegradable and renewable material has interesting physical, optical and thermal properties. LÄS MER

  3. 2. Investigating an electroplating method of Co-Cr alloys : A design of experiment approach to determine the impact of key factors on the electroplating process

    Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för tillämpad fysik och elektronik

    Författare :Andreas Nordenström; [2018]
    Nyckelord :design of experiment; electroplating; selective surfaces; Co-Cr; Fractional factorial design; concentrating solar collectors; experimentell design; elektroplätering; solfångare;

    Sammanfattning : Solar energy is increasingly being considered a promising solution to reduce the emissions of CO2 and green house gas. The performance of solar collectors largely depends on the ability to absorb incoming solar radiation with minimal thermal radiation losses. LÄS MER

  4. 3. Optimerade material för optiska komponenter i koncentrerande solfångare

    Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för tillämpad fysik och elektronik

    Författare :Malin Öberg; [2015]
    Nyckelord :Solfångare; Reflektor; Receiver; Solenergi; Reflektans; Emissivitet;

    Sammanfattning : The energy consumption continues to increase as the use of electronics and energy consuming equipment increases. The use of fossil fuels has to be phased out for this to be sustainable in the long run while the use of renewable energy continues to increase. LÄS MER

  5. 4. Optical and Mechanical Properties of Cool Roof Paint Containing Hollow Thermoplastic Microspheres

    Uppsats för yrkesexamina på avancerad nivå, Institutionen för kemi - Ångström

    Författare :Olof Sandin; [2013]
    Nyckelord :;

    Sammanfattning : This master thesis examines the effect of hollow thermoplastic microspheres in coolroof paints. These types of paints are characterized by their high reflectivity forwavelengths up to 2.5 micrometers and high absorptivity in the IR region. Thethermoplastic microspheres were produced by Expancel®, a unit withinAkzoNobel®. LÄS MER

  7. 5. Hydrogen diffusion in nano-sized materials : investigated by direct imaging

    Uppsats för yrkesexamina på avancerad nivå, Materialfysik

    Författare :Andreas Bliersbach; [2011]
    Nyckelord :hydrogen; diffusion; hydrogen diffusion; metal hydride; vanadiumhydride; vanadium hydride; VHx; thin-film; thin film;

    Sammanfattning : The kinetics of interstitial hydrogen are of great interest and importance for metal-hydride storage, purification, fusion and fission reactor technology, material failure processes, optical sensors for hydrogen gas and many other technologies. In particular nano-sized materials motivate fascinating applications and scientific questions. LÄS MER