Sökning: "RNG"

Visar resultat 1 - 5 av 17 uppsatser innehållade ordet RNG.

  1. 1. Modeling of the trajectory of ice thrown from a wind turbine

    Master-uppsats, Lunds universitet/Institutionen för energivetenskaper

    Författare :Elena Rocchi; [2023]
    Nyckelord :Ice thrown - Ice fall - RANS - LES - CFD - simulations - ballistic model; Technology and Engineering;

    Sammanfattning : There is a growing number of wind turbines installed in cold temperature zones as a result of the restricted space for new construction. Due to ice deposition on the turbine blades, the increasing installation of wind turbines in freezing temperature areas presents many challenges: ice accumulation increases weight, unbalances the rotor, diminishes aerodynamic efficiency, and creates safety issues. LÄS MER

  3. 2. Exploring true random number generators Build on commercial-off-the-shelve Components

    M1-uppsats, Malmö universitet/Institutionen för datavetenskap och medieteknik (DVMT)

    Författare :Linnéa Mörk; [2023]
    Nyckelord :TRNG; RNG; Random number generator; commercial-off-the-shelve;

    Sammanfattning : Generating random numbers can be accomplished through various methods, with the primary distinction lying between pseudo-random number generators (PRNGs), which are commonly used for applications that require a large amount of random data, and true random number generators (TRNGs), which are commonly used for applications that need security and unpredictability. This thesis explores the feasibility of harnessing frequency variations in the electrical grid as a source of entropy for a TRNG. LÄS MER

  4. 3. CFD Study of An Office Room Equipped with Corner Impinging Jet Ventilation

    Master-uppsats, Högskolan i Gävle/Energisystem och byggnadsteknik

    Författare :Getiye Wodaje; [2022]
    Nyckelord :CFD in ventilaion; Thermal comfort; Impinging jet ventilation; thermally stratified flow; Corner impinging jet; Office air quality; Indoor environment; turbulent jet;

    Sammanfattning : A CFD validation study was made using corner supplied impinging jet ventilation operating in cooling mode. The air distribution system has two equilateral triangle shaped inlets placed 80cm above the floor at the two that share a common wall. The supply air was introduced at 2.26m/s. LÄS MER

  5. 4. Numerical Investigation of the Near FieldZone Flow Behavior of Isothermal CornerImpinging Jet Ventilation Using CFD

    Master-uppsats, Högskolan i Gävle/Avdelningen för byggnadsteknik, energisystem och miljövetenskap

    Författare :Too-chukwu C. Ogbuagu; [2021]
    Nyckelord :Ventilation; Computational fluid dynamics;

    Sammanfattning : Abstract The impinging jet ventilation's importance in providing better air distribution and energy-efficient operation, as well as both its heating and cooling flexibility potential cannot be overemphasized. This is because acceptable indoor air quality and its environmental conditions are essential to occupant’s wellbeing, comfort, productivity, and improved cognitive function. LÄS MER

  7. 5. Numerical Study on Air Demand of Free Surface Flows in a Discharge Tunnel

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Institutionen för fysik och astronomi

    Författare :Jonathan Barassa; Rickard Nordlöf; [2020]
    Nyckelord :Computational Fluid mechanics; Hydropower; Air demand; Free surface flows; ANSYS Fluent;

    Sammanfattning : Aeration issued through a ventilation shaft is an important measure to prevent cavitation and large gauge pressure in flood discharge tunnels. In order to dimension the ventilation shaft appropriately, itis necessary to have a good understanding of the air-water flow in the tunnel. LÄS MER