Sökning: "convection cells"

Visar resultat 1 - 5 av 10 uppsatser innehållade orden convection cells.

  1. 1. Study of Triply Periodic Minimal Surfaces for Heat Transfer Applications

    Master-uppsats, Uppsala universitet/Institutionen för materialvetenskap

    Författare :María Xuan Celaya Granados; [2023]
    Nyckelord :;

    Sammanfattning : In the pursuit of enhancing heat exchanger efficiency, several heat transfer- enhancing strategies are employed. The traditional methods include surface vibrations, microchannels, and integration of vortex generators. Additionally, new solutions are being studied, taking advantage of other relevant improve- ments in the engineering field. LÄS MER

  3. 2. A NUMERICAL MODEL OF HEAT- AND MASS TRANSFER IN POLYMER ELECTROLYTE FUEL CELLS : A two-dimensional 1+1D approach to solve the steady-state temperature- and mass- distributions

    Uppsats för yrkesexamina på avancerad nivå, Mälardalens högskola/Framtidens energi

    Författare :Emil Skoglund; [2021]
    Nyckelord :PEFC; PEM; convection; mass transport; heat transport; co-flow; temperature profile; heat transfer model; transient; steady state; water concentration profile; water vapor profile; relative humidity; through-plane cross section;

    Sammanfattning : Methods of solving the steady state characteristics of a node matrix equation system over a polymer electrolyte fuel cell (PEFC) were evaluated. The most suitable method, referred to as the semi-implicit method, was set up in a MATLAB program. LÄS MER

  4. 3. Decreasing charging time of Lithium-Ion Battery by controlling temperature during the process

    Magister-uppsats, Högskolan i Halmstad/Akademin för ekonomi, teknik och naturvetenskap

    Författare :Seyedhafez Sadeghi Meykola; [2020]
    Nyckelord :Lithium-Ion; Battery; Cooling system;

    Sammanfattning : In this report, which is written for Halmstad University and on behalf of Semcon, a mechanical design process was implemented to evaluate the possibility of executing a low-cost cooling system for one of the battery company’s products. The report started from the background of former studies to clarify the problem and finding existing solutions in the first step and following up with developing concepts based on gathered information from the literature study. LÄS MER

  5. 4. Measuring the Characteristic Sizes of Convection Structures in AGB Stars with Fourier Decomposition Analyses : the Stellar Intensity Analyzer (SIA) Pipeline.

    Master-uppsats, Uppsala universitet/Teoretisk astrofysik

    Författare :Miquel Colom i Bernadich; [2020]
    Nyckelord :Asymptotic Giant Branch; AGB; red giants; stars; stellar convection; Fourier analysis; convection cells;

    Sammanfattning : Context. Theoretical studies predict that the length scale of convection in stellar atmospheres isproportional to the pressure scale height, which implies that giant and supergiant stars should have convection granules of sizes comparable to their radii. LÄS MER

  7. 5. Solcellers effektivitet vid integrerat eller applicerat montage

    Master-uppsats, Karlstads universitet/Avdelningen för energi-, miljö- och byggteknik

    Författare :August Larsson; [2019]
    Nyckelord :BIPV; air cavity; naturally convection; BIPV; luftspalt; skorstenseffekten; naturlig konvektion;

    Sammanfattning : Sweden has a climate target to get a total renewable electricity production by 2040, in order to succeed with the goal, the proportion of solar energy needs to increase. Increased environmental awareness and increased profitability of solar cells have led to an increase. LÄS MER