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Visar resultat 1 - 5 av 14 uppsatser som matchar ovanstående sökkriterier.

  1. 1. Petrophysical Properties of Rocks in Central Kiruna Mining District, Sweden

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Simon Peter Dagbui; [2023]
    Nyckelord :Kiruna mining district; Common earth model; petrophysics; density; AMS; complex electrical resistivity; NRM; magnetization; IOA; Kirunavaara Mineralization;

    Sammanfattning : High economic and metallogenic significance of northern Norrbotten ore district in Sweden which hosts Kiruna mining district makes it a very important ore district in the world. Northern Norrbotten ore district contributes a combined 90 percent of iron production in Europe. LÄS MER

  3. 2. Design, implementation and evaluation of a daylight estimation tool using 3D city model data

    Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Författare :Peter Nezval; [2021]
    Nyckelord :3D city model; CityJSON; solar energy; free and open-source software; 3D feature extraction; solar urban planning; sustainable urban development; geomatics; Earth and Environmental Sciences; Technology and Engineering;

    Sammanfattning : Solar energy is an important component of sustainable urban development. However, it is still not reaching its full potential due to several reasons. One of them is a lack of free tools based on open geodata capable of estimating solar energy (daylight) metrics on building features, e.g. LÄS MER

  4. 3. Systematic optimisation of an existing fuel oil preheating system : Facilitating replacement of 5000 cSt oil with 74 500 cSt

    Uppsats för yrkesexamina på grundnivå, Linnéuniversitetet/Institutionen för maskinteknik (MT)

    Författare :Albin Fransson; Peter van der Brug; [2020]
    Nyckelord :Heat Exchanger; Shell; Tube; Plate; DFSS; Fuel Oil; Optimisation; Viscosity; Efficiency;

    Sammanfattning : In order to increase the efficiency of a preheating system as temperatures increase, without using seawater as a coolant, an additional heat exchanger is required to be installed into the system. The purpose of the study is therefore to investigate how the temperatures of fuel oils can be increased while minimising the loss of energy and costs. LÄS MER

  5. 4. VIBRATION ANALYSIS OF THE FLUE GAS FAN IN MÄLARENERGI’S UNIT 6 : Troubleshooting using CFD simulations in ANSYS to locate the origin of the vibration spikes and suggest solutions for a more optimized performance

    Master-uppsats, Mälardalens högskola/Akademin för ekonomi, samhälle och teknik

    Författare :Felix Brogren; Peter Gustafsson; [2018]
    Nyckelord :Troubleshoot; CFD simulation; spectrum analysis; flow-induced vibration; vibrations in machinery; Felsökning; CFD-simulering; spektrum analys; flödesinducerad vibration; vibrationer i maskiner;

    Sammanfattning : The purpose of this study is to investigate the flue gas fan in Mälarenergi’s Unit 6 and try to find what is causing the vibrations increase. The Fast Fourier transform (FFT) method was used for this degree project. A comparison was made with previous studies using FFT in order to pinpoint the source of the problem with vibrations. LÄS MER

  7. 5. Robust and Adaptive Motion Control for Windscreen Wiping on Commercial Vehicles

    Master-uppsats, KTH/Maskinkonstruktion (Inst.)

    Författare :Peter Fjellander; [2018]
    Nyckelord :motion control; current measurement; windscreen wiping; dc motor; pwm; modelbased design; rörelsestyrning; strömmätning; vindrutetorkning; dc-motor; pwm; modellbaserad utveckling;

    Sammanfattning : För att kunna framföra ett fordon på ett säkert sätt är vindrutetorkning är en viktig del. Men, bara för att det är en viktig del i användandet innebär det inte att det är en viktig del i utvecklingen. Detta har visat sig genom att funktionen och designen av vindrutetorkare på lastbilar har varit densamma i årtionden. LÄS MER