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Visar resultat 1 - 5 av 34 uppsatser som matchar ovanstående sökkriterier.

  1. 1. Är pendeltågens stopp för långa : - En studie av Stockholms pendeltågs uppehållstider .

    Kandidat-uppsats, KTH/Transportplanering

    Författare :JONAS KENNERÖ; [2023]
    Nyckelord :: dwell time; commuter trains; Stockholm Odenplan; Årstaberg; platform doors; train conductor; delays; short trains; rush hour; behavior of travelers; observational study; linear regression.;

    Sammanfattning : An important aspect during the planning of commuter trains is how long they will be waiting at the platform. All travelers must be able to board and get off the train in time while the process cannot take too long. LÄS MER

  3. 2. Stationen i stadsrummet : landskapet runt Stockholms tunnelbanestationer

    Master-uppsats, SLU/Dept. of Landscape Architecture, Planning and Management (from 130101)

    Författare :Simon Bunse; [2022]
    Nyckelord :landskap; stad; station;

    Sammanfattning : Stockholms Stad beskriver i sin översiktsplan att stadens attraktivitet är viktig, inte bara för Stockholm utan också för dess funktion som motor för hela Sverige. Man ser utmaningar kring framtida transportinfrastruktur - gång, cykel och kollektivtrafik, och också att stadsbyggandet ska utvecklas ur ett socialt, hållbart perspektiv, med god kvalitet och god arkitektur. LÄS MER

  4. 3. Hydrogen Production and Storage Optimization based on Technical and Financial Conditions : A study of hydrogen strategies focusing on demand and integration of wind power.

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Institutionen för elektroteknik

    Författare :Hanna Langels; Oskar Syrjä; [2021]
    Nyckelord :Hydrogen; hydrogen energy system; hydrogen production; hydrogen storage; large-scale storage; underground storage; vessels; LRC; hydrogen application; hydrogen strategies; hydrogen transition; offshore wind energy; electricity grid; electricity price; volatile electricity prices; renewable energy; hydrogen refueling station; hydrogen port; green hydrogen; hydrogen trucks; hydrogen forklifts; fuel cells; electrolysis; alkaline electrolyzer; PEM electrolyzer; levelized cost of hydrogen; LCOH; Vätgas; vätgassystem; vätgasproduktion; vätgaslagring; storskalig vätgaslagring; bergrum; vätgasapplikationer; vätgasstrategi; vätgasomställning; grön omställning; havsbaserad vindkraft; volatila elpriser; elnätet; förnybar energi; vätgastankstation; vätgasmack; vätgashamn; grön vätgas; vätgaslastbilar; vätgastruckar; bränsleceller; elektrolys; alkalisk elektrolysör; PEM elektrolysör;

    Sammanfattning : There has recently been an increased interest in hydrogen, both as a solution for seasonal energy storage but also for implementations in various industries and as fuel for vehicles. The transition to a society less dependent on fossil fuels highlights the need for new solutions where hydrogen is predicted to play a key role. LÄS MER

  5. 4. Simulation of air quality in underground train stations

    Master-uppsats, KTH/Maskinkonstruktion (Inst.)

    Författare :Benjamin Söderberg; [2020]
    Nyckelord :PM10; aerosols; air pollution; particulate matter; emission factors; underground train station; PM10; luftkvalité; tåg; emissionsfaktorer; underjordiska tågstationer;

    Sammanfattning : Particulate matter (PM) is a widespread air pollutant of microscopic particles that are suspended in the atmosphere. There is high concentration of PM in underground train stations and tunnels. The concentration of particulate matter (PM10) measured in Stockholm’s metro varies significantly between day and nighttime traffic of trains. LÄS MER

  7. 5. Considerations and Development of a Ventilation on Demand System in Konsuln Mine

    Master-uppsats, Luleå tekniska universitet/Geoteknologi

    Författare :Seth Gyamfi; [2020]
    Nyckelord :Ventilation on demand VOD ; Swedish Occupational Health Safety OH S regulations; Threshold Limit Value TLV ; Ventilation model; Diesel; battery-powered; heat; and blast simulations; Contaminants;

    Sammanfattning : Ventilation on demand (VOD) concept has earned significant worldwide attention by several mining companies in recent years. It is a concept where airflow is provided only to areas that require ventilation. The implementation of the concept has resulted in significant savings in annual energy consumption and cost for several companies globally. LÄS MER