Sökning: "Battery electric propulsion"

Visar resultat 1 - 5 av 33 uppsatser innehållade orden Battery electric propulsion.

1. 1. Benchmarking a 1 kW hybrid hydrogen fuel cell system

   Master-uppsats, Lunds universitet/Institutionen för energivetenskaper

   Författare :Jonathan Envall; [2023]
   Nyckelord :PEMFC; fuel cell; UAV; hybrid; Technology and Engineering;

   Sammanfattning : Unmanned Aerial Vehicles (UAV's) offer great versatility in the tasks that they may perform and they are today used in many sectors. The H24LEO project, administered by the Lund University School of Aviation, aims to develop and demonstrate a hybrid proton-exchange membrane fuel cell-powered UAV to aid in search and rescue operations performed by the Swedish Maritime Administration, and reduce the greenhouse gas emissions compared to similar work performed by helicopters. LÄS MER

3. 2. Conceptual design of the next generation gas turbines : Modelling of a hybrid electric mixed turbofan for a trainer aircraft

   Uppsats för yrkesexamina på avancerad nivå, Mälardalens universitet/Akademin för ekonomi, samhälle och teknik

   Författare :Sophia Fisher; Michael Åkerström; [2023]
   Nyckelord :Hybrid propulsion; mixed turbofan; parallel configuration; performance;

   Sammanfattning : To mitigate climate change, all sectors must contribute their part. Electric propulsion system is a promising approach to reduce emissions from the aviation industry. A major challenge is however the low energy density in today’s battery technology. LÄS MER

4. 3. Preliminary Design of a 30 kN Methane-Oxygen-powered Electric-Pump-fed Liquid Rocket Propulsion System

   Master-uppsats, Luleå tekniska universitet/Rymdteknik

   Författare :Vikramjeet Das; [2023]
   Nyckelord :rocket engine; liquid rocket; methalox; electropump; LRPS; LPRE; liquid methane; electric pump feed system;

   Sammanfattning : The design of a liquid rocket propulsion system, unlike that of a standalone system, is intertwined with the overall development of a number of associated systems and is influenced by a multitude of conditions and considerations: from the requirements needed to accomplish the mission to the rationalizations involved behind the development of each rocket system and/or component. In my thesis, the preliminary design of a “new generation” 30 kN rocket engine driven by an electric pump feed system and running on liquid methane and liquid oxygen is performed. LÄS MER

5. 4. Energy flows and potential energy development strategies in RoRo ports: A study based on the Port of Trelleborg

   Master-uppsats, Lunds universitet/Institutionen för energivetenskaper

   Författare :Gabriele Gonzales; [2023]
   Nyckelord :RoRo Ports; Energy Flows; Energy Development; Energy Strategies; Renewable Energy; Ports; Energy Hub; Energy Storage; Hydrogen; Technology and Engineering;

   Sammanfattning : The recent push for decarbonization in the maritime sector presents an opportunity for ports to strengthen their position as energy hubs. This work studies the existing energy flows in the Port of Trelleborg, one of Europe's biggest roll-on, roll-off ports, and proposes some energy-related development strategies. LÄS MER

7. 5. Hållbar färjetrafik : En jämförelseanalys mellan batteri- och vätgasdrift i Gotlandsbolagtes färjetrafik

   Kandidat-uppsats, KTH/Hållbar utveckling, miljövetenskap och teknik

   Författare :Anton Lenstrup; Robert Pending; [2022]
   Nyckelord :Battery electric propulsion; Hydrogen propulsion; Conversion Carbon Dioxide equivalents; Efficiency; Batteridrift; Vätgasdrift; Konvertering; Koldioxidekvivalenter; Verkningsgrad;

   Sammanfattning : I samband med klimatmålet att Sverige ska ha ett netto-noll utsläpp av växthusgaser till 2045 krävs det att alla sektorer minskar sina växthusgasutsläpp och av sektorerna utgör sjöfarten inrikes en mindre men fortfarande betydande del. Två omtalade förnyelsebara driftstyper är batteri- och vätgasdrift, som har potential att ersätta fossila bränslen. LÄS MER