Sökning: "Electric propulsion system"

Visar resultat 1 - 5 av 74 uppsatser innehållade orden Electric propulsion system.

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. Paths forward for Sustainable Maritime Transport : A techno-economic optimization framework for next generation vessels

   Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

   Författare :Julian Ulrich Hausweiler; [2023]
   Nyckelord :;

   Sammanfattning : Recently, the decarbonization of maritime transport has received increased attention, in order to align with the targets of the Paris Agreement. In 2023, the International Maritime Organization unveiled their revised greenhouse gas strategy with an ambitious target: net-zero emissions by 2050. LÄS MER

4. 3. 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

5. 4. 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

7. 5. Tools and Challenges in Evaluating Control Surface Airworthiness for a Blended-Wing-Body UAV

   Master-uppsats, KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

   Författare :Anton Åkesson; [2023]
   Nyckelord :;

   Sammanfattning : For transport aeroplanes the Blended-Wing-Body (BWB) configuration shows promise in improving aerodynamic efficiency. The Green Raven project strives to demonstrate hydrogen fuel-cell-electric propulsion on a 4 m wingspan BWB. LÄS MER