Results 11 to 20 of about 67,696 (213)

Analysis Leading to the Design of a Hybrid Gas-Electric Multi-Engine Testbed

open access: yesAerospace, 2023
Given the increase in air traffic, the main challenges in aircraft design are in-flight emissions and noise heard by the community. These problems have thus far been solved by incremental improvements in aerodynamics, engine technology and operation.
Agata Kuśmierek   +3 more
doaj   +1 more source

Energy Flow and Electric Drive Mode Efficiency Evaluation of Different Generations of Hybrid Vehicles under Diversified Urban Traffic Conditions

open access: yesEnergies, 2023
Hybrid propulsion dedicated to light duty vehicles is seen as an evolutionary change from internal combustion engine (ICE) to electric propulsion. Widespread direct replacement of convection ICEs in the current energy system is impossible because ICEs ...
Ireneusz Pielecha   +2 more
doaj   +1 more source

Multi-Objective, Multi-Disciplinary Design Optimization and Multi-Attribute Evaluation of Hybrid Rocket Motors Used for Manned Lunar Lander

open access: yesAerospace, 2023
This paper proposed a multi-objective, multi-disciplinary design optimization and multi-attribute evaluation method for the manned lunar lander descent stage.
Yang Liu   +5 more
doaj   +1 more source

Hybrid marine propulsion power system with the redox flow batteries of comprehensive aging model

open access: yesInternational Journal of Naval Architecture and Ocean Engineering, 2021
This study proposes a hybrid marine power system combining dual-fuel generators, a fuel cell, and Vanadium Redox Flow Batteries (VRFB). Rigorous verification and validation of the dynamic modelling and integration of the system are conducted.
Seunghyeon Yoo   +4 more
doaj   +1 more source

A Back–Forward Approach-Based Efficiency Performance Analysis Model for Hybrid Electric Propulsion Ships Using the Holtrop–Mennen Method

open access: yesJournal of Marine Science and Engineering, 2023
Due to tightening regulations on exhaust emissions from ships, there is a growing need to develop electric or hybrid electric propulsion systems to replace conventional diesel-based ship power systems.
Soon Ho Hong, Dong Min Kim, Sun Je Kim
doaj   +1 more source

Optimization and Analysis of Hybrid Electric System for Distributed Propulsion Tilt-Wing UAV

open access: yesIEEE Access, 2020
Hybrid electric distributed propulsion tilt-wing UAVs show unlimited application prospects due to their high propulsion efficiency and vertical take-off and landing capabilities.
Cheng He, Yuhong Jia, Dongli Ma
doaj   +1 more source

SUPERCHARGED ENGINE USING TURBINE STANDALONE EXHAUST GAS RECUPERATION SYSTEM

open access: yesBrodogradnja, 2017
This paper presents a new hybrid concept that increases the overall efficiency of the propulsion system on ships. The hybrid concept of the marine propulsion system was examined in 1D CFD internal combustion engine model where the turbine and compressor ...
Nikola Matulić   +2 more
doaj   +1 more source

Techno-economic investigation of alternative propulsion systems for tugboats

open access: yesEnergy Conversion and Management: X, 2021
In this paper, the main alternative propulsion systems based on internal combustion engines and batteries of a tugboat operating in harbour duties of the tugboat that include Emission Control areas are comparatively assessed.
Ömer Emre Karaçay   +1 more
doaj   +1 more source

Artificial three-body equilibria for hybrid low-thrust propulsion [PDF]

open access: yes, 2008
This paper proposes a new concept of creating artificial equilibrium points in the circular restricted three body problem, where the third body uses a hybrid of solar sail and solar electric propulsion.
Baig, Shahid, McInnes, Colin R.
core   +1 more source

Study on power distribution strategy of multi-stack fuel cell system based on particle swarm optimization threshold

open access: yesZhongguo Jianchuan Yanjiu, 2023
ObjectivesTo improve the stability and efficiency of hybrid propulsion systems for ships, a power distribution strategy based on the particle swarm optimization (PSO) threshold for multi-stack fuel cell systems is proposed.
Ji LUO   +4 more
doaj   +1 more source

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