Results 51 to 60 of about 67,696 (213)

Design and trade-offs of a pole-sitter mission [PDF]

, 2013
This paper provides a mission analysis and systems design of a pole-sitter mission, i.e. a spacecraft that is continuously above an Earth Pole, and can provide real-time, continuous and hemispherical coverage of the polar regions.
Ceriotti, Matteo, Heiligers, Jeannette, McInnes, Colin Robert   +2 more
core   +2 more sources

An improved engine analysis and optimization tool fo hypersonic combined cycle engines [PDF]

, 2015
It is widely accepted that more efficient propulsion technology needs to be developed before the re-usable 'space plane' concept for cheap and reliable access to space can become a practical reality.
Brown, R. E., Mogavero, A.
core   +2 more sources

Hybrid rocket performance [PDF]

A hybrid rocket is a system consisting of a solid fuel grain and a gaseous or liquid oxidizer. Figure 1 shows three popular hybrid propulsion cycles that are under current consideration.
Frederick, Robert A., Jr.
core   +1 more source

Optimized Diesel–Battery Hybrid Electric Propulsion System for Fast Patrol Boats with Global Warming Potential Reduction

Journal of Marine Science and Engineering
Fast patrol boats account for a large number among the numerous vessels used in naval fleets. Owing to their operational characteristics, which involve relatively high speeds, they contribute to emissions significantly.
Maydison, Haiyang Zhang, Nara Han, Daekyun Oh, Jaewon Jang   +4 more
doaj   +1 more source

Mars Ascent Vehicle Hybrid Propulsion Configuration [PDF]

As part of a Mars Sample Return (MSR) campaign, two Mars Ascent Vehicle (MAV) configurations have been designed in parallel. Each ascent vehicle configuration has a different propulsion system which ultimately leads to two unique vehicle designs. As part
Schnell, Andrew, Yaghoubi, Darius
core   +1 more source

Comparative Analysis of CO₂ Emissions, Fuel Consumption, and Fuel Costs of Diesel and Hybrid Dredger Ship Engines

Journal of Marine Science and Engineering
There is a consensus on the need to reduce the emissions of carbon compounds. The increase in global greenhouse gas (GHG) emissions in the maritime industry poses a serious challenge to environmental sustainability, climate change, and the operating ...
Ivica Skoko, Tatjana Stanivuk, Branko Franic, Diana Bozic   +3 more
doaj   +1 more source

Electric and hybrid vehicle system R/D [PDF]

The work being done to characterize the level of current propulsion technology through component testing is described. Important interactions between the battery and the propulsion system will be discussed.
Schwartz, H. J.
core   +1 more source

Designing displaced lunar orbits using low-thrust propulsion [PDF]

, 2010
The design of spacecraft trajectories is a crucial task in space mission design. Solar sail technology appears as a promising form of advanced spacecraft propulsion which can enable exciting new space science mission concepts such as solar system ...
Colin R. McInnes, Farquhar R., Gómez G., Gómez G., Jules Simo, Leipold M., Roy A. E., Simo J., Thurman R., Vonbun F.   +9 more
core   +1 more source

Dynamic Modeling of a Hybrid Propulsion System for Tourist Boat

Energies, 2018
Interest in designing more efficient and versatile ships comes from increasingly stringent regulations on emissions. In this context, a possible solution to overcome these limits may be the replacement of marine propulsion systems based on diesel engines
Linda Barelli, Gianni Bidini, Federico Gallorini, Francesco Iantorno, Nicola Pane, Panfilo Andrea Ottaviano, Lorenzo Trombetti   +6 more
doaj   +1 more source

Smart hybrid energy management system in a passenger car

Chemical Engineering Transactions, 2023
The technological advancements of internal combustion engines, batteries, and electric propulsion technology have reached such a level that they bring a new dimension to the potential of hybrid propulsion systems.
Péter Németh, Barna Hanula, András Lajos Nagy   +2 more
doaj