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Vladimir Pelic, Ozren Bukovac, Radoslav Radonja and Nastia Degiuli
Modern marine propulsion systems must be reliable, energy efficient, environmentally friendly, and economical. Efforts to reduce fuel costs and carbon dioxide (CO2) emissions per nautical mile have a significant impact on the choice of propulsion system....
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Changjae Moon, Sanghun Jeong, Giltae Roh and Kido Park
The strengthening of regulations such as EEXI, EEDI, and CII on ship emissions is underway. Despite their application, objective comparisons of ships are hindered by diverse navigation patterns and varying velocity regulations in different seas and ports...
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Martynas Drazdauskas and Sergejus Lebedevas
The capability of operational marine diesel engines to adapt to renewable and low-carbon fuels is considered one of the most influential methods for decarbonizing maritime transport. In the medium and long term, ammonia is positively valued among renewab...
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Carlos Alberto Romero, Pablo Correa, Edwan Anderson Ariza Echeverri and Diego Vergara
In recent times, the significance of advancing road transportation technologies has notably increased. This is mainly driven by the escalating need for road transportation systems that are not only safe but also environmentally sustainable. Moreover, enh...
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Junjie Pan, Xin Lin, Zezhong Wang, Ruoyan Wang, Kun Wu, Jinhu Liang and Xilong Yu
This study investigated combustion characteristics of composite fuel grains designed based on a modular fuel unit strategy. The modular fuel unit comprised a periodical helical structure with nine acrylonitrile?butadiene?styrene helical blades. A paraffi...
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Ahmad Alzahrani
This paper presents an experimental prototype of hydrogen fuel cells suitable for training engineering students. The presented system is designed to teach students the V-I characteristics of the fuel cells and how to record the V-I characteristics curve ...
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Dilyan Dimitranov and Blagovest Belev
The effective use of energy proposes using less energy to achieve the same goal. The International Maritime Organization started using criteria for ship?s energy efficiency in 2013, when the new International Convention for the Prevention of Pollution fr...
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Veronica Vigna and Massimo Figari
The harvesting of wind energy and its transformation into a thrust force for ship propulsion are gaining in popularity due to the expected benefit in fuel consumption and emission reductions. To exploit these benefits, a proper matching between the conve...
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Md. Abu Ayub Siddique, Seung-Yun Baek, Seung-Min Baek, Hyeon-Ho Jeon, Jun-Ho Lee, Mo-A Son, Su-Young Yoon, Yong-Joo Kim and Ryu-Gap Lim
The objective of this study was to estimate power delivery efficiency and fuel consumption based on engine modes. In this study, a 95 kW power-shift tractor was used to analyze power delivery and estimate fuel consumption during rotary tillage. Rotary ti...
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Sultan Çogay and Gökhan Seçinti
Wildfires have become a global problem in recent years. Authorities are looking for various technological and auxiliary solutions to deal with this environmental crisis. One of the advances being utilized in the forest fire field and its aftermath is unm...
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Maja Percic, Nikola Vladimir, Ailong Fan and Ivana Jovanovic
Energy requirements push the shipping industry towards more energy-efficient ships, while environmental regulations influence the development of environmentally friendly ships by replacing fossil fuels with alternatives. Current mathematical models for s...
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Mina Tadros, Roberto Vettor, Manuel Ventura and C. Guedes Soares
This paper presents the effect of hull roughness over 10 years of operation on ship performance. The numerical model is developed by coupling NavCad and Matlab to perform the computation and the data processing. On the basis of a given hull, an engine, a...
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Danilo D?Andrea, Giacomo Risitano and Fabio Alberti
The aim of this work is to design a power split transmission for an urban street sweeper in order to reduce fuel consumption. The design process starts with the comparison between a hydrostatic and a hydromechanical power split transmission. Both transmi...
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Judith Rosenow, Gong Chen, Hartmut Fricke and Yanjun Wang
Increasing complexity due to a constantly growing number of target functions turns air traffic trajectory optimization into a multidimensional and nonlinear task that in turn necessitates a focus on the case-sensitive most important criteria. The criteri...
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Marco Altosole, Flavio Balsamo, Ugo Campora and Luigia Mocerino
The performance of a marine dual-fuel engine, equipped with an innovative hybrid turbocharger producing electric power to satisfy part of the ship?s electric load, is presented by a simulation comparison with the traditional turbocharging technology. The...
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Mina Tadros, Manuel Ventura and Carlos Guedes Soares
This paper presents a comparison between different types of propellers operated in calm water to evaluate their performance behind hulls and in open-water conditions. A bulk carrier is chosen as a case study to perform the simulation and to evaluate the ...
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Zhi Yung Tay, Januwar Hadi, Favian Chow, De Jin Loh and Dimitrios Konovessis
The global greenhouse gas emitted from shipping activities is one of the factors contributing to global warming; thus, there is an urgent need to mitigate the adverse effect of climate change. One of the key strategies is to build a vibrant maritime indu...
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Andreas Rauh
The electric power characteristic of solid oxide fuel cells (SOFCs) depends on numerous influencing factors. These are the mass flow of supplied hydrogen, the temperature distribution in the interior of the fuel cell stack, the temperatures of the suppli...
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Bonguk Koo and Yong-Duck Kang
The results of flow visualization and hot-film measurement in a water channel are presented in this paper, in which the effectiveness of controlling synthetic hairpin vortices in the laminar boundary layer is examined to reduce skin friction. In this stu...
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Viktor Popov,Vasiliy Loginov,Yevgen Ukrainets,Volodymyr Shmyrov,Petro Steshenko,Pavlo Hlushchenko
Pág. 51 - 59
Improving the aircraft?s fuel efficiency is one of the main requirements for prospective and modernized aircraft. This paper reports the assessment of change in aerodynamic quality resulting in the improved fuel efficiency of a long-range aircraft when u...
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