Article
Engineering, Marine
Raphael Zaccone, Ugo Campora, Michele Martelli
Summary: This paper presents an optimal design approach for diesel-electric propulsion systems, using a genetic algorithm to determine the best engine configuration and load sharing strategy. The method aims to minimize fuel consumption and meet power and speed requirements, showcasing the flexibility and efficiency of diesel-electric propulsion.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Engineering, Marine
Nader R. Ammar, Ibrahim S. Seddiek
Summary: This study aims to determine the most effective and cost-efficient propulsion system for achieving green containerized shipping. A comparison of two mechanical propulsion systems and a hybrid system reveals that the hybrid system is the best option, with the lowest CO2 emission rate of 5.926 ton/TEU. It reduces NOx, SOx, and CO2 emissions by 52%, 63.7%, and 30.4% respectively, compared to the conventional system. From an economic perspective, the dual fuel-powered system is currently the most cost-effective choice, but the hybrid system is more advantageous for future regulations, with a levelized cost of energy and cost-effectiveness of 0.07 $/kWh and 21.9 $/ton, respectively.
Article
Energy & Fuels
Juan P. Torreglosa, Enrique Gonzalez-Rivera, Pablo Garcia-Trivino, David Vera
Summary: This paper presents a high-fidelity benchmark for hybrid-electric vessels, combining diesel generators and batteries. The proposed hybrid-electric ship topology and control system were validated using real-time hardware-in-the-loop simulations, providing detailed analysis of the system's performance under varying conditions.
Article
Engineering, Environmental
Tao Xu
Summary: This study designed an electric propulsion unmanned ship and its automatic control system for water quality monitoring and automatic sampling in seawater. The unmanned ship can quickly recover during actual navigation, avoid obstacles, and obtain basic information of sea water within the specified range. The proposed method in this study outperforms various research methods.
WATER SCIENCE AND TECHNOLOGY
(2021)
Article
Energy & Fuels
Yijian Sang, Yu Ding, Jiarun Xu, Congbiao Sui
Summary: In this study, an integrated simulation model of ship propulsion and maneuvering system is established and validated. A benchmark cargo ship and a selected coastal service are used for case study. The fuel consumption under different conditions is calculated and analyzed, and the most reasonable case of saving fuel consumption is provided. This study investigates the influence of multiple factors on ship fuel consumption and provides theoretical suggestions for reducing fuel consumption over ship voyages.
Article
Engineering, Marine
Wongwan Jung, Daejun Chang
Summary: This study proposes a deep reinforcement learning-based energy management strategy for a hybrid electric ship propulsion system. The strategy integrates a liquid hydrogen fuel gas supply system, a proton-exchange membrane fuel cell, and a lithium-ion battery system. The proposed strategy demonstrates superior performance compared to benchmark algorithms and achieves higher operating expenditure. It also achieves efficient operation within the PEMFC system's optimal efficiency range.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Electrical & Electronic
Patrick Wheeler, Thusara Samith Sirimanna, Serhiy Bozhko, Kiruba S. Haran
Summary: The concept of electric propulsion in transportation has a long history, with electric cars existing nearly 200 years ago. The global society is now moving towards more electric transportation solutions, including electric propulsion for aircraft. This includes both all-electric systems and a variety of proposed hybrid propulsion systems, with ongoing research and development in motors and drives to ensure feasibility for the future of passenger flight.
PROCEEDINGS OF THE IEEE
(2021)
Article
Engineering, Marine
Arthur Vrijdag, Michele Martelli
Summary: This paper explores the application of deterministic identification techniques in creating simulation models for ship propulsion systems, as an alternative to data-driven techniques requiring extensive time and effort. By conducting experiments and comparing experimental and simulated results, the value and potential of this approach are demonstrated.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Thermodynamics
Zhuang Wang, Li Chen, Bin Wang, Lianzhong Huang, Kai Wang, Ranqi Ma
Summary: This study proposes an integrated optimization method to reduce fuel consumption and greenhouse gas emissions of cruise ships, considering environmental changes during the voyage.
Article
Automation & Control Systems
Changyu Lee, Jinwhan Kim
Summary: This paper proposes a model predictive anti-spin thruster control algorithm that can improve the propulsion efficiency of electric ships. The algorithm controls the rotational speed of the propeller with consideration of time-varying load conditions. Numerical simulations validate the feasibility of the proposed algorithm and compare its performance with other controllers.
CONTROL ENGINEERING PRACTICE
(2023)
Article
Engineering, Aerospace
Jona Eissele, Stefan Lafer, Cristian Mejia Burbano, Julian Schliessus, Tristan Wiedmann, Jonas Mangold, Andreas Strohmayer
Summary: This paper explores the hybridization of a 50-passenger regional aircraft to achieve the lowest emissions in 2040. By using liquid hydrogen as an innovative power source and a fuel-cell system, the emissions can be reduced to zero and the energy efficiency can be maximized. The aircraft design resulting from the analysis of flight and ground phases significantly reduces operating costs. Promising technologies and their potential impacts on the future of aviation are discussed. Overall, the hybridization of regional aircraft is promising and feasible by 2040, but further research is needed in fuel-cell technology, thermal management, and hydrogen production and storage.
Article
Environmental Studies
Shukai Chen, Qiang Meng, Peng Jia, Haibo Kuang
Summary: This study proposes an operational mode-based method for estimating ship emission inventory, which categorizes ship emissions based on different operational modes and applies various methods for emission estimation. It suggests that port operators can reduce emissions by limiting sulfur content in fuel oil and requiring tugs to operate with a lower engine load.
TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT
(2021)
Article
Chemistry, Multidisciplinary
Giuseppe Palaia, Karim Abu Salem, Alessandro A. Quarta
Summary: This paper conducts a conceptual analysis of the limitations on the development of hybrid-electric propulsion for regional transport aircraft. It identifies technological energy density, flight distance, and design paradigm as the main factors constraining the development. It emphasizes that the currently achievable energy density is the key limiting factor.
APPLIED SCIENCES-BASEL
(2023)
Review
Engineering, Aerospace
Agata Kusmierek, Cezary Galinski, Wienczyslaw Stalewski
Summary: The increasing interest in alternative aircraft propulsion systems is driven by international regulations and demands. The hybrid gas-electric propulsion system offers a solution to reduce fuel consumption and greenhouse gas emission, but there are technical challenges to be overcome.
PROGRESS IN AEROSPACE SCIENCES
(2023)
Article
Engineering, Marine
Sung-An Kim
Summary: This study presents simplified model constructions for a hybrid propulsion ship using a real-time simulator to improve dynamic model accuracy and computation speed. It also proposes a hardware-in-the-loop simulator to evaluate the electro-dynamic characteristics of the ship. The validity of the proposed model on the simulator is verified by simulation compared to a detailed model on an electronic circuit simulation software.
JOURNAL OF MARINE SCIENCE AND TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Sepideh Jafarzadeh, Harald Ellingsen, Svein Aanond Aanondsen
JOURNAL OF CLEANER PRODUCTION
(2016)
Article
Environmental Studies
Sepideh Jafarzadeh, Nicola Paltrinieri, Ingrid Bouwer Utne, Harald Ellingsen
TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT
(2017)
Article
Thermodynamics
Sepideh Jafarzadeh, Ingrid Bouwer Utne
Article
Green & Sustainable Science & Technology
Friederike Ziegler, Sepideh Jafarzadeh, Erik Skontorp Hognes, Ulf Winther
Summary: The study quantified greenhouse gas emissions of important seafood products from Norway and suggested a simplified approach for monitoring production-related emissions. Results showed potential for improvement within each production system and variations in emissions trends for different seafood products.
JOURNAL OF INDUSTRIAL ECOLOGY
(2022)
Article
Engineering, Environmental
Francesco Zanobetti, Gianmaria Pio, Sepideh Jafarzadeh, Miguel Munoz Ortiz, Valerio Cozzani
Summary: The urgent need to reduce harmful pollutants in maritime transport led to the development of alternative propulsion systems based on clean fuels or carbon-neutral energy vectors. However, these alternative solutions present safety concerns. An innovative methodology was developed to assess the inherent safety performance of alternative systems during early design stages. A case study of long-distance maritime transportation was conducted comparing the inherent safety performances of LNG, LH2, and LNH3 systems to the benchmark MGO. Uncertainty and robustness of the safety ranking were tested using a Monte Carlo analysis, revealing similar safety performances for LNG technologies, limitations in LH2 safety due to immature storage technologies, and safety issues related to the toxicity of LNH3.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Environmental Sciences
Wenhao Chen, Sepideh Jafarzadeh, Maitri Thakur, Guorun Olafsdottir, Shraddha Mehta, Sigurdur Bogason, Nicholas M. Holden
Summary: Animal-based food supply chains have significant environmental impacts influenced by production systems, distribution networks, and consumption patterns. Life cycle assessment was used to model the environmental impacts of different animal-based food chains and found that reduction in food waste and use of sustainable aviation fuel can lead to significant reductions in greenhouse gas emissions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Proceedings Paper
Engineering, Ocean
Sepideh Jafarzadeh, Ingrid Schjolberg
PROCEEDINGS OF THE ASME 36TH INTERNATIONAL CONFERENCE ON OCEAN, OFFSHORE AND ARCTIC ENGINEERING, 2017, VOL 10
(2017)
