Toward Safer, Smarter, and Greener Ships: Using Hybrid Marine Power Plants (original) (raw)
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—Recognizing the importance of electric ships and the myriad of technical challenges they present, the University of Texas at Austin, with seed funding from the Office of Naval Research, established a virtual electrical ship research and development center. The reason for the virtual center is that the complex challenges of the future require multidisciplinary solutions. The virtual center contains staff members from Electrical Engineering, Mechanical Engineering and two research centers who work collaboratively with a number of other universities and with industry. This program has two anticipated significant outcomes. At the system level, the first anticipated outcome is to develop a comprehensive set of modeling approaches that guide the evolution of electric ship power systems. The second outcome is an approach to the replacement of the hydraulic system on current ships with electrical actuators on future ships.
Electric ship power system - research at the University of Texas at Austin
IEEE Electric Ship Technologies Symposium, 2005., 2005
Recognizing the importance of electric ships and the myriad of technical challenges they present, the University of Texas at Austin, with seed funding from the Office of Naval Research, established a virtual electrical ship research and development center. The reason for the virtual center is that the complex challenges of the future require multidisciplinary solutions. The virtual center contains staff members from Electrical Engineering, Mechanical Engineering and two research centers who work collaboratively with a number of other universities and with industry. This program has two anticipated significant outcomes. At the system level, the first anticipated outcome is to develop a comprehensive set of modeling approaches that guide the evolution of electric ship power systems. The second outcome is an approach to the replacement of the hydraulic system on current ships with electrical actuators on future ships.
2013
This paper deals with the application of integrated power systems in small passenger ships. Namely, integrated power systems were up to now mostly used in naval and large passenger ships, primarily for financial reasons. However, despite their complexity, such systems allow for much more versatility and their application in small passenger ships seems to be advisable in the context of environmental issues. Environmental aspects of maritime transportation are discussed, the needs for environmentally-friendly ships in the Adriatic Sea are elaborated and a review of actual IMO Regulations is provided, pointing out the effects of introducing new fuel-efficient and electrified ships. Different power systems of a ferry operating in the Adriatic Sea are analyzed in detail, with particular emphasis on gas emissions. Direct mechanical propulsion system and integrated power system in real operating conditions are considered and some advantages and drawbacks of both are examined. Finally, disc...
REAL-TIME MARINE VESSEL AND POWER PLANT SIMULATION
In this paper, we present a system simulator of a marine vessel and power plant which contains the mechanical system with diesel engines, propellers, steering gear, and thrusters; the electrical system with generators, switchboards, breakers, and motors; and the plant level controllers with dynamic positioning controller, thrust control, and power management system. Interconnections are possible to simulate by using a multi domain simulator. This is important when evaluating system performance and fault handling. The simulator is implemented in Simulink and is modular, configurable and scalable. It can be extended to run on National Instruments' cRIO embedded control and acquisition system, for real-time simulation. Copyright c 2015 by ASME will be flexible to study hybrid power plants as well including e.g. batteries, gas turbines. Use of batteries in combination with diesel-engine sets for power generation is on-going research.
4Integrated Shipboard Power and Automation
Control system requirements for highly automated and survivable future electric warships are presented herein to stimulate and unify interdisciplinary research conducted under the joint NSF/ONR Electric Power Networks Efficiency and Security (EPNES) initiative. This ONR challenge problem focuses on continuity of control for interdependent shipboard engineering and damage control systems under hostile conditions. The mission statement for these Hull, Mechanical, Electrical & Damage Control (HME&DC) systems may be summarized as: Provide continuous mobility, power, and thermal management for shipboard combat systems despite major disruptions involving cascading failures. This challenge problem is prototypical of analogous complex, interdependent systems including the national power grid, military and civilian infrastructure, and transport systems. These nonlinear, distributed, heterogeneous, variable structure systems contain dynamically interdependent subsystems. Mission/life critical system integrity and fault tolerance requirements demand dependable continuity of service. Innovative, dependable, and affordable control system architectures, strategies, algorithms, methods and tools are sought. After a brief problem statement and discussion of shipboard control systems, the ONR control challenge problem and reference system are presented.
Marine Vessel and Power Plant System Simulator
IEEE Access, 2015
Modern marine electric propulsion vessels have many systems. These interactions and integration aspects are essential when studying a system and subsystem behavior. This is especially important when considering fault scenarios, harsh weather, and complex marine operations. However, many simulators, including a selection presented here, study the positioning system and the power system separately. This paper proposes a simulator combining the two systems, as an extension to the marine systems simulator MATLAB/Simulink library. The intended use cases and the according design choices are presented. New subsystem models include a power-based electrical bus model and a simplified diesel engine model. Both are validated through the simulation against established models. In addition, established models for generators, electrical storage devices, thrusters, and a mean-value diesel engine model are summarized with rich references. Three case studies illustrate the multi-domain use of the simulator: 1) a semi-submersible drilling rig performing station keeping under environmental disturbances; 2) the same vessel subject to an electrical bus reconfiguration; and 3) a supply vessel with a hybrid power plant. INDEX TERMS Marine technology, marine vehicles, power system simulation, dynamic positioning.
Towards Modeling and Simulation of Energy Management System for a Hybrid Vessel
2019
Nowadays, ship design process has played an important role to determine the effectiveness of the shipbuilding project. Encouraged by this reason, a collaboration research between Ulstein Design & Solutions AS and Siemens about vessel system modelization from higher perspective has carried out by using Simcenter Amesim by Siemens. This research emphasizes on the interplay between the machinery and hydrodynamics systems. The purposes of this research are to build a model which couples machinery and hydrodynamics system on a common platform, to understand further the capability of Simcenter AMESIM in performing an innovative and complex simulation and to establish a sophisticated model to develop more efficient and environmentally vessel systems. The reasons why our case is regarded as a complex and innovative object is because the chosen vessel will be eventually retrofitted with a battery. For the system architect, this means that the focus is no longer on managing the power demand, but the energy demand. This shift in focus implies that time has to be taken into consideration in the simulations, and that the engineers have to adopt transient simulation models. Moreover, since this vessel will be retrofitted by a battery, electrification is also a main reason why this case is considered as a complex and innovative object. During this research, M.V. Acta Auriga, an offshore wind vessel is treated as our case. Ulstein position as the leader in such segment is the main reason why we consider this vessel as our case. Apart from that, offshore wind farm projects are becoming much more of a challenge, with the heavier and larger turbines moving to deeper waters far from land. It is a whole new situation with greater human and financial risks where the installation task itself is moving from relatively sheltered positions to the harsher weather and waves of the high seas. Encouraged by these reasons, offshore wind vessels come with the intention to solve these problems. Offshore wind vessels are reliable platforms which have flexibility to carry out many types of offshore wind installations and operations. This research will be focusing on the machinery models since marine machinery is the writer’s background, however, hydrodynamics calculations and measurement are also used as the complementary data to support the objective of this research. Produced power, torque, specific fuel oil consumption and vessel velocity are the main result to be counted for. Sea trial results are then used as the data validation data to evaluate the appropriateness of this model to represent the real condition. In addition, the sea trial results are also used to evaluate this model for being a breakthrough in terms of vessels performance improvement e.g. a battery installation or other power sources to increase the efficiency and at the same time to reduce the air pollution. As the results, the discrepancy between the simulation and the sea trial results are; 0.965% for the produced power, varies from 0% to 1.5% for the torque, 1% for the specific fuel oil consumption and 1.07063 knots for the vessel velocity. As we have determined 2.5% as the maximum threshold for the discrepancy, it reveals this model is appropriate enough to represent the real condition. And at the same time, this also shows us that Simcenter AMESIM is capable to simulate a complex and innovative system, in particular within the shipbuilding and design industry.