Electric Propulsion Applied for Research Vessel

Paper presents short operational and engineering analysis of underpowered propulsion in small electrically propelled small inland passenger ships. There is evidence that in certain weather conditions the phenomena of added aerodynamic resistance of small water crafts may have serious influence on their speed and manoeuvrability. Existing regulations like class societies rules for ship classification and construction or EU Directive 2006/87/EC do not provide any requirements or guidelines on prediction of air or hydrodynamic resistance or propulsion power computations to be assessed by third party in design process. In the opinion of authors, the case is particularly important when electrical or hybrid propulsion is considered as prime mover. Existing knowledge allows for engineering analysis to be conducted to provide better knowledge on the selection and construction of innovative propulsion machinery for ships where passengers safety is major factor of concern by waterways administration, class societies and insurance institutions.

2013

In the present work a research boat or specifically geography boat was developed where the diameter the propeller is dimensioned, for the reason that advantages electric propulsion is used for this type of vessel. The analysis necessary to determine of power propulsion of the ship, shaft and propeller was necessary to take account the totally weight of the ship and her navigation velocity. In this work the weight of the every part of the ship were considerate, as: electric equipment, mechanic equipment, hull structure, and crane, etc. Then the preliminary design of the hydrographic boat was developed where a group of the three engineers was constituted for realize this work.

2007

This paper presents design assumptions, technical conditions and two kinds of design solution of propulsion system for an inland waterways ship. In the first version this is a combustion-electric system fitted with frequency converter and in the other-combustion-hydraulic one with hydrostatic reduction gear. There are also a preliminary comparative analysis of these systems.

Energy Procedia, 2015

This research was intended to use electric motor in order to replace fossil fuel consumption engines. By focusing on the development of electrical propulsion system (EPS), one had to find the motor which was compatible with 4 m length boat model. The target of this development was attempting to design the electric drive which could reach up to 5 knots. The electricity of EPS was supplied by 4 batteries providing 24 volts of direct current, while thrust of the vessel was delivered by 3-phases 2.2 kW squirrel cage induction motor. The in-house designed inverter, converting from direct current system to 3-phase system, was coupled between batteries. The onsite experiment was carried out in the open-sea at Sriracha Bay, west of the campus. The results indicated that the maximum speed of the system could reach 5 knots within 1 kilometre distance.

Jurnal Airaha, 2021

Electrical energy on fishing vessels is an unavoidable energy requirement, the electric source on board is obtained from an electric generator which is generally driven by a diesel engine. Electrical energy on fishing vessel is used for lighting, navigation purposes and assisting fishing activities to loading and unloading. The electric generator on fishing vessel will operate properly and have a long service life if the load applied to the generator does not exceed the load factor limit. Researchers carried out several stages, i.e: identify the electric power distribution system, identify the generator capacity and electrical load received, calculate the electrical load on different operational conditions. In this study, it is also known that the operating efficiency of the generator under four different operational conditions. The results of the research, this fishing vessel uses a radial electrical distribution system; using two units of electric generator with identical specific...

Jurnal Rekayasa Mesin

The purpose of this study was to design a 3 Gross Tonnage (GT) fishing boat with a speed of 6 knots to obtain the shape and size of the vessel that is suitable for the water area that using the solar panel energy system. The ship was planned to travel about a maximum of 18 Km from the departure point. The steps of the research method for the design of fishing vessels include determining the principal size of the ship, making line drawings, drafting a general plan, construction design, ship tonnage capacity, electricity requirements, and then designing solar panel energy systems. This research resulted in a ship design with a length of 8 meters, 1.75 meters wide, and 1.3 meters high. Those specifications are used as constraints to determine the number of solar panels and batteries. To satisfy all of the goals, the 3 GT boat has limited 0.9KWh solar panels to travel for 9.7 NM (18 KM) at a speed of 6 knots, forcing daytime and night fishing fishermen to idle for 1 day. The difference ...

International Journal of Marine Engineering Innovation and Research, 2017

 electric propulsion is the ship system using propulsion motor to replace performance of main engine. The application of diesel engine as propulsion system have some problems and weaknesses such as diesel engine unability to operate when submersible vessel is operating under sea. To overcome that problems in submersible vessel, alternative solution of ship propulsion is required. DC Motor can be used as this alternative solution. Submersible vessel use electric propulsion system with DC Motor because DC Motor has advantages of easy rotation setting and does not cause noise when submersible vessel is diving. This bachelor thesis will study the application of DC Motor as an electric propulsion system on submersible vessel with length 59,57 m in series and parallel circuit by simulation using MATLAB software. The simulation data obtained are rotation and torque of DC Motor. From these simulation, it can be concluded that parallel circuit rotation is greater than series circuit rotation. It caused the greater speed and lower power in parallel circuit.

International Journal of Marine Engineering Innovation and Research, 2018

Electric propulsion system is ship propulsion system using electric motor to replace performance of main engine. Submersible ships use DC motor as electric propulsion system because DC motor has advantages of speed control and lower propulsion noise when submersible ship is at submerge condition.Design of electric propulsion system is using two DC motor thatare connected in series. Battery and generator as its power supply. Designs of electric propulsion system that will be reviewed hereare using ohmformerand without using ohmformer. Those designs will be simulated usingMATLAB Simulink.The results of the simulation are thatthe design using ohmformerisgreater in speed and power than without using ohmformer. Because of usingohmformer can control input voltage of DC motor thatuse generator as its power supply. Meanwhile, ohmformer-less design has constant input voltage that use battery as its power supply. Next, design of using ohmformer can be used for silent run (low speed), sailing run (medium speed) and quick run (high speed). Then design of without using ohmformer can be used for sailing run (medium speed).

Since 1910 the first vessel utilized diesel engine as main booster, at once the oil became the main necessary of ship operation today, while the oil is one of unrenewable energy resources. In this era, the stock of oil is getting reduce, whereas the necessary of oil as the fuel is getting increase. To overcome this matter, the writer has innovation of hybrid system using for ship’s propulsion by utilizing the sea’s flow which through the hulls of the catamaran for its function to boost the generator’s turbine as electrical producer. Design innovation of the ship’s construction that we made is by double hull (catamaran) which is modified by pursing the inner hull so the flows velocity between the both hulls increase and the water flow could to stir the turbine that has been installed in the stern ship. the fuel consumption is more efficient, because the diesel generator helped by turbine generator to supplayed electrical to the water jet pumps. The hybrid solution will lead to about up to 40% reduced fuel consumption while operating the ship. As well as reduced capital costs compared to the conventional power generation system.

ijera.com

Problems involving in marine propulsion mechanism during wars intercepting an attacking missile are well known. Such may be the case in defense in which a torpedo attacks against a ship. This project describes a better way of controlling the navigation and propulsion system. For this Electro-hydraulic and Electrically driven models are designed. Electro-hydraulic actuator consists of several dynamic parts which are widely used in motion control applications. These dynamic parts need to be controlled to determine direction of motion. In this project, mathematical model of EHS is required in order to design a controller for the better response of the system and the performance of the system is monitored in simulation mode. In the Electric propulsion system, induction motor is used to drive the marine propeller. The control is affected by ocean surface waves, ocean currents, wind, weather and also ship motion. In this project, speed of induction motor is controlled using flux comparator.