It is proposed to install a hybrid fuel cell electric propulsion system on a domestic ferry. The fuel cell hybrid system is compared with the existing diesel propulsion system for this ferry using a developed time-domain threedegree of freedom ship simulator implemented in the MATLAB/Simulink environment. Performance comparison of the two systems is made in terms of first cost, fuel cost, syste...

A summary of the propulsion system modeling under NASA’s High Speed Project (HSP) AeroPropulsoServoElasticity (APSE) task is provided with a focus on the propulsion system for the lowboom supersonic configuration developed by Lockheed Martin and referred to as the N+2 configuration. This summary includes details on the effort to date to develop computational models for the various propulsion sy...

In this paper, an overview of the techniques applied to AC electric propulsion field has been done. Actual study cases of electric ship propulsion schemes are considered. An impartial comparison between three-level converters versus two-level converter from the viewpoint of electric ship propulsion requirements has been done. Diodeclamped three-level converters using direct torque control (DTC)...

some of the important mechanical loads in the civil and military industries are variable speed and power and their efficiency. mechanical coupling of two different electric motors is suitable for these types of application. using this technique reduces energy consumption of submarine’s motion system and submarine range would be increased. but the use of this technique requires a complex control...

This study aims at studying the reliability evaluation for the marine propulsion shaft system under the severe sea conditions. The variations of the contact stress between the bearings and the marine propulsion shaft under the severe sea conditions are analyzed using the finite element simulation. The stress-strength interference theory is used to evaluate the reliability of the marine propulsi...

Design of high-performance electric propulsion systems requires thorough dynamic analysis of both the electric power and propulsion systems. This paper presents a simple but effective method to model the relevant components in the electric and propulsion plants to facilitate the integration and analysis of the entire system for the purpose of predicting the overall system performance. The objec...

Original scientific paper Unexpected severe hull deformation caused by wave loads poses alignment problem to the propulsion shaft line in large scale ships, which would significantly influence the dynamical performance of the marine propulsion system. How to suppress negative disturbance imposed by the interaction between water-hull-propulsion and ensure the normal operation of the marine propu...