Neural Network-Based Engine Propeller Matching (NN-EPM) for Trimaran Patrol Ship

Abstract

In recent years efforts on reducing fuel consumption has become the greatest issue related to energy crisis and global warming. The reduction of fuel consumption can be obtained, if the ship propulsion could be operated in its best performance level. Generally this is done by an appropriate analysis of engine propeller matching (EPM). In this study an EPM based on neural-network method, or NN-EPM, is established to predict the best performance of main engines, leading at minimum fuel oil consumption. A trimaran patrol ship is selected as a case study. This patrol ship is equipped with two 2720 kW main engines each connected to a controllable pitch propeller (CPP) through a reduction gear. The input parameters are ship speedVand service margin SM, with the corresponding output parameters comprise of engine speednE, engine break horse powerPB, propeller pitchP/D, and the fuel consumptionFC. An NN-EPM 2-20-15-4 configuration has been constructed out of 100 training data and then validated by 30 testing data. The maximum relative error between results from NN-EPM and EPM analysis is 2.1%, that is in term of the fuel consumption. For other parameters the errors are well below 1.0%. These facts indicate that the use of NN-EPM to predict the main engines's performance for trimaran patrol ship is satisfactory.

Influence of EEDI (Energy Efficiency Design Index) on Ship–Engine–Propeller Matching

“…Esmailian et al developed the approach to optimize the propeller-hull system simultaneously with two objective functions considered, i.e., lifetime fuel consumption (LFC) and the cost function including thrust, torque and open water propeller efficiency, to design a hull-propeller system with minimum LFC and cost [21]. Koenhardono et al established an engine-propeller matching model based on the neural network algorithm to predict the best performance of main engines, and to achieve minimum fuel consumption [22]. Meanwhile, with more concern on the environmental impact, there are some researches on the relationship of the ship propulsion system and its emission in order to meet the corresponding regulation requirements.…”

A Review of Solar-Powered Boat Development

“…more available in the future. The use of renewable energybased technology may also reduce the ship operation cost because of the uncertain price of oil [2]- [5].…”

Comparative of Feasibility Study Between Diesel Mechanical Propulsion System and Combination of Diesel Engine and Electric Motor Propulsion System on Offshore Patrol Vessel (OPV) 80 m

“…A propulsion system is a combination of mechanical and electrical propulsion systems, that is called by hybrid propulsion system or combination of diesel mechanic or electric (CODAE) propulsion system. Therefore, the CODAE system can operate as a mechanical, electrical or mechanical and electrical combination system [3][4][5][6][7][8][9]. Selection of operating mode on a CODAE propulsion system is adjusted to the existing propulsion power requirement, so that it can maintain to operate at optimal conditions.…”

“…This system has four propulsion modes: shaft motor, shaft generator, mechanical, and booster modes [3][4][5][6][7][8][9]. These various propulsion modes could adapt to meet the requirement of the various OPV 80 m's operation condition.…”