Control system for fuel consumption minimization–gas emission limitation of full electric propulsion ship power systems

Abstract

Environmental pollution caused by ships’ green house gas emissions and worldwide concern about air quality and oil supplies have led to stricter emissions regulations and fuel economy standards. In this regard, respective limits are set, while efforts to provide general guidelines for the achievement of economic and green ship operation with an urge to ship operators to apply them and return feedback. Also, specific design and operation indicators have been proposed in order to ensure compliance with new emissions regulations and fuel economy standards. Up to now, these indices are limited to ships comprising conventional propulsion systems, while full electric propulsion systems are not examined. In this article, an integrated control system that attains economically optimized and environmentally friendly operation is proposed. Moreover, appropriate reformulation of energy efficiency operation indicator is proposed for real-time assessment of gas emissions. The study is supported with the presentation of results obtained from the simulation of the operation of a ship power system comprising full electric propulsion.

Design for safety and energy efficiency of the electrical onboard energy systems

“…The objective function is optimised subjected to a number of technical and cost constraints for the optimum unit commitment and load sharing of the generation units [5]. The objective function is: …”

Influence of the required EEDI reduction factor on the CO 2 emission from bulk carriers

“…Theotokatos and Tzelepis (2013) performed a performance and emission parameters mapping of a propulsion system that can be used to minimize the fuel consumption and gaseous emissions. Kanellos et al (2014) proposed a control system for fuel consumption minimization -gas emission limitation leading to the minimization of a criterion leading to a green and economical operation of the ship. Roh (2013) determined economical shipping routes based on real-time marine information and the estimation of the fuel consumption.…”

A cost-effective and emission-aware power management system for ships with integrated full electric propulsion

“…Optimal power generation scheduling combined with demand side management will result in several positive effects in ship design and operation; like the reduction of the number of the prime movers, further fuel cost reduction, efficient limitation of GHG emissions etc. Some other measures that are examined in the related literature to improve ship power system efficiency are listed in the following: energy management and vessel performance [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29], route optimization and voyage efficiency [22,23], slow-steaming (reduction of ship cruising speed) [28], effective demand side/load management [11,18,19,23], means of smart electric energy generation [16,25], cold ironing [17,22], and electric energy saving devices and energy storage systems (ESS) [19,20,23].…”