A Set Covering Model for a Green Ship Routing and Scheduling Problem with Berth Time-Window Constraints for Use in the Bulk Cargo Industry

This paper presents a set covering model based on route representation to solve the green ship routing and scheduling problem (GSRSP) with berth time-window constraints for multiple bulk ports. A bi-objective set covering model is constructed with features based on the minimization of the total CO2 equivalent emissions and the total travel time subject to a limited number of berths in each port, berthing time windows, and the time window for each job. The solutions are obtained using the ε-constraint method, after which a Pareto frontier is plotted. This problem is motivated by the operations of feeder barges and terminals, where the logistics control tower is used to coordinate the routing and berthing time of its barges. We show that the proposed method outperforms the weighted sum method in terms of the number of Pareto solutions and the value of the hypervolume indicator.

Systematic Analysis on Key Success Factors and Strategic Planning of Green Ship Development

In today’s era of advocating green and low carbon, the development of green ships based on new technologies and new energy can improve the status of China’s shipping enterprises in the world. Specifically, such development is of great significance to marine environmental protection and can promote the sustainable development of China’s economy. By referring to relevant literature on green ships, this study summarizes 20 development indicators of green ships as the basis for the questionnaire design. On the basis of the data collected from the questionnaire, the grey relational analysis method is used to extract six key development indicators of green ships. TRIZ analysis is also adopted to establish innovative improvement strategies for each key indicator. Subsequently, the short-, medium-, and long-term development planning of these strategies are summarized according to the order of strategic development. Such strategies are also divided into three development directions according to their content: intelligent systems, incentive systems, and green devices. Therefore, the strategic planning of this study can provide a clear guide for shipping enterprises to develop green ships and allocate resources according to the key indicators of green ships under limited resources, which can serve as the foundation for achieving further successful development in the fiercely competitive domestic and international markets.

Naval Energy Management System

The paper analyses the role of control and monitoring of electro-energetic equipment in order to reduce operational costs, increase profits and reduce carbon emissions. The role of SCADA and EcoStruxure Power systems is presented and analysed taking into account the energy consumption and its savings. The paper presents practical and modern solutions to reduce energy consumption by up to 53%, mass by up to 47% and increase the life of the equipment by adjusting the electrical parameters. The Integrated Navigation System has allowed an automatic control and an efficient management. For ships, the implementation of an energy efficiency design index and new technologies was required for the GREEN SHIP project.

Определение EEDIweather при продольной качке судна с крыльевыми устройствами в репрезентативном состоянии моря

В статье предлагается индекс энергетической эффективности (EEDI) контейнеровоза на встречном волнении. Поскольку EEDI является мерой выбросов CO2 из судов в спокойной воде, которая редко встречается в океане, ИМО определила EEDI для репрезентативных морских условий под названием EEDIweather. При расчете EEDIweather рассчитаны не только для простого судна, но и для судна с крыльевыми устройствами, движимого полностью или частично за счет использования энергии волнения. Энергосберегающее судно с крыльевыми устройствами способствует направленному влиянию на его продольную качку с целью уменьшения амплитуд качки и снижает дополнительное сопротивление на волнении. Продольная качка судна заданного типа, обводов и размерений на заданном регулярном волнении рассчитывается на основе совместных уравнений вертикально-килевой качки. EEDIweather зависит от дополнительных сопротивлений на встречных ветрах и волнах, таким образом, судно с крыльевыми устройствами оказывает влияние уменьшения EEDIweather в репрезентативных морских условиях. В ходе расчетов демонстрируется влияние на EEDIweather удлинения и площади энергосберегающих крыльев, а также эффект реализации EEDIweather при совместном использовании носового и кормового крыльев по сравнению со случаем использования только одного (носового или кормового) крыла. Результаты снижении EEDIweather связаны с главной целью статьти о количестве вредных выбросов в атмосферу и с обеспечением защиты окружающей морской среды путем использавания концепции Зеленого судна.Proposed in this paper is the Energy Efficiency Design Index (EEDI) of a container ship on a head sea. Since EEDI is a measure of CO2 emissions of ships in calm waters, which are rarely found in the ocean, IMO has defined EEDI for a representative marine environment called EEDIweather. When calculating the EEDIweather, not only a ship but also a ship with wing devices fully or partially propelled through the use of wave energy is calculated. An energy-saving ship with wing devices contributes to the directional influence on its longitudinal motion to reduce motion amplitudes and reduces additional resistance on waves. The longitudinal motion of a ship of given type, geometry, and dimensions on prescribed regular waves are determined to utilize numerical solutions of coupled equations of a ship pitching and heaving. The EEDIweather is dependent on additional resistances on headwinds and waves, so a ship with wing devices has the effect of reducing the EEDIweather in representative sea conditions. Demonstrated in the calculations is the influence upon the EEDIweather of the aspect ratio and reference area of the wings, and also the effect of using simultaneously the bow and stern wings as compared to using just one (bow or stern) wing. EEDIweather reduction results are related to the main goal of the article to the number of harmful emissions into the atmosphere and to ensure the protection of the marine environment through the use of the Green Ship concept.