Bulk cargo ship with comprehensive energy-saving effect meeting EEDI high-stage requirements

Abstract

The invention discloses a bulk cargo ship capable of meeting the EEDI high-stage requirement through the comprehensive energy-saving effect and relates to the field of ship design. The bulk cargo ship carries out optimal linear design according to the characteristics of a bulk carrier ship type, based on the ship-paddle-energy-saving appendage integration concept, a comprehensive hydrodynamic energy-saving system matched with a low-resistance linear efficient propeller, a front prerotation guide wheel, vortex elimination fins and a twisted rudder is designed, an air layer resistance reduction system matched with the ship type is designed, ship friction resistance is reduced, the flat bottom area of a ship body is increased, and the ship body is matched with the air layer resistance reduction system; a wind power boosting system matched with a ship type is designed to provide boosting force, a variable-speed constant-frequency shaft generating system is arranged for the bulk cargo ship to supply power to an air layer drag reduction rotor and a wind power boosting rotor, abundant energy of a main engine is fully utilized, fuel oil consumption and CO2 emission of the ship are further reduced, and by means of organic coordination and unification with a bulk cargo ship body, electricity, a turbine and other systems, a whole-ship comprehensive energy-saving system is formed so that the whole-ship comprehensive energy-saving system can meet EEDI requirements of different subsequent stages in advance.

Description

technical field [0001] The invention relates to the field of ship design, in particular to a bulk carrier whose comprehensive energy-saving effect meets the high-stage requirements of EEDI. Background technique [0002] Climate warming is one of the most important issues facing the world. As a responsible major country, China put forward the ambitious goal of carbon peaking in 2030 and carbon neutrality in 2060 in 2020. It is imperative to reduce carbon emissions in the shipping industry, which undertakes 80% of the world's trade and transportation tasks and accounts for 2.89% of global CO2 emissions in 2018. In recent years, the International Maritime Organization (IMO) has formulated a series of environmental protection regulations to promote energy conservation and emission reduction of ships, including preliminary strategies for GHG emission reduction, guidelines for energy efficiency design index (EEDI) for new ships, guidelines for energy efficiency design index (EEXI)...

AI Technical Summary

Problems solved by technology

[0003] The existing technical measures to improve the energy efficiency of ships mainly include: ship type design technology, energy-saving propulsion technology, innovative energy-saving technology, alternative fuel technology, etc. Among them: the use of new alternative fuels can solve the problems of EEDI and carbon emission reduction, but most of them replace Due to limitations in technology maturity, fuel availability, economy, infrastructure, etc., the fuel does not yet have the conditions for actual ship application; innovative energy-saving technologies represented by wind boosting and air layer drag reduction have significant energy-saving effects , the technology maturity is also being continuously improved, and has gradually become a hot spot of research and development at home and abroad, with broad application prospects; conventional energy-saving technologies such as ship type design and energy-saving propulsion have a high maturity and a high market application rate

[0004] As the requirements of EEDI become more and more stringent, the benefits brought by the application of individual energy saving and emission reduction technologies are extremely limited, far from meeting the requirements of the high stage (phase 3 / phase 4) of EEDI

However, the combined application of multiple energy-saving technologies is not simply superimposed on each other. There may be problems of mutual interference between different energy-saving technologies. It is necessary to consider the matching design between each other, and also the matching design with the ship type. more difficult

Therefore, at present, most ships are still in the stage of applying conventional energy-saving technologies. A small number of ships have applied a single innovative energy-saving technology, and even a few have applied a combination of 1-2 energy-saving and emission-reduction technologies. There is a large gap in phase 3 requirements, and it is difficult to meet the high-level requirements of EEDI

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