A bulk carrier with comprehensive energy-saving effect meeting the high stage requirements of eedi

Abstract

The invention discloses a bulk carrier whose comprehensive energy-saving effect meets the high-stage requirements of EEDI, and relates to the field of ship design. The bulk carrier performs an optimized line design according to the ship shape characteristics of the bulk carrier, and is based on the integration of ship-propeller-energy-saving attachment Based on the concept of modernization, a comprehensive hydrodynamic energy-saving system that matches the low-resistance linear shape of high-efficiency propellers, pre-swirl guide wheels, vortex-eliminating fins, and twisted rudders is designed, and an air layer drag reduction system that matches the ship type is designed to reduce ship frictional resistance. , and increase the flat bottom area of ​​the hull to match it, design a wind boost system that matches the ship type to provide boost force, and equip the bulk carrier with a variable speed constant frequency shaft engine system to reduce drag in the atmosphere and wind boost the rotor Power supply, make full use of the rich energy of the main engine, and further reduce the ship's fuel consumption and CO 2 Emissions are organically coordinated and unified with bulk carrier hull, electrical, turbine and other systems to form a comprehensive energy-saving system for the whole ship, so that it can meet the EEDI requirements at different 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 important issues facing the world. As a responsible major country, China proposed in 2020 the ambitious goal of carbon peaking by 2030 and carbon neutrality by 2060. It is imperative to reduce carbon emissions in the shipping industry, which undertakes 80% of the global trade and transportation tasks and accounts for 2.89% of the global CO2 emissions in 2018. In recent years, the International Maritime Organization (IMO) has formulated a series of environmental regulations to promote energy conservation and emission reduction of ships, including the preliminary GHG emission reduction strategy, the Energy Efficiency Design Index (EEDI) Guidelines for New Ships, and the Energy Efficiency Design Index (EEXI) Guidelines for Existing ...

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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