Abstract
With the increasingly strict international GHG (greenhouse gas) emission regulations, higher requirements are placed on the propulsion system design of conventional ships. Playing an important role in ship design, construction and operation, ship–engine–propeller matching dominantly covers the CO2 emission of the entire ship. In this paper, firstly, a ship propulsion system matching platform based on the ship–engine–propeller matching principle and its application on WinGD 5X52 marine diesel engine have been investigated. Meeting the energy efficiency design index (EEDI) regulation used to calculate the ship CO2 emission is essential and ship–engine–propeller matching has to be carried out with EEDI into consideration. Consequently, a procedure is developed combining the system matching theory and EEDI calculation, which can provide the matching results as well as the corresponding EEDI value to study the relationship between EEDI and ship–engine–propeller matching. Furthermore, a comprehensive analysis is performed to obtain the relationship of EEDI and system matching parameters, such as ship speed, effective power and propeller diameter, reflecting the trend and extent of EEDI when changing these three parameters. The results of system matching parameters satisfying different EEDI phases indicate the initial value selection in matching process to provide reference for the design of ship, engine and propeller under the EEDI regulations.
Highlights
Maritime transport is still the backbone of global transport over the entire world due to its large trade volume and low unit transportation cost
efficiency design index (EEDI) is a mandatory regulation of ship CO2 emissions proposed by International Maritime Organization (IMO)
Regarding to the study of EEDI, few attention is paid to the perspective of ship–engine–propeller design and matching
Summary
Maritime transport is still the backbone of global transport over the entire world due to its large trade volume (big ships) and low unit transportation cost. To limit the GHG emission of marine vessels, the International Maritime Organization (IMO) has put forward the energy efficiency design index (EEDI) regulations. EEDI is an indicator of the ship energy efficiency, which is calculated, based on a complex formula, as the ratio of the ship’s potential CO2 emission to its available capacity for transporting useful weight. The main engine drives the propeller through the ship’s shaft system to generate thrust to propel the ship at the desired speed, making ship–engine–propeller matching a key problem in propulsion system design. The investigation on the influence of EEDI on the ship–engine–propeller matching is useful for the design of an EEDI-satisfying ship propulsion system by offering reference of some key design parameters at the early ship design stage
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