An overview of integrating two energy efficient and emission reduction technologies to improve ship energy efficiency under advanced data analytics is presented in this study. The proposed technologies consist of developing engine and propulsion innovations that will be experimented under laboratory conditions and large-model-scale sea trials, respectively. These experiments will collect large amount of data sets that will be used to quantify the performance of both innovations under the advanced data analytics framework (ADAF). Hence, extensive details on the ADAF along with preliminary data sets collected from a case study vessel are presented in this study.

Emission Reduction Strategy

The international maritime organization (IMO) has initiated an extensive greenhouse gas (GHG) reduction strategy that envisages a considerable reduction in the carbon intensity of the international shipping industry. This strategy consists of reducing CO2 emissions per transport work, as an average across the international shipping industry, e.g. at least 40% by 2030, and continues efforts towards 70% by 2050, compared to the 2008 levels (IMO, 2020a). Furthermore, GHG emissions due to the international shipping industry is to peak as soon as possible, therefore it is required to reduce the total annual GHG emission, at least 50% by 2050 compared to the 2008 levels. Carbon intensity based energy efficiency measures have been formulated by IMO under two main mandatory initiatives of the energy efficiency design index (EEDI) for new ships and energy efficiency existing ship index (EEXI) for existing ships (IMO, 2020b). The EEDI indicates the energy efficiency of ships compared to a baseline vessel that should be satisfied during the design phase. Hence, the required ship structural modifications to satisfy the EEDI can be introduced during the design and construction phases of the vessel. The EEXI indicates the energy efficiency of ships compared to a vessel that should be satisfied during the operational phase. Since major ship structural modifications cannot be introduced during this phase, the required technological innovations (i.e. ship systems as retrofitting technologies) should be introduced to satisfy the EEXI during the vessel operational phase. Therefore, the required technological innovations including alternative fuels and/or energy sources to satisfy the EEXI during the ship operational phases should be considered and their capabilities of delivering the IMO emission reduction ambitions should be investigated. The outcomes of this study will contribute to achieve those objectives, where an advanced data analytics framework (ADAF) that can quantify the performance of two selected innovative technologies with respect to the IMO emission reduction targets are developed as the main contribution.

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