31 January 2025
This document contains in the annex the "proposed assessment methodology tiers to measure wind propulsion in the attained GFI" as referred to in document MEPC 83/7/33 (IWSA).
This document provides a set of assessment methodologies for wind propulsion installation energy contributions so that wind energy can be incorporated into the mid-term measures developed to implement the 2023 IMO Strategy on reduction of GHG emissions from ships, with reference to the technical measures currently being prepared. This set of tiered methodologies support the proposed amended formula outlined in document MEPC 82/7/9 (IWSA) which in turn is based on the work presented in document ISWG-GHG 16/2/7 (Austria et al.). This proposed tiered approach to the application of these methodologies enables a level of flexibility without compromising accuracy enabling iterative improvements and optimization of these approaches as further knowledge and data feedback into the system framework. The Annex to this paper is published separately as MEPC 83/INF.33 Proposed assessment methodology tiers to measure wind propulsion in the GFI
Sea trials for assessing the power saving from wind assisted propulsion The purpose of this procedure is to provide a short-term method for verification of the power saving due to a Wind Propulsion Technology (WPT) installation. The minimum test program can be conducted within one day and includes around 5 wind conditions. The scope can be extended to include a larger number of conditions, and be conducted over a longer period of time during operation.
7 October 2022
This document considers several areas relevant to the characterization of the current state of technology and development of Wind Propulsion Technologies (WPTs) for ships. The role of such technologies is presented in the wider context of decarbonization in shipping enabling the sector to go 'beyond compliance' and future-proof ships. In addition to technological aspects, the document includes references to several projects highlighted as case studies. Market forecasts, policy/regulatory development, technical studies and standardization/class developments are also included as part of a developing framework where wind propulsion takes shape as a technically reliable and mature technology option Submitted to MEPC 79 at International Maritime Organisation (IMO) by IWSA in partnership with Finland, France, Saudi Arabia, Solomon Islands, Spain, Union of Comoros, and Royal Institution of Naval Architects (RINA),
This document sets out how wind energy can be incorporated into the mid-term measures developed to implement the 2023 IMO Strategy on Reduction of GHG Emissions from Ships, with reference to the technical measures currently being prepared. It further proposes an amended formula based on the work presented in document ISWG-GHG 16/2/7 (Austria et al.), which is to date the most elaborated upon formula that could be used to calculate the attained Greenhouse Gas Fuel Intensity (GFI), and which provides a concrete illustration of the technical proposal so that wind energy is accounted for equitably in the greenhouse gas emissions intensity balance for the ship. Submitted to International Maritime Organisation (IMO) by IWSA
14 December 2021
The purpose of this guidance is to assist manufacturers, shipbuilders, shipowners, verifiers and other interested parties relating to Energy Efficiency Design Index (EEDI) and Energy Efficiency Existing Ship Index (EEXI) of ships to treat innovative energy efficiency technologies for calculation and verification of the attained EEDI, in accordance with regulations 5, 6, 7, 8, 9 and 20 of Annex VI to MARPOL. Although the term EEDI only is used through the whole guidance, it applies to both the EEDI and the EEXI calculations, as applicable.
