Evaluation of Occurrence Probability of Winds for Use of Wind Propulsion System in Calculating Attained Energy Efficiency Design Index

• Published in: Transactions of Navigation Vol. 6; no. 2; pp. 77 - 84
• Main Authors: KANEKO, Azumi, TSUJIMOTO, Masaru
• Format: Journal Article
• Language: Japanese
• Published: Japan Institute of Navigation 2021
• Subjects: Energy Efficiency Design Index; Global Wind Probability Matrix; Guidance on Treatment of Innovative Energy Efficiency Technologies; Long-term statistics
• ISSN: 2189-5511
• DOI: 10.18949/jintransnavi.6.2_77

When using wind propulsion systems under the Energy Efficiency Design Index (EEDI) regulations, users are required to apply the global wind probability matrix and appropriately reflect the effect of the wind propulsion system. In this paper, global winds and waves statistics of multiple sea areas (GLOBUS) is used to evaluate the joint probability density function of wind speed and wind angle as exemplified by the International Maritime Organization (IMO). As a result of this evaluation, it was found that the IMO wind speed distribution was almost the same as that in GLOBUS, but a lack of wind data was observed in the exemplified data. In addition, there are also characteristic tendencies in the occurrence of the wind speed and wind angle for each route, and it is necessary to examine appropriate treatment of the probability of wind angles.