Session: 06-11-02 Ocean Engineering Technology - II

Submission Number: 180461

Analysis of Fouling and Aging Effect Using Monitoring Data Obtained From Pure Car Carrier 

In recent years, an increasing number of ships have been equipped with sensors that collect onboard monitoring data for the purpose of reduction of GHG (Greenhouse gas) emission and the improvement of fuel efficiency. The analysis of these data enables us to evaluate ship performance, study more energy-efficient hull designs and operational effects, and determine maintenance schedules like dry docking and propeller cleaning.

To maximize energy savings, it is important to evaluate lifetime fuel consumption through identifying and forecasting the fouling and aging effects. While there have been some studies that modeled the fouling and aging effects through the examination of added resistance and onboard monitoring data for about 2-3 years, few studies are conducted that validates the model using high-frequency and high-accuracy data in long-term over five years.

In this paper, Long-term onboard monitoring data from a car carrier is used to analyze performance changes over time based on the actual maintenance timing.

While various analysis methods for the onboard monitoring data have been proposed, including ISO 19030, this paper first models the relationship among ship speed, engine revolution and engine power using data from each voyage. By these relationships, the increase in engine power at the same ship speed and the same engine revolution and the reduction of ship speed at the same engine revolution and the same engine power for each voyage are obtained. These results are then compared with the actual operating conditions including sea area or paint. It is cleared that the fouling and aging effect is evaluated quantitatively by the proposed method.

Presenting Author: Akiko Sakurada National Maritime Research Institute

Presenting Author Biography: Akiko Sakurada graduated the University of Osaka and obtained the master’s degree of ocean engineering in 2014.
The author has engaged in the analysis of monitoring data, the analysis of the propulsion performance in actual seas and ship design from 2014 as the member of National Maritime Research Institute. The author's department is Fluid Engineering & Hull Design Development Performance of Ship in Actual Seas Research Group.

Authors:

Akiko Sakurada National Maritime Research Institute
Mariko Kuroda National Maritime Research Institute
Masaru Tsujimoto National Maritime Research Institute
Hiroyuki Sano Mitsui O.S.K. Lines, Ltd.
Tetsuro Ashida Mitsui O.S.K. Lines, Ltd.