Performance prediction of full-scale ship and analysis by means of on-board monitoring. Part\xa02: Validation of full-scale performance predictions in actual seas

Hideo Orihara,Masaru Tsujimoto

doi:10.1007/s00773-017-0511-5

Hideo Orihara, Masaru Tsujimoto

Open Access

https://doi.org/10.1007/s00773-017-0511-5

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Abstract

In this paper, full-scale ship performance in actual seas, which was predicted by the method described in part 1 of the present study, was validated through a comparison with onboard monitored data. The full-scale performance of a large bulk carrier was monitored by a dedicated on-board monitoring system, and the monitored data were thoroughly analyzed and reduced to the form of performance parameters applicable to the comparison with the prediction results. The full-scale ship performance predictions evaluated in the form of shaft power increase agreed quite well with the analyzed monitored data obtained under actual operating conditions. Thus, the effectiveness of the performance prediction method presented in this study was fully confirmed.

Highlights

In order to reduce greenhouse gas emissions from ships, fuel saving by improving the hull form and the power plant systems has been strongly demanded
Part 1 of this study described a method for predicting ship performance in actual seas
It should be stressed that speed–power performance is affected significantly by encountered waves, and an accurate evaluation of their effect is indispensable for enhancing the accuracy of full-scale performance monitoring and analysis under varied weather conditions dissimilar from the Beaufort standard weather condition, such as wave environments with dominant swell effects

Summary

Introduction

In order to reduce greenhouse gas emissions from ships, fuel saving by improving the hull form and the power plant systems has been strongly demanded For this reason, confirmation of whether the ship performance is achieved as designed and reflection in new ship design have become more important. In this examination, the variations of the corrected shaft power are examined by changing a particular parameter (true wind speed and significant wave height) with the reaming parameters fixed.

Methods

Results

Conclusion