碩士 / 國立臺灣海洋大學 / 輪機工程學系 / 104 / Fuel cost accounts is the major item in ship operating expenditure, increase in fuel oil consumption may be caused by increase in hull resistance or degraded marine diesel engine performance, marine engineers must distinguish them effectively from all abnormal symptoms, so as to take proper actions to restore ship efficiency and reduce fuel cost. In this thesis, the predictive model is obtained by statistical method and regression analysis, the model curve data which consists of main diesel engine shop trial data or speed-power data derived on towing tank test is used to find deviation between service data and model baseline. A linear regression model with implanted deviations is used to predict performance degradation over time in order to find root cause of degraded performance and effectively recommend for further correction. Analysis method as proposed in this thesis has applied to a real ship for verification, results shows that about 71% power higher than a reference line for a constant 13 knots ship speed during a period of about 3.5 years. On analyzing performance parameters of main diesel engine, increase in torque-rich index is the main cause for increased exhaust temperature.
| Identifer | oai:union.ndltd.org:TW/104NTOU5484018 |
| Date | January 2016 |
| Creators | Shaiu, Yinq-Long, 蕭應龍 |
| Contributors | Hwang, Daw-Shang, 黃道祥 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 97 |
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