Page 28: of Marine News Magazine (March 2018)
Pushboats, Tugs & Assist Vessels
COLUMN SPECIAL REPORT
D E E SIESEL LECTRIC WITH NERGY TORAGE
When diesel electric systems are combined with energy storage, the bene? ts of diesel electric systems continue to improve. For typical marine application, the use of Lith- ium Ion batteries (Li-ion) can help add spinning reserve, peak shaving, and zero emission operations to increase the overall ef? ciency of the vessels.
OW IESEL LECTRIC ITS INTO THE NLAND ARKET
H D E F I M
To date, most of the focus on diesel electric has bypassed the inland towboat market. However, TSGI has been work- ing with engineers from ABB to develop and ? ne tune the diesel electric towboat design concept. The impetus for this design effort is the typical towboat’s operational pro? le.
When we asked owners how they operate their vessels, most believe they are between 80%-100% load nearly 100% of the time. In reality, we found that actual engine data from vessels operating on the rivers was quite different.
Instead of operating at over 80% loads the majority of the time (as previously thought), we found that the operational pro? le of the vessels we investigated spent far less time above 80% load than originally thought. For a number of opera- tors on various parts of the inland rivers, the actual towboat spends most of the time below 50% total power, with short peaks above 80%. This invites opportunity for diesel electric to provide positive impacts on the operational costs associ- ated with running a towboat on the inland rivers.
Vessel operation pro? les are very important in determining the suitability of a diesel electric system for a particular vessel.
Both sample pro? les represent real operational data over the course of 365 days of operation for different vessels.
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