Page 45: of Marine News Magazine (May 2019)

Inland Waterways

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INLAND PROPULSION

Diesel Electric with Energy Storage

HYBRID WITH ENERGY STORAGE

Hybrid with Energy Storage (H/ES) systems make use of a mechanically driven shaft line with a power take off and power take in (PTO/PTI) connected to a motor/gen- erator (M/G) set. The M/G set can take power from the ships electrical system and/or energy storage to provide additional power to the propeller shaft. This system is similar to those in modern hybrid cars. A hybrid system such as this can be especially attractive as a retro? t option for existing vessels.

LIFE CYCLE COST ANALYSIS

Energy Storage systems should not be considered a one-size-? ts-all solution. As with diesel electric propul- sion systems, a careful study of a towboat’s operational pro? le should be conducted to determine the operational bene? ts. Below is a real operational pro? le used for this case study. This particular vessel is an 1800HP locking river towboat.

Hybrid with Energy Storage www.marinelink.com