Bookmark and Share Email this page Email Print this page Print

Baydelta orders hybrid tug from Nichols Brothers

Jan 29, 2018 11:13 AM

The Jensen-designed boat will utilize direct diesel, diesel-electric or fully electric propulsion

The following is a news release from Jensen Maritime:

(SEATTLE) — ­Jensen Maritime, Crowley Maritime Corp.’s Seattle-based naval architecture and marine engineering firm, was recently selected to provide the design for Baydelta Maritime’s new 100-foot z-drive hybrid tugboat. It will use Rolls-Royce hybrid technology and represents the first installation of a hybrid system for Nichols Brothers Boat Builders (NBBB), and the first hybrid tug designed by Jensen to enter the construction phase.

Scheduled for delivery in the first quarter of 2019, the tug will feature the same ship assist and tanker escort capabilities of existing Valor-class harbor tugs, but with multiple operational modes. The Rolls-Royce hybrid system allows for the vessel to operate direct diesel, diesel-electric or fully electric while assisting the large containerships and tankers that operate in U.S. West Coast ports. This concept will save fuel and reduce emissions, while supplying Baydelta with the same power and vessel characteristics needed for their operations. The flexibility provided by the drive system will allow loitering and transit at up to 7 to 8 knots in electric-only mode, then a bollard pull of 90, or 9 short tons, in combined diesel-electric mode. 

The tug will be powered by two Caterpillar C3516 C Tier 3 diesel engines, each rated at 1,995 kW at 1,600 rpm, supplied by Peterson Power of Portland, Ore.; and by two Rolls-Royce supplied 424-kW electric motors. The z-drive system, two Rolls-Royce 255FP units, can accept power from the diesel engines, electric motors and from both power sources. The electric motors are powered by three Cat C9.3 generators with 300 kW each, which are 480-V three-phase at 1,800 rpm, and one harbor generator, a C7.1 150-kW, 480-V three-phase at 1,800 rpm. All four generators will be supplied by Peterson Power.

The tug will have eight berths, and the major equipment on board will include a Rapp Marine electric hawser winch and a single drum tow winch. The tug is designed to carry up to 71,000 gallons of fuel and 4,300 gallons of fresh water. It will have a large pilothouse providing all-around visibility; a deckhouse with an open feel; a large mess and lounge area; and accommodations for an eight-person crew.  

The tugboat will be ABS Load Line classed and compliant with U.S. Coast Guard regulations, as required at delivery.

Add your comment:
Edit Module