New US harbour tug features Berg Propulsion’s most advanced hybrid electric package to date

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A new harbour tug delivered by one of the leading workboat builders in the US features the fully integrated hybrid propulsion plant from Berg Propulsion. Already operational at Port Arthur following delivery by Master Boat Builders, the Robert Allan-designed RApport 3000 vessel is the first of two 90-ton bollard pull tugs using this latest Berg package, with the second due in service in Q3 2022.

In addition to Berg MTA 628 azimuthing thrusters, Berg VS3 variable frequency drives with motors, and its own hybrid control system, Berg’s design, supply, and integration includes the switchboard with full power management plus control of the tug’s twin Caterpillar 3512E EPA Tier 4 (2,550 hp) main engines and its gensets – two CAT C18’s and one C7.1.

Berg’s hybrid electric propulsion system includes high levels of redundancy for safety as well as the ability to switch seamlessly between operating modes with the push of a button. A vessel can run on main engines only, gensets only, or a combination of the two, optimizing energy use across the entire operating profile. A tug in transit can minimize energy consumption and eliminate main engine wear by running on a single generator set. In hybrid mode, power is balanced between the diesel engines and electrical motors to optimize fuel consumption, manoeuvring response, and bollard performance.

“During the first weeks in operation, Spartan has been living up to the promises made for hybrid propulsion vessels,” said Daniel Thorogood, President and CEO, Seabulk. “Seabulk’s commitment to improving the sustainability of its operations is represented by its investment in a new generation of vessels whose flexibility is proving that hybrid tug technology is our choice for the future.”

The solution, whose installation was managed at the yard by Berg’s distributor and partner in the area, Thompson Marine, is the most advanced hybrid electric package ever delivered by Berg Propulsion.