DECEMBER 3, 2018 — St. John’s, Newfoundland, based Ocean Choice International has ordered a state of the art 74 m x 16 m Arctic class freezer trawler.
Designed by Norway’s Skipsteknisk, it will be built by Turkey’s Tersan Shipyard with a scheduled delivery in December 2019.
Ocean Choice says the trawler is designed to provide its workers at sea the safest possible marine working environment, particularly during the harsher months of the year and that the advanced technologies onboard will maximize yield, while minimizing processing time.
Given the trawler’s size and freezing capacity, electrical generation was an important design consideration
In addition to a 6,528-hp MAN main engine, the vessel will have a Cummins QSK 60-powered generator with an output of 2,155 kVA/ 1,724 kWe, 3 x 440 V AC, 3 phase, 60 Hz. An additional Cummins QSK19-powered generator will have an output of 700 kVA / 560 kWe, 3 x 440 VAC, 3 phase, 60 Hz.
These will meet the extensive electrical needs of the vessel’s 39-crew accommodation block, extensive navigation suite, and processing factory. Most importantly the large freezer capacity will have a significant electrical demand.
The vessel will have Ibercisa electric trawl winches. Though these are significant electrical consumers when the catch is being hauled in, when the net is being payed out, the force of the turning winch generate electricity.
“By the use of active front end (AFE) technology, we are able to utilize regenerative power from the winches when paying out the trawl gear,” says Inge Bertil Straume of Skipsteknisk.. “Thus the winches work as a ‘power plant.’
“This free power will normally be utilized through the other major consumers on-board, like fish-factory, freezing machinery and the hotel load. In the case of low demand on-board, this free power will be allocated tothe propeller through the gearbox shaft alternator/motor in PTI mode.”