New Gitte Henning goes green

New Gitte Henning goes green A contract has been signed for a new Salt-designed Gitte Henning to be built at Zamakona. Illustration: Salt Ship Design

Ending speculation that he was about to leave the industry, Danish skipper and fishing vessel owner Henning Kjeldsen has placed an order for a new Gitte Henning.

This comes less than two years after the delivery of the last Gitte Henning in May 2018. Henning Kjeldsen has been at the centre of controversy in Denmark as the fleet of vessels under the company name has fluctuated in recent years.

In 2019 the latest Gitte Henning was sold to Varðin in the Faroe Islands, which needed a replacement for the laid-up Tróndur í Gøtu, fuelling speculation that Henning Kjeldsen was about to sell up and leave fishing for good. He confirmed that this had been on his mind, and there had been tempting offers for his pelagic fishing rights.

“Thinking about the future, I got cold feet at the prospect of doing nothing,” he said. “So I got in touch with Salt Ship Design.”

A contract has been signed for a new Gitte Henning, designed by Salt and this time the new vessel will be built at the Zamakona yard in Spain – and it incorporates a great deal of new thinking and environmentally-friendly systems, some of which have not previously been seen in the fishing sector.

This is the fourth time Henning Kjeldsen and the Sandvik family have collaborated on a new Gitte Henning, and this is the second Salt-designed pelagic vessel to carry the name.

The latest in this long series will measure 87.60 metres overall with a 20 metre beam, and the innovation starts with a pair of propellers powered by electric Permanent Magnet (PM) motors. According to Salt Ship Design, this type of motor has less electrical loss and can operate significantly more efficiently than conventional electric motors throughout the power range, particularly at low engine speeds, while low propeller rpm means better propeller efficiency at typical loading and no reduction gear means reduced noise and no mechanical loss.

Extensive flow analysis and model test results have shown that two propellers and a twin-skeg hull design offer greater efficiency that a single large propeller, with better towing capability and lower fuel consumption while trawling.

Twin propellers also enable steering with minimal rudder impact, reducing energy requirements during steaming and trawling.

Power generation is from a series of five Yanmar diesel generators, housed in two separate engine spaces, in a peak shaving arrangement designed to flatten the load variations on each engine. This is expected to result in fuel consumption reduced by approximately 10%, based on experience with other diesel-electric vessels.

The gensets are selected to optimise the power balance, based on Gitte Henning’s projected operational profile, and to provide each engine with optimum operating conditions conditions. All the generators are to be supplied with catalytic converter (SCR) to reduce emissions and meet new and stricter IMO Tier III requirements.

To further improve the operating conditions of the diesel engines, Henning Kjeldsen has invested in a large battery pack that support the generators when the load is high and recharges when the load is low. Regenerated power from the winches during trawling also helps to charge the battery pack.

The batteries are located in a separate space, providing an additional source of emergency power in addition to the diesel generators in the two engine rooms. In addition, they will significantly reduce noise and emissions in port.

The PM technology extends to the new Gitte Henning’s Evotec winch systems, which will be powered by permanent magnet technology, including capacity to recover energy expended when shooting away. The electric cranes and fish pumps are to be supplied by SeaQuest, and everything from winches to pumps on board will be frequency controlled, delivering a more customised power supply that allows energy consumption to be reduced overall.

The new ship’s RSW capacity is designed with a new approach that provides the inner surfaces of the tanks with an entirely smooth finish, and behind these lie four independent Johnson Controls cooling systems, each of which provide cooling capacity to four RSW tanks to provide an optimised, high-efficiency system. The C-Flow vacuum system has been boosted by 40% to provide greater discharging capacity.

The new Gitte Henning is to be built at the Astilleros Zamakona shipyard at Bilbao in Spain, a yard with a long track record of delivering large complex fishing vessels, including a series of tuna purse seiners built for Echebastar, and George Anderson’s Adenia, which was delivered earlier this year.

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