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Wärtsilä introduced energy saving EnergoProFin propeller

Wärtsilä, the Finnish engineering group, has introduced Wärtsilä EnergoProFin is a state-of-the-art energy saving solution that increases propeller efficiency and creates fuel savings of up to 5%, the company said in a statement.

The solution is now available for both controllable pitch propellers (CPP) as well as fixed pitch propellers (FPP), yielding the same results in both propeller options. Offering the solution for technologically more challenging CPPs was previously considered impossible in the industry, but is now made possible due to development work by the Wärtsilä hydrodynamics team.

The Wärtsilä EnergoProFin is a specially designed propeller cap with hydrofoil section fins on the downstream side of the propeller. It is an innovative energy saving device that can significantly reduce a vessel's fuel consumption as well as its emission levels. Such technical innovations play a major role for ship operators who are tackling rising operating costs, as it offers an opportunity to enhance the efficiency of existing assets. By improving their energy efficiency, ship operators can increase their profitability in an environmentally sound way.

Propeller caps with fins have existed for three decades, but their application has so far been primarily on FPPs. The view of the industry has been that applying an energy saving device such as Wärtsilä EnergoProFin to the technologically more challenging CPP would not be possible. Wärtsilä took on the development task and succeeded in creating a product that offers vessels equipped with a CPP an opportunity to reduce their energy consumption. Wärtsilä's development work was a spin-off of an EU-funded collaborative project between Wärtsilä and nine other companies.

Energy savings impact operating costs and environmental compliance

The Wärtsilä EnergoProFin, which rotates with the propeller, is optimised for propulsion upgrades of existing vessels and as such can be easily mounted without the need for complex structural changes. The device is designed to minimise the losses in the vortex leaving the propeller by transforming rotational energy into effective thrust, resulting in an efficiency increase that brings up to five percent fuel savings. The payback time for the investment is, even with the current low fuel prices, generally less than two years and can be as short as less than a year.

"Customers in today's uncertain economic situation need solutions that are reliable, cost-effective and easy to invest in. Energy efficiency solutions in general are a sound investment, as their impact on both operating costs and environmental compliance is a lasting one," says Tamara de Gruyter, Vice President, Propulsion System Services, Wärtsilä Services. "We want to help ship operators optimise their existing assets, and that is exactly what Wärtsilä EnergoProFin does, now for controlled pitch propellers as well."

GNV values energy efficiency

Customers have welcomed the opportunity to improve their efficiency. Grandi Navi Veloci S.p.A. (GNV), which operates 10 international routes to and from Spain, France, Albania, Tunisia, Morocco and Malta, and five national lines within Italy, is constantly investing in the energy optimisation of its fleet. The commitment of the company to rapidly adapt its product and service, attention to market signals and the continuous technological evolution of its fleet have allowed GNV to renew and strengthen its business, consolidating domestic routes and increasing its presence in the international markets.

"The strength of our company is the extreme and constant attention to the energy efficiency of our fleet," says Antonio Campagnuolo, Marine Operations Director of GNV. "We wanted to reblade two units of our fleet. After Wärtsilä further presented the EnergoProFin to us and once we analysed its performance and the resulting energy efficiency improvements, we decided to go ahead with the reblading and have the EnergoProFin solution installed in both our

Windstar Cruises’ Star Pride receives Trimline refurbishment

In a major interior renovation, Trimline upgraded Windstar Cruises’ all-suite yacht Star Pride in good time for the 2016 summer cruise season. In June, the 212-guest ship underwent a $4.5 million transformation in Athens, Greece, including the revitalisation of two owner’s suites and refurbishment of public spaces.

Star Pride is the latest Trimline refurbishment for Windstar Cruises, joining Star Breeze and Star Legend which were refurbished by Trimline last year, with matching accommodation and features. Windstar and Trimline have partnered for the renovation of all six ships in Windstar’s fleet.

In completing the refurbishment, Trimline was able to draw on over 50 years’ experience in planning and executing similar projects on a wide range of marine vessels for the cruise sector. The team used their wealth of experience to invent innovative solutions in terms of materials used, details added and the best use of space.

Trimline’s Star Pride project included the following updates:

– Owners’ Suites. The highlight of the refurbishment, the suites were given a new layout, deckheads, flooring, bespoke fixed furniture and bathrooms were revitalised.
– Amphora Restaurant. New decoration with new flooring, fixed furniture, mirrors, lights, curtains, sheers and loose chairs added as well as modification to existing waiter stations.
– Reception. Bench seating was reupholstered and new lights and artwork were added.
– Show lounge. New flooring was installed, existing banquette seating were reupholstered, along with decoration, minor joinery works, new table lamps and new loose furniture.
– Veranda. Entire space was decorated, with tile flooring, deckheads and cold servery installed and coffee machines relocated.
– Courtyard dining area. New stainless steel screens, new waiter station, banquette seating with artificial living wall added, as well as new fixed tables and loose chairs.
– Star screening room. Two rooms were converted into a new cinema. New bulkheads, deckheads, flooring, decoration, lights and bespoke joinery items were added.

Michael Oliver, Trimline’s Co Chairman remarked, “Trimline was very pleased to work with Windstar on this significant refurbishment and in particular on the Owners Suites where the outcome on this technical project was of the highest quality and fits well within the Windstar brand.”

“Trimline was chosen as Windstar’s main sub-contractor for the Pride Phase II refit as we know we can count on them to complete any project on time, within budget & on schedule. All areas refurbished look beautiful but in particular the two new owner’s suites are stunning & Trimline’s finish work was key to making this project a success.” said Theresa Rasmussen, Interior Superintendent with Windstar Cruises

Scandlines' new hybrid ferry uses Corvus Energy Lithium Ion Energy Storage System (ESS)

Scandlines has named their newest hybrid ferry, the Copenhagen. As part of Scandlines’ ambitious environmental strategy, the new hybrid ferry will join the world’s largest fleet of hybrid ferries, utilizing a low emission and fuel saving diesel electric hybrid propulsion system powered by a Corvus Energy ESS (Energy Storage System). The Copenhagen is the sixth Scandlines hybrid ferry to utilize a Corvus ESS.

This new hybrid ferry will soon join its sister ship Berlin, also powered by a Corvus ESS, in servicing the crossing between Rostock, Germany and Gedser, Denmark. The Copenhagen is 169.5m long and 25.4m wide, providing double the capacity for vehicles (460 cars or 96 transport trucks), and the modern, spacious onboard facilities have enough space for 1,300 passengers. The main engines provide an output of 18,000kW, with a further 4,500kW available from the Corvus ESS. This results in a speed of 21 knots on the 1-hour 45 minutes long crossing.

Scandlines has gone to great lengths to ensure the Copenhagen is environmentally friendly by utilizing technologies that increase fuel savings, significantly reduce emissions and greatly improve on-board energy efficiency. It uses an optimized propulsion system consisting of propellers and two thrusters, which can be rotated through 360 degrees and are used in narrow waterways or during maneuvers in port. On the emissions front, the Copenhagen has four scrubbers which remove harmful substances from the exhaust gases such as sulphur oxides and fine particles.

Energy-saving solutions are utilized wherever possible to reduce the amount of energy required to run the vessel, including LED lighting throughout and the use of variable-frequency controls to optimize energy usage. When consumption is lower, excess energy is stored in the Corvus ESS. This energy is then released when consumption is higher than generator production.

Wärtsilä enter dry waste handling on cruise ships, Saga Cruises first customer

Wärtsilä Corporation, the Finnish engineering group, said it has recently developed a complete offering for handling dry waste in cruise ships, with Saga Cruises as the first customer.

This new offering complements the company's extensive portfolio for handling wet waste, thus providing a total waste management offering. Waste treatment is a key element of the global shipping industry's focus on sustainability, and is an important part of Wärtsilä's environmental strategy.

The new total offering for both 'black' and 'grey' water waste, as well as disposing of dry and food waste has been ordered for one new vessel to be built by the Meyer Werft shipyard for British cruise operator Saga Cruises. The order for the Wärtsilä equipment was placed in September, with an option for a second vessel.

The overall 'full treatment' solution will provide the vessels with an environmentally clean, safe, and energy efficient means of handling their effluent and garbage. The Wärtsilä equipment utilises new membrane technology that is particularly energy efficient, with energy savings of up to 50% over conventional membrane systems, the company said in a statement.

"Wärtsilä offers a complete range of environmental solutions that meet both current and anticipated maritime regulations. Our waste treatment systems are state-of-the-art in terms of both technology and energy efficiency. Saga Cruises and Meyer Werft are both important customers, and we have tailored the solution for these ships to meet their specific needs and requests," says Kevin Robertson, General Manager, Water Systems Wärtsilä Marine Solutions.

"We have a good relationship with Wärtsilä and are very familiar with the high quality of their solutions and the excellent level of support we can expect from them. Having a single supplier for the complete handling of all waste, both wet and dry, means fewer interface challenges which adds value to the project," says Bernd Wiltfang, Meyer Werft.

Each vessel will be fitted with Wärtsilä's Advanced Wastewater Treatment system, including grease traps, buffer tanks, and membrane bioreactors; Wärtsilä's Dry Waste Disposal system, including densifiers, glass crushers, bale compactors and storage; Wärtsilä's Food Waste Vacuum system, including feeding stations, shredders, collection tanks, vacuum stations, decanters with flocculation, and food waste chutes; Wärtsilä's Bio-Sludge Treatment system, including a de-watered bio waste silo, decanters with flocculation, a dryer, and a dried bio-sludge silo; and Wärtsilä's Dry Garbage system, including shredders, a dry waste silo, and incinerator.

When completed, the 236 metre long vessels will offer capacity of 999 passengers. They will sail in some of the world's most environmentally protected sea areas, including the Baltic Sea and Alaskan waters.

The Wärtsilä Advanced Wastewater Treatment system is in full compliance with IMO Resolution MEPC 227 (64) including ch 4.2 nutrient removal (Helcom), MARPOL annex IV Reg. 9.2 and 11.B, the Alaska Murkowski Standard (USCG / Alaska continuous discharge standard and Alaska General Permit, and the USA EPA VGP 2013

WE Tech to deliver shaft generator solutions to Stena’s new highly fuel efficient ROPAX ferries

WE Tech, the Finnish engineering group, has received a significant order to deliver its energy efficient permanent magnet shaft generator solutions to a series of four ROPAX ferries, with an option for another four. The vessels are to be built for the Swedish shipping company Stena RoRo at AVIC Weihai Shipyard Co., Ltd. in China. The four initial vessels will be operated by Stena Line within its route network in Northern Europe.

“WE have developed the most energy efficient shaft generator solution to reduce the fuel consumption, operational costs and environmental footprint. Cooperation with one of the pioneers in shipping – Stena RoRo is a very significant step for us”, says Mr Martin Andtfolk, Sales Manager of WE Tech. “These ships will be the most fuel-efficient ferries in the world and will set a new industry standard when it comes to operational performance, emissions and cost competitiveness, positioning Stena Line to support its customers in the next decades”, says Mr Carl-Johan Hagman, Head of Shipping, Stena AB.

“With our solution the shaft generator, driven by the main engine, can produce all the needed electricity on-board without using any fuel to run the auxiliary generators when sailing. Our solution is also based on frequency drive technology which allows the main engine to run at variable speed while producing electricity on-board. This results in tons of fuel savings every day”, says Mr Andtfolk. The two 2600 kW shaft generators, together with variable frequency drive – WE DriveTM, generate power for the ship’s electrical network in power take out (PTO) mode. The solution also utilises the common DC-link for power distribution in bow thrusters.

”With our proven technology, we take our customers to success in terms of energy efficiency, fuel consumption and green values”, said Mårten Storbacka, Managing Director of WE Tech. The equipment delivery from WE Tech to the first vessel is scheduled in January 2018.


CBR 1/2016 contents

CBR 3/2015 contents