Rolls-Royce LNG Environship Delivered to Eidsvaag

MarineLink.com
Friday, May 31, 2013

LNG as marine fuel takes another step forward as Eidsvaag AS took delivery of the first vessel of the Rolls-Royce prize winning Environship range this week, featuring a combination of Rolls-Royce design and technologies which reduce CO2 emissions by up to 40 percent compared to similar diesel powered vessels.


Once in operation the vessel will operate a demanding schedule with a weekly round voyage along the Norwegian coast delivering feed pellets to fish farms regardless of weather conditions. On arrival at the storage location at a fish farm the ship will hold its position using its DP system and the pellets will be delivered by means of a crane operated transfer system over the bow. Up to 1,450 tons of feed can be carried in the 62 specially designed tanks on board which are connected to the unloading system, and the speed needed to meet the weekly schedule is 15 knots.


The ship is designed with focus on the actual sea conditions experienced in the area in which it will operate. Extensive model testing was carried out in the towing tank and the ocean basin at Marintek. Testing has confirmed that the hull is extremely efficient in both calm waters and heavy seas. A patented bow form reduces hull resistance in waves by up to 10 percent compared with an optimised conventional bow. This is confirmed by careful benchmarking comparisons in head seas in the towing tank.


On an overall length of 74.7 metres the NVC 401 LNG has a beam of 13.6 metres and a loaded draught of about 5 metres. The superstructure is located forward, with accommodation for eight people, and the machinery and LNG tank aft, the cargo tanks occupying the main part of the hull.


A Bergen C26:33L9PG gas engine, developing 2,430kW at 1,000rpm turns a CP propeller in a Promas solution integrating the propeller, a nozzle and the rudder in an efficient propulsion system.


The reduction gearbox handles power take-off and take-in for the 1,100kW shaft generator in a variable speed HSG (Hybrid Shaft Generator) configuration linked to the two 469kW auxiliary gensets. The HSG makes the vessel energy optimal in operation. This generator continues to supply electricity of correct voltage and frequency even at reduced revolutions of the engine and propeller. This means that the propulsion system can run on combinatory control, varying propeller rpm as well as pitch instead of the fixed revolutions required by other shaft generators. The propeller speed can therefore be that needed for best efficiency at the chosen ship speed. By this means the energy usually wasted by turning the propeller faster than is actually needed can be saved.


The high lift rudder is complemented by a 540kW tunnel bow thruster and a similar unit in the stern skeg.


The LNG system supplied by Rolls-Royce has a capacity of about 110 cubic meters which gives a range of around 1750 nautical miles. Developed in cooperation with Linde Cryo, the result is a system that controls the supply of gas to the engine optimally despite rapid changes in load. Furthermore Rolls-Royce has delivered the engine and thruster controls, an integrated automation system with gas control and monitoring, the DP1 system with joystick, and the electrical system.
All together the propulsion solution will reduce CO2  emissions by 22 percent, NOx emissons by 92 percent and SOx emissions by 99 percent, while emission of particulates are negligible.
Built at the Vard Aukra yard in Norway and owned by Eidsvaag AS, the NVC 401 LNG forage carrier will work for Skretting AS.


Several Environship vessels under construction
The Environship concept can be adapted for different ship types and a number of Environship vessels already in build will take to the seas during 2013. In the last quarter of the year the first of two cargo ships for the Norwegian Company Nor Lines will be delivered by the Tsuji Heavy Industries (Jiangsu) Co. Ltd yard in China. Passenger ship designs are also under development. Last year Rolls-Royce signed a teaming agreement with Italian company Lauro Shipping to design innovative new gas powered ferries based on the Environship concept.


Earlier this year, Rolls-Royce received the Green Ship Technology Award for its Environship concept, and in 2011 it received the Next Generation Ship Award at the Nor-Shipping exhibition. It is also nominated to this year’s “Ship of The Year” award at Nor-Shipping.

 

Maritime Reporter April 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

People & Company News

Matson Completes Horizon Lines Acquisition

Matson, Inc. has completed the acquisition of Horizon Lines, Inc. which includes Horizon's Alaska operations and the assumption of all non-Hawaii business liabilities.

Wärtsilä Acquires L-3 MSI

Wärtsilä completes acquisition of L-3 Marine Systems International    Wärtsilä Corporation announced that its acquisition of the Germany based L-3 Marine Systems

BWTS Newcomer Sees Early Success

Norwegian manufacturer of ballast water treatment systems MMC Green Technology reports it has sold more than 70 systems since going commercial with its MMC BWMS two years ago,

Technology

Kongsberg Contracted to Support FLNG Conversion

Kongsberg Maritime secures position in the LNG market with electrical and automation contract for Golar Hilli FLNG   Keppel Shipyard in Singapore and Black & Veatch in the U.

New Power Optimization Solution for LNG Carriers

NAPA and DSME launch tailored NAPA-DSME Power Solution for LNG carriers; leading LNG carrier shipyard offers specialized performance monitoring solution   South Korean shipbuilder,

Design & Operation: Wind Farm Support Vessels

Offshore wind farm development has been led globally by the UK, followed by Germany. Both countries have governments with long term commitments to renewable energy.

Marine Power

New Power Optimization Solution for LNG Carriers

NAPA and DSME launch tailored NAPA-DSME Power Solution for LNG carriers; leading LNG carrier shipyard offers specialized performance monitoring solution   South Korean shipbuilder,

New Ship Continues Atlantic Offshore's Fleet Modernization

Atlantic Offshore Rescue will unveil the third new vessel in the past 12 months as part of its fleet modernization program, representing an investment totaling $458 million.

Iran, Oman Sign Maritime Agreement

Iran's Mehr news agency said that Iranian Foreign Minister Javad Zarif and Omani Foreign Minister Yusuf bin Alawi have announced that the two countries have agreed

News

Unicom Selects the Ecochlor BWTS for 10 Tankers

Ecochlor, Inc. announced that Unicom Management Services (Cyprus) Ltd. (Unicom), acting for SCF Group, signed a 10-vessel agreement for the Ecochlor Ballast Water Treatment System (BWTS) in Limassol,

Wage Row Between Argentine Crushers, Companies Reaches Crunch Point

Pressure grew on Friday for a resolution to wage talks between exporters and striking crushers in Argentina's Rosario grains hub, with another powerful union threatening

Kongsberg Contracted to Support FLNG Conversion

Kongsberg Maritime secures position in the LNG market with electrical and automation contract for Golar Hilli FLNG   Keppel Shipyard in Singapore and Black & Veatch in the U.

Vessels

Unicom Selects the Ecochlor BWTS for 10 Tankers

Ecochlor, Inc. announced that Unicom Management Services (Cyprus) Ltd. (Unicom), acting for SCF Group, signed a 10-vessel agreement for the Ecochlor Ballast Water Treatment System (BWTS) in Limassol,

Crowley to Manage 4 Jones Act Ships for Pasha

Crowley Maritime Corp.’s ship management group has been awarded a new contract with Sunrise Operations LLC, a subsidiary of The Pasha Group, of San Rafael, Calif.

New Power Optimization Solution for LNG Carriers

NAPA and DSME launch tailored NAPA-DSME Power Solution for LNG carriers; leading LNG carrier shipyard offers specialized performance monitoring solution   South Korean shipbuilder,

 
 
Maritime Careers / Shipboard Positions Maritime Security Maritime Standards Naval Architecture Navigation Offshore Oil Port Authority Ship Electronics Shipbuilding / Vessel Construction Winch
rss | archive | history | articles | privacy | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.2503 sec (4 req/sec)