DNV GL Building Service Targets Fuel Efficiency

MarineLink.com
Wednesday, March 19, 2014
SDARI Green Dolphin (Image: DNV GL)

DNV GL launched a new service named Build2Design to help shipyards and shipowners improve the fuel economy of their ships by reducing variations in their building process.

Significant improvements have been achieved in the design of more fuel-efficient ships in recent years. The performance of these Eco-Ship designs has been documented by both Computational Fluid Dynamics (CFD) and tank testing and some designs have also proven their performance in operation. However, questions have been raised about variations in performance and research has now shown a wide variation in different ships of the same design.

“We have compiled data that shows there is a large variation in fuel consumption between ships of the same design. This has led us to develop a new service, Build2Design, which aims at ensuring that the actual ship delivered is as good as its design,” said Michael Aasland, Business Director for Bulk Carriers at DNV GL.

Dr. Olav Rognebakke, Head of Hydrodynamics at DNV GL, added, “Build2Design is based on a solid theoretical foundation combined with the latest technology and uses advanced CFD calculations to identify the parameters that affect fuel consumption and the effect of each individual parameter.”

In developing the new service, DNV GL undertook a sensitivity analysis of over twenty parameters and considered both the complexity of addressing the parameter and the impact on fuel consumption of each parameter. The project’s results also show that the selection of the parameters will be design specific, since the flow around the ship hull varies from design to design.

“We have taken a cost/benefit approach when selecting the parameters so that the shipowner obtains the maximum benefit with the minimum impact on the shipyard,” said Aasland. “Just one of the parameters we are considering is the positioning and alignment of the bilge keel. Advanced CFD calculations show that a 0.5% reduction in resistance can be achieved by adjusting the position and angle,” he added.

From the first pilot project carried out on the Green Dolphin 38 design, a conservative estimate shows that a saving of 2% can be achieved, which equates to 80 metric tons of fuel/year and a saving of USD 50,000/year. Corresponding figures for a typical Capesize bulk carrier are 200 metric tons of fuel/year and a saving of $120,000/year.

The new service is being rolled out this spring, both through the Green Dolphin 38 pilot project for Goldenport at CSI Jiangsu and the first commercial project based on a Seahorse 35 design for Graig Shipping at Jiangdong SY.

“Today, hull lines are optimized with much greater sophistication than only a few years ago,” Aasland said. “DNV GL’s Build2Design service ensures that both yards and shipowners benefit from the latest research and best practices.”

dnvgl.com

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

Environmental

Ecochlor BWTS Chosen for 8 New Bulkers

Times Navigation, Inc. has selected Ecochlor, Inc. to provide ballast water treatment systems (BWTS) for installation on a fleet of eight new CROWN63 (63,500 DWT)

Signal Ship Repair Achieves OSHA Milestone

Signal International announced that on December 31, 2014, the Signal Ship Repair Operations located in Mobile, Alabama achieved one full year and worked 387,926 manhours,

International Sulphur Campaign Launched

An international information campaign on the new, stricter sulphur requirements and their enforcement will be launched in February and, at the same time, cooperation

Naval Architecture

The Art of Propeller Making

The world’s biggest propellers have their cradle in the North of Germany. MMG – Mecklenburger Metallguss GmbH – has manufactured for more than 65 years propellers for ships,

DSME Building 5 Icebreaking LNGCs for Yamal

Korean shipbuilder Daewoo Shipbuilding & Marine Engineering (DSME) is building five large Arctic Liquefied Natural Gas Carriers (LNGCs), for which it has LNG ordered

GTT to Exhibit at Euromaritime

Gaztransport & Technigaz (GTT), a designer of membrane containment systems for the maritime transportation and storage of liquefied natural gas (LNG), will exhibit at Euromaritime,

News

Shepler’s New Ferry Takes Shape

Sparks are flying on the bulkhead and engine room of the $3.8 million, 85-foot Miss Margy, the newest addition to the Shepler’s Mackinac Island Ferry fleet, at Moran Iron Works.

LEEVAC Launches First PSV for Tidewater

On Tuesday, January 27, LEEVAC Shipyards Jennings, LLC launched hull 367, a platform supply vessel (PSV) designed by LEEVAC Design Services, LLC (300 DE-52 HAB PSV).

Puget Sound Container Volumes Flat in 2014

Container volumes through Puget Sound’s largest container ports remained flat in 2014, according to numbers released jointly for the first time by the ports of Seattle and Tacoma.

Classification Societies

ClassNK Releases Improved "e-Application"

ClassNK announced the release of an improved "e-Application" system. This improvement was planned based on requests from the users. Therefore, firstly we would

‘Landmark Year’ for RS in 2014

For Russian Maritime Register of Shipping (RS), 2014 marked the 101st year of its activities. The classification society said 2014 also marked a landmark year,

Secure VGP Compliance with New Verification Service

Recent updates to the US Vessel General Permit (VGP) have brought new technical and reporting requirements for vessels operating in US waters, including the need

Consulting

AAL Launches New Operation in Japan

AAL has announced the launch of a new operation in Japan AAL said the move aims to provide services and on-ground operational support directly to customers in the country,

ClassNK Releases Improved "e-Application"

ClassNK announced the release of an improved "e-Application" system. This improvement was planned based on requests from the users. Therefore, firstly we would

Launch of Asian Marine Casualty Forum

The Crisis in Global Maritime Casualty Response – Now Is the Time To Act – An industry Forum Designed to Promote Change An industry forum aimed at producing

 
 
Maritime Contracts Maritime Security Maritime Standards Navigation Port Authority Salvage Ship Electronics Ship Repair Ship Simulators Sonar
rss | archive | history | articles | privacy | terms and conditions | 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: 0.2593 sec (4 req/sec)