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

Environmental

Thordon Bearings Secures AK Ferry Contract

Thordon Bearings has received an order to supply its COMPAC system to two Alaska Ferry newbuilds under construction at the Vigor Industrial shipyard in Ketchikan, Alaska.

Cruise Industry Wins Key Norovirus Judgment

In what is being seen as a landmark decision, Hill Dickinson is the first law firm to have successfully defended a UK class action case involving a Norovirus outbreak onboard a cruise liner.

Shell Moves Ahead in Arctic with Exploratory Well

Shell Oil's icebreaker MSV Fennica weaved through nine remaining protesters hanging from the St. Johns Bridge and made its way toward the Pacific Ocean.   Authorities

Fuels & Lubes

Thordon Bearings Secures AK Ferry Contract

Thordon Bearings has received an order to supply its COMPAC system to two Alaska Ferry newbuilds under construction at the Vigor Industrial shipyard in Ketchikan, Alaska.

West Africa's August Crude Exports to Asia to Slip

West African crude oil exports to Asia were expected to fall to 1.84 million barrels per day (bpd) in August, Reuters data and a survey of traders showed.     Slower

ClassNK Releases Guidelines for CNG Carriers

Classification society ClassNK has released its Guidelines for Compressed Natural Gas (CNG) Carriers.   Global economic and population growth is bringing about

News

West Africa's August Crude Exports to Asia to Slip

West African crude oil exports to Asia were expected to fall to 1.84 million barrels per day (bpd) in August, Reuters data and a survey of traders showed.     Slower

DHS, Postal Service to Dedicate USCG Forever Stamp

U.S. Department of Homeland Security (DHS) and Postal Service leaders are scheduled to dedicate the United States Coast Guard Forever stamp during a ceremony Tuesday at Coast Guard Headquarters.

DryShips Reaches Agreement with Ocean Rig

DryShips Inc. (NASDAQ: DRYS), a global provider of marine transportation services for drybulk and petroleum cargoes, and through its subsidiary, Ocean Rig UDW Inc.

Classification Societies

ClassNK Releases Guidelines for CNG Carriers

Classification society ClassNK has released its Guidelines for Compressed Natural Gas (CNG) Carriers.   Global economic and population growth is bringing about

INTERSCHALT VDR Earns CCS Certification

INTERSCHALT maritime systems AG, the provider of maritime software, services and systems for navigation and communications systems (NavCom) and manufacturer of Voyage Data Recorder (VDR) systems,

ABS Grants AIP for Jensen’s LNG ATB Design

A Jensen Maritime-designed, liquefied natural gas (LNG)-bunkering articulated tug-barge (ATB) has been granted approval in principle (AIP) by classification society American Bureau of Shipping (ABS).

Consulting

Rolls-Royce Takes Davies on Board

Rolls-Royce appointed Alan Davies as a Non-Executive Director. He will join the Board with effect from November 1, 2015 and will become a member of the Nominations and Governance Committee,

MARAD Support for Hydrogen Fuel Cell R&D

The U.S. Department of Transportation’s Maritime Administration (MARAD) today announced that it is providing $500,000 to support a feasibility study for the design,

NewLead Holdings Announces Commercial Competency of MT Sofia

NewLead Holdings Ltd.announced today a review of the commercial competency of one of its bitumen tanker vessels, the MT Sofia since the vessel was delivered to NewLead's fleet.

 
 
Maritime Careers / Shipboard Positions Maritime Security Maritime Standards Naval Architecture Pod Propulsion Port Authority Salvage Ship Electronics Ship Repair Shipbuilding / Vessel Construction
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: 0.1795 sec (6 req/sec)