DNV GL Introduces Energy Efficiency Methodology

Posted by Michelle Howard
Wednesday, April 09, 2014
Photo courtesy of DNV GL

DNV GL presents a novel approach that overcomes challenges of assessing on board energy efficiency in a consistent manner. As a result, priorities for improvement can be determined accurately. In a new report released, DNV GL answers the question: How can a ship manager identify the biggest sources of useful energy that are currently being wasted on their ships?


“Ship operations and environmental legislation have become more complex, and it has become increasingly difficult to assess or even define efficiency with consistency and accuracy,” said Rune Torhaug, Director, Strategic Research & Innovation, DNV GL. “We have therefore revisited the basic and universal laws of thermodynamics to develop a methodology based on exergy, sometimes called available energy, which is a metric for describing the maximum useful energy that can be derived from a process, component or system.”


The methodology can be adjusted to suit newbuilds still in the design phase or operating ships, and it is designed to help managers make the most out of their Ship Energy Efficiency Management Plans. Using both on board measurements and the DNV GL modelling suite COSSMOS, energy losses throughout the ship including hull, propulsion power train, machinery and electrical systems are quantified and ranked. Even difficult-to-capture processes such as throttling and fluid mixing can be incorporated.


The report includes an analysis of a waste heat recovery system. These complex systems can easily contain 70 components. “Through our exergy-based methodology, the true sources of useful energy losses were identified, revealing a picture far from self-evident. Subsequent optimisation in DNV COSSMOS yielded an increase in fuel savings that halved the payback time of the system,” said George Dimopoulos, senior researcher and project manager of this position paper.


A second study examined the fuel pre-processing sub-system for the marine fuel cell on board the offshore supply vessel Viking Lady. This resulted in a solution capable of a remarkable 50 per cent reduction in exergy losses.


When the main engine of an aframax tanker was analysed using operating data in combination with COSSMOS modelling, the true sources of losses were identified with greater accuracy than a traditional energy analysis, says Dimopoulos. “In fact, the standard energy analysis failed to identify the turbocharger as being the second largest contributor to exergy loss.”


With this ‘common currency’ for efficiency, DNV GL provides a way of energy management that will work for all ships, and all system and components that convert energy on board. It thus offers ship managers an unparalleled way of prioritising investment in technology alternatives or new operational strategies.

 

Maritime Reporter October 2013 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Technology

BCG Upgrades Virtual GMDSS Simulator

Buffalo Computer Graphics (BCG) Inc. released an updated version of its Virtual Global Maritime Distress and Safety System (VGMDSS) Simulation software. BCG’s VGMDSS

Australia, US Order Anti-ship Missile Decoys

Design of the next generation of anti-ship missile decoys is set to commence following the signing of two contracts between the Australian Defense Force and BAE Systems Australia Pty Ltd.

Swissco Doubles Rig Fleet

SGX Mainboard-listed Swissco Holdings Limited an integrated, international marine services provider, today announced having completed the acquisition of four additional mobile offshore drilling units,

Marine Propulsion

MAN Propulsion Packages for New Trawler Series

Orders for five fresh-fish trawlers feature two different ship designs and MAN 6L27/38 engines and aft-ship equipment Icelandic owners, HB Grandi, Vinnslustodin hf.

Volvo Penta's New Keel Cooling Option

Volvo Penta is offering factory-built keel-cooled engines for the entire line of marine commercial inboard and sterndrive D4 3.7-liter and D6 5.5-liter engines.

Permanent Magnet Technology for Maritime Propulsion

Multipurpose vessels, especially those that operate primarily at part loads, have been facing pressure when it comes to making money in today’s business environment.

Shipbuilding

MAN Propulsion Packages for New Trawler Series

Orders for five fresh-fish trawlers feature two different ship designs and MAN 6L27/38 engines and aft-ship equipment Icelandic owners, HB Grandi, Vinnslustodin hf.

US Shipyard to Produce GTT's LNG Membrane Tanks

Gaztransport & Technigaz (GTT), a designer of membrane containment systems for the maritime transportation and storage of liquefied natural gas (LNG), via its U.

Swissco Doubles Rig Fleet

SGX Mainboard-listed Swissco Holdings Limited an integrated, international marine services provider, today announced having completed the acquisition of four additional mobile offshore drilling units,

Ship Repair & Conversion

Industry Professionals to Speak at ShipConstructor Conference

The speakers representing various companies at next week's SSI Americas ShipConstructor User Conference, October 7-9, 2014 in Mobile, Alabama, demonstrate SSI's

HII Appoints Brenton as Corporate Director

Huntington Ingalls Industries (HII) announced today that Capt. Kevin Brenton (U.S. Navy, Ret.) has joined the company as corporate director of customer affairs for submarine programs.

New Simulation Tool for Collision Reconstruction

BMT ARGOSS and BMT Surveys, subsidiaries of BMT Group Ltd, the international design, engineering and risk management consultancy, announced an innovative new service

Environmental

Emissions Scrubber Receives Class Approval

Langh Ship received final class approval from Germanischer Lloyd for its exhaust gas cleaning system on m/s Laura (pictured), a 1996-built a 6,500 DWT general cargo

‘Green’ Hybrid-powered Research Vessel Christened

The Maritime Aquarium at Norwalk christened a larger, “greener” new research vessel on Friday, September 26 in preparation for launching a new era in examining,

Cove Point LNG Export Facility Gets US FERC Approval

U.S. federal regulators on Monday approved construction of Dominion Resources Inc's liquefied natural gas export project in Cove Point, Maryland. Cove Point is the fourth U.

Energy

Leak May Sideline New Mexico Nuclear Waste Site

It may be five years before a nuclear waste dump in New Mexico closed by a radiation leak is fully operational again, and the facility will need at least $240

Imperial Oil Completes Maintenance at Kearl Oil Mine

Imperial Oil Ltd said on Tuesday it has completed a two-week major maintenance turnaround at its 110,000 barrel per day Kearl oil sands mine in northern Alberta.

Swissco Doubles Rig Fleet

SGX Mainboard-listed Swissco Holdings Limited an integrated, international marine services provider, today announced having completed the acquisition of four additional mobile offshore drilling units,

Marine Power

MAN Propulsion Packages for New Trawler Series

Orders for five fresh-fish trawlers feature two different ship designs and MAN 6L27/38 engines and aft-ship equipment Icelandic owners, HB Grandi, Vinnslustodin hf.

General Dynamics Bags $ 50 mi Submarine Contracts

General Dynamics Advanced Information Systems, a business unit of General Dynamics was awarded two contract modifications totaling $50 million to continue supporting

General Dynamics takes Rudy deLeon on Board

The board of directors of General Dynamics has elected Rudy deLeon to be a director of the corporation, effective September 30, 2014. DeLeon is a senior

News

DP World Mulls Senegal Free Zone

DP World  is looking to develop a free zone in Senegal, Chairman Sultan Ahmed bin Sulayem said on Wednesday. Sulayem was speaking at an African investment event in Dubai.

MAN Propulsion Packages for New Trawler Series

Orders for five fresh-fish trawlers feature two different ship designs and MAN 6L27/38 engines and aft-ship equipment Icelandic owners, HB Grandi, Vinnslustodin hf.

MOL Merges Group Companies; Upgrades Bridge Simulator

MOL adds DPS and enhances safe operation by integrating expertise through merger Mitsui O.S.K. Lines, Ltd. (MOL) announced the merger of MOL Marine Consulting, Ltd.

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Maritime Security Pipelines Pod Propulsion Port Authority Ship Repair Ship Simulators Shipbuilding / Vessel Construction Winch
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: 0.2548 sec (4 req/sec)