French company GTT, best know for the supply of tanks for LNG tankers, said Tuesday its new concept for a ballast-free LNG bunker & feeder vessel called Shear-Water had received “Shear-Water”, a new approval in principle from Bureau Veritas (BV).
The concept has previously won AiPs from China Classification Society and DNV.
Describing its concept, GTT said: "The majority of merchant vessels worldwide use ballast water when they are empty or partially loaded in order to maintain seaworthy conditions. Therefore, a considerable quantity of ballast water is carried by ships every day. Even when ballast water is treated, there is a risk of transferring harmful aquatic organisms and pathogens from one area to another."
"The solution developed by GTT eliminates this risk completely. In addition, removing the ballast water treatment system also reduces the energy consumption and CO2 footprint of the vessels. GTT has been developing an approach to eliminate altogether the requirement for ballast water."
The GTT “Shear-Water” concept is based on the currently proven vessel of 18,700 m3 capacity with two membrane tanks. The design also features a new hull shape, in a “V”, which differs from the standard square-shaped mid-ship sections traditionally used for LNG carriers.
"An exhaustive testing campaign has been carried out at the HSVA Hamburg tank test facility in connection with power-speed, maneuverability and seakeeping. A sloshing test campaign has also been carried out by GTT to ensure the technical feasibility of the project: the excellent results obtained helped approve the concept," GTT said.
Philippe Berterottière, Chairman and CEO of GTT, said: “We are proud to have developed “Shear-Water”, an innovative ballast-free design for LNG bunker and feeder vessels. This new technological solution allows a reduction in investment and operating costs, simpler operations as well as a reduction in corrosion supporting a longer service life. Obtaining this approval by Bureau Veritas constitutes recognition of the ecological relevance and performance of our technological solution.”
Mathieu De Tugny, Vice-president of Bureau Veritas said: “Bureau Veritas has given approval in principle to this new design, which has clear performance and environmental benefits: elimination of the need for ballast water treatment systems and equipment; easier maintenance of the void spaces surrounding the cargo, and reduced propulsion power requirements. Bureau Veritas has monitored and reviewed all the test results performed to support its approval in principle.”