GTT, Alwena Shipping & Zhoushan receive AiP for LNG & jumboisation retrofit concept

GTT, Alwena Shipping & Zhoushan receive AiP for LNG & jumboisation retrofit concept

GTT, Alwena Shipping, and COSCO Shipping Heavy Industry (Zhoushan) shipyard, have received an Approval in Principle (AiP) from the classification society Bureau Veritas (BV) for a new concept, combining LNG retrofit and jumboisation, applied to large container ships.

GTT carried out the LNG Mark III membrane tank design while its integration into the ship was designed and validated by Alwena Shipping. CHI Zhoushan shipyard validated the operational aspects of the project, including the work sequence, planning and workforce resources.

The increase in the length of the ship (or jumboisation), combined with the conversion of the propulsion and electrical generation systems to LNG enable a reduction in the operating costs of the ship, which limits the financial impact of the immobilisation period required for the retrofit operation.

LNG propulsion offers shipowners a solution to comply with the environmental regulations being adopted by the IMO by 2045. In comparison with a conventional fuel-powered container ship, the converted vessel reduces CO2 emissions by around 23 per cent over an 83-day Europe-Asia return trip (port calls included).

The work carried out within the Joint Development Program (JDP) between GTT, Alwena Shipping and CHI Zhoushan supports the technical, operational and commercial design of the conversion and jumboisation operation, while also proposing a competitive industrial plan.

The result of this joint work shows the way to contribute to decarbonise part of the container ship fleet currently in operation.

BV confirmed the conception of the retrofit, as well as the layout of the LNG Fuel Containment System and Gas Fuel Supply System supported by an auxiliary safety system in accordance with IGF Code and BV Rule NR 529. After reviewing the modifications to the vessel and the description of the associated operations, Bureau Veritas Marine & Offshore gave its AiP on the concept on January 11th, 2022.

Ludovic Gérard, president of Alwena Shipping, said: “This project is remarkable in many ways: while switching to a transition fuel offering reductions in CO2, particulate and NOx emissions, this concept approved by Bureau Veritas also extends the life of the vessels converted and increases container capacity thus contributing to reducing the tension on the container transport markets.”