NO96 Super+: the latest GTT's technology with increased thermal performances
GTT membrane technologies continue to evolve over the last years, based on significant feedback from operational experience, in order to meet the requirements of ship-owners and shipyards, while also complying with regulatory changes affecting the sector.
GTT has introduced several new technologies in order to minimise the evaporation of the cargo during operations. As highlighted on the below graph, since 2010, the guaranteed Boil-Off-Rate (BOR) achievable with GTT technologies has been significantly reduced from 0.15%V/day down to 0.07%V/day.
Boil Off Rate of Cargo Containment Systems on 174K LNGC
Until now, the lowest passive BOR available with NO96 system is equal to 0.10%V/d using NO96 L03+ system. In order to complete the NO96 family offer with a guaranteed Boil Off Rate equal to 0,085%V/d GTT has recently developed a new Cargo Containment System named NO96 Super+.
The new NO96 Super+ technology is an evolution of the NO96 containment system maintaining its principal features, in particular the double Invar® metallic membranes and the mechanical anchors fixing the insulation panels to the hull.
NO96 Super+ offers the advantage of a reduction in the heat ingress inside the tank by using insulating Reinforced Polyurethane Foam (R-PUF) panels instead of plywood boxes. Thermal performance is additionally improved by the addition of Glass Wool joints, inserted between adjacent foam panels.
With this innovation, GTT provides a solution to reduce the evaporation of the cargo, with NO96 Super+ guaranteeing ship-owners a daily Boil Off Rate (BOR) of 0.085% of volume for the current standard size design of LNG Carrier of 174.000 m3.
NO96 SUPER+ design description
The erection philosophy is identical to other NO96 systems: the anchoring of the insulation panels is made with couplers benefiting from the excellent feedback for years on NO96 ships. The assembly of the NO96 Super+ have been validated through a mock-up at GTT premises.
NO96 SUPER+ mock-up
The design and validation of NO96 Super+ has been thoroughly reviewed by the classification societies in 2021. This review has led to a Final Approval of the containment system by American Bureau of Shipping (ABS), Bureau Veritas (BV), DNV GL and Lloyd’s Register (LR) as well as the first orders from ship-owners.
