The Finnish technology group Wärtsilä is to supply a unique and patent-pending LNG fuel storage & supply system for the 2 new trailing suction hopper dredgers. The vessels are being built by Keppel Offshore & Marine for Van Oord, the Dutch marine contractor.

The Wärtsilä’s system comprises two 640 m3 single-shell polyurethane insulated storage tanks, featuring a new and innovative ‘In Line Tank Connection Space (ILTCS)’ that contains the process equipment. This LNGPac-ILTCS has the process equipment mounted in front of the tanks, instead of the usual on top installation.

For on-deck applications, this considerably benefits the vessel’s view lines for better navigational safety, while also reducing the risk of damage to equipment that is typically installed on top of a single-shell tank. Moreover, for below deck installation, the ILTCS improves fuel storage volume efficiency by avoiding the need to have the process equipment on top of the tank, which simplifies installation of the LNG system.

The Wärtsilä LNGPac fuel systems are scheduled for delivery to the yard in mid-2020 for the first vessel, and in autumn 2020 for the second one.