Technology group Wärtsilä will supply a patent-pending LNG fuel storage and supply system for two new trailing suction hopper dredgers (TSHDs). With the process equipment mounted in front of the tanks, instead of on top, the system improves view lines.
Keppel Offshore & Marine is building the ships for Dutch marine contractor Van Oord. Wärtsilä will supply the LNG system for the first vessel, the Vox Ariane, in mid-2020. In autumn 2020, the system will be supplied for the second vessel, the Vox Apolonia. Both vessels are to be delivered in 2021.
The LNG storage and supply system comprises two single-shell polyurethane insulated storage tanks with a capacity of 640 square metres. An “In Line Tank Connection Space (ILTCS)” contains the process equipment. With the process equipment in front of the tanks, the vessel’s view lines are improved for better navigational safety. In addition, the risk of damage to equipment that is typically installed on top of a single-shell tank is reduced.
When the tank is installed below deck, the ILTCS improves fuel storage volume because there is no process equipment on top of the tank. This also simplifies installation of the LNG system.
Picture: Wärtsilä LNG fuel storage and supply system for two new trailing suction hopper dredgers (picture by Van Oord).