TECHNOLOGY group Wärtsilä is to supply a new, patent-pending liquefied natural gas fuel storage and supply system for two hopper dredgers.

The ships are being built by Keppel Offshore & Marine for Van Oord, the Dutch marine contractor.

The Wärtsilä system comprises two 640-cubic-metre, single-shell polyurethane insulated storage tanks, featuring a new ‘In Line Tank Connection Space’ that contains the process equipment.

The LNGPac-ILTCS has the process equipment mounted in front of the tanks, instead of the usual on top installation.

For on-deck applications this significantly 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.


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.

“Our experience in the marine industry’s LNG fuel gas market is unmatched, and this latest development of the famous Wärtsilä LNGPac fuel storage, supply and control system reflects this knowledge and experience,” Antti Kuokkanen, vice president, electronics, entertainment and processing, Wärtsilä Marine, said.