Carnival Corp has revealed the LNG strategy and technology behind Costa Cruises’ two LNG-fuelled newbuilds as they cut steel on its first – Costa Smeralda – at Meyer Turku shipyard today (13 September).
Carnival Corp senior vice president maritime affairs Tom Strang said “Clearly we see LNG as the best solution for the future; it is the cleanest burning fossil fuel that is available today and meets and exceeds regulatory requirements. We expect 20-25% reduction in CO2 from these ships.”
He told Passenger Ship Technology “Personally I see LNG as the fuel for the future.”
He singled out how partnership was crucial for the development of the LNG bunkering supply chain “LNG is not as widely available as we would like it to be but we are working on that and we have a partner that supports us in this: we have chosen Shell and have worked with them to build the infrastructure worldwide.”
Carnival has chosen to bunker the new ships via ship-to-ship, due to the large volumes of LNG needed. The amount of fuel needed for the 3,630 m3 installed tanks means that the ship would not have time to wait in port to be bunkered by trucks.
Meyer Turku has built the LNG tanks inhouse, tailor-making them for the Costa newbuilds.
The plan is for Costa Smeralda to run 100% on LNG, despite having dual-fuel engines – marine gas oil will only be used for ignition for the LNG and as a back-up for safe return to port. Only a tiny amount will be used, around 0.1 gram per kilowatt hour.
The size of the tanks was a challenge as the ship is 180,000 gt. Mr Strang told Passenger Ship Technology “[The LNG tanks] are roughly double the size of the equivalent fuel tanks but by careful design and work with the shipyard we minimised their impact on the overall design.”