The two LNG-fueled icebreaking RO/ROs on order at China’s Yantai CIMC Raffles shipyard (see earlier story) will each have MAN Cryo LNG fuel gas supply systems (FGSS) and two MAN 9L28/32DF dual-fuel auxiliary engines.
The 242 meter long ships are being built for Sweden’s Wallenius SOL and will be the largest vessels thus far to meet the Finnish/Swedish ice class 1A Super standard, ensuring year-round service in the frozen Gulf of Bothnia.
They will have a sailing speed of 20 knots and a capacity of 5,800 lane meters. Delivery of the vessels is scheduled for 2021 and the order includes an option for two further vessels.
Wallenius SOL is a shipping line formed by Wallenius Lines and Svenska Orient Linien (SOL).
Louise Andersson, Head of MAN Cryo, said: “These RO/ROs will operate in a sensitive, sulfur-emission-control area in harsh winter conditions where a reliable LNG fuel-gas supply system is of the utmost importance. We are very pleased that both shipyard and shipowner trust us to deliver the fuel-gas supply system for such unique vessels.”
MAN Cryo’s scope of supply for the vessel covers:
- 2 × 685 cu.m vacuum tanks including tank connection spaces (TCSs) with LNG fuel pumps
- bunker stations with a capacity of 500 m3/h
- automation, emergency shut-down and gas-detection systems.
Under-deck mounted tanks with air locks allow the amount of fresh air sucked into the tank rooms to be reduced to a minimum. This is an important consideration in the tough winter conditions the ships are set to operate in, where the amount of cold air in the vessels needs to be kept to a minimum.
The new vessels will bring many environmental benefits compared with standard, heavy-fuel ships including reduced fuel consumptions and lower emissions:
- 50% fuel consumption per tonne-km thanks to larger vessels, more efficient engines and ship design
- 60% decrease in emissions of greenhouse gases per transported unit in CO2 equivalents
- 98% decrease in sulphur dioxide (SOx) emissions
- 85% decrease in nitrogen oxides (NOx)
- 95% decrease in particulate emissions.