Background

The Grimaldi Green fifth-generation fleet (GG5G-class) sets a trend on new thinking for Roll-on-Roll-off (RoRo) vessels. Grimaldi vessels are among the most modern and environmentally friendly vessels in the Mediterranean and the Baltic Sea. Nine of the ships are operated by Grimaldi Lines in the Mediterranean, while the remaining three are delivered to Finnlines, part of Grimaldi Group. The first vessel “ECO Valencia” was handed over to Grimaldi Lines in October 2020.

The vessels have been designed with environmental regulatory changes in mind to support minimising fuel consumption and sulphur emissions. The electronically controlled engines run on HFO and MGO, and are equipped with exhaust gas cleaning systems (also known as scrubbers) to remove sulphur and other particles. They are also equipped with lithium-ion batteries, which are charged during sea voyage and used for providing electricity during portstays, enabling emissions-free port calls. This is a benefit especially in ports with limited cold-ironing facilities.

The newbuild features a length of 238 meters, a beam of 34 meters, a gross tonnage of 67,311 tonnes, and a service speed of 20.8 knots. It can transport 7,800 linear meters of rolling freight, equivalent to around 500 trailers.

Auramarine’s solution

Auramarine’s fuel supply systems for the GG5G-series ships consists of:

• Fuel Supply Unit AMB-M-26-SS for Main Engines
• Fuel Supply Unit AMB-M-07-SS for Auxiliary Engines

The fuel supply units consist of filters, pumps, heaters, pressure control valves, flow meters, and a viscosity control system.

Both fuel supply units come with a built-in fuel changeover system, which allows the vessel to switch seamlessly between fuels.

The changeover system comprises a changeover valve, a feeder line cooler and an integrated cooler unit with related valves and controllers.