Environment & Energy efficient systems for ships

The Demo Case activities have contributed to enhance the environment & energy efficiency of leisure / passenger ships with a consequent reduction of emission into the atmosphere. Depending on each ship’s design and operational profile, the shipowners will be able to choose among the below-described technologies.

About Shipboard Waste:

• Hydrothermal Oxidation (Leroux & Lotz Technologies, Chantiers de l’Atlantique): this user-friendly process is able to treat all types of waste produced on-board, with no air-emission (no NOx, no SOx, no particles, no furans etc., only steam and CO2), advanced automation, reduced maintenance and able to run 24/7. It also avoids the decanting/drying stage of the waste, which saves much time, energy and space on decks. A demonstrator is onboard a cruise ship.
• Conditioning of Waste (Meyer Werft, Hochshule Emden Leer, Lloyds Register): A good conveyable, hygienically harmless and valuable resource shall be produced from the shipboard generated waste through different conditioning steps in order to make the waste handling easier, more energy efficient and environmentally friendly. Onshore demonstration is in progress.

About Waste Heat:

• Organic Rankine Cycle (Enertime, Chantiers de l’Atlantique): a marine ORC has been designed to cogenerate Electrical Power from the ship’s waste heat. It is now fully compatible with marine environment (incl. high levels of water salinity, roll and pitch, compactness) and available for newbuilds and retrofits to decrease the net power-demand and emissions of ships.

• Energy Storage System (Hutchinson, Chantiers de l’Atlantique): The expected outcome is store waste thermal energy from the engine exhaust pipes while cruising and restitute at port or for peak-shaving, instead of using a fuel-boiler to fulfil the ship’s needs. Development activities have led to an onshore demonstrator of storage system based on high temperatures phase change material encapsulated within paraffin.

About Emission Reduction:

• Particulate and NOx treatment (Hug Engineering, Fincantieri, Rina): this technology will tackle the challenge to treat harmful emissions of particles and NOx for large marine engines. The equipment has the ability of self-regeneration with limited need for heat power, and is also able to include a IMO Tier-III NOx treatment, by a Selective Catalyst Reduction layer which is substantially smaller than state-of-art thanks to the previous particles’ removal. An onshore demonstrator of the particles’ filter has been built in marine representative conditions.

• Solid Sail Technology (Chantiers de l’Atlantique): a foldable self-portative mast is developed in relation to a foldable solid-sail, so that it is possible to install relevant wind-power even on large ships, with long lifetime, high efficiency and advanced automation. An onshore demonstrator is built in marine representative conditions to validate the mechanical and dynamic behaviour of the mast and the sail.