Design
The build of Sørvind, the fifth yacht in the SW105 series, was a key focus of Southern Wind Shipyard’s lifecycle assessment calculations
the shipyard’s projectmanagement and ERP systems. ‘In the short term20 to 30 per cent “Cradle to the Gate” reduction is a good target, including the contribution fromthe solar panels,’ he says. ‘Consistent longer termreductions will requiremore effort for smaller improvements.’ Both Dumbell and Micheli are clear that
there are currently no viable alternatives to using carbon fibre for masts and hull structure that can deliver an equivalent level of performance, nor for lead in keel bulbs. They are, however, looking seriously at replacing non-load bearing carbon
composite components, such as internal partitions, with panels made from basalt fibre and recycled PET core materials. The shipyard is already moving away
from teak decks, towards alternatives such as marine maple, Flexiteek and thermally reflective deck paint. The yard’s technical team is also investigating the option of changing the floor bearers inside the boats from carbon to aluminium. Dumbell is looking at sourcing more sustainable bronze components and copper cables, and possibly reducing the amount of copper by using higher-voltage electrical systems. After finding that water-based paint systems can’t match the gloss of a solvent-based paint system, he is now looking at solvent filtration and containment solutions instead. Micheli is keen to work on scenarios
‘Sustainability is part of the design brief for the forthcoming SW 100X’
efficient and sustainable by design. It’s a semi-custom yacht, so the production processes will be inherently lower in terms of impact than a smart custom build where the tooling for the deck moulding is often unique and each yacht is extensively, individually customised. Sustainability was a key part of the brief given to Farr Naval Architects, who have been working with the shipyard’s technical manager to design a hull that delivers the excellent performance and handling of a
Southern Wind yacht with a slightly higher displacement. This will give more scope for considering sustainable alternatives to many of the materials, components and systems they currently use. The LCA also offers real value for smart
This 300kWp array of solar panels on the roof of the shipyard has already reduced its energy footprint significantly
72 SEAHORSE
that can deliver a 10 per cent fuel saving in operational use, which would significantly reduce the yachts’ overall footprint. He says focusing on thermal efficiency – air conditioning systems and the way they are used, as well as larger shade awnings, better ventilation and heat-reflective deck coatings – has a potential to reduce fuel consumption that is comparable with diesel-electric hybrid drive systems. Hybrid drive systems are very appealing for their capability to hydrogenerate electricity while sailing (on the SW96 and SW108, it’s 15kW at 12kts) Importantly, the next model in Southern Wind’s range, the 100X, will be more
custom and full custom build projects. Any new yacht buyer who cares about environmental impact will now be empowered to make fully informed decisions about options for materials, components and equipment, weighing up sustainability against performance and other considerations such as cost, aesthetics and comfort. And as Dumbell explains, the LCA also provides owners with the necessary data if they choose to support companies specialising in climate change or positive environmental projects, thereby mitigating the impact of the build. It’s an exciting prospect for forward-
thinking owners who want to invest in sustainable innovation.
www.sws-yachts.com
❑
CARLO BARONCINI
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