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Obsidian: Feadship’s first delivery of 2023 raises the bar on carbon reduction

Feadship is another step closer to the goal of producing carbon-neutral superyachts by 2030. The recently built 84.20-metre Obsidian is the first of Feadship’s new generation of large yachts furthering carbon reduction through hulls optimised at cruising speed instead of top speed, weight control, advancements in electric propulsion, and the ability to run engines on non-fossil diesel fuel called HVO. In fact, the yacht's trials were conducted with the generators running on this second-generation biofuel, reducing carbon emissions by 90% compared to yachts operating on fossil fuels.

The brief for the yacht was to be more energy efficient and emit less carbon than Feadship’s ground-breaking hybrid yacht, Savannah , which launched in 2015. Reducing the environmental impact by more than 30% would have been a tall order in any case, but the entire 12-month design period for Obsidian occurred at the height of a global pandemic. With Covid-19 lockdowns, none of the designers, engineers, or other parties were able to collaborate in person.

Working in parallel, Bram Jongepier, Senior Designer at Feadship De Voogt Naval Architects, developed a sustainability index, providing a great deal of guidance on how all of a yacht’s components and operations contribute to its carbon profile and environmental impact.

Reducing CO2 emissions is a top priority, but Feadship goes even further by addressing the overall environmental impact of its vessels. The emissions of nitric oxide and nitrogen dioxide (NOx), particulate matter, hydrocarbons, and the impact of building materials like steel, aluminium, fairing compounds, antifouling, teak, interior finishing, and more, are under scrutiny. This, together with CO2 emissions, is what we call environmental impact, which is calculated using life cycle assessments (LCA).

Yacht Environmental Transparency Index

Jongepier’s work became known as YETI, the Yacht Environmental Transparency Index. Operating on the philosophy that one cannot control what one cannot measure, the algorithms describing the environmental impact of CO2, NOx, particulate matter, shore power, and fuel production have been made freely available by Feadship to the signatories of the Water Revolution Foundation, a yachting industry association dedicated to driving sustainability in the superyacht industry through collaboration and innovation. This led to a Joint Industry Project (JIP) under the flag of the Water Revolution Foundation with twenty major partners in the yachting industry.

The YETI JIP produced a tool which, with data augmented now by other partners like engine manufacturers, predicts the environmental impact of a standardized operational year in the yacht’s lifecycle. Jongepier estimates that YETI effectively captures 90% of the total lifecycle of a yacht and each new build helps gather more data. It is estimated that Obsidian will operate with 27% less total environmental impact than a yacht of similar size launched only five years ago if run on fossil fuel, and 60% less when using HVO.

For Obsidian , the first step was building on innovation from the award-winning Savannah . Using Feadship’s Advanced Electrical Drive (FAED) program for diesel-electric hybrid power, Obsidian has 4.5 times more electrical storage capacity than our first hybrid yacht, Savannah . She has no drive shafts and no rudders, preventing added drag caused by these appendages. Propulsion and steering are supplied by a pair of Veth contra-rotating thrusters that deliver both functions. Veth’s experience with compact units for ships operating on rivers was seen as a perfect fit for a yacht specified for a relatively shallow draft. Feadship and Veth collaborated on computational fluid dynamics (CFD) analysis of the shapes of the drive legs and the propellors to maximize efficiency and minimize vibration, dampening vibration being another key component of the brief.

Powering it all is a 4.5 MWh battery bank that is charged by four generators — two large and two small, custom, variable speed units based on tweaked CatC32 engines with permanent magnet alternators that deliver power as needed. Where Savannah and Lonian – which launched in 2018 – operated on 560 volts, the DC system on Obsidian is a staggering 1,000-volt system because the yacht is fully powered by electricity. A total of 560 battery modules are housed in a special chilled room amidships on the tank deck, revealing another benefit of the hybrid system: The components no longer need to be adjacent. The thrusters are in the best location for steering and water flow, while the generators and their exhaust systems, batteries, and electrical switchboard are located elsewhere for optimal weight distribution and crew access. Obsidian should be able to cruise for 35 nm at 10 knots on batteries alone. At anchor, the batteries will provide silent operation for 10-15 hours.

Fuel savings

Advanced propulsion alone, however, would not result in the level of fuel savings required. When analysing Obsidian using the YETI tool, it revealed that about 60% of the energy consumed goes simply to powering the onboard lifestyle – the air conditioning, heating, hot water, lighting, cooking, entertainment electronics, pools, and laundry service. Reducing the energy needed to provide for the yacht’s “hotel” load became the target.

Several major innovations adapted for Obsidian address these target areas through peak load shaving and reducing HVAC demand through the computerized management of cooling guest and crew zones. But since making and using energy creates heat, capturing unwanted or “waste” heat to be used for other purposes became a key focus. Out of every 100kW of energy created by fossil fuel combustion in a typical internal combustion engine, only 35 to 40% is effective mechanical energy, with the rest being heat, usually discarded overboard with the water-cooling system and in the exhaust gasses. Feadship’s design and engineering team began by developing a much more comprehensive system than simply using generator cooling water to heat a swimming pool, a process that has become standard for many superyacht builders.

Considering that 25% of that "hotel" energy demand is about making heat, everything that needed heat was identified. The largest consumer was air conditioning.

The reason being that to sufficiently dehumidify the surrounding sea air, the HVAC system needs to cool incoming fresh air to about 7 degrees Celsius, but then, to keep the interior from feeling like a meat locker, heating units must warm the air to the desired temperature for each room.

Many points of energy savings

Conventional installations typically reheat with an electric heating element, but Obsidian uses waste heat for that purpose. Not only is waste heat captured from the generators, but also from the AC chillers themselves. This is not just free energy, but it is essentially carbon-free energy because it reuses incidental heat generated by another function. “There are so many points of energy savings integrated on this yacht that it is hard to count,” said Project Manager Mark Jansen.

Urged to explore all avenues, Feadship’s engineers introduced an innovative heat pump system to pull heat from various sources, including ambient sea water. Using a heat pump, which transports thermal energy (heat) from one place to another, is five times more efficient than simply making heat with a regular electrical heating coil, according to Jongepier.

An onboard computer system helps to choose seamlessly the appropriate combination of sources. This translates into the following operational modes:

• In harbour at normal sea temperatures plugged into shore power: Heat is provided by AC compressor waste heat, augmented by the heat pump if necessary.
• At anchor at normal sea temperature, operating on battery power: Heat provided by AC compressor waste heat, augmented by heat pump if necessary.
• Sailing, at anchor or in harbour at normal sea temperature with generators in operation: All necessary heat provided by generator waste heat.

Because the path to carbon-neutral superyachts goes far beyond a single solution, Obsidian also involved fresh approaches to the hull form. De Voogt’s naval architects created the low, slim hull, optimized at cruising speed using computational fluid dynamics (CFD) with the final form being made into a model tested in a towing tank. Complex engineering for balance and weight reduction includes new applications for carbon fibre. The louvered aft deck overhangs, for example, are all carbon fibre attached to the aluminium superstructure and require no support pillars. This weight benefit also offered new deck layout possibilities.

For the first time in many years, Feadship is delivering a yacht with a single level engine room, which gave her designers considerably more freedom in creating the interior layout. It also lends more space for guest accommodation and features a total of seven staterooms. According to Jansen, the volume of this 84-metre yacht is typical of that on 100-metre Feadships.

The layout is just as bold and modern as the exterior profile would suggest. Both the exterior styling and interior design are by the British firm RWD, in collaboration with MONK Design.

There are surprising destination spaces such as an asymmetrical atrium staircase leading to a lower deck dining saloon with an entire wall that opens to provide a terrace view just 75 cm above sea level.

Near the stern is an Aqua Lounge where massive windows below water level offer a unique view from the nearby gym. The Aqua Lounge can also function as a cinema and even a classroom.

From decks to the interior, the design leitmotif is all about surprise – most of the corridors and many of the rooms, as well as all of the al fresco living spaces, are not oriented on a fore and aft or athwartships axis. In fact, except for staterooms, none of the interior rooms have any 90-degree angles. A hidden staircase to a study and a sunken lounge on the main deck are just two more of the unexpected interior elements. But the biggest surprise involves the use of submarine anchors. Eliminating the need for a mooring deck forward allows Obsidian to feature a fantastic interior bow observation lounge with double curved glass floor-to-ceiling windows. Access is via a main deck corridor from the guest accommodation area through the tender garage to this hidden gem.

In keeping with the carbon reduction theme, both of the yacht’s primary tenders are electric-powered and custom made by Tenderworks. Four fast charging stations installed by the yard will allow them to be charged in the water or in the tender garage.

After the sea trials it turned out that Obsidian is even more efficient than previously calculated.

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Feadship delivers 84.2m hybrid superyacht Obsidian

Tuesday, August 1st, 2023

Written by: Marine Industry News

Feadship has launched its first vessel of 2023, the 84.2m hybrid superyacht Obsidian .

The Dutch shipyard, which specialises in custom superyachts, says Obsidian marks another step closer to the goal of producing ‘carbon-neutral’ superyachts by 2030. The vessel is the first of Feadship’s new generation of large yachts furthering carbon reduction through hulls optimised at cruising speed instead of top speed, weight control, advancements in electric propulsion, and the ability to run engines on non-fossil diesel fuel called HVO (hydrotreated vegetable oil).

Feadship says the yacht’s trials were conducted with the generators running on HVO, which can reduce carbon emissions by 90 per cent compared to yachts operating on fossil fuels.

The brief for the yacht was to be more energy efficient and emit less carbon than Feadship’s previous hybrid superyacht, Savannah , which launched in 2015.

Bram Jongepier, senior designer at Feadship De Voogt Naval Architects , has developed a sustainability index, providing guidance on how all of a yacht’s components and operations contribute to its carbon profile and environmental impact.

Jongepier’s work on these LCAs is now known as YETI, the Yacht Environmental Transparency Index. The algorithms describing the environmental impact of CO2, NOx, particulate matter, shore power, and fuel production have been made freely available by Feadship to the signatories of the Water Revolution Foundation .

This collaboration led to a Joint Industry Project (JIP) under the flag of the Water Revolution Foundation , with 20 major partners in the yachting industry.

The YETI JIP produced a tool which, with data augmented now by other partners like engine manufacturers, predicts the environmental impact of a standardised operational year in the yacht’s lifecycle.

It is therefore estimated that Obsidian will operate with 27 per cent less total environmental impact than a yacht of similar size launched only five years ago if run on fossil fuel, and 60 per cent less when using HVO.

Obsidian has 4.5 times more electrical storage capacity than Savannah . The yacht has no drive shafts and no rudders, preventing added drag. Propulsion and steering are supplied by a pair of Veth contra-rotating thrusters that deliver both functions. Powering it all is a 4.5 MWh battery bank that is charged by four generators — two large and two small, custom, variable speed units. Obsidian should be able to cruise for 35 nm at 10 knots on batteries alone. At anchor, the batteries will provide silent operation for ten to 15 hours.

With around 60 per cent of the yacht’s energy consumed by the ‘hotel load’ (heating, cooling, lighting, entertainment and so on), further fuel savings have been made by peak load shaving and reducing HVAC demand through the computerised management of cooling guest and crew zones.

Obsidian also captures waste heat from the generators and the AC chillers themselves, for repurposing in the HVAC system. “There are so many points of energy savings integrated on this yacht that it is hard to count,” says project manager Mark Jansen.

The yacht has a single-level engine room, which Feadship says gave its designers considerably more freedom in creating the interior layout. It also lends more space for guest accommodation and features a total of seven staterooms. According to Jansen, the volume of this 84-metre yacht is typical of that of 100-metre Feadships.

Both the exterior styling and interior design are by the British firm RWD, in collaboration with Monk Design.

An asymmetrical atrium staircase leads to a lower deck dining saloon with an entire wall that opens to provide a terrace view just 75cm above sea level. Near the stern is an ‘aqua lounge’ where massive windows below water level offer a unique view from the nearby gym. The aqua lounge can also function as a cinema and even a classroom.

A hidden staircase to a study and a sunken lounge on the main deck are two more unexpected interior elements of the hybrid superyacht. But the biggest surprise involves the use of submarine anchors. Eliminating the need for a mooring deck forward allows Obsidian to feature an interior bow observation lounge with double curved glass floor-to-ceiling windows. Access is via a main deck corridor from the guest accommodation area through the tender garage.

In keeping with the carbon reduction theme, both of the yacht’s primary tenders are electric-powered and custom-made by Tenderworks. Four fast charging stations installed by the yard will allow them to be charged in the water or in the tender garage.

Feadship says that, after the sea trials, it turned out that Obsidian was more efficient than originally calculated.

In April, Feadship confirmed it is entering the hydrogen superyacht market. Feadship confirms the yacht — which is already in-build — will house a cryogenic fuel tank, storing liquified hydrogen at around -250°C; being the densest storage method of pure hydrogen. The shipyard says this fuel cell bank will be sufficient to sail at a decent speed while still powering the hotel load in summer conditions.

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By SuperyachtNews 31 Jul 2023

Feadship delivers 84m Obsidian

The dutch shipbuilder claims its latest renewable diesel-powered delivery brings it one step closer to building completely carbon-neutral yachts by 2030….

Feadship has delivered 83m Obsidian , its latest yacht designed to run on renewable diesel and electric propulsion. The ship is the first of Feadship’s new generation of large yachts with the aim of reducing carbon emissions through advancements in weight control, propulsion technology and the use of Hydrotreated Vegetable Oil (HVO) fuel, instead of traditional diesel.

Obsidian's trials were conducted with the engines running on HVO, which has the potential to reduce carbon emissions by 90% when compared to yachts operating on fossil fuels. Notably, HVO is a ‘second-generation’ biofuel, meaning that it was made using by-products rather than crops that compete with food production.

Feadship says the aim of the project was to build a more energy-efficient vessel than its first hybrid yacht, Savannah , which launched in 2015. Using Feadship’s Advanced Electrical Drive (FAED) programme for diesel-electric hybrid power, Obsidian has 4.5 times more electrical storage capacity than Savannah . 

Bram Jongepier, Senior Designer, De Voogt Naval Architects , developed the Yacht Environmental Transparency Index (YETI),  a sustainability index that provides guidance on how a yacht’s components and operations contribute to its carbon footprint and environmental impact, and used it during Obsidian's  12-month design process.

According to Jongepier, YETI can calculate 90% of the total lifecycle of a yacht. With YETI available to Water Revolution Foundation signatories, the Foundation predicts that the environmental impact of O bsidian  will operate with 27% less total environmental impact than a yacht of similar size when powered by fossil fuel, and 60% less when using HVO. 

Inside the hull, Obsidian’s propulsion and steering are supplied by two Veth contra-rotating thrusters that deliver both shaft and rudder functions. These are powered by a 4.5 MWh battery bank that is charged by four generators — two large and two small, custom, variable speed units based on tweaked CatC32 engines with permanent magnet alternators. 

The change in propulsion methods alone didn't provide the level of fuel savings Feadship desired. Using the YETI tool, the shipyard noticed about 60% of the energy consumed goes simply to powering the onboard lifestyle. To combat this, Feadship sought to utilise the yacht’s waste heat for efficiency.

Feadship’s engineers introduced a heat pump system to pull waste heat from ambient seawater, generators and AC chillers. The heat pump then transports thermal energy from one place to another and is five times more efficient than making heat with a regular electrical heating coil, according to Jongepier.

Obsidian also has a single level engine room, which gave the designers more freedom in creating the interior layout and more space for guest accommodation with a total of seven staterooms. Jansen says the volume of the yacht is more typical of that on 100m Feadships. Both the exterior and interior design are by the British firm RWD and Switzerland-based MONK Design.

Obsidian will also employ Quantum XT™ (extendable) Fin Stabilizers, a semi-retractable boat stabilizer fin system that operates underway and at zero speed, optimised for energy efficiency.

Renewable diesel and biofuels are becoming more prevalent in superyachting as the race to decarbonise the industry continues. And it is availability is increasing too. Recently,  Peninsula announced that it will supply biofuels to yacht owners in the Gibraltar Strait and surrounding areas, having recently received its International Sustainability and Carbon Certification (ISCC).

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Feadship Full Custom Obsidian Yacht Hull number 710

Feadship full custom obsidian price and sales info, feadship full custom obsidian overview, feadship full custom obsidian specifications.

Feadship Full Custom Obsidian Description

Accommodation.

The Superyacht Feadship Full Custom Obsidian luxury interior sleeps up to 12 guests in 6 staterooms. She is also capable of carrying up to 27 crew onboard to ensure a relaxed luxury yacht experience. Timeless styling, beautiful furnishings and sumptuous seating feature throughout to create an elegant and comfortable atmosphere.

Feadship Full Custom Obsidian impressive leisure and entertainment facilities make her the ideal yacht for socialising and entertaining with family and friends.

Construction & dimensions

Feadship Full Custom Obsidian features a Displacement Steel hull and Aluminium superstructure. She was built to classification society rules.

Performance

Powered by engines and driven by Pods/Diesel-electric Superyacht Feadship Full Custom Obsidian is capable of a top speed of 17 knots, and comfortably cruises at 12 knots. With her 240000 litres fuel tanks she has a maximum range of 5500 nautical miles economic cruising speed. Her water tanks carry 50000 litres of fresh water.

Purchase Feadship Full Custom Obsidian

Feadship Full Custom Obsidian is currently not available for sale, to find out more about this superyacht please contact your personal Feadship yacht specialist.

Charter Feadship Full Custom Obsidian

Feadship Full Custom Obsidian is currently not available for charter, to find out more about this superyacht please contact your personal Feadship charter broker.

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• This 246-Foot Electric Superyacht Concept Is Designed to Shine Like a Diamond

Feadship's new C vessel catches the light just like the gem.

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At the center of the C lies an atrium with floating stars and a lift without walls that allows seafarers to navigate decks in a novel fashion. Highlights of the living quarters include a duplex owner’s suite, a partially enclosed sea lounge that can be used at anchor or on the waves, a beach club with a sea-level dining area, and a private observation deck with an articulating crow’s nest. To top it off, C is outfitted with two infinity pools that match the hexagonal shape of the atrium and other seating areas.

C also shines on the technology front. She features a sleek hull and a fully electric propulsion system similar to sisterships Breathe and Savannah that renders her 30 percent more efficient than a typical 246-footer with dual shafts, propellers, and rudders, according to Feadship. Her streamlined underwater profile means less wake, too.

C will also be equipped with fuel cells and lithium-metal batteries that will together cover all power needs. (Feadship has also incorporated fuel cells on Project 821 .) Green methanol will be the fuel of choice due to its relatively high density and ease of use. Normal cruising speed on the fuel cells is 14 knots, while a top speed of 17 knots can be achieved by adding the battery power. In addition, two wave-actuated fins can generate enough grunt to cover one-third of the hotel load.

C will be fully unveiled at the Monaco Yacht Show next week. The yacht is just a concept at this stage, but Feadship says she is completely buildable. Perhaps the yard will land a buyer at the show.

Rachel Cormack is a digital editor at Robb Report. She cut her teeth writing for HuffPost, Concrete Playground, and several other online publications in Australia, before moving to New York at the…

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