Where to stow all those ‘toys’ that burden the superyacht owner was a question thankfully answered at the recent Monaco Yacht Show by luxury yacht builder Amels in the form of their superyacht ’shadow’ craft, the 67 meter (220.3 ft) long Garçon.
Superyacht Support Vessel Garçon: Photo courtesy of Amels
A speedboat, sets of jet-skis, a sailboat, perhaps even a submarine and a helicopter, all take up space that might otherwise be used for serious leisure aboard the superyacht, yet despite changes to the recently revised Large Yacht Code (LY3) which will lift the 3,000 gt size limit for new-builds from late 2013, it seems a growing number of superyacht owners do find the support vessel an attractive proposition. Not only does the craft provide an answer to the space problem, but it also enables fuel and store replenishment at sea, thus avoiding the need for extended voyage itineraries to be figured around bunker port calls.
Superyacht shadow su... [More]
A new high-speed marine diesel engine was introduced a few days ago by Caterpillar Marine Power Systems. The model C175-16, generally thought to be an improved version of the engine launched last year, is claimed by the manufacturers to be the cleanest-burning engine of its size in the world.High-speed four-stroke trunk piston engines are widely specified for propelling small, generally specialised, commercial vessels, such as offshore vessels, tugs and workboat applications, which is exactly the market Caterpillar has in mind for the new engine, although this unit might well serve as a main and emergency genset on any size of ship.
High-speed Marine Diesel Engine CATERPILLAR C175-16: Photo credit Caterpillar Marine Power Systems
The 84.67 ltr displacement C175-16 engine, latest in a line of high performance engines designed to meet EPA Tier 3 and IMO Tier II emissions requirements, is rated at 2001/2168 bkW at 1600 rpm. With a bore of 175 mm (6.9 in) and a stroke o... [More]
One of the most innovative warships in the world was launched recently, from remote, tropical Banyuwangi on the sea coast of Java, Indonesia, where North Sea Boats has a shipyard. The high-speed littoral waters patrol boat – to be named KRI Klewang – has a wave-piercing trimaran hull form (offering a very stable weapons platform) constructed exclusively of infused vinylester carbon-fibre composite.
Wave-piercing Trimaran Patrol Boat KRI Klewang: Photo credit North Sea Boats
This composite medium was chosen for its multiple benefits including: reduced weight (laminated carbon fibre has a density nearly half that of aluminium alloys) and reduced maintenance (carbon composites cannot corrode and exhibit extremely high fatigue limits). If that were not sufficient justification, this material also provides the nil magnetic signature, reduced thermal and acoustic signatures required to suit the role of this warship.This fairly remote area of Indonesia lacked the highly ... [More]
Oil fuel is the major operational cost (not counting labour) of a typical commercial vessel followed by equipment maintenance. By closely monitoring fuel consumption, engine and other vital system data by the vessel crew and corporate office, substantial savings can be realised.The key is to have that data available in front of all the right persons at the right time allowing operational changes to be made quickly to optimise efficiency; better still if there are no monthly fees to be paid for the service. Just such a system was recently installed by American company Krill Systems in two of the U.S. National Oceanic & Atmospheric Administration (NOAA) specialised ocean research vessels, Henry B.Bigelow and Pisces.Each of these two ships has its own onboard database, called the Vessel Operations Centre (VOC), which through displays enables operators to make the most economical fuel settings on board. At the same time sensor data is synchronised with the other ship’s VOC ... [More]
A system that puts waste heat from main engine plant to productive use by adding to ship's electrical supply has been installed by Swedish manufacturers Opcon Marine aboard Wallenius Lines' car/truck carrier MV Figaro, and is reportedly being tested and fine-tuned. This fuel-saving technology is suitable for marine diesel engines sized 5 MW and upwards, and promises typical bunker savings on a 15 MW engined vessel of between 5 and 10 percent.
Energy Sources and Electrical Power Schematic: Image courtsesy of Opcon Marine
Opcon Powerbox Offers Two WHR SystemsPowerbox utilises waste heat recovery (WHR) by means of two separate technologies, and both have been installed in the machinery space of MV Figaro.
Opcon Powerbox WST (Wet Steam Turbine), is a special type of steam turbine that generates electricity from wet or saturated steam that does not require overheating, unlike other, more conventional steam turbines.
Opcon Powerbox ORC (Organic Rankine Cycle), utilises low-v... [More]
Hydraulic oil cleaning system Europafilter (marketed by the UK’s Armada Marine Hydraulics) turned out winner of this year’s ‘Spirit of Innovation’ competition in the ‘Marine Equipment, Hydraulics and Materials’ category at Seaworks 2012.The patented filter was the result of research embarked on in the early 1980’s by Norwegian innovator, Aegir Björnsson, who set the bar high indeed in a quest to invent a device that would make used oil as clean as or even cleaner than new oil. Evidently he succeeded as we shall see, but first how does it work?
Hydraulic Oil Impurity
Analysis of the content of impurities in hydraulic oil after running for some time in a system, usually reveals a large amount of particles smaller than 5 micron. More than 70% of these particles may be smaller than 1 micron; the reason being that such tiny particles pass through existing filters. These particles, smaller than one micron, can be divided into two types: hard ... [More]
German propulsion specialist Schottel extends his product range with a RIM Thruster (SRT)
Noise and low-vibration drives, highly efficient, space-saving, weight-reduced and eco-sensitive are particularly requested at ships, which are operating very often in DP mode or if special comfort is required. With the Schottel RIM Thruster (SRT) the German propulsion specialist extends his product range with four sizes (200 – 800 kW).
The SRT is an all electrical drive system without gear or drive shaft. The stator of the electric motor is mounted into the outer part of a tunnel. Blades are attached to the inside of the rotor. According to Schottel the SRT is a drive propulsion system capable of transmitting the electric power directly into propulsion without any transfer loss of gears and without noise emission caused by a gear box. The optimized hydrodynamic design, with the blades inside, results into a remarkable reduction of cavitation.
The design of the Schottel RIM thruster ... [More]
Hamburg (Germany) based Lehmann&Michels GmbH announces a 100% reliable working fuel change-over system from HFO to DFO and vice versa.No Change, No EntryThis is the Motto valid for all vessels passing all Emission Control Areas and it is a “MUST” to be applied on the date of 1st of January 2015, when the consumption of main and auxiliary machineries on heavy fuel oil must be changed to distillate fuel oil with a sulfur content less than 0.1 %. Currently, the change over from HFO to MGO is not done so frequently, except before entering Californian Waters and EU Ports.To fulfill international legislation (CARB, IMO) it is necessary that vessels are able to change over from HFO to DFO (MGO/MDO). The difficulty during the change-over process is to ensure that the gradient of temperature change meets the requirements of the engine manufacturer. If the change-over process fails a vessel can run out of control due to lack of power and will have high spare part costs for repair... [More]
Designers of Germany’s shipyard Abeking&Rasmussen made a further development of their very succesful SWATH-concept and named the result „SWASH®A&R” (Small Waterplane Area Single Hull): a 20m boat with only one of the proven hulls from the “SWATH®A&R”-line. In this the drive motor is placed. To give the “SWASH®A&R” more stability it receives two outriggers on each side, similar to a trimaran. With this further development starts a new chapter of the success story of the “SWATH@A&R” technology. These special ships with lengths of 25, 40, 50, and 60m are in worldwide service as pilot station ships, pilot tenders, wind farm tenders as well as private motor yachts. Meanwhile more than 25 of this up to 60m long double-hull form ships have been delivered or, for the time being, are under construction.
Now, the shipyard looks for new applications and a smaller variant for service at police, custom, pilots or... [More]
Container ship operators looking for the lowest possible fuel oil consumption at any engine load will be interested to hear word from MAN Diesel & Turbo that the first super-long-stroke large bore two-stroke engine specifically designed for them, the S90ME-C9.2, has just successfully completed trials on Hyundai Heavy Industries Engine & Machinery Division’s test bed.
Marine Diesel Engine MAN S90ME-C9.2: Photo credit Man Diesel & Turbo
The new engine, of reduced size for container ship engine rooms (although the largest ever designed by MAN) is based on the VLCC-optimised S90ME-C8 engine, as operators look to reduce operating costs through slow steaming, turbocharger cut out and low-load engine optimisation; all of which are offered by the new engine. Engine Design Concept – MAN S90ME-C9.2
Low-speed two-stroke main engines of MAN’s existing MC type, with a chain driven camshaft, have limited flexibility with regard to fuel injection and exha... [More]