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1 ISSUE 134 JUNE 2012 EXPLORERS LORETTA ANNE RAINBOW TECHNOLOGY INNOVATION The burgeoning phenomenon of Built for a repeat owner, the third The hybrid engine and power Focusing on new ideas and future explorer yachts and whether their and largest yacht from Alloy Yachts system of the newest J-Class yacht thinking affecting all sectors of the description reflects their vocation. to bear that name. that s taken years of development. industry. Page 41 Page 59 Page 91 Page 100 green energy solutions The Power of Hybrid The Superyacht REPORT

2 Drachten, 1st may 2012 Hybrid Power Systems Hybrid Power Systems BV was founded in December 2009 as a sister company of WhisperPower BV, which was formed in From 1998 up to mid 2007, this company was part of the Mastervolt International Group of companies. The main reasons behind the creation of Hybrid Power Systems BV were: - A growing demand for more intelligent, HYBRID propulsion and power systems for super yachts and small commercial craft, but a gap in provision on the supply side. For example our Serial hybrid system with 2 x 200 kw Genverter generators 2 - The investments in WhisperPower s new product portfolio, with small hybrid type diesel generators as the main focus, made it feasible to develop similar systems for high power. - Key people with long experience in this market sector and similar products were available to start the development. - In 2010, Hybrid Power Systems obtained an order for two 40 metres J-Class sailing yachts from HJB, Holland Jachtbouw. This fact, together with grants obtained from the Dutch government and further investments from the owner of WhisperPower BV, Roel ter Heide, made it possible to start the development of the portfolio described below. Hy-Control: Your digital captain Introduction ACTUAL SITUATION & SYSTEM DESCRIPTION WhisperPower has been developing its range for two years and has proven its system concepts work according to design requirements. One system is in operation, the second will be installed shortly (all J Class applications). A third system is being prepared for a 45m sailing yacht (Royal Huisman) and demand is growing by the day. CONCLUSIONS - Design targets have been met, proof of concept succeeded. - Our Hybrid Power System is based on a DC droop natural regulation principle in which batteries are the back-bone of the systems. This is a simple but effective principle (no software involved), similar to low power inverter/ battery/ generator systems. - Our GENVERTER generators, based on Steyr engines, came out extremely compact and quiet. - Shore power, power generation, batteries, inverters and battery chargers work well together to power the PM electrical propulsion engines smoothly and quietly while AC power is supplied from the DC battery banks. Together with the Hy-Store LiFe PO4 Li-Ion batteries, the GENVERTERS are the backbone of the system, taking care of automatic power provision and charging of the batteries. The GENVERTER power generator utilizes variable speed PM generators designed by WhisperPower with turbo charged hi-speed engines, resulting in a low weight and a very small size. Our GENVERTER reduces emissions (NOX /SOX) and audible noise (outside AND inside). The battery pack takes over a silent AC power supply during low energy periods, for example during the night. Fuel consumption is reduced by up to 30%. The HYBRID PROPULSION FEATURE is optional and not required by all customers. OUR CORE COMPETENCES - We build excellent high-tech GENVERTER diesel generators, under Class, from kw power rating. - We add all the bells and whistles required by the customers (hydraulics etc). - We build excellent SHAFT generators, PM style, offering auxiliary power for sailing yachts or an additional power plant when navigating (motor yachts). - We integrate industrial power electronics, plus Li Ion batteries into our configurations. - We help customers work out the appropriate system for their needs (pre-engineering). - We manufacture, supply and commission. - We train technical crew (if needed, system is self-learning). - We take care of a worldwide on board service and warranty back up. The Power of Integration Our hybrid propulsion and power systems generate, store, use, exchange and control onboard energy in an independent and integrated way. The system can load balance peak periods by sharing the supply and energy from the storage. In off-peak periods the power sources are in optimal running mode and store any unused energy. A modular concept for power ratings from 50 kw 500 kw combines propulsion, manoeuvring, hydraulic functions and AC power. Smart Power Management Conventional systems are wasteful in many ways - the imbalance between night and day consumption means generator engines run often at a fraction of their nominal power. By applying variable speed generators together with system integrated inverters and batteries, our GENVERTER principle, significant space saving, weight saving, fuel saving and operational costs reduction will be achieved. Other benefits are the greater environmental friendliness and substantial audible noise reduction. The Power of Storage As well as low levels of noise and minimal vibrations, the option to turn off the generators and use batteries opens up a whole new range of benefits. The Hybrid Power function allows you to store your own energy, use it during peak periods and recharge during off-peak periods. It also provides back-up power in a blackout, protecting critical applications and systems. The Power of Customisation With over 15 years of experience in the world of superyachts, we understand the requirements of this specialised industry. Whether a refit or a new build, each project has distinctive requirements. 3

3 Portfolio overview Hybrid Power designs and manufactures bespoke solutions that exactly meet client needs. We serve the market for all recreational and small professional craft, sail and motor, with power requirements of 50 kw and up. Modular thinking The components of a Hybrid Power system are comprised of compact building blocks. Configured in a modular way, they offer you significant benefits in terms of space and flexibility. Our innovative integration philosophy also means more components in less boxes And further savings in space and weight. The Power of being prepared Hybrid Power offers a total one-stop shopping concept that makes the pre-engineering activities at the yard a great deal easier. You need have no concerns about finding appropriate partners for the various parts of your system: We are ready to serve you with all the parts you need, each prepared for plug-and-play installation. This also eliminates any possible weak links and again ensures you optimal safety. 4 Parallel Hybrid Maintains the mechanical connection between the engine and propeller shaft, with the electric motor acting on the drive shaft in parallel with the engine. The power split is a mechanical device that allows transfer of power between its connections. You can drive the propeller directly from the engine or from the electric motor, or from both. You can also disconnect the propeller for a stand-alone generator function. The engine is disconnected during regeneration. In a Serial Hybrid system the conventional diesel engine is replaced by an electrical motor. A battery bank is connected to the common electric power bus, which is connected to the motor. The electrical energy is either provided by variable speed power generators or by the battery bank. With large batteries you can have long periods of electric propulsion (and/or driving onboard electrical appliances) without resorting to the generator. HY-GEN GENVERTER Power generators kW are available, delivery time takes 40 weeks on average. The most used configuration is either a 6 cylinder / low rpm - 50kW version or a more compact 4 cylinder/ higher rpm / 50kW version. These units can be connected in parallel without any synchronization devices. (2, 3 or 4 in parallel). AC-DC converters for connecting to the main supply are part of the set-up. Hy-Control All system components are connnected to the overall power management system, which controls and monitors the entire system. This advanced automation system is configured according the yacht s requirements and fitted with a manual override to ensure redundancy. HY-STORE LiFe PO4 We offer lithium-ion phosphate batteries (EUROPEAN MADE), which can be stacked in a rack. The life expectation of these batteries at 100% DOD is at least cycles or 10 years under normal use. The DC-DC converters / battery chargers can be integrated with the battery system and are part of the set-up. Unique high efficient variable speed diesel generator kw output power rating (Genverter 50) - 4 or 6 cyl. diesel engine by choice - Fully watercooled PM technology RPM range - Extremely silent - Ultra compact and light weight (400 kg) - Fuel - and maintenance costs reduction - DC output for hybrid battery charging VAC / 50 Hz output by 3-phase inverter - 60 Hz also available HY-GEN SHAFT GENERATOR We supply 50 kw fly wheel integrated PM generators with clutch or generators to put in the drive train before the gearbox. An AC to DC converter for connecting to the main supply is part of the set-up. HY-SHORE POWER CONNECTION WITH THE FOLLOWING COMPONENTS: Isolation transformer vs. step-up transformer AC to AC. s to convert AC to DC for battery charging. You can use your electrical applications even with limited shore power. The Power of Clean HY-INVERT DC TO AC Static inverter (output 3 x 400V/ 5 Hz - or 208/400 /60Hz) - as the generator, providing AC power from the DC bus. The HY-SHORE and HY-INVERT parts of the system also function as the FREQUENCY CONVERTER: the boat can be plugged into any shore power voltage/ frequency in the world. This part of the system makes it possible to use HIGH POWER CONSUMERS even on a 30 or 60A electrical dock connection. All fossil fuels run dry, the price of powering super yachts will inevitably increase. But the real cost of burning vast amounts of diesel is to the environment 5

4 The Power of Hybrid in SuperSail World The launch of Rainbow caught a lot of attention from the super yacht industry. Many journalists have visited Holland Jachtbouw to see the project and interview the people involved. We were pleased to talk to them in our factory in Drachten, where we design, manufacture and test the hybrid systems and show them our demonstration systems. Here some articles which were published recently. The Power of Choice 6 The components of a Hybrid Power system are comprised of compact building blocks. Configured in a modular way, they offer you significant benefits in terms of space and flexibility. 7

5 The Power of Hybrid in The SuperYacht Report,668( -81( 7+( 683(5<$&+7 5(3257 (;3/25(56 /25(77$ $11( 5$,1%2: 7(&+12/2*<,1129$7,21 The Somewhere under the Rainbow Superyacht /,1/ ÊUÊ"* " ÊÊÊÊÊÊÊÊ ISSUE 134 JUNE 2012 "7 ÊUÊ -ÊÊÊÊÊÊ Ê 8*,/Ê 1-/,9Ê The Power of Parallel Hybrid Beneath the sleek teak decks of the newest J-Class yacht is a hybrid engine and power system that s taken the team at WhisperPower and Holland Jachtbouw years to develop then they had to fit it into a yacht that wasn t designed for engines. Don Hoyt Gorman goes below deck with some of the leading minds in marine hybrid power and comes up charged. 91 HYBRID POWER REPORT RAINBOW Holland Jachtbouw s Rainbow is a technological marvel, designed and built to the highest standards, intended to compete in the J-Class races and win. J ust outside Amsterdam, on the north side of the North Sea Canal, Holland Jachtbouw has been putting the finishing touches to Rainbow, the brand-new J-Class yacht based on the original 1934 William Starling Burgess design launched from Herreshoff yard in Bristol, Rhode Island. Rainbow is expected to be at the upcoming J-Class races in Falmouth, England, this summer, followed by races in the Solent and around the Isle of Wight in the Hundred Guinea Cup. It will be the first time in over three generations that a whole fleet of Js will race together, and the spectacle will be nothing short of breathtaking. For a certain kind of sailor and admirer this writer included Js represent the high watermark of sailing design. Subsequent advancements enabled evolved rigs and hull-forms after WWII which, sadly, rarely achieved the sublime visual impact of a pair of Js under full sail, canted hard over, thundering away to victory. RAINBOW S CREW GATHER THE JIB AFTER THE YACHT S HYBRID POWER SYSTEM HAS HOISTED THE SPINNAKER. REPORT EXPLORERS LORETTA ANNE RAINBOW TECHNOLOGY INNOVATION Page 41 Page 59 Page 91 Page 100 The burgeoning phenomenon of explorer yachts and whether their description reflects their vocation. 8 Built for a repeat owner, the third and largest yacht from Alloy Yachts to bear that name. The hybrid engine and power system of the newest J-Class yacht that s taken years of development. I n 2007, Holland Jachtbouw kicked off an internal project to consider hybrid power and propulsion. The project s youthful leader, Arjen Zijlmans, is a career marine engineer and technical director at the yard. On his travels around the world, he started to pick up bits and pieces batteries, DC busses, generators and tinkered with them after-hours with a small team at the yard to see what they could figure out. Only 15 per cent of the total installed power was being used over the course of the year on some of the yachts we examined, he said. That s incredibly inefficient. I just wanted to find a more clever way of providing energy. engine, between the motor and the ZF gearbox. The West Mekan controllable pitch propeller, if left in gear while the main engine is off, can turn the main engine PM and generate energy from the flow of water under the hull. The resistance of the prop when turning the PM costs about a knot and a half of speed, according to Zijlmans; and, of course, the Hy-Gen, battery pack or both can power the prop for quiet running at low speeds. The backbone of the system is the DC bus, which connects all components, aptly named the Hy-Grid. It connects the two battery banks and the two PM generators to the rest of the yacht s energy grid, including winch hydraulics for sail handling, air conditioning and bilge pumps, as well as shore power. The system is fed energy by both generators as needed, while the battery banks either accept energy for charging, or provide energy for boosts or silent running. The way the system is designed, there are no artefacts of big power changes coming on so no lights flickering when running the main winches, for instance. The system has two modes: shore power and Isle operation. All AC-required power is directed through two AC converters, one forward, one aft, with the aft one also handling the engine room. Given the limitations of shore power, the batteries provide power during peak loads (dinnertime, AC running throughout, lights, music, hairdryers and the like all on at once). If the batteries are low, the Hy-Gen generator kicks in (and the main engine could as well if the load was big enough). Starting from dead ship, the DC bus is pre-charged from shore power, batteries or gensets. The bus kicks in within seconds, as it senses 500 volts of DC current. When the batteries are down to 20 per cent charge, the system turns the genset on (if the main engine generator isn t already providing power to the grid) and speeds up to full power to charge the batteries as quickly as possible. The system always senses the yacht s electricity needs, and will adjust the speed of the generator to provide just the energy that s demanded. In situations where the electricity demand is actually higher than the grid is able to supply, the system shuts off power from the grid to low-priority systems in three groups. The first group is the galley, the second group is washing and drying, and the third ABOVE: WHISPERPOWER S HY-CONTROL USER INTERFACE PROVIDES A CLEAR OVERVIEW OF THE STATUS OF THE COMPLETE HYBRID POWER AND PROPULSION SYSTEM. OVERVIEW OF THE ENTIRE HYBRID SYSTEM SHOWING THE HY-GRID DC BUS AS THE GREEN LINE AT CENTRE, CONNECTING THE BATTERIES, GENERATORS, SHORE POWER, PUMPS AND AC CONVERTERS. OPERATION Part of the elegance of the system is its user interface design. Arjen s wife, Mirjam, is actually a graphic designer and helped to develop the icons that WhisperPower use for the system another nice cooperative example of how the teams came together. The interface is a touchscreen with elegantly simple icons and graphics that display operational status and controls for the generators, shore power, battery banks, as well as the usual main engine controls, tanks, bilges, fire systems and alarms. Focusing on new ideas and future thinking affecting all sectors of the industry. 92 Like the original, Holland Jachtbouw s Rainbow is a technological marvel, designed and built to the highest standards, intended to compete in the J-Class races and win. The original was built and launched in 100 days and had no engines whatsoever. The current iteration required two years to build and features race-optimised naval architecture by Dykstra and Partners, Southern Spars highmodulus carbon mast, boom and spinnaker pole, continuous carbon fibre rigging, 3Di racing sails and Lewmar high-speed hydraulic winches. Below decks, she s packing arguably the most advanced marine hybrid power and propulsion system afloat in a sailing yacht today. 97 9

6 Green Power System for mtr Yacht HYBRID POWER REPORT RAINBOW With the emergence of new lithium-ion batteries that are smaller, lighter and don t produce explosive gases when charging or discharging, the option to store excess energy and draw on it in a more effective way had become accessible. Zijlmans also wanted to build a generator that was independent of frequency, enabling the engine to run on the optimum speed to provide power to the yacht. Various companies around the world had spotted the opportunity that new battery systems and variable RPM generators could offer terrestrial clients and were working on a plethora of hybrid engineering solutions, including some of the biggest names in propulsion and engineering Siemens and BAE Systems. While they developed and rolled out hybrid city bus fleets worldwide not to mention Toyota s successful Prius line the yacht world considered its options and tinkered with ideas that would work for individual owner projects. A year into his testing and calculations, Zijlmans met with one of the leading Dutch minds in marine power, Roel J. ter Heide. Ter Heide, the entrepreneur and engineer who had started powerengineering firm Mastervolt, had recently spun out its generator arm as WhisperPower and, crucially, was looking at building a hybrid marine system for yachts. Holland Jachtbouw had developed a concept system for the (un-built) Hollander project, ter Heide explained, which we discussed with the owner who wanted to build Rainbow. The owner, who has a significant real estate concern, was integrating green thinking into his businesses, and understood the prestige of owning a forward-thinking hybrid system yacht. He really wanted to ensure that his yacht would have redundancies built in for power and services, Zijlmans explained. On most sail racing yachts, there s just the one engine, and if it fails, it s no fun. We spent a year trying to find commercial or military components to meet the Rainbow spec, ter Heide explained, but there were issues with Lloyd s classification and simple RAINBOW S TWO 40KWH LFP BATTERY BANKS HAVE 10 BATTERIES WITH V CELLS, PASSIVELY BALANCED (THEY GIVE OFF HEAT TO MAINTAIN AN EVEN STATE OF CHARGE). technical things that didn t work for us. So we went back to basics, built a business plan to achieve the targets and WhisperPower Hybrid Systems was born in WHISPERPOWER HYBRID Over a year and a half, WhisperPower developed the Hy-Gen system models, which can generate up to 200kW, the Hy-Grid distribution system, the Hy-Store storage system and the Hy-Control interface to monitor and run the system. We spent almost eight months on trial-and-error testing of military supplies and drew the conclusion that the only thing that was commercially available was industrial electronic inverters or converters. Water-cooled, bi-directional power conversion is available by the kilogram, but you have to programme it for your application. The rest of the components WhisperPower either designed and had manufactured or bought (batteries and engines for instance) and built into their very specific systems and specifications. Their key sub-contractors and suppliers were Combimac, Vacon and ADK. Their objective was simple: deliver a system that could provide silent, electric propulsion for an hour or more; could manage the hydraulic system for sailing entirely off the batteries so that no generators are running while under sail; and one that could charge the batteries while under sail (10kW max). It was also key to have silence at night, so a major investment was made in a substantial battery pack to cover this specification. THE 50KW HY-GEN FROM WHISPERPOWER, SHOWING THE PERMANENT-MAGNET (PM) IN GREY. IT WILL RUN AT 1,200-1,500RPM FOR SILENT RUNNING TO KEEP BATTERIES CHARGED OR UP TO 3,200RPM IN HIGHPOWER MODE. The drive train has five modes: 1. Propulsion from the Scania main engine, with energy pulled from the permanent-magnet (PM) generator. 2. Main engine propulsion without energy pulled from the PM generator reserved for high-speed cruising or if the PM motor isn t working kW of electric propulsion using only the PM motor, which provides seven to eight knots of speed. 4. Main engine running only to turn the PM as a back-up generator. 5. All off. There s also the regeneration power mode that uses the prop shaft to turn the PM generator while under sail, thus producing a small amount of energy for the grid at a cost of about 1.5 knots of sailing speed. Rainbow s system doesn t augment the powerful main engine with an electric motor boost, although Zijlmans commented that more efficient and powerful battery packs might make that an option for motoryachts in the future. The range of manufactured and packaged solutions that WhisperPower has developed for this project is now commercially available and actively DIAGRAM OF RAINBOW S 300KW SIXCYLINDER SCANIA MAIN ENGINE, FITTED WITH THE PM GENERATOR/MOTOR WITH OVERRUNNING CLUTCH AND A ZF GEARBOX COUPLED TO A WEST MEKAN CONTROLLABLE PITCH PROPELLER. DIAGRAM OF WHISPERPOWER S PERMANENT MAGNET GENERATOR WITH INTEGRATED OVERRUNNING CLUTCH, WHICH, WHEN ATTACHED TO THE PROPELLER SHAFT, CAN ALSO FUNCTION AS A MOTOR. IT IS LIQUID-COOLED AND WEIGHS 140KG. System Imperial System Imperial being marketed to superyachts. The next J-Class from Holland Jachtbouw not the J-8 Yankee, but another newly arrived at the yard after the client was impressed by the performance of Rainbow s installation will also use this system, while other Dutch yards are considering the technology as well. ON BOARD RAINBOW While the system itself is ingenious in concept especially after playing with it on the workbenches at WhisperPower s R&D lab in Drachten, North Holland walking on board Rainbow in Zaandam, it becomes quite clear how the installation presented a real problem, considering the classic J layout the yard had to work with. There will come a day, when, to fix one component, they ll need to pull five others out to reach it. 100kW generator power Li-Ion Battery 100A Shore Power Connection Green Power System for mtr Yacht You can t alter the lines of the boat it was challenging! Zijlmans says. Maintenance-wise, there are definitely lessons we ve learned with the installation on Rainbow. We re relying on equipment that doesn t require much maintenance. The enabling technology the high-end LiFePo4 (LFP) batteries robotically manufactured by European Batteries in Finland is basically invisible. They are fitted port and starboard in water- and air-tight compartments between the fresh-water tanks and the fuel oil tanks, with each side offering 40kWh of available energy enough to allow eight hours of silent operation overnight. Each individual battery cell is connected to a battery monitoring system (BMS) that senses charge and internal temperature. The BMS feeds into the helm-level monitoring and control system. 100kW generator power Li-Ion Battery 100A Shore Power Connection Shore connection ( VAC/100A) Hydraulic BUS DC BUSBAR VDC Variable Speed Generator (50kW@1500rpm) The whole engine room installation is built under Lloyd s survey with an unmanned machinery space (UMS) notation. It s manageable, but hardly a comfy workspace for an averagesized man. WhisperPower s 50kW Hy-Gen box sits aft and to port of the centreline. It s a white and green sound-isolating box containing the four-cylinder Steyr engine driving the PM generator bolted to one end. The owner ultimately settled on a parallel hybrid mechanism that maintains the mechanical connection between the engine and propeller shaft. It has the dual benefit of delivering either direct physical power to the prop shaft from the engine or fuel-efficient and silent propulsion in electrical mode. Frequency independent input Genverter 50 AC BUSBAR 400VAC / 50Hz Hotel Consumers Hy-Convert Hydraulic pump (65kW@2250rpm) HVAC System (Optional) Hy-Charge 40 kva Energy Storage Below the aluminium floor plates, there s another PM affixed to the six-cylinder 300kW Scania main Water treatment BMS Hy-Convert 50kW shaft generator (optional) Transformer (40kVA) Bi-Directional GRID: 260: 400 VAC SHORE: : VAC SHORE: : VAC Watermaker HYBRID POWER REPORT RAINBOW Variable Speed Generator (50kW@1500rpm) We were really excited to see whether the system was quick and stable enough to deal with these load steps generated by a team of 25 pros on deck pushing winch buttons! Happily, it did! TOP LEFT: ROEL J TER HEIDE, PRESIDENT, & MARTIJN FAVOT, CHIEF TECHNOLOGY OFFICER, OF WHISPERPOWER, AT THE BENCH-TESTING FACILITY IN DRACHTEN, NORTH HOLLAND, WHERE RAINBOW S SYSTEM WAS SET UP AND TRIALLED PRIOR TO INSTALLATION AT THE HOLLAND JACHTBOUW SHIPYARD IN ZANDAAM. TOP RIGHT: ARJEN ZIJLMANS, TECHNICAL DIRECTOR OF HOLLAND JACHTBOUW BOTTOM ROW: WHISPERPOWER S PRODUCT RANGE INCLUDES COMPONENTS FOR MARINE, MOBILE AND LAND-BASED POWER REQUIREMENTS. group is the water maker and sewage treatment. The system is constantly sensing the load and ensuring there is sufficient energy supply to keep the yacht powered up and operating safely and as quietly as possible. With racing mode enabled, the quietrunning Hy-Gen system will offer 50kW of boost power to the Lewmar high-speed winches when needed otherwise, racing is completely silent running off the batteries. Racing mode is a very important consideration for a J-Class. Energy-wise, it s also the most interesting, with space, sound and performance all in conflict. It can t be understated how complex the engineering here is. You have to programme all the parameters according to the specifications that you develop with the owner, crew and yard, ter Heide explained. Once the physical components are installed aboard, the programmers spend weeks and weeks programming and testing the system. It s a big part of the installation cost. This really is a decentralised system which allows a better use of space; it s reduced the volume and weight of the total installation by 35 per cent when compared to a similar requirement AC installation. It s robust, and manages small variations within the power supply. Genverter Various Systems Hy-Charge 40 kva Energy Storage SEA TRIALS After our visit, Rainbow proceeded with sea trials. We ve been finetuning the battery system, adjusting how it changes from supplying power to drawing power (discharging and charging), Zijlmans said. The most interesting thing was watching the peak loads on board during gybe manoeuvres. All of the hydraulics are powered through two huge 35kW electric motors. We ve had to make adjustments on the winches there will never be enough hydraulic power when all the race crew are pushing all buttons at the same time! Martijn Favot, chief technology officer for WhisperPower, commented that the the hydraulics worked smoothly on the Hy-Store Li ion battery pack. The genverter power sources, 50kW integrated with the main engine and the stand-alone variable speed 50kW genverter, are delivering the promised power silently and in a redundant way, he said. Power sharing between these power sources and the Hy-Gen battery via the high DC bus is functioning amazingly well. During sea trials, Luc Toepoel of WhisperPower stayed on board to oversee the system and worked with Rainbow s engineer, Terence Pretorius, who s learned quickly: the system turns out to be very simple to handle. Captain Nick Haley, who previously skippered two Holland Jachtbouw yachts, Windrose of Amsterdam and Athos, is keen on the instant access to power that they should have for sailing hydraulics, winches, etc. Modern sailing yachts with hydraulically powered deck winches and thrusters have always created a challenge when it comes to matching power availability with the expected loads, Haley said. For 95 per cent of a race, two Hydraulic pump (65kW@2250rpm) (Optional) Both Lloyd s Register and Cayman Islands flag state were key in advising on ensuring Rainbow s system is ready for future upgrades without compromising safety or operating issues. There are still some small cooling issues we have to solve, Zijlmans pointed out. These are basically driven by Class requirements on redundancy and easy maintenance as all equipment is built in very tight within the available space. 98 Hy-Convert generators and a main engine (if it has a power take-off) will be working on a very low load. On Rainbow, the crew should be able to match power availability to demand much more efficiently. The Hy-Gen can be run to charge the batteries while powering essentials, Haley pointed out. During high winch usage, when the electrical load peaks above what the generator can supply, the batteries switch instantaneously to discharge mode and fill the gap in the power demand. The initial trials have been promising and we hope to prove the system during the course of this summer. CONCLUSION If Rainbow makes her scheduled appointment in the Solent races this summer (Hanuman sadly pulled out of the races in late April), she ll be up against Endeavour, Velsheda, Ranger and Lionheart. She will be the only J able to race silently something her owner and crew alike will surely enjoy. It s taken almost 80 years to bring Rainbow back, and aficionados and bystanders alike will appreciate the effort. Such is the beauty of the Js, but it is what powers her insides that has truly complemented her traditional lines innovation, ingenuity and hard-won results. LEFT: RAINBOW BACK FROM HER SECOND DAY OF SEA TRIALS. ABOVE: A DECK BLOCK ON RAINBOW WITH A CERAMIC SHEAVE & STAINLESS-STEEL CHEEKS AND SHACKLE BEAT BLASTED TO ACHIEVE A TITANIUM LOOK. BMS Chiller Unit Household equipment Uni-Directional Transformer (40kVA) 260: 400 VAC s Entertainment Ships Heating If Rainbow makes her scheduled appointment in the Solent races this summer, she ll be up against Endeavour, Velsheda, Ranger and Lionheart. She will be the only J able to race silently... Electric driven Hydraulic pump (30kW) Non-essential Computers Liqyuid Cooled UPS Cooling System Images: Don Hoyt Gorman, Marloes van der Haagen & Holland Jachtbouw To comment on this article, issue134@superyachtreport.com with subject: Somewhere under the Rainbow 99 Hydraulic BUS Other AC consumers DC BUSBAR VDC AC BUSBAR 400VAC / 50Hz / 3 Ph + N 11

7 International Benelux United Kingdom Germany France Spain & Portugal America China Pacific green energy solutions Information and contact For more information and advice about WhisperPower products and services you can contact our local distributors and technical sales partners. For an up-to-date list of addresses and phone numbers go to Headoffice WhisperPower BV Kelvinlaan JB Drachten The Netherlands Tel: +31 (0) Fax: +31 (0) Sales international Tel: +31 (0) Technical support Tel: +31 (0) Service & Support Hotline (24/7) Tel: +31 (0) Fax: +31 (0) Sales Flyer A4 ThePowerofHybrid ENG green energy solutions