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APPLIED TECHNOLOGY THE MARINE INDUSTRY LUXURY YACHT REFITTED USING FR-F800 INVERTER DRIVES


When the prestigious luxury yacht Sanssouci Star was refurbished to retain its classic feel, but to operate with super-modern high-tech equipment, no compromise was made on component quality. As a result, Mitsubishi Electric FR-F800 inverter drives were selected to provide an intelligent, reliable and energy efficient solution for the engine room HVAC system. The Sanssouci Star is one of few remaining, large ocean-going luxury


yachts that retain an air of period charm, but have benefitted from a full state-of-the art refit. Measuring 53.5m in length, with extensive teak decks and an English saloon that would not look out of place in a stately home, it is outfitted to the highest levels of luxury. Powered by two 1,267 horsepower diesel engines and able to travel


continuously for 20 days before refuelling, the Sanssouci Star can potentially take its passengers anywhere in the world. Since the yacht is a commercial vessel, offering charters for special events, such as weddings and receptions, as well as exclusive private outings and mini cruises, reliability is of the utmost importance to the owners, crew and passengers. Built in Germany in 1982, the Sanssouci Star has just undergone major


refurbishment, adding modern control equipment and upgraded systems. One of the key practical upgrades was to the heating, ventilation and air conditioning (HVAC) system for the engine room. For the optimum comfort of crew working in the engine room, the HVAC system now combines pressure and temperature control. A digital pressure sensor and an analogue temperature sensor both provide direct inputs to a Mitsubishi Electric FR-F840 HVAC drive. The first level of control for the engine room fan is provided by the differential pressure transmitter, which measures the difference in pressure between the engine room and the external environment. As standard the overpressure in the engine room is set to between 1mbar and 2mbar. When the overpressure in the engine room reaches this level, the system switches to temperature control. As the temperature rises, the speed of the fan is increased according to a curve set in the FR-F840. Full fan speed is achieved at 35°C. Different temperature modes can be selected on the drive’s front panel, as required. The Mitsubishi Electric FR-F800 series drives are specifically designed and optimised for HVAC applications, offering increased motor efficiency and


maximum energy savings. Embedded motor control algorithms optimise the motor voltage and current based on the desired load. The drive also includes energy monitoring capabilities, to capture and display actual energy usage. Further features include on-board preventative maintenance functions to reduce unplanned downtime, and an optional LCD display that provides accurate, time-stamped logging and real-time clock scheduling functions. With the new HVAC system installed in the engine room, the crew are now enjoying comfortable working conditions, wherever in the world the Sanssouci Star finds itself travelling. Mitsubishi Electric


MAINTENANCE


EXPERTISE ON SHOW AT SEAWORK 2017


Sulzer is returning to this year’s Seawork International exhibition, with a complete package of maintenance services that can be delivered through the company’s global network of service centres. Specialising in electrical and mechanical repairs, Sulzer offers expertise and high- quality repairs for all sizes of marine vessel. Sulzer engineers will be on Stand SR2, in the ship repair


pavilion. They will be available to explain the wide range of services available, including motor and generator repairs, pump maintenance, replacement coil manufacture and mechanical repairs, including white metal bearing manufacture. Seawork International is Europe’s largest commercial marine and workboat exhibition and this year’s event will be held from 13-15 June at the Mayflower Park in Southampton. Within the Pacific Green Hall, experts from Sulzer will be on hand to discuss any questions relating to marine maintenance, including the viability of onboard repairs. With extensive electrical and mechanical repair facilities, Sulzer can remanufacture or reverse engineer a wide range of components and return them with many years reliable service ahead. For larger pieces of equipment, such as electrical generators, Sulzer engineers can be deployed onboard to carry out both diagnostic and repair work. With a long history of rewinding motors and generators, Sulzer can also modify the coil design to provide improved reliability and productivity.


Sulzer www.sulzer.com


gb3a.mitsubishielectric.com


6 JUNE 2017 | DESIGN SOLUTIONS


/ DESIGNSOLUTIONS


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