EPROX
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Catalog excerpts

Highly-Efficient Diesel-Electric Propulsion Lower fuel oil consumption, better performance Benefits of EPROX Variable speed gensets for extra efficiency Very low fuel oil consumption. Diesel engines run at a set speed defined by the control system according to the cur- spinning reserve. Peak loads can be managed without rent system load – maximising efficiency, minimising fuel oil consumption.  starting a standby genset.  Engines can operate at variable speeds: gensets run inde- 25 per cent smaller in comparison to classical diesel-elec- Engines’ ability to operate at a wide range of speeds ensures enhanced and robust dynamic response. EPROX plants comprise fewer components and require less space. The total footprint of a system of this type is up to pendently without needing to be synchronised.  The number of online engines is reduced by the electrical tric systems. This reduces installation costs.  In addition to buffering against load peaks, batteries can Energy storage sources, such as batteries or fuel cells, can act as the sole power source if they have sufficient capacity. be used to reduce transient loads on diesel and dual-fuel During periods of low load, full electric propulsion is pos- engines. In DP operation, this improves the propulsion system’s dynamic response, generating significant benefits.  Load peaks are shaved as power can be sourced from sible, with zero emissions.  Energy storage sources contribute to a reduction in diesel engine maintenance. energy storage devices. Load acceptance is diverted away from the engines. In today’s world, fuel-saving propulsion systems are a must, and that requires new propulsion plant without sacrificing performance? Energy storage devices – offering flexibility and performance Variable speed gensets cut fuel oil consumption The new EPROX energy-efficient diesel-elec - It is often beneficial to run gensets on high loads, using sumption. Dependent on the current load, the control tric propulsion system boasts a host of key surplus power to charge batteries. If less energy is system can set the speed for optimum SFOC. design elements, such as the latest DC distri- and innovative solutions. But is it possible to design a highly-efficient diesel-electric Variable speed diesel engines combined with DC technology Single line diagram of a EPROX system for a PSV. The system is available up to a total installed power of 20 MW. required, one genset can be shut down, with the Variable speed diesel engines minimise fuel oil con- bution and circuit breakers, and the intelli ent g remaining gensets running again at high load, sup- A renaissance in direct current arrangement of rectifiers and inverters. What’s For many years, electric propulsion plants employed EPROX is the new fuel-efficient diesel-electric propulsion more, heavy components such as supply alternating current (AC) distribution systems. AC sys- system from MAN Diesel & Turbo, developed in partner transformers have been removed. This inno - tems were long regarded as the best solution, and a ship with leading e-suppliers. Efficient propulsion plants vative equipment was developed by leading large number of diesel-electric vessels with AC sys- with integrated energy storage sources are now a reality e-suppliers such as ABB and Siemens. tems and variable speed drives were built, for diverse due to advances in DC distribution technology. This de- MAN Diesel & Turbo is cooperating with these purposes. But times are changing, thanks to new direct couples some of the load applications on the propeller key players to provide a fully-optimised sys- current (DC) components and an innovative engine from the diesel engine, reducing peak loads, and tem. The result is a best-in-class propulsion control philosophy Diesel-electric propulsion has making the entire propulsion plant more responsive system that combines innovative electrical evolved, creating a much more compact solution with and dynamic. When powered solely by electricity from technology with industry-leading diesel and a range of potential applications. storage sources, the system produces zero emissions. dual-fuel engines. Typical SFOC map: four stroke diesel engine Engine Power [%] Battery discharge Battery charge Battery discharge 80 Fuel Consumption [g/kWh] System load Engine Speed [%] EPROX – Energy-saving electric propulsion system EPROX – Energy-saving electric propulsion system EPROX – Energy

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All data provided in this document is non-binding. This data serves informational purposes only and is especially not guaranteed in any way. Depending on the subsequent specific individual projects, the relevant data may be subject to changes and will be assessed and determined individually for each project. This will depend on the particular characteristics of each individual project, especially specific site and operational conditions. Copyright © MAN Diesel & Turbo. D2366508EN-N2 Printed in Germany GGKM-AUG-07151 EPROXEnergy-saving electric propulsion system Platform supply vessel, DP 2...

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