Maritime Propulsion

 

According to Wayne Jones, Chief Sales Officer of MAN Diesel & Turbo, “The new engine combines the best features of the current 48/60CR, such as MAN’s common-rail system with ECOMAP capability, and adds new technologies such as two-stage turbocharging for an unrivaled Specific Fuel Oil Consumption. The resultant reduction in operating expenses and positive environmental impact are sure to attract strong market interest.”

 

MAN Diesel & Turbo states that the 45/60CR’s power increase and low consumption are particularly aimed at such key, lifecycle-cost-oriented applications as cruise liners, RoPax ferries, RoRo vessels and dredgers. The company is making the 45/60CR engine available first as 12V and 14V versions with 6L to 10L variants to follow later. The manufacturer reports that the engine has been conceived from the beginning as a family concept that will accommodate future derivatives, for example, such as a dual-fuel derivative.

 

And for land-based power generation applications, MAN has developed the maximum power version, the 20V45/60 with 26 MW.

 

The first set of V-type engines will be available from end-2020 with delivery of the first L-type engines due from 2022.

 

“With this engine, innovative engineering meets the vast experience of a world market-leader in four-stroke engine design,” Jones added. “MAN’s 4x family has accumulated millions of operating hours all over the world and we have listened closely to the needs of our customers. Accordingly, we knew exactly where we wanted to go in engineering the next generation of this global success story: We were aiming for a game-changing level in power density and efficiency, and we accomplished that mission.”

 

Dr. Gunnar Stiesch, Head of Engineering Engines at MAN Diesel & Turbo, said, “Next to a frontloading approach, using thermodynamic engine process calculations, we used computational fluid dynamics to simulate and optimize the combustion process. Also, finite elements analysis was used to optimize the engine’s mechanical strength and vibration behavior. We then put the power unit to the test on the world’s largest, four-stroke, single-cylinder test engine and started the experimental optimization and validation phase.”

 

The new engine is also a new centerpiece of MAN’s extended systems approach which reflects in the company’s latest generation digital Safety and Control System, SaCoS 5000. Following a decentralized design concept, SaCoS 5000 offers unprecedented data availability and optimized alarm visualization and diagnosis. “Thanks to the new SaCoS, the MAN 45/60CR is not only online-ready but also equipped for the digital future of power generation,” Stiesch said.

 

The two-stage turbocharger module rounds off the MAN 45/60CR’s profile. MAN Diesel & Turbo is the pioneer in developing and operating two-stage turbocharging for large-bore engines, a concept which achieves excellent efficiency thanks to a low-pressure and a high-pressure turbocharger arranged in series. “We are the only company in the market that develops both engine and turbochargers,” Stiesch said. “This unique, in-house competence allows us to truly tailor-design this engine for optimized two-stage turbocharging and to unleash its full potential. It’s also noteworthy that, despite the turbocharging being two-stage, load pick-up behavior is the same as for the single-stage turbocharged 48/60CR engine. Operators thus profit from maximized peak pressure and optimal utilization of the Miller Cycle.”

 

As modern shipping faces constant demands to increase efficiency and comply with ever more stringent emissions regulations, the MAN V45/60CR engine enables owners and operators to meet such demands, while simultaneously optimizing operating expenses with unrivaled, low levels of fuel-consumption. Through increasing standardization and using modular sub-components, the new MAN V45/60CR engine also allows faster installation and easier maintenance.

 

The new four-stroke unit meets IMO Tier II, while IMO Tier III is met with MAN’s in-house, compact SCR system; the engine is shortly scheduled for approval by all major classification societies.

 

The 45/60CR is suitable for use in a wide range of marine applications, especially applications with high power-demands like ultra-modern cruise vessels, large RoPax and RoRo ferries, as well as mega-dredgers. Its primary focus is on reliable power generation, performance flexibility and superior efficiency in either diesel-electric or diesel-mechanical configurations.

 

Calculations, based on a representative load-profile of a cruise vessel, show that a ship operating with an MAN 45/60CR engine can enjoy a fuel-oil cost benefit of 5 to 12 percent, the manufacturer said. For a cruise vessel of around 120,000 – 150,000 gross tonnage with 60 – 65 MW of installed power and an assumed fuel price of 500 EUR/t, this translates into annual savings of 0.9 to 2.4m EUR when employing the 45/60CR.

 

The new engine combines the proven characteristics of its predecessor – the MAN 48/60CR – including its in-house common-rail injection system, with the latest innovations in diesel-engine technology such as two-stage turbocharging as previously mentioned here.

 

The MAN V45/60CR can also be combined with the MAN ECOMAP 2.0 technology that grants operators the flexibility to run an engine following different SFOC power characteristics, facilitating optimal efficiency at different load points. The latest development with this innovative technology is the integration of the MAN SCR system into ECOMAP, offering even further possibilities to optimize the efficiency of the propulsion system, taking into account fuel and urea prices.

 

This offers operators a whole new dimension of unrivalled operational flexibility, and completely new opportunities for optimal economic operation – regardless of prevailing consumable prices.