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Optimising a submarine power plant by implementing a PEM fuel cell and a PMSM in a first principle model

Optimising a submarine power plant by implementing a PEM fuel cell and a PMSM in a first principle model
December 2019 - A naval submarine sails in different operational modes: surfaced, at periscope depth or submerged. It needs an appropriate power plant to do so. The impact of the selected power plant on the overall submarine design is significant. Thus, selecting the right components of the power plant at an early stage is key to a successful design. In Nevesbu’s research to optimise a submarine power plant, a mean value first...

A new method for hydro-structural ship analysis

A new method for hydro-structural ship analysis
November 2019 - “Coupling between hydrodynamics and structural analysis is what makes this method so unique”, says Ana Maria Tocu, Lead Naval Architect at Nevesbu. “We have developed a method for mapping the response of ships and offshore structures with direct link to the FE (Finite Element) analysis, in order to accurately account for specific environmental conditions. It goes without saying, that once a marine...

HNLMS Rotterdam again ready for active service following intensive renovation

HNLMS Rotterdam again ready for active service following intensive renovation
July 2019 - On Tuesday 9 July, the HNLMS Rotterdam undertook its first sea trial following intensive renovation. After 20 years of active service, various mission systems were due for an upgrade or total replacement. The replacement of various so-called SEWACO systems (Sensors, Weapons and Communication) and a complete renovation of the command centre from which amphibious operations are conducted are included in the maintenance and...

Why assessing low probabilities of failure by extrapolation could be required

Why assessing low probabilities of failure by extrapolation could be required
June 2019 - “Calculating the Probability of Failure (PoF) may fail when this value is very low”, explains Jack Reijmers, Specialist Engineer at Nevesbu. The Probability of Failure is the probability that the loading exceeds the load carrying capability or resistance. A safe structure implies a low PoF. However, sometimes the PoF is too low to calculate. The analysis produces a distribution of probabilities, but failure lies...

The performance of full electric battery/fuel cell powered submarines compared to conventional submarines

The performance of full electric battery/fuel cell powered submarines compared to conventional submarines
April 2019 - Both fuel cells and batteries are considered the solution to achieve emission free transport in multiple civil industries. The undersea defense industry can profit from this, since both technologies are applied in submarine designs.  However, will it also be possible to move from a hybrid power plant to a full electric power plant? And what are (with respect to the performance) the essential differences, advantages and...
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