THE “ELECTRIC” VESSEL

Electric propulsion, hybrid yachts, hybrid propulsion: there is often a lot of confusion about what these terms really mean. So let’s start from the beginning: what does hybrid, or rath- er hybrid propulsion, mean? In nature, “hybrid” refers to the product of two different species. If we speak of naval propulsion, hybrid means that there are dif- ferent ways of turning the propeller: an electric motor and a diesel engine are certainly the most widespread systems on board.


The same is true for hybrid cars, which have to engines, one electric and one petrol working in synergy. We define the degree of hy- bridisation on the basis of how and how much the two engines work together. When the two engines do not work together, the propulsion is defined as diesel electric: the generator (diesel en- gine) supplies the energy to drive the electric motor that turns the propeller. Both cases exploit the advantages of the high ef- ficiency of electric motors which guarantee yields of even more than 90%, have a maximum torque curve right from zero rpm, do not need transmissions and can easily work both as engines and as generators. On the other hand internal combustion engines certainly do not shine for efficiency, especially at some points of operation (low rpm) and their yield struggles to reach 35%.


By suitably combining these two kinds of engine and, in the case of hybrid propulsion, making them work together well, it is possible to reduce fuel consumption and, as a result, pollution emissions, and also have a series of advantages that increase Alberto amici, engineer with Auxilia Electric Propulsion: “The marine sector needs to clear up a great chaos of terminology” The Auxilia marine hybrid kit was awarded the “Seal of excellence” by the European Community the flexibility of the use of the vessel and improve the quality of life. But the systems used to combine the two systems and make them work together are different and, even more importantly, they are managed in different ways.


This makes it hard really to understand how a given hybrid system works and the confusion we mentioned above is created. To shed some light on the matter we spoke to the engineer Alberto Amici of Auxilia Electric Propul- sion, the RTN brand (the company has for 50 years designed and supplied propulsion systems for ships) which for 10 years has been involved in electric propulsion systems for ships and has been the creator of many of the most important hybrid and/or diesel electric applications for yachts large and small.

THE “ELECTRIC” VESSEL

THE “ELECTRIC” VESSEL

Leave review
Electric propulsion, hybrid yachts, hybrid propulsion: there is often a lot
Read More
CdM presents M/Y Aurelia 29

CdM presents M/Y Aurelia 29

Leave review
This new 40-metre steel/aluminium displacement yacht is equipped with 2 x R
Read More
CRN shipyard announces the sale of a new 52-metre full-aluminium Megayacht with 2 x REINTJES gearboxes type WAF 542L

CRN shipyard announces the sale of a new 52-meters full-aluminium Megayacht with 2 x REINTJES gearboxes type WAF 542L

Leave review
CRN, the historic shipyard and Ferretti Group brand, is delighted to announ
Read More
Auxilia Electric Propulsion and the Safety in Lithium Battery Systems

Auxilia Electric Propulsion and the Safety in Lithium Battery Systems

Leave review
Systems and tools are available which are fully capabl of handling these ri
Read More
A new Marine Hybrid Kit

A new Marine Hybrid Kit

Leave review
The new Marine Hybrid Kit, an auxiliary propulsion system for the diesel mo
Read More