Arka Hybride systems
All Arka propulsion systems can be used as hybrids. Both serial hybrid where the power source can be either a battery or diesel driven generator or as Parallel hybrid where both an electric motor and or diesel engine drive the same propeller shaft. In the latter, it is possible to return excess energy produced by the diesel engine to the battery via the electric motor, which then acts as a generator, during navigation.
In serial hybrid systems, it is very important that the electric motor matches the generator and the power of its diesel. The characteristic of an electric motor is that it can react very quickly to power changes, this is not self-evident for the diesel that drives the generator and therefore very important that match. We are therefore happy to advise you on where the possible bottlenecks lie, if desired we can make an energy balance calculation for your application in advance.
Electric motor and diesel engines that drive the same propeller shaft are often different from each other in power and speed, so different power ratings may and can almost never be connected to each other one-to-one. This is often solved by installing a gearbox or belt transmission. If this transmission is delayed, it must be taken into account that the other way around, when sailing on the diesel, acceleration is achieved, so mechanically everything must be in order not to exceed specifications and the system does not work. It is therefore necessary to make a Hybrid comparison calculation in advance, it is then important to know the power, speed of the diesel engine and the deceleration ratio of the gearbox, if desired we can make a calculation of this in advance for your application.
With a Parallel Hybrid system, you have the advantages of a long range due to the diesel engine and the silence of the electric motor on board. An additional advantage is that you have an (extra) propulsion system immediately available when you need it.