In height or width
With an electrical driven rudder propeller the e-motor can be placed on the side of the top gear drive (Z-drive type), or at the top of the gear drive (L-drive type).
Decide how much you want to use
Interest in diesel electric and LNG electric propulsion has grown in immensely lately, with a view to fuel economy and reduced emissions. These are mostly ships with (diesel) electric propulsion and multiple generator sets on-board, which together provide the full electric propulsion power supply. When full power is not needed a few generators can be switched off to reduce fuel consumption.
Diesel/LNG electric propulsion is the ideal solution for ships that require large generators for other large consumers on-board, such as large cargo pumps or on-board electrical systems.
There are also disadvantages to (diesel/LNG) electric propulsion, however. The investment required is much higher than for diesel direct propulsion. In addition, the electrical components each has a loss of efficiency, which could total up to about 13%.
LNG as fuel
There is considerable international pressure on reducing the emissions from ships. LNG is safe, clean, economical and available. Burning LNG results in a significant reduction of harmful emissions, even without any treatment of exhaust gasses, including CO2 reduction as an extra benefit in relation to diesel with SCRT catalyst.
Fluid LNG is less inflammable than diesel (flash point diesel: 250°C, flash point LNG: 1.100°C), is lighter than air and hardly a healthy hazard.
Reduction LNG compared to diesel (CCNR2)
After a calamity, LNG causes no residual damage to the immediate area due to evaporation.
The world supply of gas is much bigger than oil.