England, Italy and US Navy has operated and applied the electric propulsion system with an electric motor for the latest warship. In accordance with this trend, Korean Navy also actively seeks to apply the electric propulsion system ships to the warship.
This paper compares what the system more efficient between mechanical propulsion system, hybrid propulsion system(which uses mechanical propulsion system and electric propulsion system) and integrated power system, considering the maximum speed, electric power load, displacement.
As a result, efficiency of the electric propulsion system is decreased because warship needs undue propulsion power when warship need high maximum speed. The efficiency of the integrated power system increases when warship needs more electric power load increased. The efficiency of the electric propulsion system increases when warship has smaller displacement.
Considering only fuel consumption, CODLOG will be the most efficient propulsion system to LPH, DDH, LST, CODLAG will be the most efficient propulsion system to FF. And IPS will be the most efficient propulsion system to AOE.
The research will be needed to apply integrated power system on AOE and LPH which have relatively lower maximum speed compared with DDH and FF.