Repowering on KMP. TRIMAS ELLISA to Obtain the Optimal Propulsion System

Abstract

The working optimization of this ship is also closely related to the driving factor of the working ships, commonly referred to in the shipping world as a ship propulsion system. The propulsion system explains how the depat ships move well under existing shipping conditions in order to meet existing needs. KMP. TRIMAS ELLISA is one of the passenger ships that serve inter-island passenger transportation. Based on Ministry of Transportation Regulation 104 year 2017 states that Ferry Transportation Ship is a Crossing Motor Vessel (KMP) which is a mechanically powered water vehicle, serves as a moving bridge to transport passengers and vehicles along with their cargo that goes in and out through different ramps, has double bottom construction and has at least 2 (two) main engines. Based on its regulation, KMP. TRIMAS ELLISA must be repowered by replacing it with a double machine. Changes in the propulsion system using twin screw resulted in a change in propulsion size dimension to 2.68 m. This change to support main engine that is already available. The larger the diameter of the propeller the greater the efficiency, so also if the greater the ratio of the discus (blade area ratio) propeller efficiency will increase as well.