Model Empirik Estimasi Daya Mesin Penggerak Kapal Ferry Ro-Ro

Abstract

At the initial ship design stage, ship engine power estimation is usually based on the ship engine power coefficient approach. The ship's engine power is formulated as a function of the engine power coefficient with the ship's propulsion load. This research is intended to develop an empirical model for estimating the engine power of a small Ferry ro-ro ship. The empirical model is formulated based on the data from 66 Ferry ro-ro ships operated for ferry services in Indonesia. The ship length between perpendicular (L_BP (m), speed (V (knots), ship engine power (PME (HP)) of the sample ships, respectively, are 27.20 ≤ L_BP (m) ≤ 64.00; 8.00 ≤ V (knots) ≤ 15.80 and 480 ≤ PME ≤ 4000. In some references, the ship's engine power is formulated as the ratio between the ship's propulsion load with the engine power coefficient. The ship's propulsion load is expressed as a function of displacement (∆ (tonne) and ship speed (v (m/s) while the engine power coefficient known as the Admiralty coefficient (CA) is expressed as a function of ship length (L(m), and speed (V(m/s). In contrast to the referred references above, in this study, the engine power of the Ferry ro-ro ship is formulated as the product of the ship's propulsion load with the engine power coefficient. Ferry ro-ro ship's propulsion load is expressed as a function of displacement (∆ (tonne), ship length between perpendicular (L_BP )m), and speed (V (m/s). Further, the engine power coefficient is expressed as a function of length between perpendicular (L_BP (m), speed (V (m/s), the ratio between length between perpendicular and ship volume (L_BP/Ñ^1/3), and Froude number (Fn).