Estudio técnico-económico de la remotorización de un buque atunero de 40 metros

Abstract

The Ecuadorian tuna fleet has been operating for over 40 years with the same propulsion system, reducing its efficiency and competitiveness. This study evaluates the re-motorization of a 38-meter vessel to determine the most efficient propulsion system and the profitability of the investment. Based on the characteristics of the vessel and the requirements of the shipowner, the total resistance and the necessary power were calculated, selecting an optimal engine-propeller assembly that allows for one additional fishing operation per year. Through comparative cash flow, based on the company's income and operational costs, the profitability indicators were analyzed. It is estimated that the current propeller does not take advantage of the maximum power, so a 1.9-meter diameter and 1.44-meter pitch propeller were selected. The financial analysis confirmed that the investment is profitable, with an IRR of 34.82% and a payback period of less than three years, even in pessimistic scenarios it does not exceed four years. However, improper propulsion system design, such as poor propeller selection, could lead to engine overheating, increasing maintenance costs and downtime. Keywords: Propulsion System, Installed Power, Propeller Performance, Investment, Profitability.