Influence of Optimized Propulsive Efficiencies on Decarbonization of Ship Emission

In this study, a detailed overview of carbon (IV) Oxide (CO2) abatement potential through computer-based simulation of ship propulsive efficiencies and analyses with targets compatible with International Maritime Organization (IMO) long-term aim of keeping CO2 emission low and contribute to maintaining the earth’s surface temperature well below the catastrophic 2°C is presented. A tanker vessel-MT Diamond is selected as a case study. CO2 emission reduction studies on propulsion systems conducted by several researchers are hinged on economic and efficiency factors,’ route optimization, Engine-Propeller-Hull Matching (EPHM), trim, draft, and block coefficient optimization amongst others. As a result, credence in this direction of research is unavoidable and this research studied the correlation between ship CO2 emission and ship propulsive efficiencies. The computational models and simulation for this work were brought to bear utilizing codes scripted in MATLAB. The models developed were implemented in MATLAB2018a to simulate the characteristics of some propulsion system efficiencies. Cumulatively, the study revealed that the optimal ship effective power is 8.20kW at a ship speed of 13knot coupled with a 0.049s-1 decay constant, the ship CO2 emission level shows a commensurate improvement of 3.5% when the optimal overall ship propulsive efficiency is. 50.7% Simulation conducted to reproduce the propulsion system characteristics and analyzed results to affirm the validity of the mathematical models. Also, the propulsion system parametric performance improvement shows a corresponding improvement in ship CO2 emission level and specific fuel consumption (sfc).