Improving ship energy efficiency by waste heat recovery: Case of turbocharger

Toughening requirements on reducing ship energy consumption and gas emissions raise the importance of the adoption of various energy-saving systems on marine engine and ship machinery design.Energy recovery from exhaust gases has a great potential considering the amount of mechanical or electrical work which could be generated onboard.This paper presents the study for the enhancement of the total energy efficiency of a vessel power-plant is developed by using a high-efficiency turbocharger. In this case, the study is focused on the Diesel operation mode of the engine to calculate the potential of energy that can be recovered from exhaust gas flow by the turbocharger.