COMPARISON OF THERMAL PERFORMANCE OF THREE SELECTED ENGINES FOR FUPRE MARINE CLASS ’23 BOAT

ABSTRACT This abstract examines the thermodynamics performance of a Yamaha 225HP Japanese American, Honda and Mercury diesel engine. It explores the efficiency and power output of this specific engines. By analyzing key factors such as combustion efficiency, heat transfer, fuel consumption and mainly thermal performance, of the engine, providing insights into its overall performance. Exhaust emissions, fuel usage, temperature, pressure, and other factors are among the many types of data that are collected for this study. Accurate models for the Yamaha 225HP Japanese American, Honda and Mercury outboard engine models are created by doing concurrent Computational Fluid Dynamics (CFD) simulations. By offering accurate insights into fluid dynamics, combustion processes, and heat transfer mechanisms, this two-pronged method improves the validation process. Through research, different fuel injection procedures, combustion chamber designs, heat recovery systems, and thermal examination are evaluated in order to investigate efficiency optimization options. In order to find the best configurations for various outboard engine types, research explores the trade-offs between fuel efficiency and power output. The efficiency of operation is also included in the research, with an emphasis on variables controlled by the operator and parameters set by the manufacturer that affect the amount of chemicals released into receiving waters. The fuel mixture, engine tune, operating speed, and recycling equipment are the main points of interest. The study's conclusion includes a discussion of how engine efficiency varies depending on things like motor size (horsepower rating), presenting data that refute preconceived notions and add important context for understanding emissions from outboard engines.