The Combustion and Emission Characteristics Study of Fishing Vessel Diesel Engines Using Diesel Blended with Animal Fat Biodiesel

In the trend of protecting the environment, finding clean energy for internal combustion engines, and minimizing dependence on petroleum fuel, many solutions have been proposed for implementation, including the development of biofuels. Because petroleum fuel is increasingly depleted and causes gravity environmental pollution, negatively affecting human health, the use of clean, renewable fuel as a fuel source to replace Petroleum has been researched and applied by countries around the world in industry and transportation. However, biofuels (biodiesel) are produced from various compounds derived from plants and animals, leading to differences in physical and chemical properties. As a result, each type of biodiesel has different origins, and when used for various engines, there will be changes in combustion and emission characteristics. The objective of the study is to apply diesel fuel blended with animal fat biodiesel (fish fat) as fuel for diesel engines of fishing vessels (without adding additives or adjusting the injection fuel system), contributing to reducing toxic emissions and encouraging the use of excess fish fat after food processing to produce biofuel. This study employed simulation and experimental methods to investigate the characteristics of Cummins NTA855 diesel engines using a blend of diesel fuel and fishfat biodiesel. Simulation results on Kiva-3V software show that when the engine uses B10 fuel (10% biodiesel B100 and 90% diesel) at a speed of 1,200-1,800 rpm, soot emissions are reduced by about 6.1-23.22% compared to diesel fuel. Experimental results showed that the engine using B10 at 1,200 rpm reduced soot emissions by 6.62% and reduced power by an insignificant (1.03%) compared to diesel fuel.