| In order to discuss the feasibility of applying biodiesel to marine diesel engine, waste cooking oil biodiesel was mixed with diesel, and the test was carried out on marine diesel engine to investigate the effects of biodiesel on performance, emissions characteristic and combustion characteristic of marine diesel engine.The results showed that the high viscosity and low calorific value of the biodiesel mixture reduced the effective thermal efficiency and cause a slight increase in the fuel consumption rate. After burning the biodiesel mixture, the high oxygen content of biodiesel promoted complete combustion. Compared with diesel, carbon monoxide, carbon dioxide, sulfur dioxide and soot emissions were reduced by up to 17%, 5.1%, 41% and 36%, respectively.However, the excessively fast combustion rate of biodiesel increased the combustion temperature in the cylinder, and the high oxygen content promoted the emission of nitrogen oxides. The cylinder pressure of biodiesel was very close to that of diesel. Waste cooking oil biodiesel has good performance on performance, combustion characteristic and emissions characteristic of marine diesel engine, and it can be used as an alternative fuel to diesel for marine diesel engine. |
