CPP 추진 선박의 운전 모드에 따른 기관성능 및 배기배출물 특성에 관한 연구

Abstract

The engine performance and exhaust gas emissions of a ship equipped with a controllable pitch propeller and a medium-sized medium-speed diesel engine were compared according to the engine load in constant and combined mode. The cylinder pressure diagram, indicated mean effective pressure, specific fuel consumption, navigation distance to unit fuel consumption and air ratio were used to evaluate the engine performance and the emission rates of carbon dioxide, carbon monoxide, nitrogen oxides and smoke concentration were used to evaluate the exhaust gas emissions. According to the results, the engine performance and exhaust emission characteristics under a high load were similar in constant mode and combined mode. In the case of operating an engine under medium load, it was possible to reduce the fuel consumption and carbon dioxide emission rate by setting the operation mode of a controllable pitch propeller to the combined mode, but the emission rate of nitrogen oxides was slightly increased. It is thought that results of this study can provide the reference data that can reduce the carbon dioxide emission to prevent global warming and that can also improve the engine performance when selecting the operating mode of a controllable pitch propeller on the ship with a controllable pitch propeller equipment.