FUEL CONSUMPTION AND AIR EMISSIONS' PREDICTION BY ENERGY FLOW MODELING ONBOARD SHIPS: APPLICATION ON A MODERN BULK CARRIER SHIP

摘要

Energy efficiency and air pollution prevention are the two main driving forces for future ship designs. A number of solutions for reducing fuel oil consumption and air emissions are presented in the paper and a possible ranking of energy saving measures and NO_x reduction measures is proposed. The challenge that is faced by designers today is to optimally combine some of these measures in order to obtain a fuel efficient and environmentally friendly ship. With this in mind, Bureau Veritas has developed a ship modeling platform (SEECAT) to effectively simulate the different energy systems (diesel engines, propulsion system, steam production, cooling system, waste heat recovery etc.) and the energy transformations shared between them (fuel, heat, steam, mechanical power). The simulation is performed in time domain according to a pre-selected operational profile allowing for real time monitoring of fuel consumption and of CO_2, NO_x and SO_x emissions. The methodology of component-oriented modeling is described in this paper and the energy model of a bulk carrier is presented. The results of comparative simulations for the given model are analyzed and the potential uses of energy flow simulation in the optimization of ship design are also discussed.