Development of Turbo Hydraulic System on Large Marine Diesel Engine
Under the situation that preventive effort to global warming is becoming more active in various fields, the reduction of CO2 from marine diesel engine is also required. The effective solutions for this challenge are reduction of fuel consumption by improvement of thermal efficiency, utilization of waste heat energy, and changeover to low-carbon fuel such as liquefied natural gas. Mitsui Engineering and Shipbuilding Co. Ltd. (MES) has developed Turbo Hydraulic System (THS), which is one of technologies of the utilization of waste heat energy (WHR). This THS makes it possible to recover the exhaust gas energy in the form of hydraulic power. In THS, excess energy of exhaust gas is recovered with hydraulic pumps in the form of hydraulic power, and the recovered power is supplied to a hydraulic motor connected to crankshaft for assist of driving the engine. Accordingly, the actual fuel consumption is reduced. The performance test of THS on MES test engine showed that the fuel oil consumption was reduced at maximum 4% without increasing NOx emission compared with original condition. THS has two type of the system. One type has four pumps, which are equipped to the turbo charger. Those pumps are connected to the turbo charger rotor shaft through a reduction gear. This type of THS is suitable for single turbo charger. The other type has pumps, connected to a power turbine, which is driven by energy of by-passed exhaust gas, instead of the above mentioned direct-driven pumps on the turbo charger. This type is more suitable for multiple turbochargers. Generally, hydraulic equipments are more compact than electric ones. In addition, main components of THS are integrated on an engine. Finally, THS is more compact and cheaper than conventional WHR system, utilizing electric equipments such as frequency converters and electric motors. Furthermore, we are planning to install THS system for in-service ship. The purposes are to confirm the reduction of fuel oil consumption as the propulsion system and the reliability and durability of THS system.
Nobuyuki Sakairi Ichiro Tanaka Morio Kondo Atsushi Otsuka Kazunori Ohta
Mitsui Engineering and Shipbuilding Co.,Ltd.,Japan
国际会议
上海
英文
1-7
2013-05-13（万方平台首次上网日期，不代表论文的发表时间）