Characteristics Analysis of Cargo Ship Propulsion System Based on SOFC-GT in Yangtze River Basin
In order to explore a new path for the clean utilization of diesel fuel in ship transportation,a ship propulsion system based on solid oxide fuel cell-gas turbine(SOFC-GT)hybrid power system is established.The effects of fuel air ratio,recirculation ratio,steam to carbon ratio and other parameters on the performance of the hybrid power system are studied in combination with the cracking and reforming of diesel and the safe operating boundary constraints of each component.The results show that the power of the SOFC-GT propulsion system is 2 458 kW,the fuel consumption is 0.092 kg/s,and the efficiency can reach 56.33％under rated working conditions.The anode recirculation can increase the efficiency of the system by 9.91％,but in order to avoid the SOFC operating temperature is too high,the recirculation ratio cannot exceed 0.45;when the change range of F/A ratio is 0.029 5-0.067 7,the change range of system power and efficiency is 460.6 kW-229.0 kW and 49.09％-56.41％,which can realize wide operating condition adjustment.The safe,adjustment range of water carbon ratio is 1.6-3.5,and the system power range and efficiency range are 1 007.0 kW-1 178.0 kW and 47.69％-56.82％,respectively.Compared with the traditional diesel engine,the cargo ship SOFC-GT propulsion system shows higher efficiency and endurance under different water speeds,wind speeds and sailing speeds in the Yangtze River basin,with a maximum increase of 15.5％.
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