柴油机不同主机工况下水蒸气朗肯循环和有机工质朗肯循环性能对比
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摘要
为了充分利用柴油机的余热能量,根据余热分布特性设计了水蒸气朗肯循环系统和有机工质朗肯循环系统,用来回收柴油机排气能量、进气中空气冷却能量以及冷却系统的能量,并利用Aspen Plus软件对这两种循环系统进行流程模拟,比较水蒸气朗肯循环系统和有机工质朗肯循环系统在不同的柴油机主机工况下,这三种指标的变化曲线。结果表明这两种循环系统的净输出功率、热效率、热回收效率都随着柴油机主机工况的增大而增大;在相同的柴油机主机工况下,有机工质朗肯循环系统的净输出功率、热回收效率大于水蒸气朗肯循环系统,而有机工质朗肯循环系统热效率小于水蒸气朗肯循环系统。
In order to make full use of the waste heat of diesel engine power, according to the distribution characteristics of residual heat, a steam Rankine cycle system and an organic Rankine cycle system were designed, which were used to recover the exhaust energy of diesel engine, the cooling energy of air in intake and the energy of cooling system. The process simulation of the two cycle systems was carried out by Aspen Plus software to compare the variation curves of these three indexes of the steam Rankine cycle system and organic Rankine cycle system under different diesel engine operating conditions. The results showed that the net output power, thermal efficiency and heat recovery efficiency of the two kinds of cycle systems increased with the increase of diesel engine operating conditions; under the same diesel engine operating conditions, the net output power and heat recovery efficiency of organic Rankine cycle system were higher than that of steam Rankine cycle system, while the thermal efficiency of organic Rankine cycle system was lower than that of steam Rankine cycle system.
In order to make full use of the waste heat of diesel engine power, according to the distribution characteristics of residual heat, a steam Rankine cycle system and an organic Rankine cycle system were designed, which were used to recover the exhaust energy of diesel engine, the cooling energy of air in intake and the energy of cooling system. The process simulation of the two cycle systems was carried out by Aspen Plus software to compare the variation curves of these three indexes of the steam Rankine cycle system and organic Rankine cycle system under different diesel engine operating conditions. The results showed that the net output power, thermal efficiency and heat recovery efficiency of the two kinds of cycle systems increased with the increase of diesel engine operating conditions; under the same diesel engine operating conditions, the net output power and heat recovery efficiency of organic Rankine cycle system were higher than that of steam Rankine cycle system, while the thermal efficiency of organic Rankine cycle system was lower than that of steam Rankine cycle system.
引文
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[3] WARTSILA.Waste-heat-recovery[R].Wartsila 2011.
[4] ICHIKI Y,SHIRAISHI K,KANABOSHI T,et al.Development of super waste-heat recovery system for marine diesel engines[J].Proceedings of SPIE-The International Society for Optical Engineering,2004,195(2):2586-2591.
[5] 谢斌斌.船舶主机余热发电系统运行特性研究[D].哈尔滨:哈尔滨工程大学,2014.
[6] ICHIKI Y,SHIRAISHI K,KANABOSHI T,et al.Development of super waste-heat recovery system for marine diesel engines[J].Proceedings of SPIE-The International Society for Optical Engineering,2004,195(2):2586-2591.
[7] SONG J,SONG Y,GU C W.Thermodynamic analysis and performance optimization of an organic rankine cycle (ORC) waste heat recovery system for marine diesel engines[J].Energy,2015,82:976-985.
[8] 王明涛,方筝,刘启一.涡轮增压柴油机余热利用的有机郎肯循环烃类高温工质热力学分析[J].化工进展,2016,35(9):2721-2727.
[9] 杨富斌,董小瑞,王震,等.基于有机朗肯循环的车用柴油机排气余热回收系统性能分析[J].车用发动机,2015(1):33-38.
[10] NIELSEN R F,HAGLIND F,LARSEN U.Design and modeling of an advanced marine machinery system including waste heat recovery and removal of sulphur oxides[J].Energy Conversion & Management,2014,85(9):687-693.
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[12] LARSEN U,SIGTHORSSON O,HAGLIND F.A comparison of advanced heat recovery power cycles in a combined cycle for large ships[J].Energy,2014,74(5):260-268.
[13] 廖雷,余廷芳.双流体有机朗肯循环系统热力性能分析[J].热力发电,2016,45(6):46-50.