摘要
国际海事组织(IMO)和各港口国对船舶能效提出了日益严苛的要求,基于余热回收的船舶能效提升是应对这一挑战的有效途径之一。TEG-ORC联合循环是一种可实现船舶多种余热梯级利用的新方法,但底循环比对联合循环系统性能的影响研究较少。优化了联合循环理论模型,开展了变底循环比对系统主要参数性能影响的实验研究。实验结果表明:在ORC底循环工质选择R245fa,工质质量流量为0.079 kg/s及蒸发压力为0.7 MPa的工况下,随着底循环比逐渐增加,系统输出功率和主机烟气余热利用率增加,而联合循环系统发电成本降低。在TEG/ORC底循环比为0.885时,主机烟气余热利用率85.07%,系统总输出功率688.4 W,系统热效率7.07%,联合循环系统发电成本3.338 CNY/kWh。
The International Maritime Organization(IMO)and port States have increasingly stringent requirements for ship energy efficiency,and the improvement of ship energy efficiency based on waste heat recovery is one of the most effective ways to meet this challenge.TEG-ORC combined cycle is a new method to realize the utilization of multiple waste heat steps in ships,but the effect of bottom cycle ratio on the performance of combined cycle system has not been studied in detail.The theoretical model is optimized and the infuence of variable bottom cycle ratio on the performance of the main parameters of the combined cycle system is studied experimentally.The experimental results show that under the conditions of ORC bottom cycle working medium R245fa,working medium mass fow rate m=0.079 kg/s and evaporation pressure P=0.7 MPa,with the gradual increase of bottom cycle ratio,the system output power and fue gas waste heat utilization rate of the main engine increase,and the cost of combined power generation decreases.When the bottom cycle ratio of TEG/ORC is 0.885,the fue gas waste heat utilization rate of the main engine is 85.07%,the total output power of the system is 688.4 W,the thermal efficiency of the system is 7.07%,and the power generation cost of the combined cycle system is 3.338 CNY/kWh.
作者
孙德平
乔广超
石飞雄
李怡然
仉大志
封星
柳长昕
SUN Deping;QIAO Guangchao;SHI Feixiong;LI Yiran;ZHANG Dazhi;FENG Xing;LIU Changxin(College of Marine Engineering,Dalian Maritime University,Dalian116026,China)
出处
《工程热物理学报》
北大核心
2025年第6期1738-1746,共9页
Journal of Engineering Thermophysics
基金
国家自然科学基金项目(No.52271357)。
