基于朗肯热力循环模型修正的热电厂热耗改进分析与实践  

Analysis and Practice of Heat Rate Improvement in Thermal Power Plants Based on Rankine Thermal Cycle Model Correction

作　　者：王军[1,2] 张超群 戴洪刚 钟先觉 王磊 WANG Jun;ZHANG Chao-qun;DAI Hong-gang;ZHONG Xian-jue;WANG Lei(Tianjin University,Tianjin 300072,China;China General Nuclear Energy International Holdings Co.,Ltd.,Shenzhen 518000,China)

机构地区：[1]天津大学,天津300072 [2]中国广核能源国际控股有限公司,深圳518000

出　　处：《汽轮机技术》2024年第3期217-220,共4页Turbine Technology

摘　　要：朗肯循环是热力发电厂的典型热力循环之一,主要包括等熵压缩、等压加热、等熵膨胀以及等压冷凝4个热力过程。在分析朗肯循环的基础上,结合实际工程案例,对4个热力过程进行优化和修正,提高了发电厂朗肯循环的效率,并结合《ASME PTC46电厂整体性能试验标准》,运用简单的Excel软件开发了机组效率分析软件,对发电厂蒸汽循环过程进行了详细的分析诊断,找出机组效率折损点以及优化提升方向。通过检修工作逐一落实热耗改进方案,实现了机组高效运行,节省热耗支出约2263万美元。Rankine cycle is one of the typical thermal cycles in thermal power plants,which mainly includes four thermal processes:isentropic compression,isobaric heating,isentropic expansion,and isobaric condensation.On the basis of analyzing the Rankine cycle and combining with practical engineering cases,this article optimizes and corrects four thermal processes to improve the efficiency of the Rankine cycle in power plants.In combination with the"ASME PTC46 Overall Plant Performance Test Codes",thermal efficiency analysis software is developed using Excel software to conduct detailed analysis and diagnosis of the steam cycle process in power plants,identify the points of unit efficiency loss and the direction of optimization and improvement.Through maintenance work,the heat rate improvement plan was implemented one by one,achieving efficient operation of the unit and saving approximately$22.63 million in heat rate expenses.

关 键 词：朗肯循环 等熵压缩 等压加热 等熵膨胀 等压冷凝 热耗改进 

分 类 号：TK114[动力工程及工程热物理—热能工程]