进汽参数变化对汽轮机热耗率影响的分析

摘要

The steam parameters of flow passage is one of the important parameters for steam turbine operation, its change has a great effect on turbine heat rate. On the basis of the unified physical model and mathematical model for thermal economy analysis of thermodynamic system,with taking a 660MW supercritical units for example,and using the calculation model of the effect of flow passage steam parameters on heat rate, the intensity coefficients of the effect of different steam parameters on heat rate under different conditions were worked out, the effect law of steam parameters on heat rate was analysed. It provided a basis for the guidance of actual operation and monitoring.%通流部分进汽参数是汽轮机运行的重要参数之一,它的变化对机组热耗率有很大的影响.以火电机组热经济性分析的统一物理模型和数学模型为基础,以某660MW超临界机组为例,利用通流部分进汽参数变化对机组热耗率影响的计算模型,计算了不同工况下不同进汽参数变化对机组热耗率影响的强度系数,分析了进汽参数变化对热耗率影响的规律,为指导机组实际运行和监督提供了依据.