Thermodynamic Performance Simulation and Modeling of Saturated Steam Turbines

Abstract

The thermal load performance optimization and control is an important means for performance analysis, control research and operation optimization of steam turbine. It has great significance for operator training, parameter adjustment and decision support. In saturated steam turbine, the rapid expansion of steam will lead to non-equilibrium two-phase condensation flow, and the model establishment is more complicated. In order to study the thermal characteristics of saturated steam turbine during load changing process, the non-equilibrium box model of two phase flow was used to simulate the process of vapor-liquid two phase flow in the saturated steam turbine cascade, analysed the energy and mass exchange process in cascade passage of saturated steam turbine, on the basis of these theories, a segemented lumped parameter model that could reflect parameter distribution between cascade passage of saturated steam turbine was established.