Author(s): Zhang Mingzhi, Yuan Hui, Guo Ting, School of Energy Power and Mechanical Engineering, North China Electric Power University
Pages: 12-16
Year: 2015 Issue:  2
Journal: Information on Electric Power
Keyword:  static blades of turbine; exergy transfer; pressure exergy potential field; exergy transfer coefficient;
Abstract: In order to have a deeper understanding on the gas flowing in the turbine stage pressure,speed and exergy transfer coefficient of variation,the pressure exergy tranfer model of water vapor that flow in turbine static blades is established in this article from characteristics of water vapor in the flow of the part of static blades in the turbine stage,based on the first and second law of thermodynamics and the theory of non-equilibrium thermodynamics. Also the computing methods of pressure exergy density,pressure exergy transfer coefficient are developed,and their variation trends along with the export cross-sectional area changing are included. The exergy transfer characteristics of static blades in steam turbine stage are analyzed from the view of exergy transfer,and it is provided the theory evidence for the pressure exergy transfer model with pressure exergy transfer potential field.