Model Development and Application of Axial Multi-Stage Steam Turbines

Abstract

This thesis provides a practical steam turbine isentropic efficiency model which could be used in chemical processes steam turbine network optimization. This model is established based on the classical turbine thermodynamic theory combined with semi-empirical formulations. It is enabled for an accurate prediction of the steam turbines isentropic efficiencies and embody the efficiency trends of realistic units in terms of their variation with capacity, load and operating conditions. Therefore, it could be used for the steam systems analysis and optimization in view of the operational strategy. The main purpose is, through using the model proposed, an efficiency improvement can be made by optimizing the steam system operation. A comparison between this new model and the traditional William’s line model which describe a function correlated the steam mass flow rate fluctuation and turbine performance is made, in order to verify the accuracy of this model. And case studies presented in the last chapter show a practical application of this model in the steam system optimization.

Date of Award	1 Aug 2017
Original language	English
Awarding Institution	The University of Manchester
Supervisor	Robin Smith (Supervisor) & Nan Zhang (Supervisor)