Abstract
Steam turbine shaft power performance and efficiencies depend on turbine size, type, and operating conditions. This work develops a new turbine performance model based on thermodynamic principles and semi-empirical equations to obtain general steam turbine performance estimation. Moreover, the basis of performance model and its relation to turbine efficiencies is analyzed to make clear how key operating and structural parameters affect the performance model. The new model has been validated against commercial steam turbine data and literature data and gives high accuracy for a wide range of steam turbines. The proposed model overcomes problems from previous models, which did not account for changes in steam mains pressures, and can be applied in utility system design, operational optimization, and system retrofit with complex multi-stage turbines allowing for changes in steam header conditions directly.
