Estimation of exhaust steam enthalpy and steam wetness fraction for steam turbines based on data reconciliation with characteristic constraints

摘要: Abstract Wetness fraction of exhaust steam is important to the economy and safety turbines. Due lack commercially available measurement technologies, it usually obtained from model based calculation via other measurements. However, accuracy relevant data unsatisfactory due limits measuring instruments, reconciliation can be applied improve these Traditionally, balance constraints turbines are mostly considered in reconciliation, results previous studies illustrate that there still potential for further improvement. In this work, we present a generalized approach with both characteristic estimation wet parameters turbines, case on real-life 1000 MW coal-fired power plant. Results show uncertainty reduction enhanced all Better estimates enthalpy wetness therefore after reconciliation.