F204 ENERGY LOSS AND CONSUMPTION DEVIATION ANALYSIS OF 1000MW ULTRA SUPER CRITICAL STEAM TURBINE UNIT ON OFF-DESIGN CONDITION(Steam Turbine-2)

Abstract

In this paper, the operating economy of the 1000MW USC (Ultra Super Critical) steam turbine unit is studied by the energy loss and heat consumption deviation analysis. The heat economy calculation model is built by using the conventional heat balance method and the equivalent enthalpy drop method, and the key parameters on off-design condition are determined, which ensure the accuracy of the results of the energy loss and heat consumption deviation analysis. For some special conditions which are not suitable for the equivalent enthalpy drop method, the off-design condition calculation of the steam turbine and its thermal system is adopted.