Patent ID: 7258724
Filing Date: 2007-08-21
Classification: F01K,Y02E

Abstract:
1. A method for separating residual gases and working fluid in a combined cycle water/steam process, wherein steam, used as a working fluid, is subjected to multi-stage compression and a mixture of the working fluid and reaction products of liquid and/or gaseous fuels is subjected to multi-stage expansion, and wherein an energy supply in fuel form is effected directly before or at a blading of selected turbine stages, the method which comprises: subjecting an expanded exhaust gas from a high-pressure turbine stage to a cooling process prior to further compression, and thereby cooling the expanded exhaust gas from the high-pressure turbine stage at least to a condensation temperature of a steam contained in the exhaust gas; carrying off uncondensed parts of the exhaust gas from the combined cycle water/steam process; and carrying out a condensation of the working fluid, leading-off of uncondensed residual gases, expansion of a working fluid condensate, and evaporation of the condensed working fluid in a residual gas separator connected upstream of a multi-stage turbocompressor and a low-pressure turbine stage.