2020-1-1 · To reduce this temperature, the low-temperature enthalpy of exhaust gases extracted at the exhaust from a gas turbine in a gas-steam system is used in a heat recovery steam generator for the production of steam applied to feed the steam turbine and for pre-heating condensate from condenser in a steam turbine. This takes place in a low-pressure regenerative heat exchanger integrated in the final stage of heat recovery steam generator.