| 摘要 |
<p>A gas and steam turbine plant (1) has a waste heat steam generator (30) that is connected downstream of the gas turbine (2) on the flue gas side and that has its heating surfaces connected into the water-steam circuit (24) of the steam turbine (20), which has a number of pressure stages (20a, 20b, 20c). To achieve a very high degree of thermodynamic effectiveness in such a plant, the invention provides that a first pressure stage (20a) of the steam turbine (20) is connected on the steam output side to the steam inlet (60) of a second pressure stage (60) through a resuperheater (54) in the waste heat steam generator (30), a superheater (84) in the waste heat steam generator (30) being connected on the output side to the output (56) of the resuperheater (54) and to the steam inlet (60) of the second pressure stage (20b). In the operation of such a plant (1), steam released in the first pressure stage (20a) of the steam turbine (20) is resuperheated and mixed with the live steam (F') superheated in the superheater (84) for conveyance to the second pressure stage (20b) of the steam turbine (20). The resuperheated steam (D) and the superheated live steam (F') have the same temperature.</p> |
