Patent ID: 6964167

Claim:
A steam power installation, comprising: a boiler for generating steam; at least one turbine; a condenser connected to the turbine on the steam outlet side of the turbine; a condensate line for feeding condensate from the condenser to the boiler; a preheating device connected in the condensate line for preheating the condensate, wherein a bypass line bypassing the preheating device is provided so that the preheating device only receives a first partial flow of the condensate and only the first partial flow is preheated; a branch line located downstream of the bypass line and connected to the bypass line such that during a low load operation of the turbine an amount of condensate flow is supplied to the preheating device; a diversion line connected in parallel with the preheating device such that the first partial flow is diverted directly to the boiler when the diversion line is activated and the diversion line is adapted to be activated by a shutoff fitting; and a bleed flow from the turbine supplied to the preheating device such that a power output of the turbine is controlled by the amount of bleed flow from the turbine.