Figure 5.

Diagram of the thermal cycle of a 900-MW unit. With feed pump driven by extraction-backpressure turbine: the idea of the MC. B, boiler; HP, high-pressure turbine; IP, immediate-pressure turbine; LP, low-pressure turbine; HPH3, HPH2 and HPH1, high-pressure feed water heaters; FWP, feed water pump; FWT, feed water tank + deaerator; LPH4, LPH3, LPH2 and LPH1, low-pressure feed water heaters; COND, condenser