ABB GT24 36 CCGT plant


The latest ABB GT24/36 CCGT plant ([16], see also Ref. [1] for a brief description) employs reheating between the HP and LP turbines and a relatively high pressure ratio of 30. There are two thermodynamic features of this type of design. Firstly, the expansion through the larger pressure ratio, but taken in separate HP and LP turbines with reheating between them, means that the temperature leaving the LP turbine is not increased substantially in comparison with non-reheated plants (about 600°C, cf. 530-500°C) and secondly that the pressure ratio for maximum (t7o)cp becomes closer to that for the maximum efficiency in the higher plant alone.  [c.128]


Advanced gas turbine cycles (2003) -- [ c.128 ]