Comparative analysis of power distribution, exergy losses and exergy efficiencies of the 200 MW steam turbine for three operating modes with and without turbine steam extraction

Abstract

The paper calculates the power, exergy losses and exergy efficiencies of the high, medium and low pressure steam turbine, as well as the total exergy losses and exergy efficiency of the 200 MW steam turbine. The calculation was performed for three modes of operation of the steam turbine with a load of 100%, 90% and 80%. For all three operating modes, the calculation of the analyzed parameters includes the operation of the steam turbine with and without turbine steam extraction. Based on the obtained results, a comparative analysis of steam turbine parameters was performed for all three operating modes and for operation with and without turbine steam extraction. Comparative analysis of the obtained results will show the influence of different operating modes of steam turbine with and without turbine steam removal on power, exergy losses and exergy efficiency of each module individually, but also on the total values of analyzed steam turbine parameters. The comparative analysis will also include the influence of mass steam flows from all turbine subtractions on the total steam turbine power losses for the three operating modes.

Keywords

• exergy efficiency
• losses
• power distribution
• steam extraction
• steam turbine