Patent ID: 8695345
Filing Date: 2014-04-15
Classification: F01K

Abstract:
1. A calculation method for calculating an amount of moisture loss in a steam turbine generated when a steam condition in the steam turbine becomes wet steam, the moisture loss comprising loss elements including (1) supersaturation loss generated when steam expands so as to supersaturate at a blade cascade, (2) condensation loss generated when steam around water droplets condenses, (3) acceleration loss generated due to a difference in velocity between water droplets and steam, (4) braking loss generated when water droplets collide against suction sides of rotor blades, (5) capture loss generated when water droplets collide against surfaces of stationary and rotor blades, and (6) pumping loss generated when water droplets adhere to the surfaces of the rotor blades, wherein a computer is configured to store information to permit selection from among the loss elements on a basis of a calculated wetness fraction, the calculation method comprising: