Impact Of Swing Conditions On Turbine Design.

Abstract

Frequently, large swings in operating conditions are specified when purchasing turbines. Although the objective of these operating conditions may be to insure conservatism, they also may result in turbine designs which yield higher initial turbine and plant costs, and in higher operating costs. A handbook procedure for sizing a mechanical drive steam turbine is given which allows the turbine user to assess the impact of swing conditions on the turbine design. Extreme oversizing on the condensing section of extraction/induction turbines is a frequent occurrence; therefore, an example of this type is reviewed.