Relative “Engine Efficiencies” Realizable from Large Modern Steam-Turbine-Generator Units

This paper analyzes the results of tests on more than 100 turbines under station operating conditions. The progress in turbine efficiency made over the last 20 years is shown and the analysis of the test results is carried out in such a way as to permit working out a system for predicting relative turbine performance. This method is given in detail and will permit the prediction of relative turbine performance for large condensing and noncondensing machines over a wide range of conditions.