First Commercial Supercritical-Pressure Steam-Electric Generating Unit for Philo Plant

The commercial success of higher pressures, higher temperatures, reheat, larger units, and single-boiler, single-turbine unit designs has given customers of the utility industry cheap electric power. The Philo project reflects efforts to continue this trend by opening up new avenues of approach. The engineering, design, manufacturing, construction, and operating experience on the 120,000-kw steam-electric generating unit operating at 4500 psi, 1150 F initial temperature with double reheat (first, at 1050 F and, second, at 1000 F) should provide the know-how to create units of still greater economy within the next decade.