Steam turbines; a practical and theoretical treatise for engineers and students, including a discussion of the gas turbine . ell are not the same at the beginning and end of a test. Tem-peratures and pressures of the admission steam are determinedby mercury thermometers and pressure gauges located near themain throttle valve of the turbine; the amount of superheat isdetermined by subtracting from the actual steam temperatureafter making thermometer corrections the temperature ofsaturated steam corresponding to the pressure at the point wherethe temperature is measured. All gauges and thermomet
Steam turbines; a practical and theoretical treatise for engineers and students, including a discussion of the gas turbine . ell are not the same at the beginning and end of a test. Tem-peratures and pressures of the admission steam are determinedby mercury thermometers and pressure gauges located near themain throttle valve of the turbine; the amount of superheat isdetermined by subtracting from the actual steam temperatureafter making thermometer corrections the temperature ofsaturated steam corresponding to the pressure at the point wherethe temperature is measured. All gauges and thermometers arecalibrated before and after the test. Vacuum is measured directly at the turbine exhaust by meansof a mercury column with a barometer alongside for reducing thevacuum to standard barometer conditions (30 inches). By thislatter arrangement the necessity for temperature correctionswhich are necessary when the two mercury columns are not atthe same place is avoided. Fig. 188 shows a 5500-kilowatt Westinghouse-Parsons turbineset up for testing in the shops before shipment to the customer. TESTS OF STEAM TURBINES 357. 358 THE STEAM TURBINE The power is measured by means of a large water brake shown inthe figure at the left of the turbine. Reports of Tests. The tables given below have been preparedto show the steam consumption, together with the most impor-tant other data, of what are believed to be reliable tests ofstandard makes of steam turbines. The vacuum given in thetables is the equivalent referred to 30 inches barometer. Curtis Turbines. The following results were obtained in1905 by Messrs. Sargent and Lundy with a 2000-kilowatt Curtisturbine-generator. Kilowatts. Steam Pressure(Gauge). Superheat,Deg. F. Vacuum, Inches. Pounds perKilowatt-hour. 55510672024 204120207 28-5 Also the following results are reported in 1907 with a 9000-kilowatt turbine-generator in Chicago: Kilowatts. Steam Pressure(Gauge). Superheat,Deg. F. Vacuum,In
Size: 1192px × 2096px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyorkwiley, books
