. The Street railway journal . NY. JOHNSTOWN, PA. Load Vacuum H. P. Auxiliaries Per Cent Total Power E. H. P. I. H. P. Inches,Hg.* Steam,I. H. P. Air,I. H. P ToWater,I. H. P. SteamCyl„Per Cent AirCvl.,Per Cent ToWater,Per Cent 220 5 2!) 457. 589. 4 7 * Referred to 30-in. barometer. Turbine indicated horse-powe
. The Street railway journal . NY. JOHNSTOWN, PA. Load Vacuum H. P. Auxiliaries Per Cent Total Power E. H. P. I. H. P. Inches,Hg.* Steam,I. H. P. Air,I. H. P ToWater,I. H. P. SteamCyl„Per Cent AirCvl.,Per Cent ToWater,Per Cent 220 5 2!) 457. 589. 4 7 * Referred to 30-in. barometer. Turbine indicated horse-power based uponno load losses, which are assumed approximately constant throughout thetest. Condenser—Weiss, 32-in. elevated jet, 800-kw capacity. Air pump-Weiss, single stage rotative type. Circulating pump—Bibus rotary and full load values estimated from data taken. Tests con-ducted and computed by companys consulting engineer. POWER CONSUMPTION OF AUXILIARIES,2000 TURBINE,LA. PURCHASE 1000 1500 Load 2000FIG. 11 ■SMO These results are shown graphically in Fig. 10, plotted to sta-tion load. Although observed in indicated horse-power, the re-sults were reduced to a basis of equality with turbine output inorder to obtain commensurate percentages. At less than % load,the total power consumption was less than 5 per cent of the stationoutput, and it progressively decreased to 2]/2 per cent at full the curves it may be inferred that at a load of 800 kw, whichis the full rating of the condenser, the power consumption willapproximate 2 per cent of the turbine output. And it must beborne in mind that even this percentage is not entirely chargeable,as all steam auxiliaries exhaust into an open feed-water heater in which the heat of the exhaust steam is regained. The upper curve in Fig. 10 expresses:Indicated horse-power input to horse-power output of turbines. Similar observations casually made on a 2000-kw
Size: 2179px × 1147px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
