. American engineer and railroad journal . Fi. 5.—Norwalk Belt-Driven Compressor. 180 AMERICAN ENGINEER, CAR BUILDER. Fig. Compressor for Carbonic Acid Gas. pressor having an intake capacity of 1,000 cubic feet per minute,for several different temperatures at the intake: Volnme discharged if Temperature of Volnme taken into measured at 62 degrees iDtake air. compressor. and atmospheric pressure. 0 cubic feet. 1,135 cubic feet. 32 1,000 1,060 62 1,000 to 1,000 975 80 1,000 966 90 1,000 949 100 932 UO 1,000 916 The above tabulated gains and losses are due to changes
. American engineer and railroad journal . Fi. 5.—Norwalk Belt-Driven Compressor. 180 AMERICAN ENGINEER, CAR BUILDER. Fig. Compressor for Carbonic Acid Gas. pressor having an intake capacity of 1,000 cubic feet per minute,for several different temperatures at the intake: Volnme discharged if Temperature of Volnme taken into measured at 62 degrees iDtake air. compressor. and atmospheric pressure. 0 cubic feet. 1,135 cubic feet. 32 1,000 1,060 62 1,000 to 1,000 975 80 1,000 966 90 1,000 949 100 932 UO 1,000 916 The above tabulated gains and losses are due to changes intemperature only and have no bearing whatever upon the powerneeded to work the compressor. The temperature of the intakeair does not change the power needed to operate the resulting efficiency is changed as above shown. In a compound or two-stage compressor the point at which thedischarge valves of the first cylinder should open is fixed by theratio between the cylinder volumes, and advantage is taken ofthL; fact to give such valves a positive motion. The valve mechanism on this cylinder of the Nor
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
