. The street railway review . e sensitive, and the economy of the motor atlight loads improved, by superimposing a reciprocatingmotion to the position of the rela)- valve, the action being toeliminate friction and stop hunting, as well as to admit thesteam in blasts at full pressure, and of larger or shorterduration, according to the work required from the some cases the solenoid has been replaced by a centrifu-gal governor of ordinary type. The first compound steam turbine direct connected to adynamo was built in 1SS4 ; it ran at iS,ooo r. p. m. and gave6 electrical h. p. Within the
. The street railway review . e sensitive, and the economy of the motor atlight loads improved, by superimposing a reciprocatingmotion to the position of the rela)- valve, the action being toeliminate friction and stop hunting, as well as to admit thesteam in blasts at full pressure, and of larger or shorterduration, according to the work required from the some cases the solenoid has been replaced by a centrifu-gal governor of ordinary type. The first compound steam turbine direct connected to adynamo was built in 1SS4 ; it ran at iS,ooo r. p. m. and gave6 electrical h. p. Within the last five years turbines devel-oping from 500 to 700 h. p. have been installed. At presentthere are 30,000 h. p. of turbines in England. Fig. 4 is reproduced from the Electrical Engineer, Lon-don, and shows one of four units in use at the HotelCecil, London. It is a 75-U. vv. Parsons parallel flow tur-bined direct connected to a 75-k. w. direct current are •55 rows of l)lades and the speed is |,<500 r. p. FK;. I -75-K. W. UNIT IAKSON S STEAM TUKIilNK. The supply of steam is not continuous but an impulse is<iven once in 21 revolutions. For the month of April,1S97, the output of the station was ^SjO)^ kilowatt-hourswitli a load factor of .395 ; the costs are itemized as follows : Coal ( per ton) cents. Water ri8 Oil and waste 106 Wages 7recialion Total , It should be stated that the average cost per kilowatt-hour for repairs and maintenance for the six months prece-ding was but .130 cent. The units or kilowatt-hours arethose used, not those generated. Fig. 5 shows the consumption of a 200-k. w. turbo-gener-ator, 1,000 amperes at 200 volts; the turbine is a Parsonsparallel How. The latest field entered by the steam turbine is that ofmarine propulsion and the results obtained are extremely \\ per Jour].-} , . l^ \ \ , ^ \ / ^ ,^ \ V^ ^ .-■ \^ < r-^ R. ^. -- \ ^ •— ^ -
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
