. Official proceedings . % ^ 2:;; —~ ( ^ ._ ^ ^ \ —^- ::^^ :r= ^^ % 1 2^ 0 41 0 6t 0 LOAD IN i 10 qo_ IZ w_ 14 oo 16 W_ -i FIG. kw. Westinghouse Turbine Test, Condensing. Highly efficient operation has been obtained with the highspeed construction shown in Fig. 4, typical of the turbine built forthe City Electric Co., San Francisco. The machine operates lbs. per kw. hr. with 175 lbs. steam pressure, 100° superheatand 28 vacuum, as obtained on official test. Although with the smaller size turbines, the economy issomewhat less, it is nevertheless much better than reciprocat
. Official proceedings . % ^ 2:;; —~ ( ^ ._ ^ ^ \ —^- ::^^ :r= ^^ % 1 2^ 0 41 0 6t 0 LOAD IN i 10 qo_ IZ w_ 14 oo 16 W_ -i FIG. kw. Westinghouse Turbine Test, Condensing. Highly efficient operation has been obtained with the highspeed construction shown in Fig. 4, typical of the turbine built forthe City Electric Co., San Francisco. The machine operates lbs. per kw. hr. with 175 lbs. steam pressure, 100° superheatand 28 vacuum, as obtained on official test. Although with the smaller size turbines, the economy issomewhat less, it is nevertheless much better than reciprocatingengine performance. Official witness tests conducted on a 1000 kw. turbine fur-nished the government, is shown graphically in Fig. 11. \\hile the steam turbine has surpassed the reciprocating en- 344 Proceeclino-s Railway Club of PittsbuiErh. EFncENcy turbine 120Lbs. 6;£/iAf PressupeCc.^^Las Bach (GA)3° To 6°F Superheat (Witnessed) Mar hlACIIINE CCEast ,. FIG. 12. 630 k-vv. V/e££:e Turbine Test, Ncn-CcndenEing, 7 lbs. back Pressure. qinc in condensing work, this t\-pp of turbine, en the other hand,is net at a disadvantage for no: cudensing service. On demon-stration tests of a 6oo kw. turb^ne under conditions noted ( Fig12), the steam consum])tion excee ed the performance of a com-pound engine by an extremely small margin, and when the eco-nomic features of the turbine projx-r are considered, the balancewill favor this type of jMime mov* r, even for } Pressure Turbines: The low pressure turbine is an attractive means for in-creased occnomies in installations where the energv in steam
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