. Electric railway journal . JO 50 40 60 60 70Tempero+ure Deg. F FIG. 2 — RELATIONBETWEEN MEANTEMPERATUREAND ENERGY CON-SUMPTION The total number of electrically heated cars at pres-ent is 697. These heaters consume from to per car, that is, approximately from 10 to 20per cent of the power required to move the car overthe road, and account for a portion of the increased 0 58 4-4 if S 2 5 2 5 0}cncncr>(7i (Do^cnoicn F16. 3 F16. 4 Fie. 5_ ~ FIG. 3—EFFECT OF MEAN ANNUAL TEMPERATURE ONAVERAGE KILOWATT-HOURS PER CAR-MILE. FIG. 4—INFLUENCE OF PASSENGER DENSITY ON POWER
. Electric railway journal . JO 50 40 60 60 70Tempero+ure Deg. F FIG. 2 — RELATIONBETWEEN MEANTEMPERATUREAND ENERGY CON-SUMPTION The total number of electrically heated cars at pres-ent is 697. These heaters consume from to per car, that is, approximately from 10 to 20per cent of the power required to move the car overthe road, and account for a portion of the increased 0 58 4-4 if S 2 5 2 5 0}cncncr>(7i (Do^cnoicn F16. 3 F16. 4 Fie. 5_ ~ FIG. 3—EFFECT OF MEAN ANNUAL TEMPERATURE ONAVERAGE KILOWATT-HOURS PER CAR-MILE. FIG. 4—INFLUENCE OF PASSENGER DENSITY ON POWER RE-QUIREMENTS. FIG. 5—EFFECT OF INCREASED SCHEDULESPEEDS ON ENERGY CONSUMPTION kilowatt-hours per car-mile each year, although ob-viously not all of it. A fifth factor affecting energy consumption has beenthe increase in schedule speeds. The increases aregraphically shown in Fig. 5. It will be noted thatthe increase in speed during 1914 as compared with TABLE II—TOTAL NUMBER OF CARS AND NUMBER OF NEW CARS . Closed Cars . • Open Cars . Total •— New —. Total .— New —Per Per Total Cars > >tal —New—•Per Year Number Number Cent Number Number Cent Numbi 1913 1665 39 2 34 490 2155 *914 1651 .25 433 2084 1915 1654 30 435 20 4 60 2089 1916 1704 70 4. 10 560 127 22 60 2264 1917 1792 100 5. 58 602 50 8 30 2395 392550197150 1811 21 . 706 20 960 Electric Railway Jou
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