Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. . 1^3^5-6 7 <3 9 M/LL/Ory^ OF H/LOWATT H0UR3 GENERATED PE/i YEAH, Fig. 162. Curve Showing Per Cent of Total Cost of Fuel, Labor, and for GivenQuantity of Energy Generated Per Year ^* i c X Sm all. Belt Dm en L JmL I r 1 o . kk \ o. Small fiyriKjpeeScreenings form a hngir/i^60%
Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. . 1^3^5-6 7 <3 9 M/LL/Ory^ OF H/LOWATT H0UR3 GENERATED PE/i YEAH, Fig. 162. Curve Showing Per Cent of Total Cost of Fuel, Labor, and for GivenQuantity of Energy Generated Per Year ^* i c X Sm all. Belt Dm en L JmL I r 1 o . kk \ o. Small fiyriKjpeeScreenings form a hngir/i^60% of{ v5. 1, \ \ \ Si o oV O ^. \ V X X X ^^ X i c )® X • * . O f ^ 3 ^ S 6 7 a 9 y^/ii/o/Ys OF /iiLoumrT HOURS generated FER XFAR. Fig. 163. Curve Showing Relation of Coal Consumption to Quantity of Energy Generated energy generated. The value in the larger stations approaches 3pounds of coal per kw. hour, which is a reasonable figure. Fig. 164 283 186 ELECTRIC RAILWAYS gives an idea of the amount of labor required in small is great divergence of practice shown here but the pointsgive data for estimating the reasonableness of the number of men ina given plant. Z80. lOOO ^OOO 3000 -f-OOO 6000 OTAT/O/i ft/iT/N6 W /^ , . 900000 6 --. ^^ r X X ~-K- X ^5, X X 0 X X • X O f ^ 3 f- 5 e 7 3 9 M/LL/0/i3 OFH/LOtVATT HOUR3 6EDERATED PER YEAP.^ Fig. 165. Curve Showing the Total Cost per Kw. Hour Generated Fig. 165 is a chart of great interest because it shows that theoperating cost of energy bears a fairly systematic relation to thequantity generated. The cost seems to approach a value of one centper kw. hour. This is higher than is the rule in large plants, butappears not unreasonable in plants of the sizes indicated in Fig. 164. 284 ELECTRIC RAILWAYS 187 Load Factor. The load factor has an important bearing on thecost of electrical energy. By the term load factor is meant the ratioof the average load to the r
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