What a Mere Light Switch Will Mean for Her I
Marvels' of Riverside Power Making pounds of water into steam. At the harmal steam pressure and temperature approximately 13 Ibs. weight of steam are required to generate one unit, or kilowatt hour, and, this quantity' of steam requires lo more than 1.7 Ths, of coal By A Stave 1 have visited (he Power Plant of the Municipal Hlectrieity Department -of Shanghai, and from now on greatly fear that I shall never feel entirely & free agent again when I reopend to the automat Impulse of pressing a button illumine a room, Much too much is now involved in that unassuming procedure. Now I know. But at ext T can puly hope that time, with softening wisdom, will lighten the awful load of knowledge, and that an electric switch will be only an electric switch once At the present writing it is a host of imposing things resides an electri switch, Tt ix the magi ach unit generated. The clecthe Bois clu Bologne, but the tra lly inclined will recognize the efficiency involved in, these figures. the visitor is told, puffs away moving the endless hes which all A Bit Above Summer Heat those piles of coal will eventually ly when the steam is xenerat-
'The ans ON seed "Was, Wa sre it leaves 200 Ibs, the boiler ata pres-plant, per in. the exintsquare 'Then the, visitor is lei inside, and a temperature of 650° away from the great open, cualey "new. belle The boiler furnaces. are is' completed, 350" Ibs. per displayed by those in square inch and a temperature of 750° degrees ¥. will be maintained. of modesty The new boilers Tift Uheir immense and suspi is confirmed when the remark weigh dropped that. the Muni: cipal Electricity Power Plant ranks with the best in the world for all one's preconceived notions about boilers in general But a wandering wonderment is brought back to earth by more el trical figures. The steam, one is told, is transmitted through pipes to the steam turbines which drive he electrical generators, and after passing through the last stages of the turbines, the steam exhausts 0 4 vacuum produced by the contact of that steam with tubes through which cold river water being circulated, It docs not, of nlo actual contact the river water, It is then condensed back to its liquid state, a temperature of approximately Once More Into the Breach From this point it is handled by pumps and forced through heaters and transmitted through pipes back to the boilers at a temperature of 190 degrees F, It passes through an economizer or water heater on the way, through the odium of which it' extracts the heat remain-
Text read from the printed page and cleaned; old type leaves the occasional error.