. The street railway review . Its mission is the simple and useful one of returningwater of condensation to steam boilers. Its chief char-acteristics are that its action is continuous, rapid and pos-itive, and that it is a closed system operating underwidely varying conditions, without valves or construction is simply that of ordinary piping. The principles on which its action depends are asfollows: Difference of pressure may be balanced by a watercolumn. Vapors or liquids tend to flow to the point of lowestpressure. Rate of flow depends on difference of pressure and mass. Decr
. The street railway review . Its mission is the simple and useful one of returningwater of condensation to steam boilers. Its chief char-acteristics are that its action is continuous, rapid and pos-itive, and that it is a closed system operating underwidely varying conditions, without valves or construction is simply that of ordinary piping. The principles on which its action depends are asfollows: Difference of pressure may be balanced by a watercolumn. Vapors or liquids tend to flow to the point of lowestpressure. Rate of flow depends on difference of pressure and mass. Decrease of static pressure in a steam pipe or chamberis proportional to rate of condensation. In a steam current water will be carried or sweptalong rapidly by friction. sure in the boiler is (say) lOO pounds, while in the separ-ator it is only 95 pounds, due to the decrease in pressurein the steam pipe by reason of which the steam flows tothe engine. Thus the water must not only flow up hillto the boiler, but also must overcome
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
