Stationary steam engines, simple and compound; especially as adapted to light and power plants . n for this case is given in Fig. 7. The heat supplied bythe boilers, reckoned at 100 per cent, meets at A percent of its own amount returned from the feed-heatingsystem, distributes per cent to the jackets, and thebalance to steam cylinder I, Transformed energy passesout of the system at C as work, of which less than 7 per centis lost as friction and is reconverted into heat and per cent is sent, at D, into the condenser, andthe curious system of heating and of adh
Stationary steam engines, simple and compound; especially as adapted to light and power plants . n for this case is given in Fig. 7. The heat supplied bythe boilers, reckoned at 100 per cent, meets at A percent of its own amount returned from the feed-heatingsystem, distributes per cent to the jackets, and thebalance to steam cylinder I, Transformed energy passesout of the system at C as work, of which less than 7 per centis lost as friction and is reconverted into heat and per cent is sent, at D, into the condenser, andthe curious system of heating and of adheating feed-wateruses a part of this, and much more, from the various jacketsand receivers, in a manner readily traced on the diagram, soas to produce, in some degree, that transfer of heat from theexpansion to the compression side of the type diagram whichhas been already described as the ideal substitute of Cotterillfor the Stirling equivalent of the Carnot system, and as indi-cated in the description, just given, of the action of theengine. 1 Trans. A. S M. E., 1900. 340 STEAM ENGINES FOR. Fig. 7.— Sankey Diagram. ELECTRIC LIGHTING PLANTS. 341 The end of the nineteenth century is that of one whichwill always remain preeminent in history as the age in whichthe steam engine took shape in the hands of Watt andSickles, and Corliss and Greene, of Porter and their succes-sors, and thus brought in the factory system and all ourmodern methods of production, with their resultant effectsin the reduction of costs of production, in the improvementof the condition of the people and in all the materialadvancement in the industrial arts which has made the cen-tury distinctively one of supremacy of the mechanic arts. The limit of progress attained to date is variously meas-ured by these figures: Approximate Data in Best Practice. Duty on basis of 1,000,000 B. T. U., foot-pounds 163,000,000 Economy measured in B. T. U., per hour, per H. 11,160 Economy measured in B. T. U.,
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