Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise on the care and management of steam engines, boilers and electric machinery (1922)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 204
ter the pump is between the heater andthe boiler. The saving effected by heating the feed water with ex-haust steam can be easily ascertained by the u^e of athermometer, a steam table, and a simple arithmetical cal-culation. First, find by thermometer the temperature ofthe water ))efore entering… … Fig. 72 192 Steam Engineering and the remainder will be the number of heat units addedto the water by the heater. Next find by table 17 the num-ber of heat units above 32°F. in the steam at the pressureordinarily carried in the boiler^ and subtract from this thenumber of heat units in the water…
