Creighton, William Henry Paul, 1859- · New York, J. Wiley & sons; [etc., etc.] · leaf 275
s reducing the formation ofscale and prolonging the life of the boiler. Most heaters areprovided with means to remove oil from the steam where thewater is used to feed boilers. The percentage gain then variesfrom 1.2 to 1.4% for each increase of 10° in the feed-water. Relative Value of Feed-water… … Fig. 137.—Hoppes Heater. boilers have less heating surface than those in this country,economizers are used extensively. Economizers cannot purify the water, neither do they serveto remove any of the absorbed gases. The purchaser has toconsider the relatively high initial cost; the high cost of…
Steam-engines · Heat-engines
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