This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 Excerpt: ...to specify the actual evaporation per pound of fuel under given conditions of feed-water temperature and steam pressure, reference must be made to Table XXVII. The ratio of the heat required to convert into steam one pound of water under actual conditions, to that necessary under standard conditions, namely, from and ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 Excerpt: ...to specify the actual evaporation per pound of fuel under given conditions of feed-water temperature and steam pressure, reference must be made to Table XXVII. The ratio of the heat required to convert into steam one pound of water under actual conditions, to that necessary under standard conditions, namely, from and at 212 F., is called the Factor of Evaporation. Actual evaporations multiplied by this quantity will give standard evaporations from and at 212 F. Standard rates of evaporation may similarly be reduced to actual ones by division. TABLE XXVII. FACTORS OF EVAPORATION. For Various Feed-water Temperatures and Steam Pressures as com-pared with Evaporation from and at 212 F. Priming assumed 2 per cent. For example, let it be desired to find the expected actual evaporation per pound of mine-run bituminous coal for a horizontal return tubular boiler, using feed water at a temperature of 130 F. and carrying steam at a gage pressure of 125 lbs. per sq. in. As before, let the priming be assumed 2 per cent. The temperature corresponding to an absolute pressure of 139.7 lbs. per sq. in. is 352.9 F. Consulting the heats of the liquid at the temperatures of the steam and feed water, it is evident that 324.3-98.0 = 226.3 B.T.U. per pound will be necessary to raise the feed water to the steam temperature. To vaporize 98 per cent of the feed water into steam at an absolute pressure of 139.7 lbs. per sq. in. will require 0.98 X 867.5 = 850.2 B.T.U. per pound. The total heat necessary to evaporate water under these actual conditions will, therefore, be 226.3 + 850.2 = 1076.5 B.T.U. The ratio of this to the standard heat of vaporization from and at 212 F. 1076.5 = 11.11 is the factor of evaporation. Referring to Table XXVI the standard evaporation for the coal assu...
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New. Trade paperback (US). Glued binding. 446 p. In Stock. 100% Money Back Guarantee. Brand New, Perfect Condition, allow 4-14 business days for standard shipping. To Alaska, Hawaii, U.S. protectorate, P.O. box, and APO/FPO addresses allow 4-28 business days for Standard shipping. No expedited shipping. All orders placed with expedited shipping will be cancelled. Over 3, 000, 000 happy customers.
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
