Mastering power production ; the industrial, economic and social problems involved and their solution . f commercial pro fit-rate. Let us assume two installations one A consisting of two 2,500kilowatts turbo-generator units bearing $9,000 cumulative annualfixed charges, and an installation B of one 5,000 kilowatt unit withfixed charges amounting to $7,500 per annum. Since the smallerunits at full load would consume 15 pounds of steam per kilowatthour whereas the larger one only 13 pounds per kilowatt hourwith the cost of coal at 22^ per 1,000 pounds of steam the annualoutput of 10,000,000 kilo
Mastering power production ; the industrial, economic and social problems involved and their solution . f commercial pro fit-rate. Let us assume two installations one A consisting of two 2,500kilowatts turbo-generator units bearing $9,000 cumulative annualfixed charges, and an installation B of one 5,000 kilowatt unit withfixed charges amounting to $7,500 per annum. Since the smallerunits at full load would consume 15 pounds of steam per kilowatthour whereas the larger one only 13 pounds per kilowatt hourwith the cost of coal at 22^ per 1,000 pounds of steam the annualoutput of 10,000,000 kilowatt hours, the fuel saving would betheoretically $33,000—28,400=$4,400 per year in favor of the largerand more efficient unit, and adding economy in fixed charges($1,500) the gross saving would appear as high as $5,900 per fallacy of such a calculation is, however, easily exposed if weconsider that for our annual output the larger turbine will show theadvantages of full-load efficiency only temporarily during peak loads,the average steam consumption per kilowatt hour being in accordance. Fig. 15.—Sloppy Boiler Room Work of the men is greatly handicapped by untidy upkeep of the work of hose, puddles of water, firing and cleaning tools scattered over the floorand dilapidated seats without backs add to discomfort and fatigue and create theatmosphere I dont give a darn. 71 with its water rate curve close to 20 pounds per kilowatt hour,whereas in case A most of the time only one turbine will be runningat nearly full load (15 pounds per kilowatt hour) with the averagesteam consumption of about 17 pounds per kilowatt hour. Now,the true cost of coal per year for the same output and the sametypical load-curve appears in case A as $37,400 and in case Bas $48,400 or $11,000 in favor of the more expensive and thermallyless efficient installation. Subtracting from this gross saving theexcess of fixed charges ($1500) we still have a net gain of $9500per year, instea
Size: 1775px × 1407px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, bookidmasteringpow, bookyear1921
