Pacific service magazine . Fig. 12 Pacific Service Magazine 107 is 72 per cent, which represents the boilerefficiency; that is, the boiler puts into thesteam 10080 B. T. U., or 72 per cent ofthe heat contained in the fuel. Thisefficiency is only obtainable when thesheets and tubes of the boiler are kept. Fig. 13 in perfectly clean condition, meaning thatthe w^ater side of the siieets and tubesshould be kept free from scale and grease;that the fire side of the sheets and tubesshould be kept clean and free from sootand ashes; that all air leaks in the boilersetting are stopped, and the draft pro
Pacific service magazine . Fig. 12 Pacific Service Magazine 107 is 72 per cent, which represents the boilerefficiency; that is, the boiler puts into thesteam 10080 B. T. U., or 72 per cent ofthe heat contained in the fuel. Thisefficiency is only obtainable when thesheets and tubes of the boiler are kept. Fig. 13 in perfectly clean condition, meaning thatthe w^ater side of the siieets and tubesshould be kept free from scale and grease;that the fire side of the sheets and tubesshould be kept clean and free from sootand ashes; that all air leaks in the boilersetting are stopped, and the draft properly regulated so that there is not an excessof cold air admitted to the furnace. Inorder to obtain an efficiency of 72 percent it is also necessary that the boilerhave competent supervision. The aver-age small steam plant boiler operatesbelow 50 per cent efficiency. However, the greatest heat loss of thesteam power plant occurs in the engine,auxiliaries and piping after the steamleaves the boiler. These heat losses in agood condensing engine plant are aboutas follows: Main engine exhaust 57 % or 7980 B. T. U. Main engine radiation 2 % or 280 B. T. U. Auxiliaries (when exhaust feed water heater is used) or 210 B. T. U. Piping 2 % or 280 B. T. U. Total % or 8750 B. T. U. With the 28 per
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Keywords: ., bookauthorpacificg, bookcentury1900, bookdecade1910, bookyear1912
