Commercial economy in steam and other thermal power-plants; as dependent upon physical efficiency, capital charges and working costs by Robert Henry SmithCommercial economy in steam and other thermal power-plants; as dependent upon physical efficiency, capital charges and working costs by Robert Henry Smith

Commercial economy in steam and other thermal power-plants; as dependent upon physical efficiency…

byRobert Henry Smith

Paperback | July 4, 2012

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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. 1905 edition. Excerpt: ...but in his table Mr. Webber gives $180 per horse-power for this size. He estimates the total of the "fixed charges " as 14 per cent. of the prime total cost. His table and diagram are divided into three sections, for Simple Engines up to 80 H.P.; for Compound Condensing Engines up to 1,000 H.P.; and for Triple Expansion Condensing Engines up to 2,000 H.P. For the smaller sizes increase of price of coal from $2 to $5 per ton, raises the total annual cost by 50 per cent., which ratio again applies to the largest sizes; while at intermediate power this percentage is a little higher. At $5 per ton for coal, the total annual cost per horse-power bears to the total cost of plant a ratio which for simple engines varies, in the direction of increasing size, from TABL...V-,,-traight-line Formulae Tor Capital Costs And For Costs Per Year Op 0 0 Working Hours In £ Of Complete Power Plants In Terms Of Brake Horse-power T. 73 to "55; for compound engines from.50 up to '55 and down again to.50; and for triple-expansion engines from.45 to "39. One Board of Trade Unit of electrical power is one kilowatt hour 1-98 x 106 and equals = 2'654 x 10 ft.-lbs. This measure is 746 mainly used for the electrical output between the terminals of the generating dynamo. An efficiency of 88 £ per cent. as between this output and the similar output of the driving engine (which is the brake horse-power of this engine), would require exactly 3 million ft.-lbs. work to be done by the engine per B.T.U. If the efficiency were 89J per cent., then exactly 1£ engine brake horsepower would yield one kilowatt output from the dynamo. Although the combined mechanical and electrical efficiency of the dynamo is generally lower than this, this relation is...
Title:Commercial economy in steam and other thermal power-plants; as dependent upon physical efficiency…Format:PaperbackDimensions:84 pages, 9.69 × 7.44 × 0.17 inPublished:July 4, 2012Publisher:General Books LLCLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:1236647963

ISBN - 13:9781236647962

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