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Power for Profit; Principles Governing the Use of Machinery and Labor in Modern Buildings

Power for Profit; Principles Governing the Use of Machinery and Labor in Modern Buildings


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About the Book

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: ...proportioned to the operation of the machine at the best point of its load, but these losses do not decrease Economic performance varies with each class of power apparatus proportionately with a reduction in the work, and sometimes increase disproportionately with an increase in the work of the machine. A water-turbine which is designed for a given condition of water-flow and pressure is at a disadvantage as soon as either element is varied, when its proportions and the angle and curvature of its blades require to be varied to suit the changed condition if its efficient operation is to be maintained. As this cannot be done, it operates disadvantageously under a reduced fall or head, or upon a reduction of the supply of water, and the result is described as a reduction in efficiency, and is usually stated in terms of a percentage of the most effective work it might theoretically accomplish. The steam-turbine or the reciprocating steam-engine, the motion of which is produced by a more flexible medium than water, can be provided with refinements of regulation, taking advantage of the expansive character of the medium of energy, and the course of ineffectiveness can be modified so as to produce a fair range of variation, within which maximum or nearly maximum economy will be maintained. But such appliances comprise two elements, each of which is affected by the varying conditions, for the steam-boilers, or in the case of gasengines the gas-producing apparatus, have also their variable characteristics dependent upon the proportions of their duty. To plan the points of economic development of energy, and to proportion work to machinery, so as to maintain that condition, offers large opportunities for the engineer, and necessarily involves consideration of the ele...


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Product Details
  • ISBN-13: 9781235916335
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 50
  • Spine Width: 3 mm
  • Width: 189 mm
  • ISBN-10: 1235916332
  • Publisher Date: 01 May 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 109 gr

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Power for Profit; Principles Governing the Use of Machinery and Labor in Modern Buildings
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