Practical Observations On Ventilating And Warming Public Edifices Dwelling Houses Hot Houses Conservatories Illustrated Second Edition Of The Theory And Practice Of Warming And Ventilating Public Buildings By An Engineer Ie Robert Stuart Meikleham With Additions

Author : Robert Stuart Meikleham
Publisher : Rarebooksclub.com
ISBN 13 : 9781230037127
Total Pages : 58 pages
Book Rating : 4.0/5 (371 download)

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Download or read book Practical Observations on Ventilating and Warming Public Edifices, Dwelling-Houses, Etc written by Robert Stuart Meikleham and published by Rarebooksclub.com. This book was released on 2013-09 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1829 edition. Excerpt: ...fire, Mr. Gilbert thinks that for practical purposes, the specific gravity of air vitiated by combustion, being of the same temperature as the atmosphere, may be estimated at 1.0874, common air being 1. Mr. Gilbert varies greatly from other authors, in estimating the expansion of the air: in chimneys; for he measures it by the temperature of the hottest part of the fire-room. To exhibit therefore the extreme dissonance of his mode of calculation to that of others, it is necessary to assume some determinate degree of heat as likely to be that off the fireroom of a furnace having a chimney of 40 feet in height. ' being a bright red heat, cannot be less than between75O and 800 degrees of Fahrenheit, The heat of a common grate, and no great error can be committed in es-i timating that of 1a close furnace, at 1500 degrees, as is done by Mr. Gilbert himself. Here the expansion of the air by heat, 12', fire, when cooled to the temperature of the atmosphere, d," as stated in the preceding paragraph.is_'assumed to be equal to 1.087, and the density or specific gravity, of the. heated air, 5, will be 20.87, from whence sub tracting unity, or the density of the atmo sphere, the difference of density, '7, be 19.87, of which the square. root is 4.467.' The height, h, of the chimney (40 feet) divided 3 1-2)) ' I P: -141' /4., -, 7--/.4-' / $0 I..-g;', . 20,16'-D. z-..-'-z..f-'I-"i., -6-5' z.: . "7'.. by h' the height of the atmosphere supposed to be uniform, and assumed as 60.58, gives 0.001534, whose square root, 2, is equal to 0.891. Now the velocity, '0', with which the atmosphere would rush into a vacuum assumed at 1295 feet being successively mul. tiplied by /...